Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.335..379i&link_type=abstract
Astrophysics and Space Science, Volume 335, Issue 2, pp.379-387
Astronomy and Astrophysics
Astrophysics
Satellite Laser Ranging, Helwan Slr-Station, Calibration, Data Analysis
Scientific paper
The satellites laser ranging from Helwan SLR station during the last 20 years are discussed. The internal calibration method used at the Helwan SLR station is explained. The root mean square value of the calibrations carried out during the period from 1991 to 2008 is computed. To clarify the difference in the accuracy of the measurements, the results of the analysis of the data taken for all the satellites after the upgrading (2000) are given and compared with those of the satellites observed before the upgrading (1996). The total number of passes of the satellite observed during the period from 1991 to 2008 is presented and the results are compared with the other SLR stations.
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