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The Soil Moisture Active/Passive (SMAP) mission has the scientific objective of measuring both soil moisture and freeze/thaw state from space. The mission will make both active radar and passive radiometer measurements at L-band in order to retrieve soil moisture. Some studies, however, indicated that these measurements are susceptible to radio frequency interference (RFI) in several geographic locations...
The Soil Moisture Active/Passive (SMAP) mission is a NASA mission identified by the NRC ldquodecadal surveyrdquo to measure both soil moisture and freeze/thaw state from space. The mission will use both active radar and passive radiometer instruments at L-Band. In order to achieve a wide swath at sufficiently high resolution for both active and passive channels, an instrument architecture that uses...
This paper presents a designs for a scatterometer satisfying the performance requirements set by the National Research Council Decadal Review in its description of the Extended Ocean Vector Winds Mission (XOVWM). Our design consists of a Ku and C-band pencil-beam scatterometer system coupled with an X-band polarimetric radiometer. Multiple frequencies allow us to achieve all winds and all-weather...
This article describes the upgraded PALS instrument and the characteristics of data acquired from the Cloud Land Atmospheric Interaction Campaign (CLASIC) 2007. The data acquired over lake passes were used to remove the radiometer calibration bias. The calibrated radiometer data showed significant consistency with the L-band land emission model for soil surfaces published in the literature. We observed...
The soil moisture active/passive (SMAP) mission is a NASA mission identified by the NRC ldquodecadal surveyrdquo to measure both soil moisture and freeze/thaw state from space. The mission will use both active radar and passive radiometer instruments at L-band. In order to achieve a wide swath at sufficiently high resolution for both active and passive channels, an instrument architecture that uses...
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