SLR+DORIS-based sp3 orbits for altimeter satellites from the NASA GSFC Analysis Center

The std2400 orbits are SLR+DORIS-based orbits for the TOPEX/Poseidon, Jason-1, Jason-2, Jason-3 and Sentinel-6A satellites computed by NASA/GSFC Analysis Center for IDS using the std2400 POD standards. These precise orbits are in the sp3 format and are available at IDS Data Centers. The conventions of the Copernicus POD group regarding the format of the sp3 files for these LEO satellites is applied. The satellite position field is written out with the format (4x,3f14.7). This provides extra precision for the position down to 0.1 mm for Low Earth Orbit (LEO) satellites.