Potential Accuracy of Joint Parameter Estimate by Space-Based Radar Altimeter
Abstract
The subject of research is a space-based radar altimeter. Modern satellite altimeters along with the instant distance to an earth surface are to measure the sea wave height and scattering cross section per unit of a probed spot. Ranking of specific measuring algorithms for the quantities mentioned is carried out by comparison of their accuracy indicators with the reference which is minimum theoretical estimate variance established by the Cramer-Rao bound. Calculation of such bounds in case of joint estimate comes down to inversion of the Fisher information matrix. In the paper, this task is solved within the framework of Gaussian approximation of both compressed ranging pulse and antenna pattern. As a result, expressions for noise variances of joint estimates of satellite height, significant wave height and power SNR are obtained. Quantifying the received equations into figures is implemented by numerical integration.
About the Authors
D. S. Borovitsky
JSC "Russian Institute of Radionavigation and Time" (Saint Petersburg)
Russian Federation
Ph.D. in Engineering (2016), leading research fellow
Russian Federation
Ph.D. in Engineering (2016), leading research fellow
A. E. Zhesterev
JSC "Russian Institute of Radionavigation and Time" (Saint Petersburg)
Russian Federation
Ph.D. in Engineering (1982), Chief of the Department
Russian Federation
Ph.D. in Engineering (1982), Chief of the Department
V. P. Ipatov
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
D.Sc. in Engineering (1983), Professor (1985) of the Department of Radio Engineering Systems
Russian Federation
D.Sc. in Engineering (1983), Professor (1985) of the Department of Radio Engineering Systems
R. M. Mamchur
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Master of Science in Radio Engineering (2015), post-graduate student and assistant of the Department of Radio Engineering Systems
Russian Federation
Master of Science in Radio Engineering (2015), post-graduate student and assistant of the Department of Radio Engineering Systems
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Review
For citations:
Borovitsky D.S., Zhesterev A.E., Ipatov V.P., Mamchur R.M. Potential Accuracy of Joint Parameter Estimate by Space-Based Radar Altimeter. Journal of the Russian Universities. Radioelectronics. 2017;(4):33-41. (In Russ.)
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