Upper Atmosphere Facilities Review Report
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Abstract a Highly Efficient, Megawatt Class Constant
ABSTRACT Title of dissertation: A HIGHLY EFFICIENT, MEGAWATT CLASS CONSTANT IMPEDANCE TUNABLE POWER EXTRACTION CIRCUIT FOR MOBILE IONOSPHERIC HEATERS Amith Hulikal Narayan Doctor of Philosophy, 2020 Dissertation directed by: Professor Thomas M Antonsen Jr Department of Electrical Engineering Ionospheric modification (IM) refers to changes in the ambient properties of the ionosphere that are produced by humans. The ability to control and exploit iono- spheric processes helps us understand naturally occurring phenomena like aurora, scintillations, and airglow. It also helps us improve trans-ionospheric communica- tion and develop new applications that take advantage of the ionosphere as an active plasma medium. Ionospheric Heaters broadcast high power radio waves, typically in the radio frequency (RF) band, to modify the ionosphere in a controlled manner. These facilities are permanent terrestrial installations and do not presently support study at different latitudes. However, past IM experiments conducted at high lati- tudes across the world indicate a strong dependence of ionospheric processes on the geomagnetic latitude. Mobile Ionospheric Heaters will allow for the first time, quantitative explo- ration of the ionosphere at different geomagnetic latitudes. These mobile structures must be relatively smaller than the existing arrays (small enough to fit on the barge of a ship) and highly efficient at the same time. The size and efficiency of the terres- trial heating units prevent their reuse in mobile structures. These factors motivate the need for developing novel heater units. Our research focused on a new high power, high-efficiency RF source that consists of a gridless tetrode RF tube and a highly efficient power extraction circuit. -
Coordinated Optical and Radar Observations of Ionospheric Pumping for a Frequency Pass Through the Second Electron Gyroharmonic at HAARP M
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112, A06325, doi:10.1029/2006JA012146, 2007 Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP M. J. Kosch,1,2,3 T. Pedersen,1 E. Mishin,4 S. Oyama,5,6 J. Hughes,7 A. Senior,2 B. Watkins,5 and B. Bristow5 Received 30 October 2006; revised 20 January 2007; accepted 12 February 2007; published 23 June 2007. [1] On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to 2.85 MHz to ensure passing through the second electron gyroharmonic of the decaying ionosphere. Optical recordings at 557.7 and 630 nm were performed simultaneously with the side-viewing high frequency (HF) and colocated ultra high frequency (UHF) ionospheric radars. No X-mode effects were found. For O-mode pumping, when passing from below to above the second gyroharmonic frequency, the optical intensity shows a distinct increase when the plasma frequency passes through the second electron gyroharmonic, while the UHF backscatter changes from persistent to overshoot in character. The optical intensity decreases when pump wave reflection ceases, dropping to zero when upper-hybrid resonance ceases. The HF radar backscatter increases when the upper-hybrid resonance frequency passes from below to above the second gyroharmonic frequency. These observations are consistent with the coexistence of the parametric decay and thermal parametric instabilities above the second gyroharmonic. -
A Very Bright SAR Arc: Implications for Extreme Magnetosphere-Ionosphere Coupling J
A very bright SAR arc: implications for extreme magnetosphere-ionosphere coupling J. Baumgardner, J. Wroten, J. Semeter, J. Kozyra, M. Buonsanto, P. Erickson, M. Mendillo To cite this version: J. Baumgardner, J. Wroten, J. Semeter, J. Kozyra, M. Buonsanto, et al.. A very bright SAR arc: implications for extreme magnetosphere-ionosphere coupling. Annales Geophysicae, European Geo- sciences Union, 2008, 25 (12), pp.2593-2608. <hal-00318424> HAL Id: hal-00318424 https://hal.archives-ouvertes.fr/hal-00318424 Submitted on 2 Jan 2008 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ann. Geophys., 25, 2593–2608, 2007 www.ann-geophys.net/25/2593/2007/ Annales © European