Home » Airborne Measurements » NASA Langley Airborne HSRL
NASA Langley Airborne HSRL
Dependendent upon synergy with NASA research objectives and other commitments.
Contact Chris Hostetler (Chris.A.Hostetler@nasa.gov, 757-864-5373), John Hair (Johnathan.W.Hair@nasa.gov, 757-864-1406), or Rich Ferrare (Richard.A.Ferrare@nasa.gov, 757-864-9443)
Airborne Measurements
High Spectral Resolution Lidar (HSRL) at 532 nm; standard backscatter lidar at 1064 nm; polarization sensitive at both 532 and 1064 nm.
Chris Hostetler
NASA Langley Research Center
Mail Stop 420 Hampton, VA 23681-2199
John Hair
NASA Langley Research Center
Mail Stop 401A
ManufacturerNASA Langley Research Center
DimensionsInstrument head: 48 cm wide x 76 cm long x 86 cm tall. Electronics rack: 53 cm wide x 64 cm deep x 130 cm tall
WeightHead: 110 kg. Rack: 200 kg.
Power Source Type900 W, 115 V, 60 Hz
Inlet Apertures40-cm diameter aperture
Heating/Cooling Requirements35 W cooling in steady state
Airspeed/Altitude RequirementsDependent upon experiment objectives.
Operators Required1
Ground RequirementsNone.
Suitable PlatformsTurbo-prop aircraft or jet. Typically fly on King Air B200. Has also flown on Lear 25C.
Data SystemNational Instruments PXI-based system.
Measured ParameterBackscatter at 532 and 1064 nm; extinction at 532 nm; depolarization at 532 and 1064 nm.
Measurement TechniqueHSRL technique for extinction and backscatter at 532 nm; standard backscatter technique at 1064 nm; standard depolarization technique.
Operational ModeEither nadir or zenith (not simultaneous)
Time ResolutionTypically 0.5 second for raw data; 10 sec for backscatter and depolarization; 60 sec for extinction at 532 nm.
Horizontal ResolutionDepends upon aircraft speed.
Other ResolutionVertical resolution: 30 m raw resolution; 30 m for aerosol backscatter and depolarization products and typically 300 m for extinnction product.
PrecisionDepends upon product, range, and conditions
AccuracyDepends upon product, range, and conditions
RangeSet by software; typically 15 km.
Calibration MethodInternally calibrated for 532 aerosol backscatter and extinction and depolarization; atmospheric calibration for 1064 aerosol backscatter using "clear" regions identified in 532 nm backscatter profile.
Hair, J.W., Hostetler, C.A., Cook, A.L.. Harper, D.B., Ferrare, R.A., Mack, T.L., Welch, W., Isquierdo, L.R., and Hovis. F.E.: Airborne high spectral resolution Lidar for profiling aerosol optical properties. Appl. Opt. 47, 6734-6752, 2008. Ferrare, R., C. Hostetler, J. Hair, A. Cook, D. Harper, S. Burton, M. Clayton, A. Clarke, P. Russell, J. Redemann, Airborne High Spectral Resolution Lidar Aerosol Measurements During MILAGRO and TEXAQS/GoMACCS, Ninth Conference on Atmospheric Chemistry, 2007 Annual AMS Conference, San Antonio, TX, January 2007, http://ams.confex.com/ams/pdfpapers/119758.pdf Rogers, R.R., Hair, J.W., Hostetler, C.A., Ferrare, R.A., Obland, M. D., Cook, A.L., Harper, D.B., Burton, S.P., Shinozuka, Y., McNaughton, C.S., Clarke, A. D., Redemann, J., Russell, P.B., Livingston, J.M., and Kleinman, L.: NASA LaRC airborne high spectral resolution lidar aerosol measurements during MILAGRO: observations and validation. Atmos. Chem. Phys. Discuss., 9, 8817-8856, 2009. Su, W., G. L. Schuster, N. G. Loeb, R. R. Rogers, R. A. Ferrare, C. A. Hostetler, J. W. Hair, and M. D. Obland (2008),Aerosol and cloud interaction observed from high spectral resolution lidar data, J. Geophys. Res., 113, D24202, doi:10.1029/2008JD010588.
As of September 2009, the instrument has logged over 700 flight hours and participated in 10 field missions. The data can be used for a variety of applications, including determining aerosol vertical distribution and PBL height; identifing aerosol type and partitioning aerosol optical depth by type (Ferrare et al, 2007); constraining estimates of aerosol radiative effects and mass burdens; and assessing the variation of aerosol properties as a function of distance from cloud (Su et al, 2008). Current installation on NASA King Air B200 allows simultaneous depolyment of the HSRL and the Research Scanning Polarimeter (NASA GISS) that is the aircraft prototype of the APS polarimeter on the Glory satellite that is to be launched in 2010. Together, these instruments can be used to retrieve aerosol and cloud optical, macrophysical, and microphysical properties. High altitude flight of the B200 platform in coordination with a lower altitude in situ platform has been found to provide optimal of advantage of the remote and in situ measurements for process studies.
27 Sep 2009 09:27