TWOLF Data README!!!!!

Hi Everyone. This folder contains all of the TWOLF data collected during the PECAN field project. Here is some important information:

TWOLF (Bluestein et al. 2014 http://dx.doi.org/10.1175/JTECH-D-13-00112.1) is a "mobile" doppler lidar and operated during the entire PECAN field project. Attached is a .txt file of the lat and lons of the deployments and the days that we operated. I believe the field catalog http://catalog.eol.ucar.edu/maps/pecan has the locations in case you can a nice display of where we were with respect to the other instruments. 

1. There are a combination of swp files and .dat files. The swp files contains RHIs and PPIs while the .dat files contains the vertical stares.

2. the file “file_desctip3.txt” has information about the columns of the .dat files so that one can plot the vertical stares.

3. The time switched from LST to UTC on July 3 (or 4 from a UTC standpoint). This was our mistake during the project.

4. The lat, lon, and heading data are included in the “TWOLF_LAT_LONS.txt” file. Note that the PPIs are corrected for heading, but the degree listed in the RHIs are not. Here is a simple conversion that one can use.

	Heading from 0 to 90:    Subtract 90 Degrees (or add 270 degrees)
	Heading from 90 to 180:  No correction needed
	Heading from 180 to 270: Add 90 Degrees
	Heading from 270 to 360: Add (or subtract) 180 degrees

5. Note that TWOLFs maximum range is 10km and reliably collected data out to 7km (depending on the number of scatterers). Also, in general, each PPI took between 4 and 6 minutes to complete. Generall, we scanned at 1 to 1.5 degrees per second (for RHIs too).

Hopefully this is all good. If there are any questions, please email me at dylanreif@ou.edu and I’ll get back to you as soon as I can.

June 2, 2016

Sample Data Set Citation:

Reif, Dylan, C. O'Handley, D. Emmitt, P. Buczynski, M. Chasteen, H. Bluestein, D. Parsons, B. Bluth, I PopStefanija. 2016. T-WOLF (Truck-Mounted Wind Observing Lidar Facility) Data, Version 1.0. Dataset available online from the UCAR/NCAR - Earth Observing Laboratory. 2016. http://dx.doi.org/10.5065/D6HQ3X8Q. Accessed 6 Jun 2016.