BackForward Satellite: ACE 

Satellite details
Acronym ACE
Full name Advanced Composition Explorer
WIGOS Station Identifier ---
Satellite Description
  • Single flight unit of the ACE programme.
  • Main missions; solar physics and Space weather.
Mass at launch 785 kg Dry mass 596 kg
Power 443 W
Data access link
Data access information
  • Data available from the Space Radiation Laboratory of Caltech, Pasadena, CA.
Orbit Lagrange libration point 1 Altitude 1.5e+06 km


Space agency NASA
Status Operational
Details on Status
(as available)
  • Multiple ADC converters are failing.
  • Back-up to DSCOVR since 27 July 2016.
Launch 25 Aug 1997 EOL ≥2027
Last update: 2024-05-02
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on ACE

Acronym Full name
SWIMS Solar Wind Ion Mass Spectrometer
SWICS Solar Wind Ion Composition Spectrometer
ULEIS Ultra-Low Energy Isotope Spectrometer
SEPICA Solar Energetic Particle Ionic Charge Analyzer
SWEPAM Solar Wind Electron, Proton, and Alpha Monitor
MAG Magnetic Field Monitor
SIS Solar Isotope Spectrometer
CRIS Cosmic Ray Isotope Spectrometer
EPAM Electron, Proton, and Alpha-particle Monitor
Show instrument status and calibration