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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, Vol. 22, No. 2, pp. 53-67

Determination of parametric model coefficients of sea state bias correction using altimetry measurements of the GEO-IK-2 space geodetic system

S.A. Lebedev 1, 2, 3 , I.V. Gusev 4 , A.V. Sakovich 4 , A.O. Slobodyanyuk 3 
1 Geophysical Center RAS, Moscow, Russia
2 Maykop State Technological University, Maykop, Russia
3 National Research University of Electronic Technology, Zelenograd, Moscow, Russia
4 AO Central Research Institute for Machine Building, Korolev, Moscow Region, Russia
Accepted: 17.03.2025
DOI: 10.21046/2070-7401-2025-22-2-53-67
In the work, two methods for calculating the coefficients of the sea state bias (SSB) correction model are compared. The first method, currently adopted for calculating the SSB correction for all spacecrafts, is based on analysis of geophysical parameters at the intersection points of the ascending and descending tracks of the spacecraft, whereas the second one employs analysis at the nearest points of the iso-route tracks of the spacecraft. According to these methods, the least squares method has been used to calculate 8 sets of coefficients for the World Ocean and the Black Sea using measurements of spacecraft No. 12L of the GEO-IK-2 space geodetic system for 2018 and 2019. The distribution density of measurements was analyzed for two parameters: significant wave height and surface wind speed. The results obtained allow us to make an assumption about different wind-wave regimes in the World Ocean and inland seas. The calculated coefficients are planned to be used in algorithms for processing satellite altimetry information of GEO-IK-2.
Keywords: space geodetic system GEO-IK-2, sea state bias correction, sea state bias, satellite altimetry
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