Title :
Telemetry and command subsystem for a Mexican experimental microsatellite
Author :
Pacheco, Enrique ; Medina, José Luis ; Conte, Roberto ; Mendieta, Javier
Author_Institution :
CICESE Res. Center, San Diego, CA, USA
Abstract :
A telemetry and command subsystem developed in Mexico is presented. The goal of this project is the design, construction, implementation and testing of a RF subsystem to be used on a digital communication link at 148 MHz (VHF band, uplink) and 400 MHz (UHF band, downlink), for the SATEX I microsatellite. The whole system consists of transmitter-receiver equipment for the satellite and its counterpart equipment for the master Earth station. The system also includes a minimal computation subsystem, which acts as a backup in case both the main and redundant onboard computers fail, generating a survival communications mode. Both terrestrial and space segments have an active (hot standby) 2:1 redundancy. A description of the developed prototype and its details are presented
Keywords :
digital communication; redundancy; satellite ground stations; satellite links; satellite telemetry; space vehicle electronics; telecommunication computing; telecommunication control; telecontrol; 148 MHz; 400 MHz; LEO microsatellite; Mexican experimental microsatellite; RF subsystem; SATEX I microsatellite; UHF band; VHF band; active redundancy; digital communication link; implementation; master Earth station; minimal computation subsystem; modem; redundant onboard computers; remote control signals; survival communications mode; telemetry and command subsystem; transmitter-receiver equipment; Earth; Instruments; Postal services; Radio frequency; Satellite ground stations; Space missions; Space technology; Space vehicles; Telemetry; Testing;
Conference_Titel :
Aerospace Conference, 2001, IEEE Proceedings.
Conference_Location :
Big Sky, MT
Print_ISBN :
0-7803-6599-2
DOI :
10.1109/AERO.2001.931346
