BackForwardInstrument:  DORIS 

Instrument details
Acronym DORIS
Full name Doppler Orbitography and Radiopositioning Integrated by Satellite
Purpose Precision orbitography
Short description Measuring Doppler shift of signals from ground stations. Frequencies 2 GHz and (auxiliary) 401 MHz
Background First flown on SPOT-2 and SPOT-3
Scanning Technique N/A
Resolution N/A
Coverage / Cycle N/A
Mass 91 kg Power 42 W Data Rate 16.7 kbps


Providing Agency CNES
Instrument Maturity Flown on operational programme
Utilization Period: 1990 to 2037
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
  • Positioning system
WIGOS Subcomponents No WIGOS subcomponents have been defined.
Mission objectives
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
Geoid4 - fairHighly indirect.. Ground stations network needed.Opportunity information from radio-positioning system used for precise orbit determination
Gravity field3 - highHighly indirect.Opportunity information from radio-positioning system used for precise orbit determination