Phase calibration of the EISCAT Svalbard Radar interferometer using optical satellite signatures
| Autor: | E. M. Blixt, Betty Lanchester, T. Grydeland, Nickolay Ivchenko, J. Sullivan, Mike Lockwood |
|---|---|
| Přispěvatelé: | School of Physics and Astronomy [Southampton], University of Southampton, Alfven Laboratory, Royal Institute of Technology [Stockholm] (KTH ), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC), Dept. of Physics and Technology, EGU, Publication |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences [SDU.STU]Sciences of the Universe [physics]/Earth Sciences ionosphere 01 natural sciences law.invention law Radar imaging 0103 physical sciences radio science Earth and Planetary Sciences (miscellaneous) Radar lcsh:Science 010303 astronomy & astrophysics 0105 earth and related environmental sciences Remote sensing Radio Science [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Spectral signature [SDU.OCEAN] Sciences of the Universe [physics]/Ocean Atmosphere instruments and techniques lcsh:QC801-809 Geology Astronomy and Astrophysics interferometry lcsh:QC1-999 Interferometry lcsh:Geophysics. Cosmic physics Space and Planetary Science VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektromagnetisme akustikk optikk: 434 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Temporal resolution auroral ionosphere [SDU.STU] Sciences of the Universe [physics]/Earth Sciences Satellite lcsh:Q Antenna (radio) lcsh:Physics |
| Zdroj: | Annales Geophysicae, Vol 24, Pp 2419-2427 (2006) Annales Geophysicae Annales Geophysicae, European Geosciences Union, 2006, 24 (9), pp.2419-2427 Scopus-Elsevier Annales Geophysicae, Vol 24, Iss 9, Pp 2419-2427 (2006) |
| ISSN: | 1432-0576 0992-7689 |
| Popis: | The link between natural ion-line enhancements in radar spectra and auroral activity has been the subject of recent studies but conclusions have been limited by the spatial and temporal resolution previously available. The next challenge is to use shorter sub-second integration times in combination with interferometric programmes to resolve spatial structure within the main radar beam, and so relate enhanced filaments to individual auroral rays. This paper presents initial studies of a technique, using optical and spectral satellite signatures, to calibrate the received phase of a signal with the position of the scattering source along the interferometric baseline of the EISCAT Svalbard Radar. It is shown that a consistent relationship can be found only if the satellite passage through the phase fringes is adjusted from the passage predicted by optical tracking. This required adjustment is interpreted as being due to the vector between the theoretical focusing points of the two antennae, i.e. the true radar baseline, differing from the baseline obtained by survey between the antenna foot points. A method to obtain a measurement of the true interferometric baseline using multiple satellite passes is outlined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|