The UNIVERSITY of WISCONSIN

Home , Little Rockford, Wilkes Station

Geophysical & Polar Research Center

DEPARTMENT OF GFOLOGY

AEROMAGNETIC RECONNAISSANCE OF ANTARCTICA BETWEEN BYRD AND WILKES STATIONS

Ned A. Ostenso and Edward C. Thiel

RESEARCH REPORT NO. 64.6 - July 1964

Research Report Series Number 64-6 July 1964

AEROMAGNETIC RECONNAISSANCE OF ANTARCTICA BETWEEN BYRD AND WILKES STATIONS

Ned A. Ostenso and Edward C. Thiel*

The University of Wisconsin Geophysical and Polar Research Center 6021 South Highland Road Madison, Wisconsin 53705

*Deceased I TABLE OF CONTENTS

Page

INTRODUCTION .... 0 0 a 9 a

RESIDUAL MAGNETIC PRO]FILES ...... 3

QUANTITATIVE INTERPRE' TATION...... 6

REGIONAL TOTAL MAGNET' IC FIELD...... 7 ...... i ACKNOWLEDGEMENTS 10 ...... 11 REFERENCES......

APPENDIX ...... 13 Flight T-1 ...... 15 Flight T-2 a.18 Flight T-3 .. 20 Flight T-4 21 Flight T-5 23 Flight T-6 . . 25 Flight T-7 ...... 27 Flight T-8 ...... 29 Flight T-9 31 Flight T-10 ......

ILLUSTRATIONS

Figure 1 ... 2 5 Figure 2 ... 8 Figure 3 ... 9 Figure 4 ... 4 Table 1 ...

iii INTRODUCTION

During the three austral field seasons from 1958 to 1961, 13,000 km of airborne magnetics were flown in the sector of Antarctica between the 85th West meridian and Wilkes Station (660 15'S, 110 0 31'E). This survey, consisting of 12 flights, was flown in U. S. Navy Air Development Squad- ron-6 aircraft instrumented with a Varian nuclear precession magnetometer which recorded the absolute value of the earth's total field (F). Two of the flights, those east of Byrd Station (79*59'S, 120*01'W), have been previously reported by Behrendt and Wold (1963) in conjunction with other flights in this area. The remainder are shown in Figure I and include, (T-l) Little America to Byrd Station, (T-2) the 1959 Byrd Station traverse reconnaissance flight, (T-3) Edsel Ford Range reconnaissance flight, (T-4) Little America to McMurdo Station, (T-5) McMurdo to Wilkes Station, (T-6) Wilkes to McMurdo Station, (T-7) McMurdo to Byrd Station, (T-8) McMurdo to the South Pole Station, (T-9) McMurdo to Little Rockford to Byrd Station and, (T-10) Ross Ice Shelf reconnaissance flight.

All but two tracks were flown in a R4D (DC-3) aircraft with the magnetometer sensing head towed at the end of a 30 m cable. The flights between McMurdo and Wilkes Station were flown in a P2V (Neptune) aircraft with the sensing head mounted in a non-magnetic fiberglass extension of the fuselage. On all flights tight circles were flown over areas of zero magnetic gradient to confirm adequate isolation from the aircraft's magnetic field.

The elevation of the aircraft during flight was determined by aner- oid altimeter with an estimated accuracy of ±200 m. On November 9, 1961, Thiel was killed in an airplane crash while on an aeromagnetic flight between McMurdo, Mirny and Wilkes Stations. In addition to the tragic loss of life, some valuable data were lost, including notes on the elevation of the flights between McMurdo and Wilkes Station and McMurdo and Byrd Station.

Navigation was dependent upon dead-reckoning, augmented by sun lines of position. Uncertainties in horizontal position control may be as great as 50 km.

The Varian magnetometer was designed to cycle approximately every 0.7 sec. Thus, at the normal flying speed of 280 km/hr, a magnetic ob- servation was made every 55 m. The readout of the magnetometer was in analog form and in practice the analog record was picked only four times a minute or approximately every kilometer of horizontal distance traveled. These data were then fed into the CDC 1604 computer at the University of Wisconsin Computing Center which computed F from the precession frequency and downward continuations to depths of 5, 6, 8 and 10 km below flight level using the formula of Henderson (Ostenso, 1962). -- --- m m m m - m m m - - I =

Figure 1 -3-

No corrections were made for temporal changes in the earth's magnetic field as attempts to correlate such changes over great distances from the Antarctic magnetic observatories might introduce more ambiguities than it would eliminate. Pudovkin (1956) has shown that in subpolar regions magnetic variations differ significantly at points only 200-300 km apart. However, a "degree of credence" for the anomalies along any profile can be obtained if the intensity of magnetic disturbance of the region being surveyed is known for the time of the survey. The K-indices that are available from Antarctic observatories for the flight intervals are listed in Table 1. From these it is possible to obtain a qualitative estimate of temporal disturbances which might be expected on each magnetic profile. Fortunately, none of the flights were made during periods of magnetic storms; the highest K-index during any flight was 5, the average being 3. In addition, the observatory magnetograms were checked and no correlation could be found between temporal magnetic disturbances and significant anomalies. All of the survey flights were adjusted to mean values of F of 6 4,870y at Little America, 6 0,700y at Byrd Station, 6 5,6 00y at McMurdo, 65,7101 at Wilkes Station, and 59, 250y at the Pole Station.

The regional magnetic field was removed from the observed aeromagnetic profiles by use of stiff splines so that a smooth line, giving the best overall fit to the observed data, could be drawn through a profile. The resulting residual magnetic profiles along the various flight lines are shown in Figure 1.

RESIDUAL MAGNETIC PROFILES

Bentley and Ostenso (1961) and Behrendt and Wold (1963) have discussed the division of West Antarctica by the Byrd Subglacial Basin into what ap- pear to be separate geologic provinces. North and west of the basin is a region of young volcanic mountains, whereas, to the south and east of the basin a more extensive area comprised mainly of sediments and metasediments (see schematic geologic base map in Fig. 2). The above investigators discussed the difference in magnetic character between these two provinces; the latter province exhibiting a smoother residual field than the former. The region of West Antarctica covered by the aeromagnetic survey reported here consists solely of the young volcanics and, as shown in Figure 1, has the characteristic intense residual magnetic field of such an environment. Similar magnetic profiles were obtained over East Antarctica on the flights between McMurdo and Wilkes Station. This portion of the continent is be- lieved to be a Precambrian shield, bordered on its eastern margin by thick sedimentary series (Ross and Beacon Series) which have been uplifted and faulted forming a mountain system along the southwestern margin of the Ross Ice Shelf and extending to the Weddell Sea (Anderson, 1962).

