NOAA GVI GUIDE

Appendix O

Frequently used acronyms and notations

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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
edeltav.gif 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
erho1-2.gif 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

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