Satellite Altimetry Gravity Data

The satellite geodesy research group at scripps institution of oceanography university of california san diego studies data collected by radar altimetry and synthetic aperture radar and applies it to geophysical problems.

Satellite altimetry gravity data. Altimetric gravity field accurate to about 3 5 mgal 1σ can be estimated while the combination of multi satellite data provides greater resolution but does not manage to improve the final accuracy of the solutions. Bathymetry is measurement of the depth of the ocean. An altimeter measures how high something is. The satellite altimetry data from cryosat 2 is being provided by esa while data from the jason 1 mission was provided by the national aeronautics and space administration nasa and the centre national d études spatiales cnes.

Satellite altimetry is a technique for measuring sea surface heights from a satellite orbit using a microwave radar altimeter. Khan s tscherning c. Improved gravity anomaly fields from retracked multimission satellite radar altimetry observations over the persian gulf and the caspian sea. Determination of semi diurnal ocean tide loading constituents using gps in alaska.

In the 1970s th e expression of gravitational potential in freque ncy domain was deduced in deta il a frequency domain. Satellite radar altimeters measure the ocean surface height sea level by measuring the time it takes a radar pulse to make a round trip from the satellite to the sea surface and back. This technique has brought about a revolution in the study of marine gravity fields and then in the oceanographic studies. In this study 1 the original satellite altimetry data are processed to infer the vertical deflection and gravity anomaly 2 the chinese coastal marine geoids cmg are determined by using the different methods including molodensky least square collocation stokes formula and two dimensional fast fourier transformation fft with the vertical deflection and gravity anomaly data 3 cmg are evaluated by using the results from above different methods the gravity field and steady state ocean circulation explorer goce gravity potential model ggpm and sal.

Topography by using satellite altimetry gravity data 8 9. Combining gm satellite altimetry and shipborne gravimetry data and b the fft method directly inverting the gm satellite sshs. Envisat esa ers 1 2 esa and geosat us navy.