High-precision measurement of satellite velocity using the EISCAT radar
This paper presents a method of measuring the velocity of a hard target using radar pulses reflected from the target flying through the radar beam. The method has two stages. First, the Doppler shifts of the echo pulses are calculated at a high accuracy with an algorithm which largely improves the a...
Published in: | Annales Geophysicae |
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ftcopernicus:oai:publications.copernicus.org:angeo15622 2023-05-15T16:04:32+02:00 High-precision measurement of satellite velocity using the EISCAT radar Nygrén, T. Markkanen, J. Aikio, A. Voiculescu, M. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-30-1555-2012 https://angeo.copernicus.org/articles/30/1555/2012/ eng eng doi:10.5194/angeo-30-1555-2012 https://angeo.copernicus.org/articles/30/1555/2012/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-30-1555-2012 2020-07-20T16:25:41Z This paper presents a method of measuring the velocity of a hard target using radar pulses reflected from the target flying through the radar beam. The method has two stages. First, the Doppler shifts of the echo pulses are calculated at a high accuracy with an algorithm which largely improves the accuracy given by the Fourier transform. The algorithm also calculates the standard deviations of the Doppler frequencies with Monte Carlo simulation. The second step is to fit the results from a sequence of radar pulses to a velocity model allowing linear variation of the second time derivative of target range. The achieved accuracies are demonstrated using radio pulses reflected by a satellite passing through the beam of the EISCAT UHF radar working at 930-MHz frequency. At high SNR levels, the standard deviations of the frequency from a single pulse reach typically down to 0.2 Hz. The best standard deviations of velocity fit are below 5 mm s −1 while those of the second time derivative of range are below 1 cm s −2 . Text EISCAT Copernicus Publications: E-Journals Annales Geophysicae 30 10 1555 1565 |
institution |
Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
This paper presents a method of measuring the velocity of a hard target using radar pulses reflected from the target flying through the radar beam. The method has two stages. First, the Doppler shifts of the echo pulses are calculated at a high accuracy with an algorithm which largely improves the accuracy given by the Fourier transform. The algorithm also calculates the standard deviations of the Doppler frequencies with Monte Carlo simulation. The second step is to fit the results from a sequence of radar pulses to a velocity model allowing linear variation of the second time derivative of target range. The achieved accuracies are demonstrated using radio pulses reflected by a satellite passing through the beam of the EISCAT UHF radar working at 930-MHz frequency. At high SNR levels, the standard deviations of the frequency from a single pulse reach typically down to 0.2 Hz. The best standard deviations of velocity fit are below 5 mm s −1 while those of the second time derivative of range are below 1 cm s −2 . |
format |
Text |
author |
Nygrén, T. Markkanen, J. Aikio, A. Voiculescu, M. |
spellingShingle |
Nygrén, T. Markkanen, J. Aikio, A. Voiculescu, M. High-precision measurement of satellite velocity using the EISCAT radar |
author_facet |
Nygrén, T. Markkanen, J. Aikio, A. Voiculescu, M. |
author_sort |
Nygrén, T. |
title |
High-precision measurement of satellite velocity using the EISCAT radar |
title_short |
High-precision measurement of satellite velocity using the EISCAT radar |
title_full |
High-precision measurement of satellite velocity using the EISCAT radar |
title_fullStr |
High-precision measurement of satellite velocity using the EISCAT radar |
title_full_unstemmed |
High-precision measurement of satellite velocity using the EISCAT radar |
title_sort |
high-precision measurement of satellite velocity using the eiscat radar |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-30-1555-2012 https://angeo.copernicus.org/articles/30/1555/2012/ |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-30-1555-2012 https://angeo.copernicus.org/articles/30/1555/2012/ |
op_doi |
https://doi.org/10.5194/angeo-30-1555-2012 |
container_title |
Annales Geophysicae |
container_volume |
30 |
container_issue |
10 |
container_start_page |
1555 |
op_container_end_page |
1565 |
_version_ |
1766400120966873088 |