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| Titel |
High-precision measurement of satellite range and velocity using the EISCAT radar |
| VerfasserIn |
J. Markkanen, T. Nygrén, M. Markkanen, M. Voiculescu, A. Aikio |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 5 ; Nr. 31, no. 5 (2013-05-22), S.859-870 |
| Datensatznummer |
250019039
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| Publikation (Nr.) |
 copernicus.org/angeo-31-859-2013.pdf |
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| Zusammenfassung |
| This paper is a continuation of an earlier work by Nygrén et al.
(2012), where
the velocity of a hard target was determined from a set of echo pulses
reflected by the target flying through the radar beam. Here the method is
extended to include the determination of range at a high accuracy. The method
is as follows. First, the flight time of the pulse from the transmitter to
the target is determined at an accuracy essentially better than the accuracy
given by the sampling interval. This method makes use of the fact that the
receiver filtering creates slopes at the phase flips of the phase modulated
echo pulse. A precise flight time is found by investigating the echo
amplitude within this slope. A value of velocity is calculated from each echo
pulse as explained in the earlier paper. Next, the ranges together with
velocities from a single beam pass are combined to a measurement vector for a
linear inversion problem. The solution of the inversion problem gives the
time-dependent range and velocity from the time interval of satellite flight
through the radar beam. The method is demonstrated using the EISCAT (European Incoherent Scatter) UHF radar
and radio pulses reflected by a satellite. The achieved standard deviations
of range are about 5–50 cm and those of velocity are about 3–25 mm s−1. |
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