The study area had a size of of ~13 km x 70 km. Here, SMAP leverages the fact that RFI signal pulse rates are usually slower than SMAP’s radar pulse rate. Dara Entekhabi, the science team leader of NASA’s Soil Moisture Active Passive (SMAP) satellite, was selected by the American Geophysical Union (AGU) to receive the 2015 Hydrologic Sciences Award. Each magnetic torque assembly is internally redundant (via redundant windings) and magnetic field information can be provided via a ground-based model in the case of a magnetometer failure. Kent Kellogg will be the featured speaker May 11 when the La Cañada Flintridge Coordinating Council holds its annual Les Tupper Awards ceremony in von Karman Auditorium at the Jet Propulsion Laboratory. Scattering from the boom, solar panels, and other parts of the observatory structure affect the antenna pattern. Although SMAP was designed primarily to measure soil moisture, its radiometer is also able to measure sea surface salinity. The Level 1 products contain raw or calibrated and geolocated instrument measurements from the SMAP Radar and Radiometer; all Level 1 products have a temporal resolution of 49 minutes, the length of time required for the SMAP satellite to complete a half orbit of the Earth. The reactions wheels are oriented and sized so that a failure in an individual wheel can be tolerated. Following a data quality and team evaluation period, all data will be archived at a public website.The ComRAD (Combined Radar/Radiometer) microwave instrument system used in this investigation has been developed jointly by NASA/GSFC and George Washington University. The deployment of the mesh reflector antenna, which supports the collection of SMAP's radar and radiometer instrument measurements in space, marks a key milestone in commissioning the satellite. The radiometer measures microwave emissions for H and V polarization brightness temperatures, and provides 3rd and 4th stokes parameters that are used for RFI mitigation. On Sept. 24, 2008, SMAP was formally approved to initiate Phase A.- In 2011, the instrument system has completed the preliminary design review (PDR) stage, and detailed instrument design has begun.- In May 2012, SMAP successfully passed the Key Decision Point-C (KDP-C) review and is now in Phase C of the mission.- SMAP succesfully completed its CDR (Critical Design Review) in July, 2012.- In May 2013, a NASA team at GSFC delivered the SMAP radiometer to JPL where it will be integrated into the SMAP spacecraft along with the L-band radar (SAR) instrument developed by JPL. Precipitation and temperature are part of every weather forecast. In January 2007, the Panel on Water Resources and the Global Hydrologic Cycle of NRC (National Research Council) released a report “Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond” in which the SMAP mission was ranked with the highest priority among all proposed missions, and the report recommended it for implementation in the first phase of new missions (2010-2013).The overall objective of SMAP is to monitor global soil moisture mapping with unprecedented resolution, sensitivity, area coverage, and revisit times. The lowest elevation that PALS can operate at is determined by the minimum distance for radar data acquisition (~1000 m), which results in a spatial resolution of ~350 m cross-track and 650 m along-track for the low altitude flights. Achieving anomaly free performance over a large thermal range, however, carries a development risk due to potential for thermo-mechanically induced calibration shifts associated with internally calibrated radiometers; these have been observed in the prelaunch testing of SAC-D/Aquarius, Jason-2/AMR, and Juno/MWR. One of the key requirements for the thermal aspects of propulsion is to meet all range safety requirements.RF communications: The subsystem is composed of redundant S-band transponders for uplink/downlink command and telemetry functions to the NASA Earth Network and Space Network (single access mode). To detect and mitigate CW sources, the radiometer’s 24 MHz bandwidth is digitally filtered into 16 x 1.5 MHz subbands (Figure In addition to time/frequency discrimination, the radiometer digital subsystem will also compute the first through fourth moments of observed fields both in the 24 MHz “full-band” (i.e., 3.2 kHz) and 1.5 MHz “subband” (16 channel x 1 ms) datasets. This arrangement simplified the instrument design as well as overall control and fault protection design for the observatory; however, it places a constraint on the maximum spun momentum of the SIA of 364 Nms (at CDR the estimated spun momentum was 326 Nms).

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