SAC-C

Lanzado en 2000, se mantiene actualmente en buen funcionamiento, a pesar de que se le estimaba un tiempo de vida de tan solo 4 años. Se trata de un satélite de observación de la superficie terrestre, de 485 kg de peso. Tiene como misión el monitoreo del ambiente y de catástrofes naturales. Los países asociados a esta misión son: Estados Unidos, Italia, Dinamarca, Francia y Brasil.

Technical Description

Technical Description

The SAC-C was designed for a minimum average life of four years.

The total mass is 485 kg, including 12.5 kg of hydrazine.

The SAC-C is a three-axis stabilized platform geared towards Earth. The pointing accuracy is 0.2 degrees, pointing stability is 0.003 degrees / sec and precision pointing knowledge is 70 arcseconds (3sigmas) in all three axes.

Orbits characteristics are:

  • Height 707 km
  • Inclination 98.2 º
  • Orbit error + / -10 km EOL.
  • Revisit 9 days

The magnetic cleanliness achieved at 8 m is better than 1 nT (a scalar magnetometer distance) required to have a valid magnetic cleanliness for the mission.

The major satellite subsystems are:

  • Structure and Thermal Management
  • Command and Management of Data
  • Control Attitude and Orbit Control
  • Power
  • Communications (RF)