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GPM Ground Validation UND Citation Navigation Data IPHEx Table of Contents
The GPM Ground Validation UND Citation Navigation Data IPHEx dataset consists of final processed files containing records that include flight time, aircraft location (latitude, longitude, altitude), air temperature, wind speed, and other relevant parameters from the GPM Integrated Precipitation and Hydrology Experiment (IPHEx) campaign. The IPHEx campaign took place in North Carolina from May 1, 2014 to June 13, 2014. The Cessna Citation II Research aircraft, owned and operated by the University of North Dakota (UND), participated in the IPHEx campaign by serving as an in situ microphysics sampling platform. CitationThe following example shows how to cite the use of this dataset in a publication. For more information, please see our Citing GHRC DAAC and Data page. Campaign The GPM Integrated Precipitation and Hydrology Experiment (IPHEx) occurred in North Carolina during the spring season of 2014. The field campaign had two primary goals. The first was to evaluate how well observations from precipitation-monitoring satellites, including the recently launched GPM Core Observatory, match up to the best estimate of the true precipitation measured at ground level and how that precipitation is distributed in clouds. The second was to use the collected precipitation data to evaluate models that describe and predict the hydrology of the region. For IPHEx, the UND Citation flew in close coordination with NASA's ER-2 aircraft. The UND Citation data served as a reference microphysics data set for assessing the scattering of precipitation viewed within the swath of the ER-2's instruments. Further details on the IPHEx campaign are available at http://pmm.nasa.gov/iphex. Information on the Global Precipitation Measurement (GPM) mission is available at http://pmm.nasa.gov/GPM. Instrument DescriptionThe Cessna Citation II Research Aircraft is owned and operated by the University of North Dakota (UND). The Citation II is a twin-engine fanjet with an operating ceiling of 43,000 feet (13.1 km). The turbofan engines provide sufficient power to cruise at speeds of up to 340 knots (175 m/s) or climb at 3300 feet per minute (16.8 m/s). These high performance capabilities are accompanied by relatively low fuel consumption at all altitudes which gives the Citation an on-station time of 3-5 hours depending on the mission type. Long wings allow the Citation to be operated out of relatively short airstrips and to be flown at lower speeds (140 kts or 72 m/s) necessary for many types of measurements. The Citation is certified for flight into known icing conditions. Further details on the UND Cessna Citation II are available at http://citation.atmos.und.edu/. InvestigatorsMichael Poellot Andrew Heymsfield David Delene The UND Citation Navigation data files are ASCII text files and are named with the following convention:
where,
A PDF document is also included in the data files and is named with the following convention:
The PDF document outlines the flight date, flight start and stop times, and the type of precipitation event observed. Data FormatThe GPM Ground Validation UND Citation Navigation Data IPHEx data set consists of ASCII (.txt) files. The .txt files from UND contain a header followed by rows of data. Additional details on the data format of the files can be found at http://citation.atmos.und.edu/dataformat.aspx. Delene, D. J., Aircraft Data Processing and Analysis Software Package, Earth Science Informatics, 1-16, 2010, DOI URL: http://dx.doi.org/10.1007/s12145-010-0061-4, DOI: 10.1007/s12145-010-0061-4. Contact InformationTo order these data or for further information, please contact:
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