The system is based on a new optical system: a push-broom camera with a 10 m focal length, which has been folded into two meters through the use of a mirror. It is supposed that this telescope will resolve terrestrial object less than 1 meter as it passes 680 km at nadir at the speed of 7 km per second. This satellite was designed to take both panchromatic images with one-meter resolution and multispectral images with 3.2-meter resolution. Additionally, a near-infrared band at 3.2-meter resolution is imaged.
The entire satellite will be able to pivot in orbit to collect cross-track imagery coving a distance of 725 km at either side of the ground track. Due to the satellite's 680 km altitude, imagery will maintain at least a one-meter ground sample distance (GSD) for 350 km to either side of nadir, or a 700 km swath of at least one meter imagery.
The system is designed to carry three GPS antennas and three digital star trackers to maintain precisely camera station's position and attitude. A rigid satellite platform was built to reduce the vibration of platform and to contribute the integrity of the line-of-sight determination. The satellite will be rotating around the Earth in a sun synchronous polar orbit, which will allow it to traverse the planet every 98 minutes, crossing the equator at the same time (ca. 10.30 am ) in every orbit.
Specification
1. General Information
|
Corporation "System" Name |
Space Imaging |
|
|
Payload |
~ 225 - 275 kg |
|
|
Model |
Panchromatic |
Multispectral |
|
Pixels |
11 bit |
11 bit |
2. Orbit Information
|
Flying Height |
680 km |
|
|
Inclination (deg) |
98.1(deg) (Sun synchronous) |
|
|
Repeat visite |
14 days (Max) |
|
|
Repeat Cycle |
1-3 days (Max) |
|
|
Period (rev/day) |
14.6 |
|
3. Processing Information
|
Scene (max) |
Process 600/day |
|
|
On board recording |
64 GB |
|
|
Delivery time from Acquisition to User |
24 hr. - 48 hr. |
|
|
Ground Station Sites |
Denver CO, Norman OK, Alaska, Kirana Sweden, and Greece |
|
4. Sensor Information
|
Swath width (km) |
11.3 by 11.3 |
|
|
Field of view (FOV) |
0.93° |
|
|
Stereo imaging |
In track |
|
|
Sensor position |
GPS |
|
|
Sensor attitude |
Gyros and 2 Star trackers |
|
|
Pointing in track Cross track |
45° |
|
|
Resolution at Nadir |
Panchromatic |
Multispectral |
|
Resolutions (m) |
0.82 |
3.2 |
|
Spectral band widths (nm) |
450-900 |
445-516 (Blue) 506-595 (Green) 632-698 (Red) 757-853 (NIR) |