Lessons learned from the deficiencies in the design of the TT&C transponder for the small satellite for remote sensing Egyptsat-1
- Paper number
IAC-11,D1,5,8,x11656
- Author
Mr. Ahmed Maghawry, National Authority for Remote Sensing and Space Sciences (NARSS), Egypt
- Year
2011
- Abstract
Since the lost of communication with the Egyptian small satellite for remote sensing Egyptsat-1 in 19 July 2010, after almost 3 years of operation, many trails have been made to provide a technical justification for the underlying reasons (in which this data must be provided by the telemetry system via the transmitter of the TT&C transponder). The communication subsystem was designed with special communication link scenario which does not allow communication with the satellite in case of failure of the receiver of the TT&C transponder (i.e. the receiver and transmitter of TT&C transponder are not independent). This dependency does not allow communication between the satellite and the ground segment in case of failure of only the receiver of the TT&C transponder. This paper discusses the design of the TT&C transponder of Egypsat-1 and the deficiencies inherent in this design and its reflection on blocking any information about the satellite for purpose of at least documentation of failures and/or gathering information of the experimental platforms on-board satellite and provides suggestions for avoiding such deficiencies in the next generation small satellites TT&C transponders.
- Abstract document
- Manuscript document
(absent)