ImageSat International offers various types of panchromatic images characterized either by:

• Imaging Technique - the manner in which the satellite payload is used to acquire the imagery data; or
• Processing Level - the level of post processing performed on the ground after acquisition and reception of the imagery at the ground station.

The tables below summarize the basic product types classified according to the Image Acquisition technique.  All products listed are available.  A more detailed description of ImageSat products and processing options follows the table.

Imaging Technique - EROS A

Panchromatic Images	Dimensions	Remarks
Basic Image	14 km x 14 km	1.9 meter ground sampling distance (GSD) at nadir for an orbit of 510km. It is possible to acquire longer “vector” scene, up to ~200 km, depends on resolution and destination (On Board Recorded image or directly acquired).
Stereo Pair	14 km x 14 km	Two overlapped images of the same scene, acquired at symmetric or non-symmetric different viewing angles (fore and aft) during the same pass.

Imaging Parameters – EROS A

The imaging performances of the EROS A panchromatic camera will be as follows:

Scanning	Push-broom
Imaging sunlight conditions	Sun-over-horizon angle more than 10°
Sensor type	CCD
Spectral band	0. 5 to 0.9
Sampling Depth transmitted	10 bits
Ground Sampling Distance	1.9  m at Nadir from 510 km
Swath Width Inclination	14 km at Nadir from 510 km 97.2°
Local time of descending node	09:45

Imaging Technique - EROS B

Panchromatic Images	Dimensions	Remarks
Basic Image	7 km x 7 km	0.7 meter ground sampling distance (GSD) at nadir using TDI level 8 for an orbit of 510km. It is possible to acquire longer “vector” scene, up to ~480 km, depends on resolution, scanning direction, and destination (On Board Recorded image or directly acquired)
Stereo pair	7km x up to 21 km	Two overlapped images of the same scene, acquired at symmetric or non-symmetric different viewing angles (fore and aft) during the same pass.
Triplet	7 km x 14 km	Two Stereo images + one overhead Standard image of the same scene, acquired during the same pass. It is possible to acquire multiple images of the same scene in basic mode (for example two stereo pairs) in the same pass.
Mosaic	28 km x 26 km	Four adjoined images acquired during the same pass with small (500 m) overlapping.

Imaging Parameters – EROS B

The imaging performances of the EROS B panchromatic camera will be as follows:

Scanning	Push-broom, maximum scanning rate of 2400 lines/sec
Imaging sunlight conditions	Sun-over-horizon angle more than 10°
Sensor type	CCD-TDI, Selectable 1,4,8,16,32,48,64,96
Spectral band	0. 5 to 0.9
Sampling Depth transmitted	10 bits
Ground Sampling Distance	0.7 m at Nadir from 510 km for TDI stages 1,4,8 0.8 m at Nadir from 510 km for all other TDI stages
Swath Width Inclination Local time of descending node	7 km at Nadir from 510 km 97.2° 13:45
System corrected geolocation accuracy (w/o external information)	< 50 Meter

Processing Options EROS A and EROS B

Processing Level	Processing Designation	Remarks
Raw Imagery	Level 0A	Four image data channels (‘rulers’) are assembled, however, raw imagery is provided in completely unprocessed format just as it is received directly from the spacecraft. Provided only per customer request.
Radiometric System Correction	Level 1A	Level 0A is corrected in accordance with relative radiance response of the detectors and on-board signal processing electronics. In addition, the overlapping pixels are removed.
Geometric System Correction	Level 1B	Level 1A is resampled to geometrically corrected image in accordance with the attitude and spatial data provided by the Satellite during image acquisition (EROS-B), or in accordance with the planned attitude tasking data and measured orbit data (EROS-A). For the Level 1B, only an average scene elevation above Earth ellipsoid is used.
Orthorectified & Other Value Added Products		Available by special request

          

Formats

As a default EROS A and EROS B imagery processed to 1A and 1B levels and provided in 16 Bit Tiff (GeoTiff) formats.

Following images formats are available per customer request:
1A level products - 8 Bit Tiff (revision 6.0).

1B level products – 8 Bit GeoTiff (revision 2.1)

NEW

Colorized EROS data by fusion with RapidEye multispectral data.

A partnership  agreement has been signed between RapidEye and the ImageSat International..

The agreement will allow ImageSat to use RapidEye imagery to colorize their panchromatic 0.7 meter resolution imagery to produce a colorized product.