1 / 19

OC3522 - Remote Sensing of the Atmosphere and Ocean - Summer 2001

OC3522 - Remote Sensing of the Atmosphere and Ocean - Summer 2001. Scatterometer. s 0 increases with increasing wind speed for scatterometer angles. increased wind speed. Seasat Scatterometer Pattern. Scatterometer antennas. cross. downwind. cross. upwind. q = 25 o.

quintin-hollis
Download Presentation

OC3522 - Remote Sensing of the Atmosphere and Ocean - Summer 2001

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. OC3522 - Remote Sensing of the Atmosphere and Ocean - Summer 2001 Scatterometer

  2. s0 increases with increasing wind speed for scatterometer angles increasedwind speed

  3. Seasat Scatterometer Pattern Scatterometerantennas

  4. cross downwind cross upwind q = 25o primary max s0 wind min s0 A single measure of s0at some unknown angle relative to the wind direction produces a set of possible speeds and directions secondary max s0

  5. s (q +90) 4 possible solutions 3 possible solutions 1 solution (note here q is used for azimuth)

  6. Vector selection:consistency with the pressure field or consistency within a model analysis (continuity)

  7. s (q +20) Now the solution collapses to two possible wind vectors What if a third view direction is added (q+20o)

  8. The NASA Scatterometer (NSCAT) was launched on September 15, 1996, measuring global ocean surface wind velocity (both speed and direction). More than 9 months of observations are available. NSCAT • The instrument was operated continuously at a frequency of 13.995 Giga Hertz. • Six dual-polarized, 3-meter long, stick-like antennas collected backscatter data with a resolution of 50 km for nine months before loss. • Backscatter data was combined and processed to yield 268,000 globally distributed wind vectors per day.

  9. NSCAT Coverage

  10. http://manati.wwb.noaa.gov/cgi-bin/qscat_ocean.pl

  11. http://www.eorc.nasda.go.jp/ADEOS/FirstImages/images/P47491.gifhttp://www.eorc.nasda.go.jp/ADEOS/FirstImages/images/P47491.gif

  12. January July

  13. Interesting Scatterometer sites: NASA Scatterometer Data Scatterometer Missions “NASA's Quick Scatterometer (QuikSCAT) was lofted into space at 7:15 p.m. Pacific Daylight Time on Saturday (6/19/99) atop a U.S. Air Force Titan II launch vehicle from Space Launch Complex 4 West at California's Vandenberg Air Force Base. The satellite was launched in a south-southwesterly direction, soaring over the Pacific Ocean at sunset as it ascended into space to achieve an initial elliptical orbit with a maximum altitude of about 800 kilometers (500 miles) above Earth's surface.” New Scatterometer SeaWinds on QuickSCAT And Data

More Related