Geosciences Union 2007 Geophysicae A very bright SAR arc: implications for extreme magnetosphere-ionosphere coupling J. Baumgardner1, J. Wroten1, J. Semeter1, J. Kozyra2, M. Buonsanto3, P. Erickson3, and M. Mendillo1 1Center for Space Physics, Boston University, Boston, MA, USA 2Department of Atmospheric, Oceanic and Space Science, University of Michigan, Ann Arbor, MI, USA 3MIT Haystack Observatory, Westford, MA, USA Received: 8 August 2007 – Revised: 3 September 2007 – Accepted: 25 October 2007 – Published: 2 January 2008 Abstract. In contrast to the polar aurora visible during geo- 1 Introduction magnetic storms, stable auroral red (SAR) arcs offer a sub- visual manifestation of direct magnetosphere-ionosphere Extreme events in the solar-terrestrial system offer rare op- (M-I) coupling at midlatitudes. -
Defense Technical Information Center (DTIC)
Description of document: Defense Technical Information Center (DTIC) computer- generated bibliography from the Technical Report database, subject terms: High-Frequency Active Auroral Research Program or HAARP, 2014 Request date: 30-September-2014 Released date: 03-October-2014 Posted date: 13-July-2015 Source of document: Defense Technical Information Center (DTIC-R) ATTN: FOIA Requester Service Center 8725 John J. Kingman Road, Suite 0944 Ft. Belvoir, VA 22060-6218 The governmentattic.org web site (“the site”) is noncommercial and free to the public. The site and materials made available on the site, such as this file, are for reference only. The governmentattic.org web site and its principals have made every effort to make this information as complete and as accurate as possible, however, there may be mistakes and omissions, both typographical and in content. The governmentattic.org web site and its principals shall have neither liability nor responsibility to any person or entity with respect to any loss or damage caused, or alleged to have been caused, directly or indirectly, by the information provided on the governmentattic.org web site or in this file. The public records published on the site were obtained from government agencies using proper legal channels. Each document is identified as to the source. Any concerns about the contents of the site should be directed to the agency originating the document in question. GovernmentAttic.org is not responsible for the contents of documents published on the website. DEFENSE TECHNICA L INFORMATION CENTER 8725 JOHN J. KINGMAN ROAD FORT BELVO IR, VIRG INIA 22016-6218 LNRO"l.T' DTIC-R (FOIA 2015-1) OCT 3 2014 RlftRTO Thi is in re pon e to your ema il dated September 30, 2014, received in this office October I, 2014, reque ting information under the Freedom of Information Act (FOIA) (enclosure I). -
Artificial Aurora and Ionospheric Heating by HAARP
Advances in Applied Physics, Vol. 4, 2016, no. 1, 23 - 30 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/aap.2016.667 Artificial Aurora and Ionospheric Heating by HAARP S. Hadavandkhani Department of Physics, Islamic Azad University(IAU) Varamin Pishva Branch, Iran Bijan Nikouravan1 Department of Physics, Islamic Azad University (IAU) Varamin Pishva Branch, Iran & The Indian Planetary Society (IPS) Mumbai, 400092, India F. Ghazimaghrebi Department of Physics, Islamic Azad University (IAU) Varamin Pishva Branch, Iran Copyright c 2016 S. Hadavandkhani, Bijan Nikouravan and F. Ghazimaghrebi. This article is distributed under the Creative Commons Attribution License, which permits un- restricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract A recent experiment was achieved at HAARP to study the scaling of the ionospherically generated ELF signal with power transmitted from the high frequency (HF) array. The results were in excellent agreement with computer simulations. The outcomes approving that the ELF power increases with the square of the incident HF power. This paper present a review on the situation of the ionized particles in Ionospheric layer when stimulated by artificial an ELF and VLF external high energy radio waves. Keywords: Ionospheric modification, Ionospheric heating 1Corresponding author 24 S. Hadavandkhani, Bijan Nikouravan and F. Ghazimaghrebi 1 Introduction Near the ground the air is almost unionized and its electrical conductivity is negligibly small. In very near equilibrium atmosphere, gravity force has a powerful controlling effect up to about 1000 km from the ground [1]. The gradient of the refractive index is responsible for the bending of the propagation direction of the electromagnetic wave [2]. -
