Start Date
15-10-2014 8:00 AM
Description
The ability to make more water available for domestic, agricultural, industrial and environmental uses will depend on better management of water resources, watersheds, and storm water runoff. To determine the quantity of runoff from a given watershed, several key pieces of information such as the soil moisture or antecedent moisture condition and surface storage must be accurately known. Recently NASA scientists have developed a new technique (modified GPS Delay Mapping Receiver -- DMR) which operates by recording the GPS signal reflected from the earth's surface and can be used to estimate the surface reflectivity (dielectric properties) for estimating changes in surface soil moisture. The DMR tracks and measures both direct Right-Hand_Circularly Polarized (RHCP) GPS signal and reflected Left-Hand_Circularly Polarized (LHCP) GPS signal at 1.575 GHz frequency.
Soil Moisture Mapping Utilizing Space-Based GPS Technology Developed by NASA
The ability to make more water available for domestic, agricultural, industrial and environmental uses will depend on better management of water resources, watersheds, and storm water runoff. To determine the quantity of runoff from a given watershed, several key pieces of information such as the soil moisture or antecedent moisture condition and surface storage must be accurately known. Recently NASA scientists have developed a new technique (modified GPS Delay Mapping Receiver -- DMR) which operates by recording the GPS signal reflected from the earth's surface and can be used to estimate the surface reflectivity (dielectric properties) for estimating changes in surface soil moisture. The DMR tracks and measures both direct Right-Hand_Circularly Polarized (RHCP) GPS signal and reflected Left-Hand_Circularly Polarized (LHCP) GPS signal at 1.575 GHz frequency.
