Title :
Temporal and spatial resolution requirements for a soil moisture mission
Author :
Walker, Jeffrey P. ; Houser, P.R.
Author_Institution :
Hydrological Sci. Branch, NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
The temporal and spatial resolution requirements for a soil moisture mission are addressed through a synthetic identical twin data assimilation study. Simulations were made for observations with various temporal resolutions (1, 2, 3, 5, 10, 15, 20 and 30 days), and spatial resolutions (0.5, 6, 12 18, 30, 60 and 120 minutes of arc). It was found that daily observations of surface soil moisture achieved the best predictions of soil moisture and evapotranspiration, with the greatest impact of temporal resolution being for 1 to 5 days. It was also found that observations with a spatial resolution less than the model resolution produced the best results, with spatial resolutions greater than the model resolution yielding only a slight degradation
Keywords :
evaporation; hydrological techniques; moisture; remote sensing; soil; transpiration; evapotranspiration; soil moisture mission; spatial resolution requirements; synthetic identical twin data assimilation study; temporal resolution requirements; Atmospheric modeling; Degradation; Land surface; Soil measurements; Soil moisture; Spatial resolution; Surface soil; Surface topography; Surface treatment; Wavelength measurement;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.976040
