BackForwardInstrument:  STAR 

Instrument details
Acronym STAR
Full name Space Three-axis Accelerometer for Research mission
Purpose Solid Earth - Observation of the Earth’s gravity field along the orbit
Short description 3-axis accelerometer
Background Part of a package of instruments for Solid Earth and Space Weather observation
Scanning Technique N/A
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate


Providing Agency DLR
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2000 to 2010
Last update: 2012-07-13
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 No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • Gravity field
  • Gravity gradients
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