IRS P6/Resourcesat-1 and Resourcesat-2

The IRS (Indian Remote Sensing) satellites form a large family of Earth observation satellites operated by the Indian space agency.
IRS P6/Resourcesat-1 and Resourcesat-2 ensure continuity of medium and high resolution data supply provided by the twin satellites IRS-1C and IRS-1D. These two, launched in 1995 and 1997 respectively, have completed their missions after more than 10 years of service. Like their predecessors, Resourcesat satellites carry a LISS-III sensor as well as a wide field AWiFS sensor, but the high resolution (5.8 m) LISS-4 sensor replaces the panchromatic sensor. The high-resolution data are useful for applications such as urban planning and mapping, while the average resolution is used for vegetation discrimination, land mapping, and natural resources management.

altitude: 816-818 km
inclination: 98.6 degrees
orbit: sun-synchronous polar
orbit period: 101 minutes
revisit time (LISS-4 et AWIFS): 5 days
swath width : 23,9 km – 70,3 km (LISS-IV) ; 140 km (LISS-III); 740 km (AWIFS)
satellites: IRS-P6/Resourcesat-1 (17/10/2003 – – 30/09/2013)
  Resourcesat-2 (20/04/2011– operational)

LISS-III sensor
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 metres in all spectral bands.

Band
Spectral band
Resolution
2 0,52 - 0,59 µm 23 x 23 m
3 0,62 - 0,68 µm 23 x 23 m
4 0,77 - 0,86 µm 23 x 23 m
5 1,55 - 1,70 µm 23 x 23 m


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
Panchromatic 0,50 - 0,75 µm 5,8 x 5,8 m

Mode
Band
Spectral band
Resolution
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
  4 0,77 - 0,86 µm 5,8 x 5,8 m


AWiFS sensor
AWIFS (Advanced Wide Field Sensor) is an optical sensor with intermediate spatial resolution.

Band
Spectral band
Resolution
1 0,52 - 0,59 µm 56 x 56 m
2 0,62 - 0,68 µm 56 x 56 m
3 0,77 - 0,86 µm 56 x 56 m
4 1,55 - 1,70 µm 56 x 56 m

 

Mission website

Access to data :

ESA Earth Online

Euromap

 


PAN
Amsterdam Airport
© 1998 ANTRIX, SI, Euromap Neustrelitz

LISS
San Francisco Bay - Courtesy of National Point of Contact, www.npoc.nl

WiFS
Greece
© 1998 ANTRIX, SI, Euromap Neustrelitz