Abstract
NASA's Airborne Microwave Observatory of Sub-canopy and Subsurface (AirMOSS) project, with more than 1200 flight hours of a P-band synthetic aperture radar (SAR), was completed in September 2015. The goal of this mission was to improve the estimates of the North American Net Ecosystem Exchange (NEE) through providing high-resolution observations of root zone soil moisture (RZSM) over nine regions representative of the major North American biomes. AirMOSS flights covered areas of approximately 100 km by 25 km containing FLUXNET tower sites in regions that ranged from boreal forests in Saskatchewan, Canada, to tropical forests in La Selva, Costa Rica. These sites are marked in Fig. 1.
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