Incoherent Scatter Radar Observation at Millstone Hill
Ionospheric longitudinal variations at midlatitudes: Incoherent scatter radar observation at Millstone Hill The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Zhang, ShunRong et al. “Ionospheric Longitudinal Variations at Midlatitudes: Incoherent Scatter Radar Observation at Millstone Hill.” Science China Technological Sciences 55.5 (2012): 1153–1160. As Published http://dx.doi.org/10.1007/s11431-012-4784-y Publisher SP Science China Press Version Author's final manuscript Citable link http://hdl.handle.net/1721.1/104911 SCIENCE CHINA Technological Sciences May 2012 Vol.55 No.5: 1153–1160 doi: 10.1007/s11431-012-4784-y Ionospheric longitudinal variations at midlatitudes: Incoherent scatter radar observation at Millstone Hill ZHANG ShunRong*, COSTER Anthea, HOLT John, FOSTER John & ERICKSON Phil MIT Haystack Observatory, Off Route 40, Westford, MA 01866, USA Received January 2, 2012; accepted February 9, 2012; published online March 26, 2012 Incoherent scatter radar (ISR) extra-wide coverage experiments during the period of 1978–2011 at Millstone Hill are used to investigate longitudinal differences in electron density. This work is motivated by a recent finding of the US east-west coast difference in TEC suggesting a combined effect of changing geomagnetic declination and zonal winds. The current study pro- vides strong supporting evidence of the longitudinal change and the plausible mechanism by examining the climatology of electron density Ne on both east and west sides of the radar with a longitude separation of up to 40o for different heights within 300–450 km. Main findings include: 1) The east-west difference can be up to 60% and varies over the course of the day, being positive (East side Ne > West side Ne) in the late evening, and negative (West side Ne > East side Ne) in the pre-noon. -
The CEDAR Post
The CEDAR Post August 1998 Volume 34 FROM THE STEERING COMMITTEE The June 1998 CEDAR meeting was another productive and successful forum for interactions by our community. This issue of the Post presents summaries ofthe meeting highlights and the workshops convened at the meeting. A new membership list of the CEDAR Science Steering IN THIS ISSUE Committee (CSSC) for 1998-1999 is given on page 2. From the Steering Committee 1 Cassandra Fesen (University of Texas at Dallas) was CEDAR Science Steering Committee for 1998-99 2 Status of the Polar Cap Observatory 3 appointed to the committee and will chair it starting at the K. Baker: New NSF Program Director 4 end of the next CEDAR meeting in June 1999. Jean-Pierre CEDAR's Huailin Chen wins OSA's Allen Prize 4 CEDAR Post-doctoral Fellowships for 1998-2000 4 St. Maurice (University of Western Ontario, Canada) will be NSF Grant Awards from FY 1998 CEDAR Competition 5 one of the two international representatives on the CSSC. Summary Report: 1998 CEDAR Meeting 6 Roger Smith (University of Alaska) has been appointed to Workshop Reports'. serve as a liaison with the GEM community and will also ISR World Day Schedule for 1999 7 serve on the GEM Steering Committee. Andrew Stephan Communicating with One's Peers 7 I.idar: Overview, Progress and Updates 8 (Boston University) will be the student representative for Upper Atmosphere Facilities/IS Radars 9 1998-1999. We thank Michael Mendillo, Gordon Shepherd Wide Latitude Substorm (WLS) Study 9 and Julie Chang who completed their terms on the CSSC in CEDAR Storm Study 10 Synthesizing High-latitude IonosphericElectrodynamics 11 June 1998. -
An Ionospheric Modification Facility for the Magnetic Equator J
