Since 2002, Simpson Weather Associates has been funded by the Integrated Program Office (IPO), NSF and ONR to design, manage and participate in airborne and ground-based field programs to advance the use of wind data from Doppler lidar wind measuring systems. The integration of lidar technology with SWA's capabilities in atmospheric research makes us an unique resource to agencies interested in lidar wind measurements.
Airborne-Based Doppler Lidar
The Twin Otter Doppler Wind Lidar (TODWL) is an airborne DWL on ready for research operated by the PI and owned by the US Navy through its Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS). The instrument is installed in a Navy Twin Otter used for general atmospheric and oceanographic research. The lidar is a 2 micron coherent system. A defining capability of the TODWL is its ability to profile above, on and below the flight level. With its side door mounted, bi-axis scanner, the beam can be adaptively directed in a variety of scan patterns including conical, nadir stares and flight level stares.
- TODWL: An Airborne Doppler Wind Lidar for Atmospheric Research (pdf)
- Investigation of Flows Within Complex Terrain and Along Coastlines Using an Airborne Doppler Wind Lidar: Observations and Model Comparisons (pdf)
- Synergisms and comparisons between airborne Doppler Wind Lidar observations and other remote and in-situ wind measurements and model forecasts (pdf)
The P3 DWL uses the latest version of a coherent Doppler transceiver developed at Lockheed Martin Coherent Technologies. The scanner is a bi-axial scanner that enables pointing the beam in any direction within a +-30 degree azimuth window and +- 120 degree elevation window. The scanner design was critical to the success of the DWL’s participation in TPARC. The DWL was flown aboard a P3 aircraft in the western Pacific Ocean as part of the 2008 TPARC field experiment. One of the initial missions occurred on August 16th-17th, 2008 around Tropical Cyclone Nuri.
- Airborne Doppler Wind Lidar Investigations of Western Pacific Typhoon Genesis and Evolution(pdf)
Impact of airborne Doppler wind lidar profiles on numerical simulations of a tropical cyclone (pdf)
Ground-Based Doppler Lidar
The Tornado Wind Observing Lidar Facility (TWOLF) is a mobile ground based DWL used in the VORTEX2 field program. TWOLF used much of the TODWL system with exceptions of a hemispherical scanner borrowed from ARL and modified software for +- 125m/s wind measurements.
A Summary of Data Collected During Vortex2 by MWR-05XP/TWOLF, UMASS X-POL, and the UMASS W-Band Radar(pdf)
Doppler Wind Lidar Data Inventory (pdf)