Average Return Pulse Form and Bias for the S193 Radar Altimeter on Skylab as a Function of Wave Conditions

  1. Soren W. Henriksen,
  2. Armando Mancini and
  3. Bernard H. Chovitz
  1. Willard J. Pierson Jr. and
  2. Emanuel Mehr

Published Online: 15 MAR 2013

DOI: 10.1029/GM015p0217

The Use of Artificial Satellites for Geodesy

The Use of Artificial Satellites for Geodesy

How to Cite

Pierson, W. J. and Mehr, E. (1972) Average Return Pulse Form and Bias for the S193 Radar Altimeter on Skylab as a Function of Wave Conditions, in The Use of Artificial Satellites for Geodesy (eds S. W. Henriksen, A. Mancini and B. H. Chovitz), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM015p0217

Author Information

  1. New York University, University Heights, Bronx, New York 10453

Publication History

  1. Published Online: 15 MAR 2013
  2. Published Print: 1 JAN 1972

ISBN Information

Print ISBN: 9780875900155

Online ISBN: 9781118663646

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Keywords:

  • Apollo program;
  • Radar altimeter;
  • Skylab altimeter;
  • Southern oceans;
  • Wave variability

Summary

The average return echo power for the radar altimeter (S193) on Skylab will be beam limited, so that it will rise to peak return in 100 nsec and fall to nearly zero in about another 400 nsec once the altimeter has searched out the nadir direction. A split-gate tracking loop with the gates separated by 50 nsec will be used. The effects of varying wave height and wave spectra on the shape of the return pulse and on the measurement of the range are calculated in terms of a convolution involving the probability density function of the wave elevations and the shape of the radar signal. The assumptions made in the calculations have been verified by measurements made by others from aircraft and towers.