Resourcesat-1 (IRS-P6) and Resourcesat-2
Resourcesat-2 AWiFS collected on January 24th, 2017 over Path 284 Row 49 Bands 5, 4, 3 over the Southeastern USA.
Linear Imaging Self-Scanning Sensor three (LISS-3)
Resourcesat-2 LISS-3 collected on January 25th, 2017 over Path 289 Row 42 bands 5, 4, 3 over the Chesapeake Bay, and Delaware Bay, USA.
A partnership established between the Indian Space Research Organization (ISRO) and the United States Geological Survey (USGS) allows for USGS storage and redistribution of data acquired over the United States by the Indian Remote Sensing (IRS) Advanced Wide Field Sensor (AWiFS) and Linear Imaging Self-Scanning Sensor three (LISS-3) onboard the Resourcesat-1 and Resourcesat-2 satellites.
USGS Distribution of Resourcesat-1 (P6) and Resourcesat-2 Products
The collaborative effort between ISRO and USGS provides for public access and redistribution of IRS data acquired over the United States at no cost, allowing users to download the AWiFS and LISS-3 imagery from USGS through Earth Explorer. The product options from USGS include a Level 1 Geometrically (L1G) corrected standard product, as well as a Level 1 Precision Terrain (L1T) corrected product where feasible.
USGS will distribute all newly acquired data over the US from the Resourcesat-2 mission (August 2016 to present), along with historical data acquired by the Resourcesat-1 mission over the US from 2003 through the end of the mission.
The LISS-4 data is not part of the agreement with USGS and will not be made available through EarthExplorer or other USGS systems.
We would welcome any input or feedback from the user community. Please provide comments or suggestions regarding the Resourcesat-1 or Resourcesat-2 data products to: email@example.com
The Indian Remote Sensing (IRS) Resourcesat-1 (also known as IRS-P6) and Resourcesat-2 carry the same basic payload of sensors with the Advanced Wide Field Sensor (AWiFS) A and B, Linear Imaging Self-Scanning Sensor three (LISS-3), and the LISS-4.
The two satellites are very similar to one another in other respects, as indicated in the table below. Each satellite operates in a sun-synchronous orbit at an altitude of 817 km. The satellites take 101.35 minutes to complete one revolution around the earth and complete about 14 orbits per day. The entire earth is covered by 341 orbits during a 24-day cycle.The LISS-4 sensor is not part of the agreement with the USGS and will not be made available through EarthExplorer, or GloVis. EROS will only distribute newly aquired data from the R2 mission and the historical data from the R1 mission over the US only.
|Payloads||LISS-4, LISS-3, AWiFS-A, AWiFS-B (LISS-4 not available on EE)||LISS-4, LISS-3, AWiFS-A, AWiFS-B (LISS-4 not available on EE)|
|Orbit||Polar Sun Synchronous||Polar Sun Synchronous|
|Orbit height||817 km||817 km|
|Orbit period||101.35 min||101.35 min|
|Number of Orbits Per day||14||14|
|Local time of equator crossing||10:30 AM||10:30 AM|
|Repetivity (LISS-3)||24 days||24 days|
|Revisit (AWiFS)||5 days||5 days|
|Lift-Off mass||1360 kg||1360 kg|
|Attitude and orbit control||3-axis body stabilised using Reaction Wheels, Magnetic Torquers and Hydrazine Thrusters||3-axis body stabilised using Reaction Wheels, Magnetic Torquers and Hydrazine Thrusters|
|Power||Solar Array generating 1250 W, Two 24 Ah Ni-Cd batteries||Solar Array generating 1250 W, Two 24 Ah Ni-Cd batteries|
|Mission Life||5 years||5 years|
The AWiFS and LISS-3 sensors collect data over the Earth’s land surfaces with a revisit cycle of every 24 days for LISS-3 and every 5 days for AWiFS. Both sensors acquire 4 distinct bands in the Green, Red, NIR, and SWIR portions of the electromagnetic spectrum that line up approximately with Landsat Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+), and Operational Land Imager (OLI) Green, Red, NIR, and SWIR 1 bands.