In contrast to these regions of West and East Antarctica, the Ross Ice Shelf is marked by relative magnetic quiescence, suggesting under- lying material of low magnetic susceptibility. It is interesting to note on the McMurdo to Pole flight that no anomaly is associated with the pos- tulated fault zone along the northeastern flank of the Queen Maud Range. Table 1

K-Indice Flight Da te Flight Interval/U.T. Time/U. T. South Pole Byrd

Little America to Byrd (T-l) 6-7 Dec. 1958 2309-0230 21-24 3 3 00-03 3 4 Byrd Station Traverse Recon (T-2) 21 Dec. 1958 1124-1802 09-12 5 4 12-15 4 3 15-18 4 2 Edsel Ford Range Recon (T-3) 23-24 Dec. 1958 2323-0355 21-24 3 3 00-03 4 3 03-06 4 4 Little America to McMurdo (T-4) 3 Jan. 1959 0017-0247 00-03 2 3 McMurdo to Wilkes (T-5) 2-3 Dec. 1959 2115-0050 21-24 3 00-03 4 Wilkes to McMurdo (T-6) 3 Dec. 1959 0521-0908 03-06 4 06-09 4 09-12 5 McMurdo to Byrd (T-7) 13 Dec. 1959 0317-0740 03-06 3 06-09 2 McMurdo to Pole (T-8) 6-7 Jan. 1960 2335-0430 21-24 2 00-03 1 03-06 2 McMurdo to Little Rockford to Byrd (T-9) 15 Jan. 1960 0619-0915 06-09 3 1156-1325 09-12 3 12-15 4 Ross Ice Shelf Recon (T-10) 22 Oct. 1961 0136-0935 00-03 03-06 06-09 09-12

-=mmmm -m -m -m m-I I = m - --- - m - m - - - - - I =

LA1

ROSS

, KILOMETERS O 50 100 150

50 100 NAUTICAL MILES

CALCULATED DEPTH TO TOPOF SOURCE TERTIARY AND RECENT VOLCANICS CRASHSITEQUARTZITE - PALEOZOIC(?) INTRUSIVES BASEMENT COMPLEX (ACID TO -4! OF MAGNETIC ANOMALYRELATIVE TO (GRANITE'AND GRANODIORITE) INTERMEDIATE IGNEOUS ROCKS AND 2 SEA LEVEL IN KILOMETERS INTENSELY DEFORMED METASEDIMENTARY SEQUENCE ARGILLACEOUS/ARENACEOUS SEDI- -MENTS INTRUDED BY COARSE- ELEVATION OF BEDROCKIN METERS [ ANDEAN INTRUSIVES SERIES 00 BEACONSANDSTONE (QUARTZ AND [] LOWERPALEOZOICS (FOLDED SLATES GRAINEDGRANITE) -1120 AS DETERMINED BY REFLECTION - (GRANITE-GABBRO) ARKOSICSANDSTONE, SHALE, AND GRAYWACKES) + THURSTONISLAND GROUP(GRANITE,QUARTZITE SEISMOLOGY CONGLOMERATE LIMESTONE, COAL ++ AND HORNBLEND GNEISS WITH A METAMOR- AND DIABASE SILLS ) Nt'J-PHOSED SERIESOF EMPLACED DIKES

Figure 2 -6-

QUANTITATIVE INTERPRETATION

In an attempt to determine the origin of the magnetic anomalies, Peters' (1949) half-slope method was used to compute depths to sources of selected anomalies. Only the anomalies shown by the computed downward continuations to be uncontaminated by adjoining anomalies were used in these calculations. In practice only a small percentage of the total number of recorded anomalies were sufficiently symmetrical and "pure" to be usable for quantitative consideration. Recent evaluations of practical applications of Peters' method have been discussed by Sanker-Narayan (1961), Ostenso (1962) and Behrendt and Wold (1963). Suffice it to say here that any likely deviation from the conditions assumed by the method will result in too great a computed depth to the source of an anomaly. Thus, all computations can be considered as giving the maximum, probable depth to the origin of an anomaly. Furthermore, no great reliance should be given to any single calculation, however, a group of depth estimates from a number of determinations is significant.

The depths, relative to sea level, to the origin of the magnetic anomalies suitable for such calculations are shown in Figure 2 on a schematic geologic base map (after Bentley, 1960). The elevations of the subglacial rock surface determined from seismic soundings are also shown.

The depth calculations in West Antarctica that are near seismic soundings are in close agreement with the rock surface elevations determined by the reflection measurements. In fact, considering the mountainous character of this region, they agree surprisingly well. Thus, it appears that the sources of the magnetic anomalies occur at the rock surface, as might be expected in such a volcanic region. In this portion of West Antarctica aeromagnetic surveys would be an expeditious way to obtain a qualitative picture of sub-ice topography and maximum possible ice thickness.

Geological investigations have shown that young volcanic intrusions are found along the western periphery of the Ross Ice Shelf wherever rock is exposed. These volcanics are known to have high magnetic susceptibility (Robinson, in press) in contrast to the low susceptibility (0.14 to 10.15 x 10-4 c.g.s. units) reported by Bull and Irving (1960) for the igneous country rock of South Victoria Land. The general quiescence of the magnetic profiles over the Ross Ice Shelf reflects the paucity of volcanic activity in this area in marked contrast to its environs. However, twelve anomalies were suitable for depth computations (Fig. 2). The bulk of these areI located along the eastern margin of the ice shelf and give an average depth of 1 314 km. From seismic soundings, Crary (1961) reports that the ice shelf may be underlain by the Beacon series. Only at Little America V1 was the refraction profile lung enough to penetrate this formation (P wave velocity 4.24 km/sec) and to establish its thickness at 647 m. The Beacon series is underlain here, at a depth of 2815 m below sea level, by material with a compressional wave velocity of 6.39 km/sec and is overlain by a 1325 m thick sedimentary column with a P wave velocity of 2.40 km/sec. The upper surface of the 4.24 km/sec layer is at an elevation of -1933 m. Thus it is reasonable to conclude that the sources of these anomalies areI I I -7-

high susceptibility volcanics at or near the top of the Beacon(?) series; similar to the volcanic relationship in the series adjacent to the ice shelf. Bennett (in preparation) suggests that the source of similar magnetic anomalies may be the top of the 6.39 km/sec layer.

The remaining anomalies, which gave a considerable scatter of greater depths (i.e. 31, 31, 4, 5 , 6, and 71 km) most probably are but indicative of inherent difficulties in quantitative interpretation of magnetic data over thin lava flows. One of the assumptions used in Peters' method is that the anomalous mass extends to infinite depth. As the length of the mass in the vertical direction becomes small relative to the depth of burial to the top surface of the mass, a greater than real depth is obtained by this method of calculation.

