Satellite data products are available on photographic and digital media. Photographic products can be supplied as films or prints in
- Black and White (B/W)
- Color (FCC)
Generally, single band data is provided in B/W such as PAN data or one band data from multi-spectral sensors such as LISS-III, LISS-II, TM etc. Similarly, photographic, color products called as False Color Composites (FCC) can be provided for multi-spectral data. The output of B/W and FCC products can be provided in the form of:
- Film(negatives or positives)240 x 240 mm
- Enlargements/Paper prints
- 1x -240mmx240mm
- 2x -480mmx480mm
- 4x -960mmx960mm
- 5x -1000mmx1000mm
The output scale for prints can vary from 1:1 M to 1: 5000.
For users who need the data on photographic media, the data is converted into analog form using film recorders. Since there is a change from digital domain to analog domain and to accommodate the film characteristics, an appropriate transfer function called Look-Up-Table(LUT) has to be applied during the transformation. If the LUT is achieved with the best possible enhancement of a particular scene based on its histogram, it is called scene Specific LUT. On the other hand uniformity of color for a particular feature from one scene to another is maintained using common LUT (optimized over a wide region).
Digital Data Product formats
Digital Data are supplied in the following formats
- LGSOWG Superstructure Format (all satellites/sensors except NOAA,AQUA and TERRA)
- Fast Format (all satellites/sensors except NOAA, AQUA and TERRA)
- GeoTIFF- Gray Scale (from IRS-1C onwards except NOAA, AQUA and TERRA)
- GeoTIFF - RGB single band FCC or NCC?(from IRS-1C onwards except NOAA, AQUA and TERRA)
- HDF (only AQUA and TERRA)
- PDF(only AQUA and TERRA)
The digital data format document is provided along with the digital data. |