The LISS-3 sensor is most comparable to the OLI sensor in resolution and coverage. However, the opportunity for ground collections are 24 days before repeat coverage. The AWiFS sensor provides repeated coverage every five days, due to its larger (740-km) swath width.
The LISS-3 and AWiFS instruments on the Resourcesat-1/2 satellites acquire four spectral bands ranging from the Visible and Near-Infrared (VNIR) to Shortwave Infrared (SWIR) wavelengths. The LISS-3 sensor covers a 140-km orbital swath with a product spatial resolution of 24 meters and a 24-day repeat cycle. The AWiFS sensor covers a 740-km orbital swath at a resolution of 56 meters and provides a 5-day repeat cycle.
There are several differences and improvements to the Resoursesat-2 AWiFS and LISS-3 sensors since the Resourcesat-1 design include: The AWiFS sensor output a 10 bit quantization with R1 and went to 12 bit quantization in the Resourcesast-2 mission. The LISS-3 quantization was 7 bits and went to 10 bit quantization with R2. Other than these changes, the sensors were virtually the same with respect to bandwidths.
|Resourcesat Sensor Specifications|
|Number of Bands||4||4|
|Spectral Band 2 (µ)||0.52 – 0.59 (green)||0.52 – 0.59 (green)|
|Spectral Band 3 (µ)||0.62 – 0.68 (red)||0.62 – 0.68 (red)|
|Spectral Band 4 (µ)||0.77 – 0.86 (NIR)||0.77 – 0.86 (NIR)|
|Spectral Band 5 (µ)||1.55 – 1.70 (SWIR)||1.55 – 1.70 (SWIR)|
|Revisit Period (days)||5||24|
A partnership between ISRO and the USGS allows for the public access and redistribution of US acquisitions of the ISRO R1 and R2 satellites at no cost through secondary US-based portals.
The Resourcesat data from USGS will initially be available for search, preview, and download through EarthExplorer only.
The LISS-3 products available from USGS are referenced to UTM/WGS84 (Universal Transverse Mercator/World Geodetic System 1984) projection and datum. The AWiFS products available from USGS are referenced to LCC/WGS84 (Lambert Conformal Conic/World Geodetic System 1984) projection and datum.
The USGS Earth Resources Observation and Science (EROS) Center processes all ISRO data to Level 1G. Scenes with sufficient ground control data for terrain correction are processed to Level 1T. The image data products are provided in Georeferenced Tagged Image File Format (GeoTIFF). The LISS-3 output product resolution is 24 meters, and the AWiFS product resolution is 56 meters. The download package from the USGS includes one file for each of the four spectral bands plus metadata.
Full Resolution Browse (FRB) images in GeoTIFF are also available from the USGS for the Resourcesat LISS-3 and AWiFS datasets. The FRB product is a simulated natural color composite image created from three selected bands (5, 4, 2).
The LISS-III and AWiFS data products are available from USGS free of charge to all data users including the general public, scientific, and commercial users.
Bandwidth comparison: Resourcesat-1/2 versus Landsat 8 ISRO IRS Resourcesat-1 and 2 sensors (AWiFS and LISS-3) compared with USGS Landsat 8 OLI plotted over an atmospheric transmission plot.
The data Use and Citation should follow the standard for USGS products. https://lta.cr.usgs.gov/citation, and any questions concerning the use or redistribution of ISRO data should be directed to the NRSC. https://nrsc.gov.in/
ISRO Resourcesat-2: http://www.isro.gov.in/Spacecraft/resourcesat-2
ISRO Resourcesat-1 Handbook: https://earth.esa.int/c/document_library/get_file?folderId=37846&name=DLFE-620.pdf
ISRO Resourcesat-2 Handbook: http://www.nrsc.gov.in/uim_2014_proceedings/infolets/Resourcesat2_Handbook.pdf
ISRO Resourcesat-2 Overview: http://lps16.esa.int/posterfiles/paper1213/%5bRD13%5d_Resourcesat-2_Handbook.pdf
Data Citation: https://lta.cr.usgs.gov/citation