BackForwardInstrument:  HALOE 

Instrument details
Acronym HALOE
Full name Halogen Occultation Experiment
Purpose Chemistry in the upper atmosphere. Observed species: CH4, H2O, HCl, HF, NO, NO2 and O3
Short description Pressure-modulated correlation spectrometer with eight channels in the range 2.43-10.25 µm. Spectral resolution about 3 nm for SWIR, 5 cm-1 for MWIR and TIR
Background New concept
Scanning Technique Limb sounding by sun occultation. About 28 occultation/day referring to 14 different longitudes
Resolution Vertical: 1.6 km. Horizontal: about 300 km along-view
Coverage / Cycle 28 occultation/day referring to 14 different longitudes. High latitudes
Mass 101 kg Power Data Rate 4 kbps


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1991 to 2005
Last update: 2017-01-17
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
  • Earth observation instrument
  • Limb sounders
  • Limb sounder
WIGOS Subcomponents
  • Subcomponent 2
  • UV/VIS/NIR/IR/MW limb sounders
  • UV/VIS/NIR/IR occultation limb sounder
Mission objectives
No mission objectives have been defined.
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.

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Note: * Primary mission objective.