SGLI Channel Specification and Products

Channel Center Wavelength Band width IFOV
VNR, SWI: nm
TIR: µm
m
Visible and Near Infrared Radiometer
(SGLI-VNR)
Non-polarization Channel VN1 380 10 250*1
VN2 412 10
VN3 443 10
VN4 490 10
VN5 530 20
VN6 565 20
VN7 673.5 20
VN8 673.5 20
VN9 763 12 1000
VN10 868.5 20 250*1
VN11 868.5 20
Polarization Channel P1 673.5 20 1000
P2 868.5 20
Infrared Scanner
(SGLI-IRS)
SWI Channel SW1 1050 20 1000
SW2 1380 20
SW3 1630 200 250*1
SW4 2210 50 1000
TIR Channel T1 10.8*2 0.74*2 250*3
T2 12.0*2 0.74*2
  • *1:Possible to be reduced to 1km resolution over both polar and ocean regions except coastal region.
  • *2:Unit of TIR is micro-meter.
  • *3:Possible to be reduced to 500m/1km resolution over both polar and ocean regions except coastal region.
  • Ref(1): Figure of specification of the SGLI Relative Spectral Response (RSR)
  • Ref(2): Text data of the SGLI RSR specification models (high, low resolution)
  • Ref(3): Model equations of the SGLI RSR specification (prepared for EORC algorithm tests)

Spectral bands of SGLI are carefully designed to efficiently retrieve geophysical parameters that are essential for achieving the goals of the GCOM mission. As a result, the number of spectral bands has been reduces from GLI's 36 of GLI to 19, while the parameters to be retrieved as standard products have been increased from 22 to 29, with the enhancement of land aerosol and vegetation observation capabilities.

Spectral reflectances of several observation targets and the atmospheric transmittance. Locations and widths of the SGLI channels are shown in blue bars. Black dots indicate the channel to be directly used for the retrieval of each SGLI product.
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