Journal cover Journal topic
Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 31, 859-870, 2013
https://doi.org/10.5194/angeo-31-859-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Regular paper
22 May 2013
High-precision measurement of satellite range and velocity using the EISCAT radar
J. Markkanen1, T. Nygrén2, M. Markkanen3, M. Voiculescu4, and A. Aikio2 1EISCAT Scientific Association, Tähteläntie 54 B, 99600 Sodankylä, Finland
2Department of Physics, University of Oulu, P.O. Box 3000, 90014, Finland
3Eigenor Ltd, Lompolontie 1, 99600 Sodankylä, Finland
4Department of Physics, Faculty of Sciences, University "Dunărea de Jos" Galaţi, St. Domnească, No. 47, 800008 Galaţi, Romania
Abstract. 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.

Citation: Markkanen, J., Nygrén, T., Markkanen, M., Voiculescu, M., and Aikio, A.: High-precision measurement of satellite range and velocity using the EISCAT radar, Ann. Geophys., 31, 859-870, https://doi.org/10.5194/angeo-31-859-2013, 2013.
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