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Prior to QuikSCAT, marine forecasters at the OPC made warning and forecast decisions over vast ocean areas based on a limited number of conventional observations or on the satellite presentation of a storm system. 0000003261 00000 n This study documents the impact that the DFS instrument would have on different National Weather Service (NWS) weather forecasting and warning products and services. The instrument is an active microwave radar (a conically scanning pencil-beam scatterometer) with dual-beam, 40º (inner beam) and 46º look angle from nadir (outer beam), conical scan 1 m diameter reflector (rotating dish) antenna, operating in Ku-band at 13.402 GHz (nominal peak power of pulse =110 W, 189 Hz PRF (Pulse Repetition Frequency). Then, for another nine years, it served as the gold standard of accuracy against which new spaceborne scatterometers were calibrated.

- Managed by NASA's Jet Propulsion Laboratory in Pasadena, California, QuikSCAT was a unique national resource that far surpassed NASA's original science objective for the mission.

12), In June 2011, the NASA Earth Science Senior Review recommended an extension of the QuikSCAT mission for cross-calibration services of OSCAT and ASCAT up to 2013. The spacecraft uses a BCP 2000 (Ball Commercial Platform) series bus with dimensions: 2.2 m x 1.7 m x 1.4 m. The bus structure is made of aluminum honeycomb panels tied together by comer posts made of extruded aluminum. This approach is viewed as the optimal way to continue the science- and climate-quality data record, since the ISRO mission is directed at near real time operational applications. The new method allows researchers to pinpoint just that. The measurements are obtained through the processing of scatterometer data originating from the ASCAT instrument on EUMETSAT's Metop-C satellite, as described in … The Senior Review was tasked with reviewing proposals submitted by each mission team for extended operations and funding for FY14-FY15, and FY16-FY17. • To study daily/seasonal sea ice edge movement and Arctic/Antarctic ice pack changes. Note: The ISS-RapidScat instrument is a speedy and cost-effective replacement for NASA's QuikSCAT Earth satellite. a) QuikSCAT discovered that hurricane-strength winds occur frequently in the North Atlantic and North Pacific oceans, where such strong winds were not previously expected to exist.

Inverted scatterometer winds are ambiguous and Stoffelen (2000) presents a generic method for assimilating ambiguous scatterometer winds, using wind retrieval accuracy and solution probability information, exploited also in the KNMI ambiguity removal. "There are so many definitions of urban extent, both legislative and administrative," Nghiem pointed out. • NOAA has been receiving day-old OSCAT data via the ISRO dedicated FTP server since September 2010. JPL's NSCAT/SeaWinds Program Office has been assigned responsibility and provides overall project management, as well as science, ground processing systems, and the SeaWinds instrument. The hypothesis is that the NRCS images will prove useful in certain • Since the QuikSCAT spacecraft and the scatterometer instrument (SeaWinds) themselves remained in otherwise good health after the spin mechanism failure, the scatterometer now tracks an operational data path swath significantly reduced from its original capability (the instrument is still producing data along its pencil beam). Spacecraft    Launch    Mission Status    Sensor Complement   Ground Segment   References. Product quality Figure 2 shows that the probability of a SeaWinds solution is much more meaningful, i.e.

The NASA/GSFC contract to Ball was awarded under its new Rapid Spacecraft Acquisition (RSA) procurement program. the Ross Ice Shelf, South Georgia Island and the Weddell Sea. 16), - While NASA and NOAA provided the QuikSCAT Ku-band scatterometer observations to the to the international operational ice monitoring community for the past decade - the new NASA/NOAA agreement with ISRO, reached in 2010, makes near-real-time, routine access to Oceansat-2 scatterometer (OSCAT) Level-1B data available. brighter means higher backscattered power levels, which in ocean scenes The QuikSCAT mission was launched with a two-year mission goal. 1) 2), • To acquire all-weather, high-resolution measurements of near-surface winds over global oceans, • To determine atmospheric forcing, ocean response, and air-sea interaction mechanisms on various spatial and temporal scales, • To combine wind data with measurements from scientific instruments in other disciplines to help us better understand the mechanisms of global climate change and weather patterns. The ASCAT Wind Product contains measurements of the wind direction and wind speed above the sea surface.

Data processing in the QuikSCAT ground segment: The QuikSCAT NRT (Near-Real-Time) processing of SeaWinds data is being provided at NOAA/NESDIS (operational since February 2000). Mission status: • October 12, 2018: Launched in June 1999 for an intended two-year mission, NASA's SeaWinds scatterometer instrument on the QuikSCAT spacecraft was turned off on 2 October 2018 in accordance with its end-of-mission plan. Only the wind parameter has operational status - the soil moisture parameter (from the H SAF) currently has demonstration status. 10), • June 2013: The 2013 Senior Review evaluated 13 NASA satellite missions in extended operations: ACRIMSAT, Aqua, Aura, CALIPSO, CloudSat, EO-1, GRACE, Jason-1, OSTM, QuikSCAT, SORCE, Terra, and TRMM.

It has proven particularly invaluable in gaging the location, size and strength of hurricanes in the open ocean, far from land-based radars and outside the range of reconnaissance aircraft. Like all radars, QuikSCAT sent pulses of microwaves toward Earth and recorded the waves that bounced back, called backscatter. Instrument mass = 205 kg; power = 250 W (orbital average); duty cycle = 100%; average data rate = 40 kbit/s; thermal operating range is 5-40ºC; pointing knowledge to 500 arcseconds. These organizations' decision to assimilate and turn QuikSCAT data into operational information culminates an intense inter-agency and international cooperative effort among NASA, NOAA, and European countries to demonstrate and validate QuikSCAT's potential impact on weather forecasting. Just click on the desired geographical Applications: studies of tropospheric dynamics and air-sea interaction processes, including air-sea momentum transfer. The more, larger or taller the buildings are, the stronger the backscatter. storms become available, and the imagery is updated shortly after receipt 4.10 SEAWINDS NEAR-REAL-TIME SCATTEROMETER WINDS FOR AWIPS Jeffrey M. Augenbaum* and Raymond W. Luczak Computer Sciences Corporation, Suitland, MD Gene Legg NOAA/NESDIS, Suitland, MD 1 INTRODUCTION NOAA/NESDIS produces a suite of near-real-time (NRT) wind vector and daily ice products from the QuikSCAT and ADEOS-II SeaWinds Scatterometer

The success of QuikSCAT in OPC operations is due to the wide 1800 km swath width, large retrievable wind speed range ( 0 to in excess of 30 m/s), ability to view QuikSCAT winds in a comprehensive form in operational workstations, and reliable near-real-time delivery of data. inconclusive. The propulsion system uses anhydrous hydrazine (N2H4) blowdown. The activator assembly provides very accurate spin control and precise position or pointing information to the CDS (Command and Data Subsystem). radar cross-section to the ocean surface wind speed and direction. Please Note: The QuikSCAT is a NASA ESE (Earth Science Enterprise) program satellite built by BATC (Ball Aerospace & Technologies Corporation) of Boulder, CO.

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