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About IRS-P5
IRS-P5 (also known as Cartosat-1) was an Indian Earth-imaging satellite that launched on 5 May 2005 and ended operations on 5 May 2019.
The mission was owned and operated by the Indian Space Research Organisation (ISRO) and its applications focused on mapping India.
| Orbit Height | 618 km |
| Orbit Type | Sun-synchronous near-polar |
| Orbit Duration | 97 min |
| Number of Orbits Per day | 14 |
| Repeat Cycle | 5 days |
IRS-P5 Objectives
The data from IRS-P5 provided enhanced inputs for large scale mapping applications and stimulates applications in the urban and rural development, land and water resources management, disaster assessment, land cover change detection, relief planning and management, environmental impact assessment and various other Geographical Information Systems (GIS) applications.
IRS-P5 Instruments
PAN-Fore and PAN-Aft
IRS-P5 carried two state-of-the-art panchromatic (PAN) cameras that took black and white stereoscopic pictures of Earth in the visible region of the electromagnetic spectrum: Stereo imagery was acquired with a small time difference due to the forward and backward look angles of the two cameras. An algorithm for Earth rotation compensation was used to eliminate the delayed observations of the two cameras. The discrimination of elevation differences of better than 5 m make the data particularly suitable for map-making and terrain modelling.
| Parameter | PAN-F Camera | PAN-A Camera |
| Spectral range | 500 - 850 nm | 500 - 850 nm |
| Along-track tilt angle with respect to nadir | +26º | -5º |
| Spatial resolution (cross-track x along-track) | 2.5 m x 2.78 m | 2.22 m x 2.23 m |
| Radiometric resolution a) saturation radiance b) data quantization c) SNR | 55 mW/(cm2 sr µm) 10 bit 345 at saturation radiance | |
| Swath width (for stereo imagery) | 29.42 km | 26.24 km |
| Swath width (for monoscopic observation mode) | 5 km (with swath overlaps) | |
| CCD array (No of arrays x No of elements) Detector element size | 1 x 12,288 7 µm x 7 µm | 1 x 12,288 7 µm x 7 µm |
| Optics: Telescope aperture diameter No of mirrors Effective focal length F number FOV (Field of View) | 50 cm 3 1980 mm f/4.5 ±1.08º | |
| Integration time | 0.336 ms | |
| MTF (Modulation Transfer Function) | cross-track = 20, along-track = 23 | |
| Onboard calibration | Relative, using LEDs | |
| Data compression | JPEG algorithm, compression ratio = 3.2 (max) | |
| Data rate | 05 Mbit/s (source data rate of 340 Mbit/s) | |
| Nominal B/H ratio for stereo | 0.62 | |
IRS-P5 Data
DATA COLLECTIONS
ESA is offering, for scientific research and application development, access to data from the Cartosat-1 mission based upon submission and acceptance of a project proposal. These products are available as part of the GAF Indian Satellite Imagery products.
ESA will support as many high-quality and innovative projects as possible within the quota limit available, therefore only a limited amount of products can be made available to each project.
ESA offers registered users the access to the Online Dissemination server to the following data collections: