SGLI

Second-generation Global Imager

Satellites

GCOM-C (3 satellites)

Status

Being designed – To be utilised in the period: 2014 to ~ 2027

Mission

Ocean colour, vegetation indexes, aerosol

Instrument type

19-channel radiometer, 17 narrow-bandwidth in VIR/NIR/SWIR and two broadband in the Thermal IR. Two channels with three polarisations, with along-track tilting capability of ± 45°

Scanning technique

VNIR: pushbroom; SWIR/TIR: whiskbroom Swath 1100 km Cross-track: 3 CCD of 2000 pixels each of 250 m s.s.p. (non polarimetric channels) and 1 CCD of 1000 pixels of 1 km s.s.p. (polarimetric channels)

Coverage/cycle

Global coverage in 3 days (in daylight)

Resolution (s.s.p.)

250 m to 1.0 km (see below)

Resources

Mass: … kg - Power: … W - Data rate: … Mbps

Central wavelength

Bandwidth

Radiometric accuracy (SNR or NEΔT) at specified NESR

IFOV at s.s.p.

380 nm

10 nm

….. @ 60 W m-2 sr-1 µm-1

250 m

412 nm

10 nm

….. @ 75 W m-2 sr-1 µm-1

250 m

443 nm

10 nm

….. @ 64 W m-2 sr-1 µm-1

250 m

490 nm

10 nm

….. @ 53 W m-2 sr-1 µm-1

250 m

530 nm

20 nm

….. @ 41 W m-2 sr-1 µm-1

250 m

565 nm

20 nm

….. @ 33 W m-2 sr-1 µm-1

250 m

670 nm

10 nm

….. @ 23 W m-2 sr-1 µm-1

250 m

670 nm

20 nm

.…. @ 25 W m-2 sr-1 µm-1

250 m

763 nm

8 nm

….. @ 40 W m-2 sr-1 µm-1

1000 m

865 nm

20 nm

…. @ 8 W m-2 sr-1 µm-1

250 m

865 nm

20 nm

….. @ 30 W m-2 sr-1 µm-1

250 m

670 nm 3 pol

20 nm

….. @ 25 W m-2 sr-1 µm-1

1000 m

865 nm 3 pol

20 nm

….. @ 30 W m-2 sr-1 µm-1

1000 m

1050 nm

20 nm

….. @ 57 W m-2 sr-1 µm-1

1000 m

1380 nm

20 nm

…. @ 8 W m-2 sr-1 µm-1

1000 m

1640 nm

200 nm

…. @ 3 W m-2 sr-1 µm-1

250 m

2210 nm

50 nm

……. @ 1.9 W m-2 sr-1 µm-11

1000 m

10.8 µm

0.7 µm

…. K @ 300 K

500 m

12.0 µm

0.7 µm

…. K @ 300 K

500 m