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 1996-11-14
Last update: 2018-06-14
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
Opportunity objectives
  • Geoid
  • Gravity field
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Tentative 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
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