rlprof > Raman LIDAR Vertical ProfilesVAP Type(s) > Baseline • Evaluation • Guest

Aerosol scattering ratio (left) and aerosol extinction (right).

The Raman lidar automatically attempts to reoptimize the position of the laser beam in the detector’s field of view every few hours (this is required for most narrow-field-of-view lidar systems). However, this can introduce alignment artifacts in the narrow-field-of-view data due to the way the detection channels are arranged on the optical bench. A suite of VAPs have been developed to reduce or remove any artifacts introduced in the narrow-field-of-view data by these automatic self-alignment “tweaks.” For more details, see each VAP process web page of the Raman Lidar Profiles:

  • Aerosol Scattering Ratio,
  • Best Estimate Product,
  • Depolarization Ratio,
  • Aerosol Extinction,
  • Mixing Ratio and Merge.

For more information about the Raman Lidar Profiles Best Estimate VAP (RLPROFBE), see the VAP report. For more information about the Raman Lidar Profiles Merge (RLPROFMERGE) VAP that is used as input to all the Raman Lidar Profiles VAPs, please see this report. For more information about the Raman Lidar Water Vapor Mixing Ratio and Temperature VAPs, see this report.


The data set represents output from a revised version of the Raman lidar temperature VAP, which will replace the older temperature VAP. We are currently working to get this VAP implemented operationally at the DMF. This will involve integrating the new code into ADI, which will likely take a few months to complete. In the meantime, we are making these new data available through the evaluation archive in order to enable access by the science community.


  • Fixed
  • AMF1
  • AMF2
  • AMF3


rl: Raman Lidar

Active Locations

Facility Name Start Date
Central Facility, Lamont, OK 1998-03-01
Graciosa Island, Azores, Portugal 2015-09-04

Data Details

Developed By Rob Newsom
Contact Rob Newsom
Resource(s) Data Directory
Data format netcdf
Site ENA
Content time range 1 March 1998 - 28 July 2021
Attribute accuracy No formal attribute accuracy tests were conducted.
Positional accuracy with GPS
Data Consistency and Completeness The data set contains bad values that have been flagged with -9999. Also, each of the primary variables has an associated precision (random uncertainty) variable. Users can identify and filter out poor-quality data by imposing a precision (or relative precision) threshold. A relative precision threshold of about 5% is effective at removing much of the poorer-quality measurements (see the quciklook images).
Access Restriction No access constraints are associated with this data.
Use Restriction No use constraints are associated with this data.
File naming convention Closely follows ARM standard, i.e., 10rlproftemp2news.c0


Newsom R and C Sivaraman. 2018. Raman Lidar Water Vapor Mixing Ratio and Temperature Value-Added Products. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-218.


Tridon F, A Battaglia, and D Watters. 2017. "Evaporation in action sensed by multiwavelength Doppler radars." Journal of Geophysical Research: Atmospheres, 122(17), 10.1002/2016JD025998.

Chen H, A Hodshire, J Ortega, J Greenberg, P McMurry, A Carlton, J Pierce, D Hanson, and J Smith. 2017. "Vertically resolved concentration and liquid water content of atmospheric nanoparticles at the US DOE Southern Great Plains site." Atmospheric Chemistry and Physics, 18(1), doi:10.5194/acp-18-311-2018.
Research Highlight


Lamer K and P Kollias. 2015. "Observations of fair-weather cumuli over land: Dynamical factors controlling cloud size and cover." Geophysical Research Letters, 42(20), 10.1002/2015gl064534.
Research Highlight


Jensen M, S Giangrande, and P Kollias. 2014. The Mid-latitude Continental Convective Clouds (MC3E) Experiment Final Campaign Report. Ed. by Robert Stafford, U.S. DOE, Office of Science, Office of Biological and Environmental Research. DOE/SC-ARM-14-012.


Zhang Y and SA Klein. 2013. "Factors Controlling the Vertical Extent of Fair-Weather Shallow Cumulus Clouds over Land: Investigation of Diurnal-Cycle Observations Collected at the ARM Southern Great Plains Site." Journal of the Atmospheric Sciences, 70(4), 10.1175/jas-d-12-0131.1.
Research Highlight

Sivaraman C. 2013. ARM Climate Research Facility Quarterly Value-Added Product Report October 01–December 31, 2012. U.S. Department of Energy. DOE/SC-ARM-13-002.


Newsom RK, C Sivaraman, and SA McFarlane. 2012. Raman Lidar Profiles–Temperature (RLPROFTEMP) Value-Added Product. U.S. Department of Energy. DOE/SC-ARM/TR-120.

Sivaraman C. 2012. ARM Climate Research Facility Quarterly Value-Added Product Report Fourth Quarter: July 1–September 30, 2012. U.S. Department of Energy. DOE/SC-ARM-12-022.

Sivaraman C. 2012. ARM Climate Research Facility Quarterly Value-Added Product Report Third Quarter: April 1–June 30, 2012. DOE ARM Climate Research Facility. DOE/SC-ARM-12-016.

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