BackForwardInstrument:  HAIRS 

Instrument details
Acronym HAIRS
Full name High Accuracy Inter-satellite Ranging System
Purpose Solid Earth - Observation of the gravity field along the orbit
Short description Two-frequency ranging, in K-band (24 GHz) and Ka-band (32 GHz)
Background New development
Scanning Technique N/A
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate

 

Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2002 to ≥2023
Last update: 2012-06-28
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
Mission objectives
Primary mission objectives
  • Gravity field
  • Gravity gradients
Secondary mission objectives
  • Geoid
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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
Geoid3 - highHighly indirect.Multi-satellite system to reconstruct the Earth's gravity field, hence the geoid
Gravity field1 - primaryAssimilation in gravity model needed.Multi-satellite system to reconstruct the Earth's gravity field
Gravity gradients1 - primaryAssimilation in gravity model needed.Satellite-to-satellite tracking system to reconstruct the Earth's gravity field