Because the flight elevations on the McMurdo-Wilkes Station tracks are unknown, any attempt at computing the depth to anomaly sources would be meaningless. Flight elevations could have varied from 3500 m to 6500 m.

REGIONAL TOTAL MAGNETIC FIELD

A map of the regional total magnetic field (F) is shown in Figure 3 for the portion of West Antarctica where there is sufficient data to per- mit contouring. The aeromagnetic flight tracks, from which the data for constructing this map were obtained, are shown as dotted lines. Isogonic lines from H. 0. 1703 S (adjusted to 1958) are shown as dashed contours. The interval for both sets of contours is .01 oersted (000y). Observed regional gradients were determined by fitting a stiff spline through the observed aeromagnetic profile. All flights are tied to the mean value of F at the magnetic observatories as described earlier. The estimated accuracy of the observed regional total field at any point is ±2 00T.

As can be seen in Figure 3 there is appreciable divergence between the observed field and the calculated field from H. 0. 1703 S. Such divergence ip hardly surprising considering the limited data upon which the 1955 U. S. Hydrographic Office chart was based. Rather, it is re- markable that the fields are even similar, which speaks well for the system of extrapolation used in constructing the Hydrographic Office (now U. S. Navy Oceanographic Office) charts. The observed field shows a gen- erally higher value but lesser gradient than the computed field, although the contour orientations are very similar.

In 1962 the Soviet investigator, Shlyakhtina, published a total field map for all of Antarctica and surrounding oceans (an enlarged portion of this map is shown in Fig. 4). This map was based upon all magnetic observatory data available as a result of the IGY program plus the following ship data: //I ] ::::::':'"=...... , °°9°0oo,w°° ......

0 ° o ow_...... __._ -ON OOE-

...... % "..

:' . Z -,...... ,'.."...

• 5 1 .00 , :...... • .."00, . .:__. .:-- •0.0 .. 00BY D*

• " 1000:' 0001"

.53--."0,"00iI .. t1 r -- n. "'"'-.%:. 10,I, ,..-..o°00 ...... :, % ...... >#.,% , : ,WOOP,

.0,1 °o000,

.5 5 - -...... 0#00

o1 000 .000, .•01 lop , 'z/ ,/ OBSE VED 0.00 >" 40""/o0ope, / / ., 6e t ,,0.0, FROM(ADJ STED-O.O. 705198)...- S % j ...... NET C FLGHT LINE,.10,/ A ROMA 001J-0 0100 -at .100 57o 000 V LITTL .5FigureCA

EATH TOTLIMGNEI I rI IIo I I -- -= m- m mm m m - I m

700S

see 800S • ... 1500E

70°S 150°W 180°W TOTAL MAGNETIC FIELD (AFTER SHLYAKHTINA, 1962)

Figure 4 -10- I I Ship Country Period Sector I Ob U.S.S.R. 1957-58 Pacific sector Zarya U.S.S.R. 1959-61 trans-global, between lat. 4'50'S. I Vema U.S.A. 1959-60 30 - 60*S. latitude Endeavor New Zealand 1958-60 between New Zealand and Antarctica Soya Japan 1958 between South Africa and Antarctica I

As should be expected, the Soviet chart is in close agreement with I the total field observed from this aeromagnetic study. However, the airborne data show a less steep field gradient than indicated on Shlyakhtina's map. I

ACKNOWLEDGEMENTS I This study was supported by the Office of Antarctic Programs, National Science Foundation, with air support provided by Air Development Squadron-6 (VX6), United States Navy. Messrs. Bennett, Behrendt, Robinson and Wold of I the Geophysical and Polar Research Center reviewed the manuscript and made helpful suggestions. I I I I I I I I 1 I -11-

REFERENCES

Anderson, J. J. (1962) Bedrock geology of Antarctica, Univ. of Minn. M.S. Thesis, unpublished, 234 pp.

Behrendt, J. C., and R. J. Wold (1963) Depth to magnetic basement in West Antarctica, J. Geophys. Res., 68, 1145-1153.

Bennett, H. F. (in preparation) A gravity and magnetic survey of the Ross Ice Shelf area, Antarctica, Univ. of Wisc. Geophys. and Polar Res. Ctr. Research Report 64-3.

Bentley, C. R., and N. A. Ostenso (1961) Glacial and subglacial topography of West Antarctica, J. Glaciol., 3, 882-911.

Bentley, C. R. (1960) Geologic map of Antarctica, unpublished.

Bull, C., and E. Irving (1960) The paleomagnetism of some hypabyssal intrusive rocks from south Victoria Land, Antarctica, Geophys. J., 3, 211-224.

Crary, A. P. (1961) Marine-sediment thickness in the eastern Ross Sea area, Antarctica, Bull. Geol. Soc. Am., 72, 787-790.

Ostenso, N. A. (1962) Geophysical investigations of the Arctic Ocean Basin, Univ. of Wisc. Geophys. and Polar Res. Ctr. Research Re- port 62-4, 77-93.

Peters, L. J. (1949) The direct approach to magnetic interpretation and its application, Geophysics, 14, 290-320.

Pudovkin, I. M. (1956) Concerning magnetic field variations in the carrying out of precise aeromagnetic surveys, Izvestiya Akad. Nauk. SSSR, Geophys. Series, 8, 997-998 (DRB Canada translation T393R, June 1963).

Robinson, E. S. (in press) Correlation of magnetic anomalies with bedrock geology in the McMurdo Sound area, Antarctica, J. Geophys. Res.

Sanker-Narayan, P. V. (1961) Mathematical methods in the interpretation of magnetic data, Univ. of Wisc. unpublished Ph.D. thesis.

