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The coplane analysis technique for three-dimensional wind retrieval using the hiwrap airborne doppler radar
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Guimond, Stephen R. Heymsfield, Gerald M. Tian, Lin Didlake Jr., Anthony C. |
| Copyright Year | 2015 |
| Description | The coplane analysis technique for mapping the three-dimensional wind field of precipitating systems is applied to the NASA High Altitude Wind and Rain Airborne Profiler (HIWRAP). HIWRAP is a dual-frequency Doppler radar system with two downward pointing and conically scanning beams. The coplane technique interpolates radar measurements to a natural coordinate frame, directly solves for two wind components, and integrates the mass continuity equation to retrieve the unobserved third wind component. This technique is tested using a model simulation of a hurricane and compared to a global optimization retrieval. The coplane method produced lower errors for the cross-track and vertical wind components, while the global optimization method produced lower errors for the along-track wind component. Cross-track and vertical wind errors were dependent upon the accuracy of the estimated boundary condition winds near the surface and at nadir, which were derived by making certain assumptions about the vertical velocity field. The coplane technique was then applied successfully to HIWRAP observations of Hurricane Ingrid (2013). Unlike the global optimization method, the coplane analysis allows for a transparent connection between the radar observations and specific analysis results. With this ability, small-scale features can be analyzed more adequately and erroneous radar measurements can be identified more easily. |
| File Size | 5719643 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150011449 |
| Archival Resource Key | ark:/13960/t6159kw50 |
| Language | English |
| Publisher Date | 2015-03-01 |
| Access Restriction | Open |
| Subject Keyword | Hiwrap Airborne Doppler Radar Three-dimensional Wind Retrieval Coplane Analysis Technique Errors Airborne Equipment Rain Simulation Continuity Equation Wind Velocity Radar Tracking Hurricanes Doppler Radar Velocity Distribution Radar Measurement Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
