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GRIP Doppler Aerosol WiNd lidar (DAWN) Table of Contents
The Doppler Aerosol WiNd (DAWN), a pulsed lidar, operated aboard a NASA DC-8 aircraft during the Genesis and Rapid Intensification Processes (GRIP) field campaign. Data values include LOS Winds, calculated vertical profiles of horizontal wind velocity, frequency-domain signal energy and time versus latitude and longitude. Data was gathered over the Atlantic Ocean. CampaignThe Genesis and Rapid Intensification Processes (GRIP) experiment was a NASA Earth science field experiment conducted August 5 to September 30, 2010. The major goal was to better understand how tropical storms form and develop into major hurricanes. NASA used the DC-8 aircraft, the WB-57 aircraft and the Global Hawk Unmanned Airborne System (UAS), configured with a suite of in situ and remote sensing instruments that were used to observe and characterize the lifecycle of hurricanes. This campaign also capitalized on a number of ground networks and space-based assets, in addition to the instruments deployed on aircraft from Ft. Lauderdale, Florida ( DC-8), Houston, Texas (WB-57), and NASA Dryden Flight Research Center, California (Global Hawk). More information about this Campaign can be found on the GRIP web site: https://ghrc.nsstc.nasa.gov/home/field-campaigns/grip Instrument DescriptionThe Doppler Aerosol WiNd (DAWN) lidar is a pulsed, 2-micron, coherent-detection system which is monaxial when properly aligned. The lidar system has an onboard laser beam scanner. The angle from the laser beam to nadir is fixed at 30.12 degrees, and the aircraft forward-right-down (FRD) coordinate system is used. The data collection time at each azimuth angle is programmable. For GRIP, two seconds was primarily used, which is equivalent to 20 laser shots. Processed data presently uses two azimuth angles, -45 and +45 degrees, to calculate the horizontal wind velocity. Each LOS wind profile vs. range had a two second measurement time and about a four second repeat time. Additional details on the instrument can be found in DAWNWindLidarDataDescription-General.doc. InvestigatorsDr. Michael J. Kavaya Dr. Robert M. Atlas, Director Dr. G. David Emmitt, President Data and browse files are of the form:
where
Further information on the file naming convention is provided in DAWNGRIPDataFileNamingConvention.doc. Data FormatThe Doppler Aerosol WiNd (DAWN) lidar dataset consists of ASCII (.txt) files and plots (.jpg). There are four data files: horizontal wind speed, horizontal wind direction, frequency-domain signal energy, time vs. latitude vs. longitude. The first three provide key processed parameters vs. altiude vs. time. The other file permits the first three parameters to be correctly associated with latitude and longitude. Further information on the data files is provided in DAWNDataFilesDescription.doc. The plots are available to browse before using the data. CitationOur data sets are provided through the NASA Earth Science Data and Information System (ESDIS) Project and the Global Hydrology Resource Center (GHRC) Distributed Active Archive Center (DAAC). GHRC DAAC is one of NASA's Earth Observing System Data and Information System (EOSDIS) data centers that are part of the ESDIS project. ESDIS data are not copyrighted; however, in the event that you publish our data or results derived by using our data, we request that you include an acknowledgment within the text of the article and a citation on your reference list. Examples for general acknowledgments, data set citation in a reference listing, and crediting online web images and information can be found at: http://ghrc.nsstc.nasa.gov/uso/citation.html References are available in the CitationsRegardingDAWN.doc document. Contact InformationTo order these data or for further information, please contact:
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