Register Login Password forgotten?

Products

Station Coordinates and Earth Orientation Parameters (EOPs)

This product contains the solutions for station coordinates and Earth Orientation Parameters (EOPs) daily produced by the ILRS Analysis Centers and Combination Centers. These are ILRS loosely constrained solutions (i.e. their reference frame has an arbitrary orientation) for station coordinates (valid for the mid-point of each 7-day interval) and EOPs (x-pole, y-pole and Length-Of-Day--LOD, for 1-day intervals) computed using the data collected over the past 7 days.

The daily production started in May 2012. The operational solutions before May 2012 were generated once a week.

These results are stored in subdirectories "YYMMDD", where "YYMMDD" is the date (YY=2 digit year, MM=2 digit month, and DD=2 digit day) of the end of each 7-day interval. Within each subdirectory, one finds the two combined solution and the relative summary files. The naming convention is reported in ftp://cddis.gsfc.nasa.gov/slr/products/00readme More information on the ILRS products can be found at:

For more information and/or suggestions, please contact the CDDIS/EDC Data Center representatives (Carey Noll, carey.noll@nasa.gov and Christian Schwatke, christian.schwatke@tum.de) or the ILRS Analysis representatives, Erricos C. Pavlis and Cinzia Luceri .

Data Access

Orbits for Lageos-1/-2 and Etalon-1/-2

This product contains the satellite state vectors produced weekly by the ILRS Analysis Centers and Combination Centers for the two LAGEOS and the two ETALON satellites. Their are computed using the data collected over the past 7 days and their reference frame is the Earth Centered - Earth Fixed (ECEF) realized by SLRF2008 and the IERS Bulletin A EOP series (USNO). Modeling information on the individual "xxx" AC is detailed in the corresponding README_AC.xxx files

These results are archived in subdirectories "sat"/"YYMMDD", where "sat" is the satellite (lageos1, lageos2, etalon1, etalon2) and "YYMMDD" is the date (YY=2 digit year, MM=2 digit month, and DD=2 digit day) of the end of each 7-day interval spanned by the orbit. Within each subdirectory you will find the two combined solutions and the corresponding summary files.

The naming convention is explained in:

More information on the ILRS products can be found at:

For more information and/or suggestions, please contact the CDDIS/EDC Data Center representatives (Carey Noll, carey.noll@nasa.gov and Christian Schwatke, christian.schwatke@tum.de) or the ILRS Analysis representatives, Erricos C. Pavlis and Cinzia Luceri .

Data Access