Automated verification of spacecraft auxiliary data

Abstract

ISRO programmes are realizing 8 to 10 spacecrafts a year. The complexity of the spacecraft is increasing in each of geostationary, IRS and interplanetary missions, leading to increase in computational load of the onboard computer. Hence there is a need for quick testing and analysis of various spacecrafts. The attitude and orbit control electronics system receives data from various sensors and does the processing and maintains the spacecraft in station by generating control signals for actuators. It has various subsystems which interact with it. In addition to this package there is data handling remote terminal package which is implemented to provide other interfaces like star sensor, satellite positioning system, solid state recorder, baseband data handling and many more. These systems communicate with attitude and orbit control electronics through MIL-STD-1553 Bus. This paper explains the methodology developed for the analysis of this spacecraft baseband data handling auxiliary data. This analysis helps for both internal logic verification and external component interface. The actual results are recorded for further analysis and reports are generated.