Share Email Print

Proceedings Paper

Delay/Doppler compensation: a new concept for radar altimetry
Author(s): R. Keith Raney
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This new satellite radar altimeter concept uses on-board real-time partially coherent processing to realize an along-track impulse response shape and position which are not degraded by terrain slope or elevation. The key innovation is delay compensation, analogous to range curvature correction in a burst mode synthetic aperture radar. The detected outputs of many bursts are incoherently integrated to accumulate more than one hundred equivalent looks. The along-track footprint size is on the order of 200 - 300 meters. The radar equation for the delay/Doppler radar altimeter has an h(-5/2) dependence on height, which is more efficient than the corresponding h(-3) factor for a pulse-limited altimeter. The radiometric response obtained by the new approach would be 10 dB stronger than that of the TOPEX/POSEIDON altimeter, for example, if the same hardware were used in the delay/Doppler mode. The concept is a candidate small satellite instrument for earth observation, with particular suitability for precision altimetry of coastal and polar ice sheets.

Paper Details

Date Published: 15 December 1995
PDF: 8 pages
Proc. SPIE 2583, Advanced and Next-Generation Satellites, (15 December 1995); doi: 10.1117/12.228587
Show Author Affiliations
R. Keith Raney, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 2583:
Advanced and Next-Generation Satellites
Hiroyuki Fujisada; Martin N. Sweeting, Editor(s)

© SPIE. Terms of Use
Back to Top