A method for evaluating LAPAN-A3/IPB operation based on raw data telemetry

摘要

LAPAN-A3/IPB operated in Nadir Pointing Mode as normal mode. Maneuvers are carried out to maintain attitude atnadir or to change satellite’s attitude to aim at the target in Target Pointing Mode. The attitude of the satellite whencarry out the mission must be as close as possible to the target’s attitude parameter in order to get accurate and goodquality satellite image. When the attitude of the satellite is not the same as the target, a difference will be created andthis should be evaluated regularly. Historical data on satellite attitude differences and other satellite operatingparameters are stored in a telemetry logfile data. There are two types of logfiles, logfile-client and logfile-server. So far,logfile-client is used to evaluate satellite operations, but the logfiles are vulnerable to formatting changes, so morereliable logfile is needed, the logfile-server is suitable because there are no changes in formatting. Logfile-servers areraw data telemetry that are issued directly from satellites without any data processing, so processing data directly fromthe logfile-server will produce more reliable results. This paper will discuss a method for evaluating satellite operationsby processing raw data telemetry from the logfile-server. Using the method, based on March-August 2019 telemetrydata, the attitude performance of LAPAN-A3/IPB satellite show positive trend. Yaw, pitch, and roll value, as attitudeparameter, the majority are in the range of 0~O until 1~O.