1. Sensors and Their Specifications
Linear Imaging Self-Scanning System I (LISS-I)
LISS-I (Linear Imaging self Scanner) was a payload for the IRS-1A satellite.
This camera operated in four spectral bands. It operated in a push-broom
scanning mode using a CCD array. Each band used 2 CCD's which were
staggered in the focal plane. It was again used in IRS-1B. It used 7 bit
quantization, and had a swath of 148 Kms. Images of LISS-I were extensively
used in forestry, crop acreage, yeild estimation, drought monitoring, flood
monitoring etc.
Band Details
Swath
Resolution Sensor Spectral Bands Revisit
Width
(m) Channels (µm) Time
(km)
LISS-I-1 0.45-0.52 (blue)
LISS-I-2 0.52-0.59 (green)
72 148 22
LISS-I-3 0.62-0.68 (red)
LISS-I-4 0.77-0.86 (near IR)
LISS-II was similar to LISS-I, but with higher spatial resolution and smaller
swath. it was on payload in three satellites : IRS-1A, IRS-1B, IRS-P2.
Band Wavelength Resolution Swath Revisit
(µm) (m) Width time
(km) (days)
Band 1 (blue) 0.46 to 74
36.25 22
0.52 (145)
Band 2 (green) 0.52 to 74
36.25 22
0.59 (145)
Band 3 (red) 0.62 to 74
36.25 22
0.68 (145)
Band 4 (NIR) 0.77 to 74
36.25 22
0.86 (145)
S K Diwakar

2. Sensors and Their Specifications
LISS-III
The LISS-III (Linear Imaging Self Scanning Sensor) sensor is an optical sensor
working in four spectral bands (green, red, near infrared and short wave
infrared). It covers a 141km-wide swath with a resolution of 23 meters in all
spectral bands.
Band Wavelength Resolution Swath Revisit time
(µm) (m) Width (days)
(km)
Band 1 0.52 to 0.59
23.5 142 5
(VIS)
Band 2 0.62 to 0.68
23.5 142 5
(VIS)
Band 3 0.77 to 0.86
23.5 142 5
(NIR)
Band 4 1.55 to 1.7
70.5 148 5
(SWIR)
LISS-IV sensor
LISS-IV can work either in panchromatic or in multispectral mode with the
same bands as LISS-III (except SWIR). However, the resolution is much
better (5.8 m). For Resourcesat-1, the swath width varies from 23.9 km in
multispectral mode to 70.3 km in panchromatic mode. For Resourcesat-2,
the multispectral swath is enhanced to 70 km. The linear array sensor can
be steered up to 26 degrees across-track, enabling stereoscopic imaging.
Mode Spectral band Resolution Number of Array
Panchromatic 0.50 – 0.75 µm 58 x 5.8 m 3
Number of
Mode Band Spectral band Resolution
Array
Multispectral 2 0.52 – 0.59 µm 5.8 x 5.8 m
3 0.62 – 0.68 µm 5.8 x 5.8 m 1
4 0.77 – 0.86 µm 5.8 x 5.8 m
S K Diwakar