## 8 Concluding Remarks
\begin{table}
\begin{tabular}{l l} \hline
**Acronym** & **Definition** \\ \hline FPAR & Fraction of Photosynthetically Active Radiation \\ FRA & Forest Resources Assessment \\ FREL/FRL & Forest reference emission levels and forest reference levels \\ FVC & Fraction of Vegetation Cover \\ GEDI & Global Ecosystem Dynamics Investigation \\ GEE & Google Earth Engine \\ GEO & Group on Earth Observations \\ GFC & Global Forest Change \\ GFOI & The Global Forest Observations Initiative \\ GFW & Global Forest Watch \\ GHG & Greenhouse gas \\ GIMMS & Global Inventory Modeling and Mapping Studies \\ GLAD & Global Land Analysis and Discovery \\ GLAS & Geoscience Laser Altimeter System \\ GLC & Global Land Cover \\ GLCF & Global Land Cover Facility \\ GMW & Global Mangrove Watch \\ GOFC-GOLD & Global Observation of Forest Cover and Land Dynamics \\ GORT & Geometric Optical-Radiative Transfer \\ GPP & Gross Primary Production \\ GRACE & Gravity Recovery and Climate Experiment \\ GSFC & Goddard Space Flight Center \\ Gt & Gigatons \\ ha & hectare \\ ICESat & Ice, Cloud, and Land Elevation Satellite \\ IFL & Intact Forest Landscapes \\ InSAR & Interferometric synthetic-aperture radar \\ IPCC & Intergovernmental Panel on Climate Change \\ ISRO & Indian Space Research Organization \\ ISS & International Space Station \\ IUCN & International Union for Conservation of Nature \\ JAXA & Japan Aerospace Exploration Agency \\ JERS-1 & Japanese Earth Resources Satellite 1 \\ LAD & Leaf Area Density \\ LAI & Leaf Area Index \\ LAI & Leaf Area Index \\ LC & Land Cover \\ LCLU & Land Cover Land Use \\ LiDAR & Light Detection and Ranging \\ LPDAAC & Land Processes Distributed Active Archive Center \\ LSP & Land Surface Phenology \\ MERIS & Medium Resolution Imaging Spectrometer \\ MMU & Minimum Mapping Unit \\ MODIS & Moderate Resolution Imaging Spectroradiometer \\ MOLI & Multi-footprint Observation LiDAR and Imager \\ MRV & Measuring, Reporting and Verification \\ NASA & National Aeronautics and Space Administration \\ NASG & National Administration of Surveying, Mapping and Geoinformation of China \\ NDVI & Normalized difference vegetation index \\ NEP & Net Ecosystem Production \\ NIR & Near Infrared \\ NISAR & NASA-ISRO SAR \\ NOAA & National Oceanic and Atmospheric Administration \\ NPP & Net Primary Productivity \\ NPP & Net Primary Productivity \\ \hline \end{tabular}
\end{table} 
Table **A1**: _Cont._  
**Table A1. **_Cont._ \begin{tabular}{l l} \hline
**Acronym** & **Definition** \\ \hline PALSAR & Phased Array type L-band Synthetic Aperture Radar \\ PAR & Photosynthetically Active Radiation \\ PgC & Petagram of Carbon \\ PROBA-V & Project for On-Board Autonomy--Vegetation \\ PTC & Percent Tree Cover \\ QSCAT & Quick Scatterometer \\ RADAR & Radio Detection and Ranging \\ REDD & Reducing Emissions from Deforestation and Forest Degradation \\  & Reducing Emissions from Deforestation and Forest Degradation, and the role of conservation, \\ REDD+ & sustainable management of forests and enhancement of forest carbon stocks in \\  & developing countries \\ RMSE & Root Mean Square Error \\ SAOCOM & Argentinean SAtelite Argentino de Observacion Con Microondas \\ SAR & Synthetic Aperture Radar \\ SIF & Sun-Induced Chlorophyll Fluorescence \\ SLC & Scan Line Corrector \\ SPOT & Satellite Pour I'Observation de la Terre \\ SRTM & shuttle radar topography mission \\ SVM & Support Vector Machine \\ TLS & Terrestrial Laser Scanning \\ TRMM & Tropical Rainfall Measurement Mission \\ TWS & Terrestrial Water Storage \\ UAV & Unmanned Aerial Vehicle \\ UMD & University of Maryland \\ UNFCCC & United Nations Framework Convention on Climate Change \\ UNSPF & United Nations Strategic Plan for Forests \\ USGS & United States Geological Survey \\ VCF & Vegetation Continuous Fields \\ VFP & Vertical foliage Profile \\ VOP & Vegetation Optical Depth \\ WRI & World Resources Institute \\ \hline \end{tabular}