An Ionospheric Modification Facility for the Magnetic Equator J. L. Chau, Jicamarca Radio Observatory, Peru ([email protected]) S. A. Gonzalez, Arecibo Observatory, Arecibo, Puerto Rico, USA ([email protected]) M. P. Sulzer, Arecibo Observatory, Arecibo, Puerto Rico, USA ([email protected]) E. Nossa, Cornell University, Ithaca, New York, USA ([email protected]) B. Isham, Interamerican University, Bayamón, Puerto Rico, USA ([email protected]) Summary This is a conceptual proposal for the deployment of an ionospheric modification facility, also called and HF facility or ionospheric heater, near the geomagnetic equator. A heater is a powerful high- frequency (HF), or shortwave, radio transmitter that can be used to induce a number of phenomena in the ionospheric plasma. Some of these phenomena provide insights into complicated plasma physics processes that may occur elsewhere in nature but that are difficult or impossible to explore in the laboratory or numerically. Other HF-induced phenomena provide diagnostics of naturally- occurring ionospheric phenomena. HF ionospheric modification may affect the propagation of radio signals passing through the modified region, which is how the phenomenon was first discovered (i.e. the Radio Luxembourg effect [Bailey and Martyn, 1934]). HF transmissions may modify plasma density, increase electron and ion temperatures (which is why they are called heaters), create field-aligned plasma density irregularities that may be interrogated by small coherent scatter radars, and generate VLF and ELF radiation, which has practical societal utility (e.g. in underwater communications and underground remote sensing). By inducing turbulence, and through other processes, they add energy to electrostatic ion-acoustic and Langmuir modes that may be observed by incoherent scatter. -
Thermospheric Poleward Wind Surge at Midlatitudes During Great Storm Intervals
Thermospheric poleward wind surge at midlatitudes during great storm intervals The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Zhang, Shun-Rong, Philip J. Erickson, John C. Foster, John M. Holt, Anthea J. Coster, Jonathan J. Makela, John Noto, et al. “Thermospheric Poleward Wind Surge at Midlatitudes during Great Storm Intervals.” Geophysical Research Letters 42, no. 13 (July 16, 2015): 5132–40. As Published http://dx.doi.org/10.1002/2015GL064836 Publisher American Geophysical Union (AGU) Version Author's final manuscript Citable link http://hdl.handle.net/1721.1/98250 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. 1 Thermospheric Poleward Wind Surge at Mid-Latitudes During Great 2 Storm Intervals 3 4 Shun-Rong Zhang1,*, Philip J. Erickson1, John C. Foster1, John M. Holt1, Anthea J. 5 Coster1, Jonathan J. Makela2, John Noto3, John W. Meriwether4, Brian J. Harding2, 6 Juanita Riccobono3 and Robert B. Kerr3 7 8 1 MIT Haystack Observatory, Westford, MA, USA 9 2 Department of Electrical and Computer Engineering, University of Illinois at 10 Urbana-Champaign, Urbana, Illinois, USA 11 3 Scientific Solution, Inc., Chelmsford, MA, USA 12 4 Department of Physics and Astronomy, Clemson University, Clemson, SC, USA 13 14 * Correspondence: 15 Dr. Shunrong Zhang ([email protected]) 16 MIT Haystack Observatory 17 Off Route 40 18 Westford, MA 01886 19 USA 20 21 Key points 22 1. -
A Workstation-Based Incoherent Scatter Radar Data Acquisition System J
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by HAL-INSU MIDAS-W: a workstation-based incoherent scatter radar data acquisition system J. M. Holt, P. J. Erickson, A. M. Gorczyca, T. Grydeland To cite this version: J. M. Holt, P. J. Erickson, A. M. Gorczyca, T. Grydeland. MIDAS-W: a workstation-based incoherent scatter radar data acquisition system. Annales Geophysicae, European Geosciences Union, 2000, 18 (9), pp.1231-1241. <hal-00316793> HAL Id: hal-00316793 https://hal.archives-ouvertes.fr/hal-00316793 Submitted on 1 Jan 2000 HAL is a multi-disciplinary open access L'archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destin´eeau d´ep^otet `ala diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publi´esou non, lished or not. The documents may come from ´emanant des ´etablissements d'enseignement et de teaching and research institutions in France or recherche fran¸caisou ´etrangers,des laboratoires abroad, or from public or private research centers. publics ou priv´es. Ann. Geophysicae 18, 1231±1241 /2000) Ó EGS ± Springer-Verlag 2000 MIDAS-W: a workstation-based incoherent scatter radar data acquisition system J. M. Holt1, P. J. Erickson1, A. M. Gorczyca1, T. Grydeland2 1 Massachusetts Institute of Technology, Haystack Observatory, Westford, MA 01886, USA 2 University of Tromsù, Tromsù, Norway Received: 28 December 1999 / Revised: 19 June 2000 / Accepted: 21 June 2000 Abstract. The Millstone Hill Incoherent Scatter Data simpli®ed, because a workstation with the new software Acquisition System /MIDAS) is based on an abstract can be added to the network without impacting the model of an incoherent scatter radar. -