Shlyakhtina, A. P. (1962) A map of the distribution of the strength of the T geomagnetic field in Antarctica, Geomagnetism and Aeronomy (English ed.) 2, 635-638. I

I I I I -13-

LITTLE AMERICA TO BYRD. FLIGHT T-1, 6-7 DECEMBER 1958

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensit Y/Y Latitude/S Longitude/W Elevation/m ' 1109 64216 78021 159025' 490 63154 1524 1110 64181 1240 62943 64146 62808 64119 62733 64110 62750 64093 62808 1115 64067 1245 62825 1790 64049 62918 64058 62792 64058 62699

64067 490 62724 1790 1120 64049 78027' 157040' 1250 62599 64040 62553 64067 62499 64075 62449 64084 62458 1125 64067 1255 62466 64058 62532 64058 62976 64023 62909

63979 490 62817 1790 1130 64102 910 1300 62682 64040 62292 63953 62102 63918 62184 63918 62078 1135 64014 1305 62160 63935 62086 63815 62102 63824 62184

63832 910 62086 1790 1140 63867 1310 62160 63850 62342 63789 62657 63711 62649 63677 62383 1145 63685 870 1315 62168 1980 63677 62111 63642 62375 63616 62433

63642 870 62383 1980 1150 63594 1320 62350 63564 62483 63556 62491 63547 62333 63573 1324 62242 1155 63556 1325 62391 63452 62358 63401 62201 63384 62094

63350 870 62119 1980 1200 63333 1220 1330 61882 2130 63325 62013 63299 62192 63299 62119 63274 1334 62086 78°25' 132030' 1205 63274 1335 62004 63282 61914 63308 61923 63342 61898

63393 1220 61939 2130 1210 63410 1340 61947 63418 61988 63401 61996 63384 61955 63345 61914 1215 63299 1520 1345 61898 63256 61898 63248 61914 63197 61923

63154 1520 61947 2130 1220 63103 1350 61841 63027 61791 62993 61799 62968 61783 62968 61718 1225 62985 1355 61710 62993 61726 63112 61726 63461 61702

63359 1520 61645 2130 1230 63461 1524 1400 61508 63427 61371 63316 61323 63163 61323 63120 ' 61395 1235 62976 78043 143o20' 1405 61419 62842 61387 62918 61347 63239 61468 LITTLE AMERICA TO BYRD. FLIGHT T-1, 6-7 DECEMBER 1958 (con't)

Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m

61492 2130 1410 61484 61476 61443 61451 61484 1415 61379 2440 61419 61435 61395

61291 2440 1420 61230 79017' 126000' 61235 61283 61331 61371 ' ' 1425 61291 79025 125040 61299 61227 ' 1428 61196 79025 124055' 2400 -15-

BYRD STATION TRAVERSE RECON. FLIGHT T-2, 21 DECEMBER 1958

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/y- Latitude/S Longitude/W Elevation/m

1124 60564 79016' 121°00' 2134 61080 2622 ' 1125 60666 1255 60980 76049 126015' 60690 61063 60682 60988 60603 60678 60557 61233 1130 60518 1300 61080 2744 60533 61089 60541 61072 60479 61114

60479 2134 61097 2744 1135 60572 1305 61089 2896 60611 61063 1137 60635 79007' 121045' 61029 60627 60980 60627 60997 1140 60683 1310 61021 60740 60913 60756 60930 60772 60963

60804 2134 60963 2896 1145 60732 1315 60946 60667 60888 60619 60812 60546 60770 60571 60720 1150 60742 1320 60686 60907 60643 60980 60600 60890 60557

60783 2134 60514 2896 1155 60865 1325 60495 60948 60520 60964 60537 60997 60520 61106 60528 1200 61004 2140 1330 60537 2774 60921 60528 60871 60479 60888 60413

60938 2140 60388 2774 1205 61029 1335 60388 2561 61148 60388 61276 60413 61276 60413 61208 60281 1210 61046 78°05' 124040' 1340 60215 61233 60215 61232 60182 61231 60158 61230 2140 60158 2561 1215 61229 1345 60149 2439 61227 60190 61226 60396 61225 60322 61224 60248 1220 61223 1350 60198 61222 60149 61221 60158 61220 60166 61219 2140 60141 2439 1225 61218 2286 1355 60094 61217 60070 61215 60045 61214 60021 61213 59996 1230 61212 1400 59972 2430 61211 59947 61210 59922 61209 59898

61208 2286 59873 2430 1235 61207 1405 59849 61206 59824 61204 59800 61203 59775 61202 59751 1240 61201 1410 59726 61200 59701 1242 61199 77°28' 126030' 2440 59677 61123 59652

61352 2440 59628 2430 1245 61165 1415 59603 61216 59579 60989 59554 60762 59523 61012 59453 1250 61327 2622 1420 59453 61089 59501 60997 59453 U 61063 1423 59389 75004' 116000' I -16-

BYRD STATION TRAVERSE RECON. FLIGHT T-2, 21 DECEMBER 1958 (con't) I Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/- Latitude/S Longitude/W Elevation/m

59365 2430 61072 2317 1425 59405 1555 61174 59421 61242 I 59437 61225 59606 61327 59783 61395 1430 59767 ' 1600 61480 2439 1431 59694 74049' 116000 61472 59767 61437 59734 61352 I

59638 2430 61369 2439 ' ' 1435 59509 1605 61575 75024 128035 59389 61773 59381 61781 59397 61843 I 59453 61825 1440 59630 1610 61829 59791 61832 59962 61836 59864 61838

59831 2430 61842 ' 2439 I 75054 ' 1445 59823 1620 61845 129045 59929 61849 59929 61852 60092 61856 60133 61859 1450 60207 1625 61863 I 60306 61866 60133 61870 59994 61873

60019 2430 61877 2439 1455 60076 1630 61880 2957 60043 61884 I 60019 61887 60076 61891 60149 61894 1500 60248 1635 61898 60347 61901 ' ' 1502 60380 74053 119030 61905 I 60413 61908

60446 2430 61912 2957 1505 60471 1640 61915 60471 61919 60479 61956 60537 62200 I 60580 62026 1510 60555 1645 61973 60529 62078 60504 ' ' 62139 1513 60479 75019 119030 62173 I 60453 2430 62156 ' ' 2957 1515 60415 2439 1650 62376 77001 131045 2896 60405 62802 60322 62802 60264 62650 60347 62500 1520 60421 1655 62606 I 60653 62561 60770 62535 60754 62526

60720 2439 ' ' 62526 2896 1525 60545 75024 122000 1700 62802 I 60471 62760 60570 62718 60661 62675 60871 62633 1530 61029 2440 1705 62591 60988 62549 60921 62507 I 60787 62465

60812 2440 62423 2896 1535 60804 1710 62381 60804 62339 60862 62296 I 60921 62455 60904 62147 1540 60896 1715 62156 2682 60913 62156 60896 62235 60938 62296 I 61097 2440 62385 2682 1545 61163 1720 62526 61153 62464 61143 62402 61134 62358 61124 62385 1550 61114 2317 1725 62420 I 61105 62500 61046 62570 61055 62623 I I -17-

BYRD STATION TRAVERSE RECON. FLIGHT T-2, 21 DECEMBER 1958 (con't)

Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m

62606 2682 1730 62544 62517 62597 62614 62544 1735 62508 62659 62793 62945

62954 2682 1740 62811 2286 62909 63007 62900 62793 1745 62811 62829 62838 62882

62954 2286 1750 62963 62981 63016 63088 63088 1755 62981 2073 62998 63106 63260

63469 2073 1800 63515 1829 63351 1802 63125 78044' 142010' I -18-

EDSEL FORD RANGE RECON. FLIGHT T-3, 23-24 DECEMBER 1958 I Time Total Flight Time Total Flight GMT Intensity/y- Latitude/S Longitude/W Elevation/m GMT Intensity/y Latitude/S Longitude/W Elevation/m

' 1200 64016 78017' 157*18 1520 1320 63087 1830 64007 63130 64025 63069 I 64034 63001 64061 62966 1205 64061 1325 62949 64043 62949 64016 62966 63972 63035 I 63954 63026

1210 63945 1520 1330 63035 1830 63909 63026 63909 63035 63866 63122 63831 63217 I 1215 63813 1335 63322 63804 63322 63795 63278 63787 63252 63778 63243 I 1220 63760 1520 1340 63304 1830 63751 63330 63751 63348 63734 63374 63742 63269 1215 63760 1345 63382 1890 63822 1346 63513 76031 ' 145015' I 63892 63540 63787 63557 63734 63504

1220 63681 1520 1350 63452 1890 63663 63417 I 63646 63400 63628 63391 63637 63400 1225 63601 1355 63426 63584 63382 63584 63391 63581 63417 I .63572 63443 ' 1230 63563 78010' 150005 1520 1400 63531 1890 63554 63698 63545 63795 63535 63787 I 63526 63804 ' 1235 63517 1405 63839 75056' 147020 1620 63508 63822 63498 63831 63489 63848 63478 63875 U 1240 63452 1830 1410 64025 1220 63400 63945 63356 63884 63304 63884 63278 63778 1245 63235 1415 63663 1310 I 63182 63681 63130 63822 63400 63981 63690 64016

1250 63654 1830 1420 64007 1310 63426 63927 I 63295 63935 63330 63934 63443 63932 1255 63417 1425 63931 63174 63930 63139 63929 63165 I 63927 63148 63979

1300 63104 1830 1430 64084 ' 1310 63104 1431 64128 76034' 150000 63113 64146 63078 64067 I 62923 63962 1305 62923 1435 63867 62913 63824 1307 62902 ' 77056 142055' 63841 62891 63858 62880 63850 I 1310 62869 1830 1440 63824 62872 63798 1310 62932 63772 62906 63746 62872 63737 1315 62881 1445 63720 1220 I 62898 63711 62906 63703 62992 63694 63104 63703 I I -19-

EDSEL FORD RANGE RECON. FLIGHT T-3, 23-24 DECEMBER 1958 (con't)

Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m

1450 63711 77*46' 15010' 1220 63720 63746 63746 63754 1455 63720 63694 63651 63616 63599

1500 63590 1310 63599 63625 63642 63668 1505 63694 63720 63772 63979 64163

1510 64216 1400 64040 63893 63893 63927 1515 63953 63988 64032 64084 64146

1520 64207 ' 1400 1521 64040 77*29' 155010 64023 64075 64137 1525 64172 64172 64172 64163 64181

1530 64084 1520 64023 64023 64049 64032 1535 64049 64067 64102 64110 64110

1540 64110 1520 1541 64128 77052' 159000' 64146 64163 64181 1545 64207 1460 64259 64356 64445 64480

1450 64471 1460 64462 64445 64418 64409 1555 78007' 160047' I -20-

LITTLE AMERICA TO MCMURDO. FLIGHT T-4, 3 JANUARY 1959

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/y Latitude/S Longitude/W Elevation/m

0017 64818 78033' 164030' 760 65331 1220 64890 65343 64827 65355 ' ' 0020 64782 78038 164050 0150 65349 64729 65343 64711 65349 64702 65349 64569 65368 0025 64551 0155 65380 64587 65380

64667 760 65380 1220 64738 65386 65392 64729 ' 0 0030 64667 0200 65398 78013 176 08'E 64676 65400 I 64676 65402 64693 65404 64711 65406 0035 64729 0205 65407 64747 65409

65411 I 64755 760 1220 64782 65413 64809 65415 0040 64818 0210 65429 64827 65435 64827 65453 64818 65471 I 64818 65508 0045 64782 0215 65613 64782 65693

64782 760 65767 1220 64818 65898 65954 I 64836 0050 64863 0220 65942 64899 65804 64908 65662 64908 65563 64899 65465 0055 64917 0225 65447 I 64944 65453

64953 760 65477 1220 64944 65539 64935 65594 ' ' 0100 64926 78039 172025 0230 65662 64931 65699 I 64940 65687 64944 65650 64962 65607 0105 64962 0235 65582 64953 65570 I 64953 760 65557 1220 64962 65563 64971 65563 0110 64989 0240 65563 65016 65563 65025 65563 65061 65576 I 65070 65601 0115 65079 0245 65638 65088 65656 ' 65106 760 0247 65669 77050 166045'E 1220 65115 I 65133 0120 65151 65151 65151 65151 65142 I 0125 65151 65160

65169 760 65178 1220 65205 0130 65232 I 65227 65227 65223 65242 0135 65270 65301 I 65343 1220 65337 65307 0140 65276 ' ' 78°19 179052 65270 65270 I 65276 65288 0145 65294 65307 I -21-

MCMURDO TO WILKES. FLIGHT T-5, 2-3 DECEMBER 1959

Time Total Flight Time Total Flight GMT Intensity/T Latitude/S Longitude/E Elevation/m GMT Intensity/y Latitude/S Longitude/E Elevation/m

2115 66591 75024' 136030' unknown 2245 66457 unknown 66485 66495 0 66505 66485 66600 66600 66371 66843 2120 66332 2250 66867 72000' 121034' 66361 66731 66457 66594 66533 66515 66533 66561

2125 66524 unknown 2255 66512 unknown 66562 66502 66562 66434 66572 66395 66591 66482 2130 66591 2300 66346 66572 66619 66581 66887 66639 66531 66765 66492

2135 66771 unknown 2305 66561 unknown 66677 66619 66584 66414 66495 66006 66457 66015 2140 66457 2310 66035 66466 65996 66476 65948 66452 65929 66380 66015

2145 66342 unknown 2315 66121 unknown 66265 66150 66217 66189 66237 66209 66237 66336 2150 66342 2320 66414 70050' 118*32' 66438 66346 66514 66404 66610 66424 66736 66355

2155 66629 unknown 2325 66414 unknown 66524 66424 66409 66434 66332 66385 66304 66258 2200 66409 2330 66219 66418 66267 66901 66277 67056 66258 66736 66346

