European Space Agency


Focus Earth

Vienna, Austria

Danube

Data acquisition: Fucino, Italy
Data processing: Italian PAF, ASI, Matera, Italy

Red: 	Orbit 7696-Frame 2637-4 Jan. 1993
Green: 	Orbit 5692-Frame 2637-17 Aug. 1992 
Blue: 	Orbit 4189-Frame 2637-4 May 1992

In this ERS-1 SAR multitemporal image, the River Danube can be seen crossing from left to right as it flows through a fertile depression with distinctive field patterns. The bright, built-up area expanding southwards in the top right includes the city of Vienna. The hilly area to the left shows a different morphology due to the different lithological compositions: crystalline, limestone, and sandstone. It ends west of Vienna in the famous Vienna Woods . To the lower right is the Neusiedler Lake, which exhibits surface roughness effects due to local light winds.

West Africa

Guinea

Data acquisition: Niamey Ground Station, 28 January 1993
Data processing: ESA/ESRIN, Frascati, Italy

This three-band (1,2,4) NOAA-11 AVHRR colour composite is the result of the application of calibration, classification and enhancement techniques to the original data. The active fire algorithm has marked the pixels in red whenever a fire has been detected. It has identified over 1700 active fires , due mainly to human action and rural habits, over a wide geographical area that includes the following countries: Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, part of Benin, part of Niger, Burkina Faso, Mali, part of Senegal, and part of Mauritania.

O. Arino, J. Lichtenegger, & G. Calabresi
ESA/ESRIN, Frascati, Italy


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Left Up Home ESA Bulletin Nr. 80.
Published November 1994.
Developed by ESA-ESRIN ID/D.