BackForwardInstrument:  IRS (SJ-9) 

Instrument details
Acronym IRS (SJ-9)
Full name Infrared scanner
Purpose High resolution land observation
Short description Single channel TIR radiometer in the range 8-12 μm
Background New development
Scanning Technique Pushbroom, swath 18 km
Resolution 73 m at s.s.p.
Coverage / Cycle Global coverage in 2.5 months
Mass Power Data Rate

 

Providing Agency CAST
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2013 to 2022
Last update: 2022-07-25
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
  • Passive optical radiometer or spectrometer
  • High resolution optical imager
WIGOS Subcomponents
  • Subcomponent 4
  • GNSS radio occultation (commercial)
  • High-resolution optical observation constellation (commercial)
Mission objectives
Primary mission objectives
  • Fire fractional cover
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
Cloud cover5 - marginalInfrequent coverage.TIR window channel(s) around 11 micrometers
Cloud top temperature5 - marginalInfrequent coverage.TIR window channel(s) around 11 micrometers
Fire fractional cover*2 - very highCloud sensitive.. Infrequent coverage.TIR window channel(s) around 11 micrometers
Fire radiative power5 - marginalCloud sensitive.. Infrequent coverage.TIR window channel(s) around 11 micrometers
Fire temperature5 - marginalCloud sensitive.. Infrequent coverage.TIR window channel(s) around 11 micrometers
Sea surface temperature5 - marginalCloud sensitive.. Infrequent coverage.TIR window channel(s)