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

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

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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