| definition
| - [Text Source: NASA Science Mission Directorate Homepage, http://nasascience.nasa.gov/missions/quikscat ]
QuikSCAT mission is intended to record sea-surface wind speed and direction data under all weather and cloud conditions over Earth's oceans. QuikSCAT was initiated as a "quick recovery" mission to help reduce the ocean-wind vector data gap created by the loss of the NASA Scatterometer (NSCAT) on the Japanese Advanced Earth Observing Satellite (ADEOS), which ceased functioning when ADEOS failed on June 30, 1997. QuikSCAT was launched from Vandenberg Air Force Base, Calif., aboard a Titan II vehicle, reducing the data gap by about one-half.
QuikSCAT operates in a near polar orbit. It flies in a circular orbit at an altitude of approximately 800 km (500 miles) above Earth's surface. It completes a full orbit in about 101 minutes, which translates to a little more than 14 orbits per day.
SeaWinds is the main instrument on the QuikSCAT satellite. SeaWinds is an active radar scatterometer. This scatterometer operates by transmitting high-frequency microwave pulses to the ocean surface and measuring the echoed radar pulses bounced back to the satellite. The scatterometer estimates wind speed and direction over the Earth's oceans at 10 m above the surface of the water. The instrument collects data over ocean, land, and ice in a continuous, 1,800-kilometer-wide band, making approximately 400,000 measurements and covering 90% of Earth's surface in one day. QuikSCAT can acquire hundreds of times more observations of surface wind velocity each day than can ships and buoys, and can provide continuous, accurate and high-resolution measurements of both wind speeds and direction regardless of weather conditions. This data is vital for global climate research, operational weather forecasting, and storm warning.
The SeaWinds scatterometer is providing unprecedented, frequent surface wind speed and direction measurements over the global oceans. Coupled with other satellite measurements of cloud patterns, water vapor and rain, the data are contributing to scientists' ability to predict the intensity, location and movements of hurricanes and other severe marine weather patterns.
Group: Platform_Details
Entry_ID: QUIKSCAT
Group: Platform_Identification
Platform_Category: Earth Observation Satellites
Short_Name: QUIKSCAT
Long_Name: Quick Recovery Scatterometer
End_Group
Group: Synonymous_Platform_Names
Short_Name: QUIKSCAT
End_Group
Group: Platform_Associated_Instruments
Short_Name: SEAWINDS
End_Group
Group: Orbit
Orbit_Altitude: 803 km
Orbit_Inclination: 98.6 degrees
Equator_Crossing: 6:00 p.m.
Period: 101 minutes
Perigee: 804 km (499 mi)
Apogee: 806 km (500 mi)
Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous
End_Group
Creation_Date: 2007-04-16
Online_Resource: http://winds.jpl.nasa.gov/missions/quikscat/index.cfm
Online_Resource: http://nasascience.nasa.gov/missions/quikscat
Group: Platform_Logistics
Launch_Date: 1999-06-19
Launch_Site: Vandenberg Air Force Base, USA
Design_Life: 3 years (exceeded)
Primary_Sponsor: USA/NASA
End_Group
End_Group (en)
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