Payload / Repeater Module
The Inmarsat extended L- band (XL) payload will support advanced geomobile communications and augment Inmarsat's Broadband Global Area Network (BGAN) service with its coverage centred over Africa and providing additional coverage to Europe, the Middle-East and parts of Asia.
Development of the Inmarsat operational payload equipments is progressing well. For the vast majority of the equipments targeted for the Payload, Equipment qualification models (EQM) testing is complete and about 75% of the payload equipment is either already delivered or being shipped to Portsmouth for integration on North and South Half Repeater Module structures.
Despite the good progress, significant challenges still remain related to the development of the critical elements: the Integrated Processor, the Calibration and Frequency Generator Units.
The Payload Repeater Module is planned to be shipped to Astrium Toulouse in December 2010.
Technology Demonstration Payloads
The Technology Demonstration Payloads (TDPs) consist of:
TDP1: an Advanced Laser Communication Terminal to demonstrate GEO to LEO communication links at 1064nm (supplied as customer furnished item by DLR):
TDP5: a Q-V Band communications experiment to assess the feasibility of these bands for future commercial applications
TDP6: an Advanced Star Tracker with active pixel detector
TDP8: an Environment effects facility to monitor the GEO radiation environment and its effects on electronic components and sensors
The development of the TDPs is progressing well with flight hardware being manufactured and tested. Each TDP development offers unique challenges but all are progressing towards the successful embarkation on the Alphasat satellite.