WMO OSCAR | Details for Instrument LISS-4

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Instrument: LISS-4

Instrument details

Acronym	LISS-4
Full name	Linear Imaging Self-Scanning Sensor - 4
Purpose	Very-high-resolution land and vegetation observation
Short description	3-channel VIS/NIR radiometer, one camera each channel [see detailed characteristic below]
Background	Complementary to LISS-3 on ResourceSat-1 and ResourceSat-2
Scanning Technique	Pushbroom, 4096 pixel/line per camera; swath 23.9 km if the 3 cameras are used each for 1 different channel (thus multi-spectral), or 70 km if all cameras are used for viewing parallel strips in the same channel (thus panchromatic). Cross-track pointing capability ± 26° for stereoscopy in between orbits
Resolution	5.8 m
Coverage / Cycle	Global coverage in 24 days, in daylight. 5 days for a target area by using cross-track pointing
Mass	133 kg	Power	129 W	Data Rate	294 Mbps

Providing Agency	ISRO
Instrument Maturity	Flown on operational programme
Utilization Period:	2004 to ≥2022
Last update:	2021-06-16

Detailed characteristics

Central wavelength	Spectral interval	SNR @ specified input spectral radiance
0.555 µm	0.52 - 0.59 µm	335 @ 612 W m^-2 sr^-1 µm^-1
0.650 µm	0.62 - 0.68 µm	360 @ 496 W m^-2 sr^-1 µm^-1
0.815 µm	0.77 - 0.86 µm	248 @ 391 W m^-2 sr^-1 µm^-1

Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Satellite for Earth Resources (ISRO)
- ResourceSat-1 (IRS-P6) (see instrument status) Oct 2003 - 2022
- ResourceSat-2 (see instrument status) Apr 2011 - 2022
- ResourceSat-2A (see instrument status) Dec 2016 - 2022

Instrument classification

Earth observation instrument
Passive optical radiometer or spectrometer
High resolution optical imager

WIGOS Subcomponents

Subcomponent 1
High-resolution multi-spectral VIS/IR imager

Mission objectives

Primary mission objectives

Biomass
Fraction of vegetated land
Land cover
Leaf Area Index (LAI)
Normalised Difference Vegetation Index (NDVI)

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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers

Variable	Relevance for measuring this variable	Operational limitations	Explanation
Biomass	5 - marginal	Cloud sensitive.. Index only.. Infrequent coverage.. Daylight only.	VIS and NIR channels. Biomass inferred from NDVI
Cloud cover	5 - marginal	Infrequent coverage.. Daylight only.	VIS and NIR channels
Cloud optical depth	4 - fair	Low-density cloud only.. Infrequent coverage.. Daylight only.	VIS and NIR channels
Fire fractional cover	2 - very high	Daylight only.. Cloud sensitive.	VIS channels with high resolution for boundary detection
Fraction of vegetated land	2 - very high	Cloud sensitive.. Daylight only.	VIS and NIR channels
Glacier cover	4 - fair	Cloud sensitive.. Long time for mapping.. Daylight only.	VIS and NIR channels
Glacier topography	5 - marginal	Cloud sensitive.. Long time for mapping.. Daylight only.	VIS channel(s) and cross-track steering capability for stereoscopy between images from neighbour orbits
Ice sheet topography	5 - marginal	Cloud sensitive.. Long time for mapping.. Daylight only.	VIS channel(s) and cross-track steering capability for stereoscopy between images from neighbour orbits
Land cover	2 - very high	Cloud sensitive.. Daylight only.	VIS and NIR channels
Land surface topography	5 - marginal	Cloud sensitive.. Long time for mapping.. Daylight only.	VIS channel(s) and cross-track steering capability for stereoscopy between images from neighbouring orbits
Leaf Area Index (LAI)	4 - fair	Cloud sensitive.. Daylight only.. Infrequent coverage.	VIS and NIR channels. LAI inferred from NDVI
Normalised Difference Vegetation Index (NDVI)	2 - very high	Cloud sensitive.. Infrequent coverage.	VIS and NIR channels
Photosynthetically Active Radiation (PAR)	5 - marginal	Cloud sensitive.. Infrequent coverage.	VIS channels, range undersampled
Sea-ice cover	5 - marginal	Cloud sensitive.. Daylight only.	VIS and NIR (for contour enhancement) channels
Short-wave cloud reflectance	5 - marginal	Infrequent coverage.	VIS and NIR channels. Unsuitable dynamic range (saturation)
Snow cover	4 - fair	Cloud sensitive.. Infrequent coverage.. Daylight only.	VIS and NIR channels
Soil moisture at surface	5 - marginal	Cloud sensitive.. Index only.. Infrequent coverage.. Daylight only.	VIS and NIR channels. Soil moisture inferred from differential brightness
Soil type	2 - very high	Cloud sensitive.. Daylight only.	VIS and NIR channels
Upward short-wave irradiance at TOA	5 - marginal	Spectral interpolation needed.. Information on BRDF needed.. Infrequent coverage.	VIS and NIR channels
Vegetation type	3 - high	Cloud sensitive.. Daylight only.	VIS and NIR channels
Aerosol volcanic ash	5 - marginal	Cloud sensitive.. Infrequent coverage.. Daylight only.	VIS and NIR channels
Aerosol volcanic ash Total Column	5 - marginal	Cloud sensitive.. Infrequent coverage.. Daylight only.	VIS and NIR channels