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Requirements and technology advances for global wind measurement with a coherent lidar: a shrinking gap
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Emmitt, G. David Kavaya, Michael J. Amzajerdian, Farzin Yu, Jirong Koch, Grady J. Singh, Upendra N. |
| Copyright Year | 2007 |
| Description | Early concepts to globally measure vertical profiles of vector horizontal wind from space planned on an orbit height of 525 km, a single pulsed coherent Doppler lidar system to cover the full troposphere, and a continuously rotating telescope/scanner that mandated a vertical line of sight wind profile from each laser shot. Under these conditions system studies found that laser pulse energies of approximately 20 J at 10 Hz pulse repetition rate with a rotating telescope diameter of approximately 1.5 m was required. Further requirements to use solid state laser technology and an eyesafe wavelength led to the relatively new 2-micron solid state laser. With demonstrated pulse energies near 20 mJ at 5 Hz, and no demonstration of a rotating telescope maintaining diffraction limited performance in space, the technology gap between requirements and demonstration was formidable. Fortunately the involved scientists and engineers set out to reduce the gap, and through a combination of clever ideas and technology advances over the last 15 years, they have succeeded. This paper will detail the gap reducing factors and will present the current status. |
| File Size | 1504454 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070031576 |
| Archival Resource Key | ark:/13960/t80k7bs0z |
| Language | English |
| Publisher Date | 2007-08-26 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Meteorological Satellites Troposphere Wind Measurement Satellite Observation Wind Profiles Doppler Radar Laser Applications Optical Radar Line of Sight Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
