Results 101 to 110 of about 20,430 (225)

Development of a Compact, Pulsed, 2-Micron, Coherent-Detection, Doppler Wind Lidar Transceiver; and Plans for Flights on NASA's DC-8 and WB-57 Aircraft [PDF]

, 2009
We present results of a recently completed effort to design, fabricate, and demonstrate a compact lidar transceiver for coherent-detection lidar profiling of winds.
Kavaya, Michael J., Koch, Grady J., Petros, Mulugeta, Petzar, Paul J., Singh, Upendra N., Trieu, Bo C., Yu, Jirong   +6 more
core   +1 more source

Analysis of intrapulse chirp in CO2 oscillators [PDF]

Pulsed single-frequency CO2 laser oscillators are often used as transmitters for coherent lidar applications. These oscillators suffer from intrapulse chirp, or dynamic frequency shifting.
Berger, Russell G., Moody, Stephen E., Thayer, William J., III   +2 more
core   +1 more source

Lidar Characterization of Boundary Layer Transport and Mixing for Estimating Urban-Scale Greenhouse Gas Emissions

EPJ Web of Conferences, 2016
A compact commercial Doppler lidar has been deployed in Indianapolis for two years to measure wind profiles and mixing layer properties as part of project to improve greenhouse measurements from large area sources.
Hardesty R. Michael, Brewer W. Alan, Sandberg Scott P., Weickmann Ann M., Shepson Paul B., Cambaliza Maria, Heimburger Alexie, Davis Kenneth J., Lauvaux Thomas, Miles Natasha L., Sarmiento Daniel P., Deng A. J., Gaudet Brian, Karion Anna, Sweeney Colm, Whetstone James   +15 more
doaj   +1 more source

Entanglement-Enhanced Lidars for Simultaneous Range and Velocity Measurements

, 2017
Lidar is a well known optical technology for measuring a target's range and radial velocity. We describe two lidar systems that use entanglement between transmitted signals and retained idlers to obtain significant quantum enhancements in simultaneous ...
Shapiro, Jeffrey H., Zhang, Zheshen, Zhuang, Quntao   +2 more
core   +1 more source

Doppler lidar signal and turbulence study [PDF]

Wind fields were measured with the ground-based NASA/MSFC lidar are compared with the in situ NASA RB-57 aircraft measurements. The mean wind fields, the turbulence intensities, and the turbulence spectra determined from measurements by both systems are ...
Frost, W., Huang, K. H.
core   +1 more source

Wavelet Deconvolution in a Periodic Setting with Long-Range Dependent Errors

, 2012
In this paper, a hard thresholding wavelet estimator is constructed for a deconvolution model in a periodic setting that has long-range dependent noise. The estimation paradigm is based on a maxiset method that attains a near optimal rate of convergence ...
Wishart, Justin Rory
core   +1 more source

Dual-Frequency Doppler LiDAR Based on External Optical Feedback Effect in a Laser. [PDF]

Sensors (Basel), 2020
Chen Z, Yu Y, Ruan Y, Nie B, Xi J, Guo Q, Tong J.   +6 more
europepmc   +1 more source

Pulsed Doppler lidar for the detection of turbulence in clear air [PDF]

A pulsed C02 Doppler lidar system is described and demonstration tests in ground-based and airborne flight operations are discussed. As a ground-based system, it can detect wind shears in thunderstorm gust fronts to a range of 6 km.
Bilbro, J. W., Dimarzio, C. A., Dunkin, J. A., Harris, C. E., Johnson, S. C., Jones, W. D., Weaver, E. A.   +6 more
core   +1 more source

Atmospheric aerosol and Doppler lidar studies [PDF]

Experimental and theoretical studies were performed of atmospheric aerosol backscatter and atmospheric dynamics with Doppler lidar as a primary tool. Activities include field and laboratory measurement and analysis efforts.
Bowdle, D. A., Cutten, D., Jarzembski, M., Mccaul, E. W., Jr., Rothermel, Jeff, Srivastava, V.   +5 more
core   +1 more source

Rain Measurement Using Nacelle-Mounted Doppler Lidar

IEEE Transactions on Geoscience and Remote Sensing
Rain measurements based on the remote sensing technique play an important role in many fields. In this paper, the DTU-developed continuous-wave SpinnerLidar, deployed on top of a wind turbine, is used to investigate the feasibility of rain measurement.
Xiaoying Liu, Charlotte Bay Hasager, Jakob Mann, Mikael Sjöholm, Songhua Wu   +4 more
openaire   +2 more sources