2205 66610 unknown 2335 66355 unknown 66562 66258 66600 66102 66687 65938 66775 66006 2210 66736 2340 66404 I 66716 66385 66629 66238 66466 66434 66380 66718

2215 66390 unknown 2345 66649 unknown 66380 66609 66438 66659 66658 66659 66775 66580 2220 66697 73016' 126°30' 2350 66443 66658 66404 66707 66395 66668 66375 66572 66404

2225 66639 unknown 2355 66346 unknown 66852 66316 66726 66287 66950 66238 67105 66180 2230 66988 2400 66141 66775 66170 66716 66130 66697 66150 66746 66130

2235 66668 0005 66091 unknown unknown 66572 66022 66284 0007 66015 ' 68058' 115035 66132 66064 66170 66095 2240 66351 0010 66040 66533 65882 66581 65743 66457 65799 66428 65780 -22-

MCMURDO TO WILKES. FLIGHT T-5, 2-3 DECEMBER 1959 (con't)

Time Total Flight GMT Intensity/y Latitude/S Longitude/E Elevation/m

0015 65808 unknown 65891 65993 66198 66329 0020 66441 66460 66404 66319 66319

0025 66348 unknown 66470 66432 66338 66319 0030 66113 66113 66237 66514 66380

0035 66524 unknown 66418 66476 66284 I 65820 0040 65725 65716 65706 65905 65678 I 0045 65641 unknown 65952 65858 65801 65650 0050 65706 1110341 -23-

WILKES TO MCMURDO, FLIGHT T-6, 3 DECEMBER 1959

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/E Elevation/m GMT Intensity/y Latitude/S Longitude/E Elevation/m

' ' 0521 53937 71006 118044 unknown 53924 unknown 53795 54050 53795 54069 53777 54057 0525 53764 0655 54139 53733 54292 53709 54485 53709 54549 53727 54420 0530 53795 0700 54286

53851 unknown 54031 unknown 53900 53936 53931 53936 53925 53917 0535 53944 0705 53949 53950 53987 53974 54012 54037 54038 54080 54063 ' ' 0540 54080 0710 54127 74042 133000

54080 unknown 54171 unknown 54137 54197 54143 54235 54118 54203 0545 54074 0715 54190 53906 54197 53888 54203 53888 54197 53919 54203 0550 53968 0720 54209

54068 unknown 54222 unknown 54093 54216 54093 54203 54087 54197 0555 54049 0725 54197 53999 54209 54005 54203 54030 54197 54037 ' 54216 0600 54005 72040 123o000 0730 54203

54005 unknown 54152 unknown 54068 54108 54112 54089 54180 54063 0605 54243 0735 54057 54093 54089 53999 54133 53917 54254 53955 54343 0610 54127 0740 54388

54229 unknown 54362 unknown 54216 54336 54152 54317 54076 54273 0615 53974 0745 54229 53936 54203 53892 54184 53854 54203 53835 54197 0620 53873 0750 54197

53968 unknown 54178 unknown 54095 54139 54089 54108 54012 54089 0625 53980 0755 54063 53987 54044 53980 54038 53987 54025 53974 53980 0630 53961 0800 53924

53980 unknown 53917 unknown 53968 53999 53999 53974 54038 53924 0635 54031 0805 53911 54018 53911 53999 53911 54018 53924 54095 53924 0640 54197 0810 53936

54248 unknown 53930 unknown 54292 53924 54323 53924 54222 53936 0645 54209 0815 53961 54273 53999 54190 54006 54082 54018 53924 54044 0650 53879 0820 54050 -24-

WILKES TO MCMURDO, FLIGHT T-6, 3 DECEMBER 1959 (con't)

Time Total Flight GM Intensity/y Latitude/S Longitude/E Elevation/m

54025 unknown 54076 54057 54025 0825 54038 54038 54050 54101 54063 ' ' 0830 54044 76056 147045

54050 unknown 54044 54057 54018 0835 53999 53993 54025 54025 54018 0840 54018 I 53999 unknown 54025 54063 54095 0845 54108 54063 54076 54050 54050 0850 54082

54069 unknown 54076 54057 54031 0855 54006 54006 53999 53987 53987 0900 53980

53993 unknown 53999 54018 54012 0905 54012 54012 54006 0908 53999 77 31' 155°10,

I I I -25-

MCMURDOTO BYRD. FLIGHT T-7, 13 DECEMBER 1959

Time Total Flight Time Total Flight GMT Intensity/T Latitude/S Longitude/E Elevation/m GMT Intensity/y Latitude/S Longitude/W Elevation/m ' 1517 65505 78052 175000' unknown 63875 unknown 65505 63875 65478 63858 1520 65442 1720 63850 65423 63832 65414 63824 65414 63806 65396 63780 1525 65360 1725 63772 65332 63772

65305 unknown 63789 unknown 65296 63780 65269 63772 1600 65241 79011' 175015' 1730 63711 65232 63634 65223 63590 65223 63564 65205 63547 1605 65196 1735 63530 65169 63513

65142 unknown 63513 unknown 65115 63530 65097 63547 1610 65079 1740 63573 81001' 156015' 65052 63608 65043 63599 65052 63547 65016 63495 1615 64971 1745 63444 64935 63393

64962 unknown 63342 unknown 64953 63316 64971 63291 1620 64962 1750 63308 64971 63325 65115 63299 64935 63248 64872 63205 1625 64818 1755 63171 64782 63188

64755 unknown 63163 unknown 64738 63129 64738 63103 ' 1630 64764 1800 63061 81000' 150°00 64809 63027 64800 63018 64747 63095 64702 63205 1635 64684 1805 63120 64702 62960

64693 unknown 62934 unknown 64631 62985 64587 63265 1640 64596 80009' 175*15'W 1810 63044 64551 63350 64498 63342 64471 63018 64445 62876 1645 64445 1815 62800 64454 62741

64454 unknown 62691 unknown 64498 62733 64498 62876 1650 64462 1820 62758 64471 62657 64347 62640 64303 62607 64224 62574 1655 64207 1825 62591 64172 62591

64146 unknown 62566 unknown 64119 62582 64119 62607 1700 64154 1830 62607 80059' 142005' 64189 62615 64216 62615 64259 62582 64233 62557 1705 64154 1835 62499 64110 62591

64093 unknown 62699 unknown 64067 62574 64014 62449 1710 63935 80048' 163 10'W 1840 62400 63901 62408 63893 62267 63909 62160 63927 62078 1715 63944 ' 1845 61980 80040 135050' 63893 61923 -26-

MCMURDO TO BYRD. FLIGHT T-7, 13 DECEMBER 1959 (con't)

