As the satellite sees the Brazilian magnetic anomaly

12.04.2004

12.04.2004


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As the satellite "sees" the Brazilian magnetic anomaly
Shown in the illustration map obtained using the device MISR (Multi-angle Imaging SpectroRadiometer), which is showing a range of radiometer to gather information simultaneously from different directions. This device is installed on a dedicated satellite NASA "Terra" ("Terra"), which was launched into a circular polar orbit (orbital altitude of 705 km and inclination 98.3 degrees) in December 1999.
This map is based on the so-called "dark" data device MISR, derived from 3 to February 16, February 2000, when the cover unit was not open yet. Such measurement could hold because MISR, intended for reception of visible light is also sensitive to the flow of high energy protons on a large heights (such protons produce flashes of light passing through the chamber).
So look at the geographical coordinates obtained by the MISR instrument on the fluxes of energetic protons. In the figure are visible from the satellite in orbit, with omission means that at this point information was not available. Each element of the card — a square the size of a quarter of a degree of latitude and longitude, and each element contains hundreds or even thousands of pixels from images taken by MISR.
The figure clearly visible region of the Brazilian Magnetic Anomaly (orange-red spot in the South America). This is due to the fact that in this area, there are always large flows of high-energy protons, and we see the results of these particles falling into the device.
 

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