BackForwardInstrument:  PRARE 

Instrument details
Acronym PRARE
Full name Precise Range And Range-rate Equipment
Purpose Solid Earth - Precision orbitography
Short description Measuring differential signals from a ground stations network. Frequencies 2.2 GHz and 8.5 GHz
Background On its first flight, on ERS-1 (1991), the instrument failed soon
Scanning Technique N/A
Resolution N/A
Coverage / Cycle N/A
Mass 19 kg Power 30 W Data Rate N/A


Providing Agency DLR
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1991 to 1991
Last update: 2017-03-31
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