LISS

1. Sensors and Their Specifications

S K Diwakar

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
Resolution
(m)
Swath
Width
(km)
Sensor
Channels
Spectral Bands
(µm)
Revisit
Time
72 148
LISS-I-1
LISS-I-2
LISS-I-3
LISS-I-4
0.45-0.52 (blue)
0.52-0.59 (green)
0.62-0.68 (red)
0.77-0.86 (near IR)
22

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
(µm)
Resolution
(m)
Swath
Width
(km)
Revisit
time
(days)
Band 1 (blue) 0.46 to
0.52
36.25
74
(145)
22
Band 2 (green) 0.52 to
0.59
36.25
74
(145)
22
Band 3 (red) 0.62 to
0.68
36.25
74
(145)
22
Band 4 (NIR) 0.77 to
0.86
36.25
74
(145)
22

2. Sensors and Their Specifications

S K Diwakar

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
(µm)
Resolution
(m)
Swath
Width
(km)
Revisit time
(days)
Band 1
(VIS)
0.52 to 0.59
23.5 142 5
Band 2
(VIS)
0.62 to 0.68
23.5 142 5
Band 3
(NIR)
0.77 to 0.86
23.5 142 5
Band 4
(SWIR)
1.55 to 1.7
70.5 148 5
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

Mode Band Spectral band Resolution
Number of
Array
Multispectral 2 0.52 – 0.59 µm 5.8 x 5.8 m
1

3 0.62 – 0.68 µm 5.8 x 5.8 m

4 0.77 – 0.86 µm 5.8 x 5.8 m