A Generalized Semi-Analytical model for delay/Doppler altimetry

Abderrahim Halimi (1) , Corinne Mailhes (1, 2) , Jean-Yves Tourneret (3, 2) , François Boy (4) , Thomas Moreau (4)

1 IRIT-SC - Signal et Communications
2 Toulouse INP - Institut National Polytechnique (Toulouse)
3 IRIT-MINDS - CoMputational imagINg anD viSion
4 CNES - Centre National d'Études Spatiales [Toulouse]

This paper introduces a new model for delay/Doppler altimetry, taking into account the effect of antenna mispointing. After defining the proposed model, the effect of the antenna mispointing on the altimetric waveform is analyzed as a function of along-track and across-track angles. Two least squares approaches are investigated for estimating the parameters associated with the proposed model. The first algorithm estimates four parameters including the across-track mispointing (which affects the echo's shape). The second algorithm uses the mispointing angles provided by the star-trackers and estimates the three remaining parameters. The proposed model and algorithms are validated via simulations conducted on both synthetic and real data.

Mots clés: Delay/Doppler altimetry; Cryosat-2; Antenna mispointing; Least squares estimation

Domaines: Synthèse d'image et réalité virtuelle [cs.GR]; Traitement du signal et de l'image [eess.SP]; Traitement des images [eess.IV]; Vision par ordinateur et reconnaissance de formes [cs.CV]; Intelligence artificielle [cs.AI]

Abderrahim Halimi, Corinne Mailhes, Jean-Yves Tourneret, François Boy, Thomas Moreau. A Generalized Semi-Analytical model for delay/Doppler altimetry. International Geoscience & Remote Sensing Symposium - IGARSS 2014, Jul 2014, Quebec, Canada. pp. 5126-5129. ⟨hal-01147249⟩