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I the Telecommunications and Data Acquisition:Progress Report 42-67 R --" - ':' .' November and December1981

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I the Telecommunications and Data Acquisition:Progress Report 42-67 R -- F "_ NASA-CR_168577 ..... 19820012239 --- i The Telecommunications and Data _ Acquisition:Progress Report 42-67 r_ --" - ':'_ _.' November and DeCember1981 -- • - N.A. Renzetti .... Editor - _ , • % ° '_ i " ; ,ir_,-- •_' [ / - • I.;.4.9R 1982 February 15; 1982--:; _ " LANGLEY.RESEARCHCENTER • _ . -....-......-._..LIRR_.RY,.NA_A "" _ ¢ F HAMPTON_VIRGINIA _- NationalAeronauticsand - - Space Administration "- . " Jet PropulsionLabOratory - -_ ' _-__ California Instituteof Technology - _........ " " _- Pasadena, California ..... - "T ' • _ . _ J . _ .. :, , _ . :? . - , . " • _, ° /" _J • -_ + . 1-" ? i _ z J -.2 - .,/° . • " ' " -%- - -- I -- _ -,.- . _ ° ] L9< ._ . ,: _ - . j , • ./ . c - " • ' J - -- "< ° _ , _ '] . -; ,_ g __ , ,2 ./ -- i -, . ,. ,-,- C,,_ _- _;>" .... ' _ . - } °I // -,' .... ,: , \ / "._'\ " _ " . _ , _ \ _ _ _ _ - . - . [-- _ . -. ._ ,_ . _ _ , . - . '.___ _. .. _ l _ . _" ! "" 't ',_' '_ , . " f_ .. "- . " - r]. : ._ 2 _. • - - ' I"D. -/7 " - - _ ". ._ . "-. _ . .'_ :. _ ,-. - - . - -- _ _ %" '( Y" .W - \" - _ _ .-- 7 - . • " , - f . ,-.-._,-, t-, , r:'fi,ti;"!TS ;,E_.I!.E-STED E!,I-_J R," D ,_.t,n-.,I'!,i !:-,..... D!SPLA', _1120113/2 " "_ 82M20113,# iSSUE ![! Pf:tGE laSE_ (:I_TE(-_ORY39 RPT._: MASA-CR-168577 JPL-PR-42-G7 82/02/IS Iz_O PAGES UHCLASSiFIED DOCUMEHT IJITL: The telecommunications and data acquisition report TLSP: Froaress Report, ,.lov. - Dec. 19R! AUTH: AiRENZETTI, N. _. PAT: FJ/ed. CORP: Jet Propulsion Lab., CaliFornJ.a Inst. of Tech., Pasadena. AVAIL.HTIS SAP: HC A[;7/PIF A01 Sponsored by I'IAS_ HAJS: /-_DATA ACOUISITIOM/-_DEEP SPACE HETNORK/-:_LOGIST!CSMAHAGEHENT/:+Rt_DIO COIIMUNtC_T IOH/_SP.qCECRF1FTTRACI-IHG', MINS; /,COMPUTERIZED SIMULATION/ DECISION .H_KING! GEODESY/ GLOBAL POSITIONING SYSTEH! GROLII,IDSTF1TIONS/ HELIOS I/ HYDROGEI'IMASERS/ MAINTEI'IAHCE/ RADIO ANTENNAS/ RADIO f_STRONOHY!RADIO RECEIVERS/ SPNCE MISSIONS! SPARE P_IRTSi SUPPORToYat_HSp P - r"- / SYSTEMSFtNALYSIS! TELEHETRY/ TRAG,L! tHG STATTONS ANN; Proqress in the development and operations o{ the Deep Space NetMorl. is reported. Developments in Earth-based radio technology as applied to other research programs are also _epol-ted. These programs include 9eodynamics, astrophysics, and radio searchino {or extraterrestr.ial intelliqence in the micro_ave region of the electromagnetic spectrum. For individual title,s, see 1'182-20I 14 throuah 1'182-20130. EHTER' The Telecommunications and Data Acquisition Progress Report 42-67 November and December 1981 N. A. Renzetti Editor February 15, 1982 NationalAeronauticsand Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, California The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Preface This publication was formerly entitled The Deep Space Network ProgressReport. Although the practice of reporting progress in the development and operations of the Deep SpaceNetwork continues, the report has been expanded to include developments in Earth-based radio technology as applied to other research programs. These programs are: (1) Geodynamics: For several years, the laboratory has been developing radio interferometry at microwave frequencies for application to geodetic measure- ments. This branch of telecommunications technology is now being applied to the study of geodynamics. (2) Astrophysics: The deep space stations, individually and in pairs as an inter- ferometer, have been used by radio astronomers for astrophysics research by direct observations of radio sources. (3) An activity closely related to radio astronomy's use of the deep space stations is NASA's continuing program of radio search for extraterrestrial intelligence in the microwave region of the electromagnetic spectrum. Each succeeding issue of this report will present material in some, but not all, of the following categories: Radio Astronomy Search for Extraterrestrial Intelligence Radio Interferometry at MicrowaveFrequencies Geodetic TechniquesDevelopment Spacecraft Navigation Orbiting Very Long BaselineInterferometry Deep SpaceNetwork Description Program Planning Planetary and Interplanetary MissionSupport Advanced Systems Network and Facility Engineeringand Implementation Operations Spacecraft Radio Science Planetary Radar Energy In each issue, there will be a report on the current configuration of one of the seven DSN systems (Tracking, Telemetry, Command, Monitor and Control, Test Support, Radio Science, and Very Long BaselineInterferometry). The work described in this report series is either performed or managed by the Telecommunications and Data Acquisition organization of JPL. iii Contents SEARCH FOR EXTRATERRESTRIAL INTELLIGENCE INSTRUMENT SYSTEMSDEVELOPMENT SETI Downconverter .................................................... 