Meet Bernie. Bernie Sanders is a Democratic candidate for President of the United States. In 2006, he was elected to the U.S. Senate after 16 years as Vermontâs sole congressman in the House of Representatives. Bernie is now serving his second term in the U.S. Senate after winning re-election in 2012 with 71 percent of the vote.
Satellite imagery at 30-centimeter resolution provides the clearest, most detailed view of the ground from space. See sample imagery to find out for yourself. If you use commercial satellite imagery to map, monitor or assess situations, materials, or infrastructure, you are probably accustomed to 50-centimeter spatial resolution.
The images are composed of thousands of pixels that the satellite scanned into rows and columns. The satellite gathers a group of rows into a computer file. This file covers an area of Earth known as a scene. The scene size varies depending on the sensor. Sensors on Landsat, the US satellite series, has scenes about 185 km (115 miles) on each side. The illustration shows a Landsat scene coverage for the San Francisco Bay Area. Scenes for other commonly-used sensors range in size from 60 km to 2200 km. A scene of Landsat can have over 6000 rows and columns of pixels. You usually purchase satellite imagery by the scene. Scenes can cost anywhere from $50 for poorer-resolution, public-domain data to over $5000 for higher-quality scenes.