FAQ
Q
GCOM-C/SGLI VNR-PL degradation correction
A
GCOM-C/SGLI sensor sensitivity degradations are monitored by on-orbit calibrations (lunar calibration, solar diffuser calibration and internal light source calibration).
Sensor sensitivity degradation corrections are applied to GCOM-C / SGLI Level 1B products as shown in the below table.
These corrections are applied to Level 1B(Ver.2) products of VNR-NP and IRS-SWIR.
Since the corrections aren't applied in Level 1B of VNR-PL,
IRS-TIR is every two-point calibration is automatically corrected for each scanning using the data obtained by observing the black body (high-temperature calibration source) and deep space (low-temperature calibration source).
Sensor sensitivity degradation corrections are applied to GCOM-C / SGLI Level 1B products as shown in the below table.
These corrections are applied to Level 1B(Ver.2) products of VNR-NP and IRS-SWIR.
Since the corrections aren't applied in Level 1B of VNR-PL,
IRS-TIR is every two-point calibration is automatically corrected for each scanning using the data obtained by observing the black body (high-temperature calibration source) and deep space (low-temperature calibration source).
Last update: 2021/03/05