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 2007
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
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