BackForwardInstrument:  NIRST 

Instrument details
Acronym NIRST
Full name New Infra Red Scanner Technology
Purpose Imagery of hot scenes. Also sea-surface temperature
Short description 3-channel IR radiometer [see detailed characteristics below]
Background New development
Scanning Technique Pushbroom; swath 182 km possibile to be offset by ± 30° within a field of regard of 1060 km
Resolution 350 m IFOV
Coverage / Cycle Global coverage in one week (less by exploiting strategic pointing)
Mass Power Data Rate

 

Providing Agency CONAE
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2011-08-25 to 2015-06-07
Last update: 2012-09-11
Detailed characteristics
Central wavelength Spectral interval NEΔT @ specified scene temperature
3.80 µm 3.4 - 4.2 µm 0.5 K @ 400 K
10.85 µm 10.4 - 11.3 µm 0.3 K @ 300 K
11.85 µm 11.4 - 12.3 µm 0.4 K @ 300 K
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
Mission objectives
Primary mission objectives
  • Fire fractional cover
  • Fire temperature
  • Land surface temperature
  • Sea surface temperature
Secondary mission objectives
  • Fire radiative power
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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
Cloud cover4 - fairInfrequent coverage.MWIR and TIR window channels around 3.7 and 11 micrometers
Cloud top height4 - fairInfrequent coverage.TIR window channels around 11 micrometers to estimate cloud top height from its temperature
Cloud top temperature4 - fairInfrequent coverage.TIR window channels around 11 micrometers
Cloud type4 - fairInfrequent coverage.MWIR and TIR window channels around 3.7 and 11 micrometers
Fire fractional cover1 - primaryInfrequent coverage.. Cloud sensitive.. Daylight only.MWIR and TIR window channels around 3.7 and 11 micrometers
Fire radiative power1 - primaryCloud sensitive.. Infrequent coverage.MWIR and TIR window channels around 3.7 and 11 micrometers
Fire temperature1 - primaryCloud sensitive.. Infrequent coverage.MWIR and TIR window channels around 3.7 and 11 micrometers
Land surface temperature3 - highCloud sensitive.. Infrequent coverage.MWIR and TIR window channels around 3.7 and 11 micrometers (high sensitivity to high temperature, cloud impact reduction, water vapour correction)
Sea surface temperature2 - very highCloud sensitive.. Infrequent coverage.MWIR and TIR window channels (cloud impact reduction, water vapour correction)
Integrated Water Vapour (IWV)4 - fairCloud sensitive.. Low troposphere dominant.. Infrequent coverage.TIR channels in the 11 micrometers split window