1 B. Crow NASA Code 199-50-18-03 THE DEEPSPACE NETWORK DESCRIPTION OFTHE DSN The DSN Radio Science System Mark III - 1980 ................................ 6 B. J. Buckles NASA Code311-03-41-61 PLANETARY AND INTERPLANETARY MISSIONSUPPORT A Summary of Space Flight MissionsSupportedby the DeepSpace Network .......... 13 E. S. Burke NASA Code311-03-32-10 InterplanetaryFlightProjects Hellos Mission Support .................................................. 18 A. L. Berman, C.T. Stelzried,B.L Seidel,J. C. Nash,andR. E.Nevarez NASA Code 311-03-22-03 ADVANCED SYSTEMS Tracking and Ground-Based Navigation The Development of a Magnetically Enhanced Hydrogen Gas Dissoclator ............. 24 L. Maleki and T. K. Tucker NASA Code 310-10-62-14 Communications Magnetic Refrigeration for Maser Amplifier Cooling ............................. 29 D. L Johnson NASA Code 310-20-66-11 Sideband-Aided Receiver Arraying ......................................... 39 S. A. Butman, L J. Deutsch,R. G. Lipes,andR.L. Miller NASA Code 310-20-67-60 Capacity Limit of the Noiseless, Energy-EfficientOpticalPPM Channel ............... 54 J. R. Lesh NASA Code 310-20-67-59 On the Group Delay Effectof DSN MicrowaveComponents on Multimegablt Telemetry ............................................................ 59 P.J. Lee NASA Code 310-20-67-57 NETWORK AND FACILITY ENGINEERINGAND IMPLEMENTATION Network Improving the Computer-Human Interface:The Qualitative MonitorDisplay ............ 66 H. W. Baugh and A. I. Zygielbaum NASA Code311-03-43-64 Master Timing System Measurements ....................................... 70 E. F. Endsley NASA Code312-03-54-80 Optimum Equipment Maintenance/Replacement Policy Part 2. Markov Decision Approach ......................................... 75 T. Chamg NASA Code311-03-41-08 Global Positioning System Timing Receiversin the DSN .......................... 90 P. A. Clements NASA Code312-03-51-34 Noise Temperature and Noise Figure Concepts:DC to Light ....................... 1 00 C. T. Stelzded NASA Code 311-03-22-80 OPERATIONS NetworkOperations TIGER Reliability AnalysEsinthe DSN ....................................... 112 J. M. Gunn NASA Code311-03-13-25 DeepSpaceStations Special Activity Utilizationof GDSCC Antennas During 1981 ....................... 121 E. B. Jackson NASA Code311-03-11-16 Maintenance and Operations Tasks Accomplished at DSS 12 During the Antenna Panel Replacement Downtime ...................................... 127 L. Butcher, T. Jonas, and W. Wood NASA Code 311-03-11-13 Bibliography .......................................................... 129 vi TDA ProgressReport42-67 NovemberandDecember1981 SETI Downconverter B. Crow Communications Systems Research Section The SETI (Searchfor ExtraterrestrialIntelligence) breadboardsubsystem was begun in order to develop the technology to efficiently implement a SETI instrument capable of searchingwide bandwidth with highresolution. Due to the recent directivefrom Congress to terminate the program,NASA hastasked JPL to complete the SETI breadboard(since it is more than half complete) so that it will be availablefor use by aNASA-selected user by the end of FY 82. The downconverter covered in this report is the interface hardware between the receiver 1F output and ADC used as the input to the spectrum analyzer. The SETI (Search for Extraterrestrial Intelligence) down- puter control gain control that offers a 35-rib dynamic range. converter has been developedto interface between an IF input An ADC is provided to measure the output of the AGC detec- and provide complex baseband outputs for use in the SETI tot and is calibrated to provide an indication of output power. breadboard system (see Fig. 1). The IF signalis basebanded in the complex mixer where care- ful attention has been paid to the amplitude and phase balance The SETI downconverter subassembly(see Fig. 2) has been between the two baseband signals(see Fig. 3). An internal test built in a modular fashion with 13 modules in the SETI down- signal is available to allow stand-alone testing of the downcon- converter drawer and the required monitor and control and verter (and the SETI breadboard). The downconverter is con- power suppliesin a second drawer. The downconverter accepts trolled and monitored by a PDP 11/44 and is currently operat- both a 30-MHz IF (for use at an Arecibo receiver) and a ing as designed in the development laboratory. 50-MHz IF (for use with a Block III DSN receiver). The 50-MHzIF is translated to 30 MHz in the downconverter. Two Table 1 is a list of the technical requirements and the meao types of signal gain control are available: (1) an AGC loop surements that have been
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