BackForwardInstrument:  ACC 

Instrument details
Acronym ACC
Full name Accelerometer
Purpose Observation of the gravity field along the orbit
Short description Accelerometer to observe the gravity field along the orbit
Background Part of a package of instruments for Solid Earth and Space Weather observation. Instrument developed in the Czech Republic.
Scanning Technique Formation flight of 3 satellites in coordinated orbits for 3-D field reconstruction
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate


Providing Agency ESA
Instrument Maturity Backed by strong heritage
Utilization Period: 2014 to 2025
Last update: 2023-02-08
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Other payload component
  • Gravity sensing system
WIGOS Subcomponents
  • Subcomponent 1
  • Gravimetry missions
  • Gravitometry sensing system
Mission objectives
Primary mission objectives
  • Gravity field
  • Gravity gradients
  • Ground water
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Geoid3 - highHighly indirect.Accelerometer to reconstruct the Earth's gravity field, hence the geoid
Gravity field*2 - very highAssimilation in gravity model needed.Accelerometer to reconstruct the Earth's gravity field
Gravity gradients*3 - highAssimilation in gravity model needed.Accelerometer/gradiometer to reconstruct the Earth's gravity field
Atmospheric density5 - marginalNo specific limitation.Accelerometer/gradiometer. Atmospheric density measured as one of the perturbations of accelerometer records due to atmospheric drag