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June 2004 |
Remote Sensing in India Evolution and growth
IRS-P2
- Launched in: 1994
- Repeat Cycle: 24 Days
- Orbit Height: 817 Km
- Orbit Type: Sun Synchronous
Launched on October 15, 1994 from Sriharikota aboard the PSLV-D2. The 5-metre panchromatic data is especially useful for urban planning and mapping, the 25-metre multi-spectral data is good for natural resource planning; and the 180 metre wide-field data band has a 740 km swath and 5-day repeat coverage, which is excellent for large-area vegetation monitoring.
Table LISS II Sensor Bands
| Band | Wavelength (µm) | Bandwidth (µm) | Resolution (m) | Swath width (km) | Revisit time (day) |
| Band 1 (VIS) | 0.46 to 0.52 | _ | 36.25 | 74 (146.5*) | 22 |
| Band 2 (VIS) | 0.52 to 0.59 | _ | 36.25 | 74 (146.5) | 22 |
| Band 3 (VIS) | 0.62 to 0.68 | _ | 36.25 | 74 (146.5) | 22 |
| Band 4 (NIR) | 0.77 to 0.86 | _ | 36.25 | 74 (146.5) | 22 |
* Two LISS II cameras combined swath.
IRS P3
The IRS-P3 satellite was launched from Sriharikota using PSLV-D3 on March 21, 1996. IRS-P3 was put in a polar, sun-synchronous orbit at an altitude of 817 km with equatorial crossing time of 10:30 AM in the descending node. IRS - P3 has an X-ray astronomy and two remote sensing payloads, namely WiFS and MOS. The mission caters to oceanography applications. IRS-P3 WiFS is similar to IRS-1C WiFS but for the inclusion of an additional band in the Middle Infra-red (MIR) region. This sensor is primarily meant for vegetation dynamic studies while MOS is meant for ocean related studies.
Table IRS P3 WiFS Camera (Sensor Characteristics)
| Sensor | WiFS |
| Resolution | 188 x 188 m (B3 & B4)
188 x 246 (B5) |
| Swath | 770 km |
| Repetitivity | 24 days |
| Spectral Bands | 0.62 - 0.68 microns (B3)
0.77 - 0.86 microns (B4)
1.55 - 1.69 microns (B5)
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