Time Total Flight GMT Intensity/T Latitude/S Longitude/W Elevation/m

61898 unknown 62029 62160 1850 62062 61906 62201 62053 62375 1855 62741 62716

62127 unknown 61816 61759 1900 61791 61540 61411 61395 61694 1905 61637 61726

61637 unknown 61476 61387 1910 61484 61613 61645 61726 61670 1915 61573 80020' 127000' 61557

61573 unknown 61581 61419 1920 61204 61148 61188 61283 61435 1925 61411 61108

61044 unknown 61084 61204 1930 61196 61204 61148 60706 60737 1935 60650 60557

60479 unknown 60487 60549 1940 60619 80°00' 120000' -27-

MCMURDO TO POLE. FLIGHT T-8, 6-7 JANUARY 1960

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/E Elevation/m GMT Intensity/y Latitude/S Longitude/E Elevation/m

2335 65374 78059' 167047' unknown 0105 64174 unknown 65355 64155 65346 64137 65346 64119 65346 64101 2340 65327 0110 64092 82007' 171022' 65317 64073 65317 64064 65308 64046 65298 64019

2345 65298 unknown 0115 64000 unknown 65289 63982 65270 63964 65260 63936 65251 63918 2350 65241 0120 63900 65241 63901 65241 63892 65232 63892 65232 63874

2355 65232 unknown 0125 63865 unknown 65222 63856 65204 63847 65194 63838 65185 63820 0000 65166 0130 63802 65166 63775 65147 63739 65119 63703 65091 63676

0005 65072 unknown 0135 63658 unknown 65044 63631 65007 63613 64988 63604 64979 63595 ' ' 0010 64960 80o10' 169035' 0140 63568 83005 172°00 64950 63568 64932 63550 64913 63541 64894 63514 0015 64875 64847 unknown 0145 63496 unknown 64819 63487 64810 63477 64810 63465 63452 0020 64800 0150 63443 64782 63416 64782 63389 64782 63363 64782 63327

0025 64782 ' unknown 0155 63309 83037' 171058 unknown 64791 63283 64782 63256 64782 63230 64736 63212 0030 64662 0200 63185 64625 63167 64620 63150 64616 63123 64597 63105

0035 64578 unknown 0205 63088 unknown 64569 63052 64541 63035 64532 63017 64514 ' ' 63000 0040 64504 81*12 170032 0210 62991 64514 62965 64495 62938 64467 62930 64440 62912

0045 64421 unknown 0215 62903 unknown 64412 62895 64393 62895 64384 62886 64366 62868 0050 64356 0220 62851 64338 62842 64338 62825 64329 62807 64311 62790

0055 64292 0225 62772 unknown unknown 64274 62755 64265 62731 62706 64238 62681 0100 64228 0230 62657 64219 62632 64210 62607 64192 62583 U 64183 62558 I -28- MCMURDO TO POLE. FLIGHT T-8, 6-7 JANUARY 1960 (con't) I Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/E Elevation/m GMT Intensity/1- Latitude/S Longitude/E Elevation/m

0235 62537 unknown 0405 60636 unknown 62494 60619 62468 60611 I 62459 60554 62450 ' 60538 0240 62442 85°00 169015' 0410 60530 62420 60490 62398 60457 62376 60441 62354 60425 I

0245 62333 unknown 0415 60393 unknown 62311 60344 62289 60320 62267 60296 62245 60272 1 0250 62234 0420 60231 62208 60215 62208 60191 62191 60135 62174 60087

0255 62157 unknown 0425 60015 88048' 175000' unknown I 62140 59999 62115 59967 62098 59959 62072 59935 ' 0300 62047 0430 59903 88059 175030' 62023 I 61998 61974 61949

0305 61924 unknown 61899 61874 I 61849 61824 ' ' 0310 61800 85052 170006 61775 61750 61725 I 61700

0315 61675 unknown 61651 61626 61601 61576 I 0320 61551 61526 61501 61477 61462

0325 61437 I unknown 61445 61395 61378 61353 0330 61320 61337 I 61295 61278 61253

0335 61228 unknown 61295 I 61204 61204 61212 0340 61162 61137 61095 61071 I 61055

0345 61039 unknown 61023 61008 60992 60976 I 0350 60964 60948 60939 60922 60903

0355 60882 ' 87040' 169030 unknown 60833 60808 60775 60751 0400 60742 60734 I 60726 60685 60644 I -29-

MCMURDO TO LITTLE ROCKFORD TO BYRD. FLIGHT T-9, 15 JANUARY 1960

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/E Elevation/m GMT Intensity/r Latitude/S Longitude/W Elevation/m

0619 65455 78°49' 174640' 750 64773 750 0620 65446 0750 64773 65427 64764 65427 64737 65418 64719 65427 64691 0625 65455 0755 64709 65483 64700 65483 64700 65474 64709

65446 750 64700 750 0630 65427 0800 64664 65390 64655 65371 64655 65343 64646 65325 64646 0635 65306 0805 64637 65251 64627 65196 64618 65142 64608

65087 750 64601 750 0640 65032 0810 64637 64977 64592 64922 64528 64867 64501 64812 64474 0645 64757 0815 64465 79009' 164000' 64703 64456 64648 64419 64593 64374

64510 750 64374 750 0650 64456 0820 64347 0651 64456 79023' 179°00'W 64347 64620 64356 64784 64338 64948 64338 0655 65112 0825 64374 65112 64347 65122 64356 65103 64347

65103 750 64429 750 0700 65067 0830 64401 65067 64320 65057 64249 65057 64204 65048 64168 0705 65021 0835 64150 65001 64168 64995 64150 64990 64159

64984 750 64158 750 0710 64984 0840 64157 65067 64156 65085 64154 65334 64153 65399 64152 0715 65427 0845 64151 65278 64141 65067 64124 64956 64088

64938 750 64061 750 0720 64956 0850 64034 64993 64016 65085 64025 65177 64052 65195 64124 0725 65103 0855 64204 65002 64329 64929 64320 64929 64231

64931 750 64186 750 0730 64901 0900 64150 64872 64141 64842 64115 64828 64097 64846 64088 ' 0735 64846 0905 64088 79o01' 155u25 64837 64070 64825 64061 64816 64097

64807 750 64097 750 0740 64798 0910 64124 64789 64132 64782 64132 64782 64141 64782 64079 0745 64782 79°20' 169°18'W 0915 64034 79o06' 153o15' Down at Little 64773 Rockford Station from 0915' to 1156 ' 64764 1156 63010 7927 144o12 1750 64773 62968 MCMURDO TO LITTLE ROCKFORD TO BYRD. FLIGHT T-9, 15 JANUARY 1960 (con't)

Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m

62918 1750 62859 1200 62817 79030' 143015' 62775 62750 62724 62699 1205 62682 62657 62640

