Gallery

COSMO-SkyMed Delta-SAR Result Click on Image to Zoom In New! COSMO-SkyMed Δ-SAR Results

Two COSMO-SkyMed data collections over Giza, Egypt were processed by Neva Ridge's Δ-SAR software. The collections occurred only days apart using two of the three CSM satellites currently in orbit. Click on the image to the left or here to see a close-up of the coherence change detection (CCD) product generated by the pair of collections using Δ-SAR. Click here to see the amplitude change detection (ACD) result producted by Δ-SAR. For more information about Δ-SAR, click here. These images only show a small portion of the entire scene processed by Δ-SAR. The entire scene can be browsed here for CCD and here for ACD. 		Giza ACD/CCD Animation Click on Image to Zoom In New! COSMO-SkyMed Δ-SAR Animated Results

By "blinking" between the two change products produced by Δ-SAR, one can gain insight into the nature of the change on the terrain. When a significant number of scatterers are removed or added to an area, the changes are observable in both the ACD and CCD images. If the scatterers within an area are only rearranged, this will become apparent only in the CCD image. This animation which blinks between registered ACD and CCD images makes these various changes easier to detect and understand.
TerraSAR-X Spotlight CCD Click on Image to Zoom In Coherent Change Detection - Spotlight Mode

TerraSAR-X data was collected over the Ayers Rock area of Australia in the 300 MHz spotlight mode (HS mode). Two collections took place 11 days apart in February 2009. The complex image data (SSC product) for these collects was read into Δ-SAR and processed to a coherent change detection (CCD) image and an amplitude change detection (ACD) image. The area imaged corresponds to about 25 square kilometers. The resulting products were ingested into Google Earth and presented in the perspective view shown here. 		Tokyo ACD Image Click on Image to Zoom In Δ-SAR ACD of Urban Area

Using the 150 MHz High Resolution Spotlight Mode (HS) of TerraSAR-X, two acquisitions of Tokyo, Japan were made approximately 3 months apart. This ACD image generated using Δ-SAR highlights the changes that have occurred during that time period. Click on the thumbnail and scroll around the image to see high-rise buildings being built, new bridges, moving traffic, and even a ferris wheel in a slightly different orientation. It is interesting to compare this ACD image with the optical imagery on Google™ Maps.
Amplitude Change Detection Click on Image to Zoom In Amplitude Change Detection

This amplitude change detection image of Phoenix, Arizona was created using the Neva Ridge Δ-SAR processing tool and a pair of RADARSAT-2 images acquired in May 2008. Objects in the scene which have arrived after the first acquisition are shown in blue. Objects that have departed by the second acquisition are shown in red. Click here for more information about Δ-SAR. 		Coherent Change Detection Click on Image to Zoom In Coherent Change Detection

This coherent change detection image was created using the Δ-SAR processing tool and the same pair of RADARSAT-2 images as used in the example to the left. The complex coherence between the two observations are encoded as gray levels. Decorrelated (dark) areas have undergone significant wavelength- scale changes between the two observations. Click here for more information about Δ-SAR.
TerraSAR X Phoenix Click on Image to Zoom In TerraSAR X Image of Phoenix

This is a high resolution SAR image collected by the German Satellite TerraSAR-X. It shows the city of Phoenix, Arizona as imaged by the X-band SAR at approximately 2 meters resolution. Data was collected on March 1, 2008. 		3-Frequency SAR Image Click on Image to Zoom In Three Frequency SAR Image

This image was generated by combining three data collections at different SAR frequencies of the same area. In this image, we use data from PALSAR, RADARSAT-2, and TerraSAR-X to generate the red, green, and blue images respectively. These are combined to form the image you see.