ESA Earth Home Missions Data Products Resources Applications
EO Data Access
How to Apply
How to Access
ERS-1 INSAR Images (1991-1993)
Site Map
Frequently asked questions
Terms of use
Contact us


Description of Contents of this Collection

All images are ERS-1 AMI derived.

Bern Images:

All the Bern images cover an area of about 30 by 50 kilometers. Resolution in the interferograms varies between 20 and 200 meters, depending on surface slope. The data were collected on the 24th and 27th of Novemeber 1991 and include the city of Bern, Switzerland towards the center of the image.

Bern Height Map -- This is a height map derived from the ERS-1 pair which was used for all the images. It covers an altitude range of 500 to slightly over 1000 meters. This image is in the radar slant range geometry. (look angle of approximately 22 degrees.)

Bern Interferometric Correlation Coefficient -- This image is of the interferometric correlation coefficient which is a measure of how well the two images correlate. The color scale covers the range for the coefficient between .1 amd .8. The maximum expected correlation is .84 given that the interferometric baseline was on the order of 80 meters.

Bern Directional Slope Map -- Directional interferometrically derived slope map of the Bern area. The brightness of the image is proportional to the slope and the color codes the direction of the uphill pointing gradient.

Bern Rectified Image -- This is a rectified image, interferometrically derived heights and cross track positions are used to remove the layover distortion inherent in SAR images. This image is the basis for the creation of

Bern Perspective View -- perspective view created at RSL using the EARTH visualization software developed here at the Geographic Institute. Multiple views can be created to simulate movement over the site and adjoining regions.

Toolik Images:

These images are all of the Toolik lake area, on the North Slope of the Brooks Range in Alaska. The data receiving station was the Alaska SAR facility at the University of Alaska during September of 1991.

Toolik Correlation Coefficient-- This is an image of the correlation coefficient for the Alaska scene showning a great deal of water related temporal change.

Toolik Shaded Relief Map -- shaded relief map of Alaska showing brightness proportional to the cosine of the local radar incidence angle as a function of surface slope.

Toolik Surface Slopes -- slopes of the surface drived from the interferogram.mod

 NameLast modifiedSize

[DIR]Higher Level  -  
[   ]Toolik Lake Shaded Relief Map (1991)08-Feb-2010 09:21 1.2K 
[   ]Toolik Lake Correlation Coefficient (1991)08-Feb-2010 09:21 1.3K 
[   ]Berne slope Map (1991)08-Feb-2010 09:21 1.3K 
[   ]Berne Perspective View (1991)08-Feb-2010 09:21 1.6K 
[   ]Berne Interferogram (1991)08-Feb-2010 09:21 1.4K 
[   ]Berne Height Map (1991)08-Feb-2010 09:21 1.4K 
[   ]Berne Correlation Coefficient (1991)08-Feb-2010 09:21 1.8K 
[   ]Toolik Surface Slopes (1991)08-Feb-2010 09:21 736  
[   ]Toolik Shaded Relief Map (1991)08-Feb-2010 09:21 830  
[   ]Berne Rectified Image (1991)08-Feb-2010 09:21 892  
[   ]Berne Perspective View (1991)08-Feb-2010 09:21 888  
[   ]Berne Interferometric Correlation Coefficient (1991)08-Feb-2010 09:21 1.0K 
[   ]Berne Height Map (1991)08-Feb-2010 09:21 916  
[   ]Berne Directional Slope Map (1991)08-Feb-2010 09:21 887  

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry