The satellites are deployed in a circular sun-synchronous close to polar orbit at an altitude of 510 km (+/- 40 km). MODIS has collected close to-every day satellite tv for pc imagery of the earth in 36 spectral bands since 2000. MODIS is on board the NASA Terra and Aqua satellites. Satellite imagery is sometimes supplemented with aerial pictures, which has larger resolution, but is costlier per sq. meter. Satellite imagery can be mixed with vector or raster information in a GIS offered that the imagery has been spatially rectified so that it will correctly align with other information sets.
The satellite photographs were produced from pixels. The first crude image taken by the satellite tv for pc Explorer 6 shows a sunlit space of the Central Pacific Ocean and its cloud cover. The photo was taken when the satellite tv for pc was about 17,000 mi (27,000 km) above … Read More