LEGRI Science Operation Center. Architecture and operations

The LEGRI Science Operation Center (SOC) is the single contact point betwee n the MINISAT-01 Centro de Operaciones Cientificas (COC) located at Villafr anca del Castillo (Madrid) and the LEGRI Consortium. Its architecture, oper ational procedures and associated software has been developed at the Univer sities of Valencia and Birmingham on the scope to define a integrated Data Analysis System, able to perform the daily follow-up of the instrument heal th, raw data files decompression and archiving activities (on-line and hist orical). Pointing and telecommand files generation is also a SOC responsibi lity. The aim of this paper is to report the SOC activities during the two years of LEGRI operations. Conclusions about the SOC architecture and proce dures evolution on how to handle the operations for space-borne instrumenta tion, are also presented. Special attention has been paid to the operative evaluation of the pointing reconstruction solutions from the MINISAT-01 Att itude Control System by comparing them with those obtained with the LEGRI S tar Sensor. The analysis of one year of observations shows the good agreeme nt between both sets of data. No systematic deviations have been found with an averaged standard deviation of 1 degree in alpha and delta coordinates. For most of the time the MINISAT pointing system is working slightly bette r than expected and within specifications.