| Abstract | MODIS (or Moderate Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning, while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications). These data will improve our understanding of global dynamics and processes occurring on the land, in the oceans, and in the lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment. This modis service shows imagery from both Terra (late morning) and Aqua (mid afternoon) whenever possible. The filenames of the TIFF images are compiled as follows: platform_code.lastest.fileday.state.band-combination.resolution.tif The platform_code can be either "t1" for Terra (late morning) or "a1" for Aqua (mid afternoon). What is described as "latest" shows a combination of the year (first two digits) followed by the day of the year (three digits ranging from 1-365). The next entry shows the state product group: AV=AmericaView, PA=Pennsylvania). A standard 2-letter abbreviation is being used for the state. The fourth part of the filename describes the "band-combination" which determines the color of the image, either "true-color" (Band 1-4-3 Combination) or "false-color", e.g., "Band 2-1-4 Combination" or "Band 7-2-1 Combination" What is described at "resolution" is the resolution per pixel that the satelite can resolve. 250 m (273.4 yards or 820 ft 2.51 in) is the maximum avalialbe resolution. A more detailed description can be found here: http://en.wikipedia.org/wiki/Moderate-Resolution_Imaging_Spectroradiometer The following section list the files and the acutal times they were obtained. The following files are from year: 2012 and day-of-year: 169 or simply: Sunday June 17 2012 name size date time ------------------------------------------------------- a1.latest.AV_PA.143.250m.tif (4314511 2012-06-17 23:16) a1.latest.AV_PA.214.250m.tif (4189867 2012-06-17 23:16) a1.latest.AV_PA.721.250m.tif (5507771 2012-06-17 23:16) The following files are from year: 2012 and day-of-year: 169 or simply: Sunday June 17 2012 name size date time ------------------------------------------------------- t1.latest.AV_PA.143.250m.tif (4246649 2012-06-17 20:33) t1.latest.AV_PA.214.250m.tif (4424639 2012-06-17 20:33) t1.latest.AV_PA.721.250m.tif (5168685 2012-06-17 20:33) This file was updated on: Mon Jun 18 07:15:15 EDT 2012 |
