THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - VIRS -
Full Name Visible Infra-red Scanner Status No longer operational
Instrument Agencies NASA Maturity
Instrument Type Imaging multi-spectral radiometers (vis/IR) Geometry Cross-track scanning
Instrument Technology Multi-purpose imaging Vis/IR radiometer Sampling Imaging
Data Access Open Access Data Format HDF
Measurements and Applications Data to be used in conjunction with data from CERES instrument to determine cloud radiation. Will enable 'calibration' of precipitation indices derived from other satellite sources.
Resolution Summary 2 km at nadir
[Best Resolution: 2000m]
Swath Summary 720 km
Accuracy Summary
Waveband Summary VIS: 0.63 µm, SWIR - MWIR: 1.6 µm and 3.75 µm, TIR: 10.8 µm and 12 µm
VIS (~0.40 µm - ~0.75 µm)
SWIR (~1.3 µm - ~3.0 µm)
MWIR (~3.0 µm - ~6.0 µm)
TIR (~6.0 µm - ~15.0 µm)
Instrument Measurements
CategoryParameterAccuracy
Cloud type, amount and cloud top temperatureCloud type 
Multi-purpose imagery (ocean)Ocean imagery and water leaving radiance 
Radiation budgetUpwelling (Outgoing) long-wave radiation at TOA 
Instrument Missions
TRMM - Tropical Rainfall Measuring Mission (1997 - 2015)
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