- Info
IRS 1C/1D
Multi Resolution Twin Satellites
IRS 1C and IRS 1D are twin satellites launched in 1995 and
1997. The satellites contain 3 sensors PAN, LISS-3, and WiFS,
witch collect panchromatic multispectral imagery in at varying
resolutions. IRS 1D is currently operational, well past its
design life.
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IRS 1C/1D
Specifications
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Satellite
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IRS 1C
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IRS 1D
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Launch
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December 28, 1995
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September 29, 1997
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Mission Life
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mission complete
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operational
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Orbit
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817km 98.69 degree
sun-synchronous
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737x821km 98.53 degree sun-synchronous |
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Nodal Crossing
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10:30 AM
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10:30 AM
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Revisit Time
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24 days
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25 days
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Off-Nadir Imaging
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+/- 26 degrees
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+/- 26 degrees |
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Stereo Imaging
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No
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No
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Tasking
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No
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Yes
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LISS-3 Sensor
Specifications
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Imaging
Mode
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Multispectral
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Spatial Resolution
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24m
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Spectral Range
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520-590 nm (Green)
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620-680 nm (Red)
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770-860 nm (NIR)
1550-1700 nm (MIR)
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Swath Width
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141 km
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Dynamic Range
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7 bits
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PAN Sensor
Specifications
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Imaging
Mode
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Panchromatic
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Spatial Resolution
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5.8 m
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Spectral Range
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500-750 nm
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Swath Width
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70 km
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Dynamic Range
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6 bits
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WiFS Sensor
Specifications
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Imaging
Mode
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Multispectral
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Spatial Resolution
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188 m
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Spectral
Range
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620-680 nm (Red)
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|
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770-860 nm (NIR)
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Swath Width
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810 km
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Dynamic Range
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7
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