EVALUASI HASIL PEMODELAN BATIMETRI DARI TIGA KOMBINASI LIMA SATELIT ALTIMETRI PADA LAUTNATUNA DAN LAUT SULAWESI

Abstract

Indonesia is an archipelago country where 77% of its territory is
waters. National marine mapping has been carried out based on depth
measurement data obtained using echosounders. However, this method
requires a lot of time and cost. One solution to provide Indonesian
bathymetry data is by utilizing altimetry satellite data to model the
bathymetry of the seafloor. This study aims to evaluate bathymetric
model generated from three combinations of five altimetry satellites in
shallow and deep seas. We use least square collocation gravity anomaly
and geological gravity for bathymetry modeling. The results of the
model show variations in deviations with sounding data available at
the Geospatial Information Agency (BIG). The resulting residual trend
differs between shallow and deep sea. The optimum results in shallow
area is obtained by the combination of Cryosat-2, Jason-1/C, and
SARAL while in deep area is obtained by the combination of ERS-1/E-F
and Geosat GM. In general, the bathymetry model produced in this
study has a similar profile with the sounding data