Preview

Journal of the Russian Universities. Radioelectronics

Advanced search

STUDY OF ROBUST TOA DISCRIMINATORS FOR SPACE-BASED RADAR ALTIMETER

https://doi.org/10.32603/1993-8985-2018-21-4-13-23

Abstract

This paper  provides  a study  of robust  TOA discriminators used  in ground-based retracking  of a space-based altimeter da-ta. Requirements to an on-board TOA tracking loop are limited  to reliable locking of received echo-signal  within the tracking  window,  while fine measuring of altimetry parameters (orbit height,  SWH, etc.) is a task  of the Earth-based retracking.  In the  robust  algorithms TOA-measuring  is performed without  using  any  echo  physical  model.  It can  improve space-based altimeter operation near the coastline  where  terrain areas falling into the illuminated spot distort  the received signal  significantly  versus  the  one  from  the  “pure” water  surface.  Analytic  calculation of  noise  errors  is fulfilled  for  the OCOG. Besides, the threshold discriminators and simulation results are presented, as well as comparison of the robust  discriminators against  the  optimal (within the  classical model  framework) one.  Despite the  robust  types  yield to the  optimal one  in the  accuracy  of TOA estimate, the  loss is not  catastrophic and  often  can be treated as an acceptable pay-ment for low sensibility  to the deviation of scattering  characteristics of a sounded surface  from  classical models.

About the Authors

D. S. Borovitsky
JSC "Russian Institute of Radionavigation and Time"
Russian Federation

Dmitry S. Borovitsky – Ph.D. in Engineering (2016), leading research fellow of JSC "Russian Institute of Radionavigation and Time" (Saint Petersburg). The author of 22 scientific publications. Area of expertise: broadband radiolocation and radionavigation systems; signal theory.

120, Obukhovskoy Oborony Pr., bld. EC, 192012, St. Petersburg.



A. E. Zhesterev
JSC "Russian Institute of Radionavigation and Time"
Russian Federation

Alexander E. Zhesterev – Ph.D. in Engineering (1982), Chief of the Department of JSC "Russian Institute of Radionavigation and Time" (Saint Petersburg). The author of 31 scientific publications. Area of expertise: radiolocation and radionavigation systems; communication theory.

120, Obukhovskoy Oborony Pr., bld. EC, 192012, St. Petersburg.



V. P. Ipatov
Saint Petersburg Electrotechnical University "LETI"
Russian Federation

Valery P. Ipatov – D.Sc. in Engineering (1983), Professor (1985) of the Department of Radio Engineering Systems of Saint Petersburg Electrotechnical University "LETI". Honored scientist of the RF (2001), honorable radioman of the USSR (1983). The author of more than 300 scientific publications. Area of expertise: radio-electronic system engineering; statistical communication theory; broadband radar, navigation and data systems; signal theory.

5, Professor Popov Str., 197376, St. Petersburg.



R. M. Mamchur
Saint Petersburg Electrotechnical University "LETI"
Russian Federation

Ruslan M. Mamchur – Master of Science in Radio Engineering (2015), post-graduate student and assistant of the Department of Radio Engineering Systems of Saint Petersburg Electrotechnical University "LETI". The author of 11 scientific publications. Area of expertise: statistical communication theory; broadband radar, navigation and data systems; signal theory; technical electrodynamics.

5, Professor Popov Str., 197376, St. Petersburg.



References

1. Coastal Altimetry. Ed. by S. Vignudelli, A. G. Kostianoy, P. Cipollini, J. Benveniste. Berlin, Springer, 2011, 565 p.

2. Chelton D. B., Ries J. C., Haines B. J., Fu L.-L., Callahan P. S. Satellite Altimetry. Satellite Altimetry and Earth Sciences: a Handbook of Techniques and Applications. Ed. by L.-L. Fu, A. Cazenave. San Diego, Academic Press, 2001, pp. 1–132.