Comparison of Simultaneous Chatanika and Millstone Hill Observations with Ionospheric Model Predictions
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 91, NO. A6, PAGES 6986-6998, JUNE 1, 1986 Comparison of Simultaneous Chatanika and Millstone Hill Observations With Ionospheric Model Predictions c. E. RASMUSSEN,' R. W. SCHUNK,' J. J. SOJKA,' v. B. WICKWAR,2 O. DE LA BEAUJARDIERE,2 J. FOSTER,) J. HOLT,) D. S. EVANS,4 AND E. NIELSEN S As part of the MITHRAS program, the Chatanika and Millstone Hill incoherent-scatter radars ma.de coordinated observations of the polar ionosphere on June 27 and 28, 1981. We compare the.se da~a with predictions made by a high-latitude ionospheric mo~el. Qualitative.ly, th~ same ~eatu~es are eVident In b?th the model and the radar data: fairly constant densities on the dayslde with a mid-latitude trough formmg poleward of65 degrees around 1900 ML T (magneti~ ~ocal time~. T~is trough is seen toe~tend equat?r~ard with increasing MLT, such that the minimum densities occurnng m the tro~gh appear J~st after ml~nlght around 60 degrees dipole latitude. These features are primari~y understood In terms of different re~lOns .of convection, further influenced by photoionization and vertical transport. The only area~ of major. diS- agreement between the measurements and model are noted in the auroral ov~l and ~t a portion of the times during which substorms occurred. Quantitatively, equally good agreement IS obtamed . be~ween the model predictions and the radar data. The densities. predicted by t~e model a~e usually :-Vlthm 25% of tho~e measured by the radars, alth ough appreciable differences occur In some regions of the IOnosphere at certam times. -
EISCAT Scientific Association
The EISCAT_3D Science Case Anders Tjulin1 ([email protected]), Ingrid Mann1,2, Ian McCrea3, Anita Aikio4 and Thomas Ulich5 1EISCAT Scientific Association, Sweden; 2Umeå University, Sweden; 3STFC Rutherford Appleton Laboratory, United Kingdom; 4University of Oulu, Finland; 5Sodankylä Geophysical Observatory, Finland EISCAT_3D EISCAT, with international partners, is preparing to construct the next generation radar: EISCAT_3D. It will consist of multiple phased arrays and use state-of-the-art signal processing and beam-forming techniques to become the world's most sophisticated research radar. The five key capabilities of EISCAT_3D are: ● e Resolution of space-time ambiguity. s a c ● - 3D volumetric capability. e c n ● e EISCAT Scientific Association Sub-beam width measurements. i c EISCAT is an international research organisation, conducting s ● / Continuous monitoring of solar variability on terrestrial 7 fundamental research into solar-terrestrial physics and p atmosphere and climate. f / atmospheric science. t c ● e Model validation for space weather and global change. j EISCAT was founded in 1976 and the first EISCAT data were o r obtained in 1981. This is a unique set of capabilities of one single facility. p / e s EISCAT operates three incoherent scatter radar systems (224 MHz, . d 3 500 MHz, 931 MHz) in northern Fenno-Scandinavia and on t a c Svalbard. s i e . The EISCAT systems are located in Tromsø (Norway), Kiruna w (Sweden), Sodankylä (Finland) and Longyearbyen (Svalbard). w w EISCAT also operates an ionospheric heater and supporting Suggested EISCAT_3D site set-up instruments such as dynasondes. The planned time-line for the EISCAT_3D system is: EISCAT is at the present funded by seven The EISCAT_3D Science Case member organisations from six countries: 2005 – 2009 FP6 Design Study (completed) The EISCAT_3D Science Case is prepared as part of the ● 2010 – 2014 FP7 Preparatory Phase (ongoing) Suomen Akatemia, Finland Preparatory Phase.