When a Landsat satellite passes within range of the ground station at the USGS EROS center, image data are downlinked and displayed in near-real time.
When Landsat 5 and 7 are not in range, the most recent pass is displayed.
The EarthNow! Landsat Image Viewer displays the images in the 5, 4, 3 (Red, Green, Blue) band combination for both the TM and ETM+ sensors.
Each pixel of Landsat data in the EarthNow! viewer covers about 250 meters by 250 meters.
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