3. Borovitsky D. S., Zhesterev A. E., Ipatov V. P., Mamchur R. M. Voprosy postroeniya radiointerfeisa sputnikovogo vysotomera [The Issue of Constructing Air Interface of Satellite Altimeter]. Ed. by V. P. Ipatov. SPb., BKhV-Peterburg, 2017, 192 p. (In Russian)

4. Barrick D. E., Lipa B. J. Analysis and Interpretation of Altimeter Sea Echo. Advances in Geophysics. 1985, vol. 27, pp. 61–100.

5. Brown G. S. The Average Impulse Response of a Rough Surface and its Applications. IEEE Trans. on Ant. and Prop. 1977, vol. AP-25, no. 1, pp. 67–74.

6. Hayne G. S. Radar Altimeter Mean Return Wave-forms from Near-Normal-Incidence Ocean Surface Scattering. IEEE Trans. on Ant. and Prop. 1980, vol. AP-28, no. 5, pp. 687–692.

7. Wingham D. J., Rapley C. G., Griffiths H. New Techniques in Satellite Altimeter Tracking Systems. Proc. of IGARSS’86 Symp., Zurich, 8–11 Sept., 1986, pp. 1339–1344.

8. Hwang C., Guo J., Deng X., Hsu H.-Y., Liu Y. Coastal Gravity Anomalies from Retracked Geosat/GM Altimetry: Improvement, Limitation and the Role of Airborne Gravity Data. J Geod. 2006, vol. 80, pp. 204–216.

9. Bao L., Lu Y., Wang Y. Improved Retracking Algorithm for Oceanic Altimeter Waveforms. Progress in Natural Science. 2009, vol. 19, no. 2, pp. 195–203.

10. Deng X., Featherstone W. E. A Coastal Retracking System for Satellite Radar Altimeter Waveforms: Application to ERS-2 around Australia. J. of Geophysical Research. 2006, vol. 111, C06012 (1–16).

11. Levin B. R. Teoreticheskie osnovy statisticheskoi radiotekhniki [Theory of Statistical Radioengineering]. Moscow, Radio i Svyaz’, 1989, 656 p. (In Russian)

12. Tikhonov V. I. Statisticheskaya radiotekhnika [Statistical Radio Engineering]. Moscow, Radio i Svyaz’, 1982, 624 p. (In Russian)

13. Davis C. H. Growth of the Greenland Ice Sheet: a Performance Assessment Of Altimeter Retracking Algorithms // IEEE Trans. Geoscience Remote Sensing. 1995, vol. 33, no. 5, pp. 1108–1116.

14. Davis C. H. A Robust Threshold Retracking Algorithm for Measuring Ice-Sheet Surface Elevation Change From Satellite Radar Altimeters. IEEE Trans. Geoscience Remote Sensing. 1997, vol. 35, no 4, pp. 974–979.

15. Fenoglio-Marc L., Fehlau M., Ferri L., Becker M., Gao Y., Vignudelli S. Coastal Sea Surface Heights From Improved Altimeter Data in the Mediterranean Sea. Proceedings GGEO2008. Springer Verlag, IAG Symposia, pp. 253–261.

16. Lee H., Shum C. K., Yi Yu., Braun A., Chung-Yen Kuo. Laurentia Crustal Motion Observed Using TOPEX/Poseidon Radar Altimetry Over Land. J. of Geodynamics. 2008, vol. 46, pp. 182–193.


Review

For citations:


Borovitsky D.S., Zhesterev A.E., Ipatov V.P., Mamchur R.M. STUDY OF ROBUST TOA DISCRIMINATORS FOR SPACE-BASED RADAR ALTIMETER. Journal of the Russian Universities. Radioelectronics. 2018;(4):13-23. (In Russ.) https://doi.org/10.32603/1993-8985-2018-21-4-13-23

Views: 626


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 1993-8985 (Print)
ISSN 2658-4794 (Online)