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Status of GPS/AMS project Agnieszka Jacholkowska Groupe d’Astroparticules de Montpellier

Status of GPS/AMS project Agnieszka Jacholkowska Groupe d’Astroparticules de Montpellier.  latest 2004 activities  TOPSTAR 3000 2 nd generation. GPS in orbit. GEO. GPS (20 000km). LEO. Earth. Provides Position / Velocity / Time on bord with no intervention from ground

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Status of GPS/AMS project Agnieszka Jacholkowska Groupe d’Astroparticules de Montpellier

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  1. Status of GPS/AMS project Agnieszka Jacholkowska Groupe d’Astroparticules de Montpellier  latest 2004 activities  TOPSTAR 3000 2nd generation A. Jacholkowska, AMS TIM

  2. GPS in orbit GEO GPS (20 000km) LEO Earth • Provides Position / Velocity / Time on bord with no intervention from ground • Provides UTC time • Precision 10m / 1cms-1 / 1s AMS02 A. Jacholkowska, AMS TIM

  3. GPS project  latest 2004 activities: - June 04 (Toulouse) : visit to Alcatel-Space, discussion on production of TOPSTAR 3000 1st generation proposal of a 2nd generation TOPSTAR 3000 to be launched end 2005 on ESA PROBA2 satellite - December 04 (Toulouse) : training at CNES Centre work on measurements on ground by Claude Zurbach – GAM software engineer who will take care of AMS-Alcatel relation and will contribute to the GPS implementation in AMS A. Jacholkowska, AMS TIM

  4. TOPSTAR 3000D – design TOPSTAR 3000 design based on a GPS Core and optional modules GPS Core integrates HW and SW for GPS processing and navigation : • RF/IF board • Processing Unit board • Processing software Optional modules enable adaptation to mission requirements : • DC/DC converter (21-50V unregulated bus) • High-class clock (OCXO with 10-9 s/s stability) • MIL-STD-1553B interface GPS Core 276 x 42 x 170 mm3 1.5 kg 2-8 W 4 antennas can be connected A. Jacholkowska, AMS TIM

  5. GPS – 1st generation RF IF 32-bit processor memory Baseband chip GPS L1 I/O interface RS422 10 MHz 1553B interface 1553B OCXO DC/DC converter Primary power bus (22V - 52V) A. Jacholkowska, AMS TIM

  6. GPS – 2nd generation • Improvements of TOPSTAR 3000 • Mass reduction and volume (2 RF gates, mixed architecture, technological integration) • Consumption reduction (stand-by mode with consumption  0.) • Maintenance of multi-application compatibility • Compatibility PF LEO et CU • Compatibility with GEO • Compatibility with determination of attitude • Major evolutions • Compatibility in bi-frequency L1-C/A & L2CS • Compatibility in reception of signals in GEO navigation A. Jacholkowska, AMS TIM

  7. GPS – 2nd generation • Section RF/IF • 2 gates RF/IF, configurable L1/L1 or L1/L2 or L1/Lp • techno integration (MCM integrating preamps and filters SAW-RF) • Numerical treatment of the signal • modification of ASIC treatment for compatibility with L2CS. • modification of the software treatment of attitude. • Processor et interface • development of a new processor card based on ERC32 monochip, and associated software. • development of new ASIC for I/O, integrating 1553B interface. • Power supply • development of a new module, based on MCM technology (Alcate)l A. Jacholkowska, AMS TIM

  8. GPS – 2nd generation RF IF OCXO or TCXO 32-bit processor memory Baseband chip (C/A CM CL) RF1 RF2 I/O interface RS422 1553 RF1 = L1 RF2 = L1, L2, Lp DC/DC converter Power bus A. Jacholkowska, AMS TIM

  9. GPS – 2nd generation • Budget • GPS Core Configuration : 1.0 kg - 6 W (L1/L2, TCXO, RS422) • Complete Configuration : 1.5 kg - 11W (L1/L2, OCXO, 1553B, DC/DC) A. Jacholkowska, AMS TIM

  10. GPS – summary - Alcatel-Space proposes a 2nd generation TOPSTAR 3000 GPS which will equip most of the future ESA/CNES -satellites and LISA project (price not yet known, but 1st generation price not guaranteed) - 1st generation TOPSTAR 3000 :  is in the Thermal CDR simulations  documentation for the implementation in AMS DAQ has been provided to the collaboration A. Jacholkowska, AMS TIM

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