The Space-Based Altimeter Echo-Signal when Doppler Scattering is taken Into Account
Abstract
In the analytical approximation of time dependent average power of a satellite altimeter echo-signal (power profile) the Doppler scattering of individual specular point responses is usually neglected. Meanwhile, in the modern Ka-band altimeters the Doppler shift of reflection from a point near illuminated spot edge is greater than the frequency resolution. The equation for the power profile allowing for the Doppler effect is derived. While, as expected, the profile leading edge is not influenced by the Doppler shift, there is critical discrepancy in the trailing edge behavior between ranging LFM and BPSK signals. If for the former the Doppler shift involvement does not change trailing edge steepness for the latter it makes the profile decrease much faster. Finally, the possibility to utilize the Doppler scattering to improve along-track altimeter resolution is discussed.
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), postgraduate student and assistant of the Department of Radio Engineering Systems
Russian Federation
Master of Science in Radio Engineering (2015), postgraduate student and assistant of the Department of Radio Engineering Systems
References
1. Lavrova, O. Yu. Kostianoy, A. G., Lebedev, S. A. et al. Complex Satellite monitoring of the Russians seas. Moscow: Space Research Institute of the Russian Academy of Sciences (IKI). 2011, 470 p. (In Russian).
2. Martin S. An Introduction to Ocean Remote Sensing. 2-d ed. Cambridge University Press, 2014, 496 p.
3. Satellite Altim etry and Earth Sciences. A Handbook of Techniques and Applications; ed. by L.-L. Fu, A. Cazenave. San Diego, Academic Press, 2001, 463 p.
4. Coastal Altimetry; ed by S. Vignudelli, A. G. Kostianoy, P. Cipollini, J. Benveniste. Berlin Heidelberg, Springer-Verlag, 2011, 578 p.
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. 6 Proakis J. Digital Communications, 4th ed. McGraw-Hill, 2000, 800 p.
7. 7 Varakin L. E. Theory of Wideband Signals. Moscow, Sov. Radio, 1970. (In Russian)
8. Ipatov V. P. Spread Spectrum and CDMA. Principles and Applications, John Wiley & Sons, 2005, 398 p.
9. Verba V. S., Neronsky L. B., Osipov I. G., Turuk V. E. Space-Based Radar Systems for Earth Surveying; ed. by V. S. Verba. Moscow, Radiotekhnika [Radioengineering] Publ., 2010, 680 p. (In Russian)
10. Radiotekhnicheskie sistemy: Uchebnik dlya vuzov; pod red. Yu. M. Kazarinova [Radio Engineering Systems: Textbook for High Schools]. Moscow, Vyssh. shk., 1990, 496 p. (In Russian)
11. Raney R. K. The Delay/Doppler radar altimeter // IEEE Trans. on Geoscience and Remote Sensing. 1998, vol. GRS-36, no. 5, pp. 1578-1588.
Review
For citations:
Borovitsky D.S., Zhesterev A.E., Ipatov V.P., Mamchur R.M. The Space-Based Altimeter Echo-Signal when Doppler Scattering is taken Into Account. Journal of the Russian Universities. Radioelectronics. 2017;(3):46-51. (In Russ.)
Views:
490
Email this article 