HIRAS-II

Description

HIRAS-II is the second generation of Hyperspectral Infrared Atmospheric Sounder (HIRAS).

Compared to HIRAS-I, HIRAS-II has firstly expanded to thermal infrared bands with more than 3,000 channels, has a finer spatial resolution from 16km to 14km, more than two times better sensitivity and significantly improved calibration accuracy.

Satellite	FY-3E, FY-3F, FY-3H
Number of Channels	3053
Spatial Resolution	14km
Swath Width	2300km

Characteristics

HIRAS-II onboard FY-3H as below.

Band	Wavelength	Spectral range	Spectral resolution
LW	15.38~8.6 µm	650~1160 cm^-1	0.625 cm^-1
MW 1	8.61~5.08 µm	1160.625~1965 cm^-1	0.625 cm^-1
MW 2	5.08~3.92 µm	1965.625~2550 cm^-1	0.625 cm^-1

HIRAS-II onboard FY-3E and FY-3F as below.

Band	Wavelength	Spectral range	Spectral resolution
LW IR	15.41~8.55 µm	648.75~1169.375 cm^-1	0.625 cm^-1
MW IR	8.56~5.20 µm	1167.5~1921.25 cm^-1	0.625 cm^-1
SW IR	5.21~3.92 µm	1919.375~2551.25 cm^-1	0.625 cm^-1