NOAA KLM User's Guide
The mapped GAC products consist of mapped mosaics displayed on polar stereographic and Mercator map projections with both forms available on digital media. The mapped mosaics consist of daytime visible (VIS) and Infrared (IR), and nighttime IR imagery. The mapped GAC product in polar stereographic form is described in Section 9.2.1, while the mapped GAC product in Mercator form is described in Section 9.2.2. For a representative sample of Mapped GAC products, users should link to URL:http://psbsgi1.nesdis.noaa.gov:8080/PSB/IMAGES/wefax.html.
NESDIS/IPD also produces an operational mapped GAC product which is known as the Global Vegetation Index Product. This product provides a means of monitoring the density and vigor of green vegetation over the growing areas of the Earth. Plate Carreé, polar stereographic and Mercator mosaics of the Global Vegetation Index, derived from AVHRR Channels 1, 2, plus coincident channels 4 and 5, and supporting information are produced weekly. For more information, see the NOAA Global Vegetation Index User's Guide, which is available from NCDC. For the latest maps of the various Global Vegetation Index Products, link to URL: http://psbsgi1.nesdis.noaa.gov:8080/PSB/IMAGES/gvi.html.
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