62599 1750 62549 1210 62506 62464 62421 62400 62408 1215 62400 62391 62350

62325 1750 62325 1220 62317 62300 62292 62283 62283 1225 62259 62240 62283

62300 1750 62292 1230 62119 62070 62062 62037 62021 1235 61996 61955 62358

62234 1750 62097 1240 61960 61891 61816 61799 61972 1245 62366 79048' 133010' 61914 61670

61833 1750 62004 1250 62127 1500 61791 61508 61500 61573 1255 61702 61540 61492

61387 1500 61276 1300 61313 79053' 129045' 61349 61386 61275 61036 1305 60989 61132 61180

61251 1500 61307 1310 61359 61469 61613 61726 61637 1315 61565 61387 61267 61211 1500 61132 1320 61180 61219

1325 61243 79 o51 ' 123'o50' -31-

ROSS ICE SHELF RECON. FLIGHT T-10, 22 OCTOBER 1961

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/y Latitude/S Longitude/W Elevation/m

0136 63901 78037' 15900' 300 63806 300 63892 63841 63847 63867 63820 63850 0140 63802 0310 63815 63820 63841 63856 63850 63892 63867 63918 63891 0145 63946 0315 63914

63892 300 63938 300 63865 63961 63865 63985 63883 64008 0150 63901 0320 64032 63883 64075 63847 64119 63847 64119 63867 64154 0155 63875 0325 64128

63789 300 64137 300 63746 64128 63685 0330 64084 77051' 160010' 2440 63703 64049 0200 63720 64014 63685 64023 63608 63962 63608 0335 63953 63582 63927 0205 63452 63953

63461 300 63927 2440 63367 0339 63884 78°18' 159045' 63359 0340 63850 63299 63832 0210 63256 63841 63188 63834 63214 63842 63222 0345 63850 63205 63832 0215 63205 63798

63205 300 63772 2440 63129 63737 63129 0350 63729 63120 63729 0220 63120 79*35' 151005' 63703 63095 63703 63044 63677 63002 0355 63651 62968 63685 0225 62960 63711

62968 300 63599 2440 0227 62993 80025' 148015' 63564 62985 0400 63573 63035 63538 0230 63103 63504 63112 63427 63137 63393 63154 0405 63367 ' 63342 0406 63342 79004 154°05' 0235 63180 63359

63265 300 63350 2440 63299 63384 63427 0410 63599 63504 63504 0240 63513 63444 63513 63452 63530 63487 63564 0415 63495 63504 63469 0245 63469 63461

63427 300 63418 2440 63435 63367 63487 0420 63316 63487 63291 0250 63504 63248 63504 63214 63530 63197 63582 0425 63188 63616 63180 0255 63616 63154

63677 300 63137 2440 63806 63129 63754 0430 63205 63746 63256 0300 63772 63222 63737 63180 63720 63154 63729 0435 63129 63746 63095 0305 63772 63078 -32-

ROSS ICE SHELF RECON. FLIGHT T-10, 22 OCTOBER 1961 (con't)

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/y Latitude/S Longitude/W Elevation/m

63078 2440 61931 2440 63061 61890 0440 63061 0610 61857 0441 63061 80029' 153050' 61824 63027 0612 61767 84005' 154020' 63027 61742 63018 61742 0445 62993 0615 61734 63035 61718 63018 61710

63120 2440 61694 2440 63129 61678 0450 62892 0620 61637 62783 61605 62817 61581 62850 61573 0454 62792 80054' 152005' 61573 0455 62968 0625 61581 62918 61605 62691 61613 pp 62516 2440 61613 2440 62441 61573 0500 62441 0630 61500 62474 61460 62582 61451 62549 61435 62549 61395 0505 62557 ' 81000' 145015' 0635 61363 85010 152005' 62699 61331 62825 61291

62624 2440 61275 2440 62383 61243 0510 62350 0640 61211 62342 61188 62358 61164 62383 61148 0515 62408 61196 62433 0645 61196 62458 61180

62466 2440 0647 61156 85022' 146'20' 2440 62425 61172 0520 62375 61204 62358 0650 61243 62358 61283 62342 61331 62342 61387 0525 62342 61419 62358 0655 61435 62375 0656 61460 85025' 151030'

62383 2440 61500 2440 62408 61540 0530 62408 61557 ' 62441 0700 61605 85020' 156040 62483 61678 62508 61750 62491 61783 0535 62499 61775 62508 0705 61767 62508 61767

62474 2440 61775 2440 62458 61775 0540 62474 ' 61742 0541 62466 82035 154040' 0710 61718 62458 61734 62449 61759 62449 61816 0545 62416 61865 62350 0715 61939 62308 62021

62292 2440 62094 2440 62283 62143 0550 62283 62143 62275 0720 62152 62292 62194 62300 62264 62308 62353 0555 62308 62423 62308 0725 62494 62283 62565

62259 2440 62582 2440 62225 62591 0600 62160 62591 62119 0730 62599 62094 62649 62078 626 74 ° ° 62062 0733 62674 84 2l1' 172 0 ' 0605 62029 62691 62004 0735 62674 61980 62649 -33-

ROSS ICE SHELF RECON. FLIGHT T-10, 22 OCTOBER 1961 (con't)

Time Total Flight Time Total Flight GMT Intensity/y Latitude/S Longitude/W Elevation/m GMT Intensity/y Latitude/S Longitude/E Elevation/m

62666 2440 64883 2440 62716 64901 62783 64920 0740 62808 0910 64938 62792 64965 62766 64975 62724 65002 62691 65021 0745 62691 0915 65039 62724 65048

62766 2440 65076 2440 62817 65094 62867 65122 0750 62918 0920 65149 62968 65149 63018 65168 63044 65177 63086 65195 0755 63137 0925 65213 63180 65223

63197 2440 65241 2440 63205 65260 63231 65288 0800 63265 0930 65306 63282 65315 63291 65325 63291 65353 63308 65381 0805 63333 0935 65409 78005' 167015' 63367

63410 2440 63444 63495 0810 63504 82043' 178030'E 63513 63530 63556 63590 0815 63616 63642

63659 2440 63703 63729 0820 63772 63789 63815 63832 63858 0825 63884 63918

63935 2440 63953 63979 0830 64005 64023 64049 64093 64119 0835 64137 64154

64163 2440 64198 64207 0840 64242 64277 64294 64321 64338 0845 64365 64383

64409 2440 64436 64462 0850 64489 81003' 171045'E 64516 64551 64596 64631 0855 64631 64631

64649 2440 64684 64720 0900 64738 64764 64782 64809 64818 0905 64845 64855