Global Monthly Vegetation CoverReprint of Original Document |
Appendix: Frequently used acronyms and notations
AVHRR | Advanced Very High Resolution Radiometer |
BRDF | Bi-directional Reflectance Distribution Function |
GAC | Global Area Coverage |
GEWEX | Global Energy and Water Cycle Experiment |
GIMMS | Global Inventory Monitoring and Modeling Studies (at NASA) |
GVI | Global Vegetation Index (dataset) |
Ch1, Ch2 | Channels 1 and 2 of AVHRR |
standardized anomaly of variable V | |
IGBP | International Geosphere-Biosphere Programme |
ISLSCP | International Land Surface Satellite Climatology Project |
IR | Infrared |
LST | Land surface temperature |
LAI | Leaf area index |
NASA | National Aeronautics and Space Administration |
NOAA | National Oceanic and Atmospheric Administration |
NDVI | Normalized Difference Vegetation Index |
NESDIS | National Environmental Satellite Data and Information Service |
PWI | Precipitable water index |
QC | Quality/cloud flag |
REAF | Regional Empirical Angular Function |
Channel 1 (visible) and 2 (near-IR) bidirectional reflectances | |
T4, T5 | Channel 4 and 5 brightness temperatures |
TOA | Top-Of-Atmosphere |
X.Y/TS | X=1,2,3 (1-orbits, 2-daily maps, 3-composite maps)
Y=1,2,3,4,5 (1-calibrated, 2-QC flag appended, 3-atmospherically corrected, 4-surface BRDF-corrected, 5-transformed into geophysical parameter) TS mnemonics: T-time scale, S-spatial scale |