 |
||
| Spotlight | |
| High Resolution | |
| Spotlight (HS) | |
| SpotLight (SL) | |
| StripMap | |
| ScanSAR | |
| Visual Mode comparison | |
| Go to TerraSAR-X Gallery | |
| Ordering Information | |
.............................................
..................................................
SpotLight Mode
StripMap Mode
ScanSAR Mode
Satellite Overview
The TerraSAR-X Basic Image Products are described by the following characteristics:
Image Mode
Spotlight (up to 1 m resolution) |
|
| StripMap
(up to 3 m resolution) |
|
| ScanSAR
(up to 16 m resolution) |
Polarization: single or dual in HH, VV, HV, VH
combinations
SpotLight Product
The TerraSAR-X SpotLight mode will provide the most sophisticated radar imagery available on the market.
During the observation of a particular ground scene, the radar beam will be steered like a spotlight, illuminating the area of interest longer, thus achieving a 1-2 meter resolution.
The dual pass interferometry with the precise orbit tracing allows the production of Digital Elevation Models.
The SpotLight (X-Band) key features are:
|
Very high geometric resolution |
|
| High
radiometric enhancement possible |
|
| High
temporal repeat rates |
|
| Interferometry
capability |
|
| Repeated
coverage at different viewing angles |
|
| Acquisition
of up to 4 subswaths in parallel |
|
| Weather
and illumination independent due to microwave frequency |
|
| Different
polarisations at the same time with reduced resolution |
|
High Resolution SpotLight (HS)
In this mode, the most favorable combination of the key features results in the following product specifications:
| Scene extension: | 5 km (azimuth) x 10 km (ground range) |
| Incidence angle (full performance): | 20° - 55° |
| Max. azimuth steering angle range: | +/- 0.75° |
| Azimuth resolution: | 1 m |
| Ground range resolution: | 1.5 m @ 55° incidence angle |
| Polarization: | single & dual |
SpotLight (SL)
In this variation of the above mode, the geometric azimuth (in flight direction) resolution is reduced in order to increase the azimuth scene extension.
| Scene extension: | 10 km (azimuth) x 10 km (ground range) |
| Incidence angle (full performance): | 20° - 55° |
| Max. azimuth steering angle range: | +/- 0.75° |
| Azimuth resolution: | 2 m |
| Ground range resolution: | 1.5 m @ 55° incidence angle |
| Polarization: | single & dual |
Acquisition geometry of the SpotLight Mode
|
The images can be acquired within an access range of approximately
463 km (full performance range) |
|
| Beam
steering (yellow ellipsoid) = extended illumination of area
of interest |
|
| Standard
looking direction is right, on demand left looking is possible
by satellite rolling |
StripMap Product
The StripMap-Product provides an optimized combination between high resolution and size of acquired area. The ground swath is illuminated with a continuous sequence of pulses while the antenna beam is fixed in elevation and azimuth.
This results in an image strip with a continuous image quality in flight direction, at a 3-meter resolution. The dual path pass interferometry with the precise orbit tracing allows the production of Digital Elevation Models.
The StripMap key features are:
| High
geometric resolution |
|
| High
radiometric enhancement possible |
|
| High
temporal repeat rates |
|
|
Excellent coverage to resolution ratio (strip length up to
1600 km) |
|
| High
temporal repeat rates |
|
| Interferometry
capability |
|
| Weather
and illumination independent due to microwave frequency |
|
| Repeated
coverage at different viewing angles |
|
Considering the most appropriate combination of the key features the product specification will be described by:
| Swath width (ground range): | 30 km |
| Acquisition length: | max. 1650 km |
| Incidence angle | 20° - 45° |
| Azimuth resolution: | 3 m |
| Ground range resolution: | 1.7 m @ 45° incidence angle |
| Polarization: | single & dual |
Acquisition geometry of the StripMap
|
The images can be acquired within an access range of approximately 287 km (full performance range) |
|
| The
maximum length of the acquisition is limited by the battery power and thermal conditions of the sensor. |
|
| Standard
looking direction is right, on demand left looking is possible by satellite rolling |
ScanSAR Product
Within one week large areas of up to 100,000 km² can be covered in 16 m resolution anywhere on the globe. In the ScanSAR mode, a swath width of approx. 100 km will be achieved by scanning four adjacent ground sub-swaths with quasi simultaneous beams, each with a different incidence angle. This mode also allows repeated ScanSAR acquisitions with a synchronized burst pattern as a prerequisite for ScanSAR interferometry.
The ScanSAR features are:
| Medium
geometric resolution |
|
| High
radiometric enhancement possible |
|
| High
coverage rate |
|
|
High temporal repeat rates |
|
| High
temporal repeat rates |
|
| Interferometry
capability |
|
| Weather
and illumination independent due to microwave frequency |
|
| Repeated
coverage at different viewing angles |
|
| Different
polarisations at the same time with reduced resolution |
Considering the most appropriate combination of the key features the product specification will be described by:
| Number of sub-swaths: | 4 |
| Swath width (ground range): | 100 km |
| Acquisition length: | < 1650 km |
| Incidence angle | 20° - 45° |
| Azimuth resolution: | 16 m |
| Ground range resolution: | 1.7 m @ 45° |
| Polarization: | single & dual |
Acquisition geometry of the ScanSAR:
|
The images can be acquired within an access range of approximately 287 km (full performance range) |
|
| The
maximum length of the acquisition is limited by the battery power and thermal conditions of the sensor. |
|
| Standard
looking direction is right, on demand left looking is possible by satellite rolling |
1) An Airport in Germany:
2) Langnau, Germany
Click
here for further images
For more information, contact
us.
Other
information about TerraSAR-X.
©2008
Apogee Imaging International•All rights reserved.