BackForwardInstrument:  ILAS-I 

Instrument details
Acronym ILAS-I
Full name Improved Limb Atmosperic Spectrometer - I
Purpose Atmospheric chemistry. Species: CH4, CFC11, H2O, HNO3, N2O, NO2, O3 and aerosol
Short description Two grating spectrometers: one in the IR range 6.21-11.77 µm (850-1610 cm-1) with spectral resolution 0.2 cm-1; the other one with 1024 NIR channels in the range 0.753-0.784 µm
Background New development
Scanning Technique Limb sounding by sun occultation. Simultaneous vertical scanning by linear array detectors. About 30 occultations/day
Resolution Vertical: 2 km in the volume 10-60 km; horizontal: 300 km along-view
Coverage / Cycle Latitudinal zones 56-70 ºN and 63-88 ºS, once each 3 days
Mass 130 kg Power 78 W Data Rate 517 kbps

 

Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1996 to 1997
Last update: 2017-03-29
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
Primary mission objectives
  • C2H2
  • C2H6
  • CFC-11
  • CFC-12
  • CH4 mole fraction
  • CO2 mole fraction
  • COS
  • H2O
  • HNO3
  • N2O mole fraction
  • NO2
  • O3
  • PAN
  • SF6
  • SO2
Evaluation of Measurements