National Space Science and Technology Center



Excel file format for UAH doppler wind lidar data.Each sheet is for an hour of each day. 01_09 means Nov 1 for the 9:00UTC hour.Metadata is at the top of each sheet.Columns A-D are hidden & only used to generate plots. They are necessary or the plots will be empty.Column E is an index, (i3)Column F is decimal time in hours, (f9.6)Column G is azimuth in degrees, (f6.2)Column H is elevation in degrees, (f6.2)Radial velocity [m/s] is in columns J through AM starting at row 22, (f6.4)SNR+1 is in columns AO through BR starting at row 22, (f8.6)Beta [m-1 sr-1] is in columns BT through CW starting at row 22, (e12.6)Row 20 contains the gate numbers each for radial velocity, SNR+1, and betaRow 21 contains the center of the gate [m] each for radial velocity, SNR+1, and betaField test setup distances from doppler wind lidar:DistanceGatePad221m12/13Trees512m28/29Distrometer #1277m14/15Scatterometer mirror312m16/17Disdrometer #2421m23/24ICCD461m25/26Scan type:StareNumber of gates:30Range gate length (m):18Gate length (pts):6Pulses/ray:5000Altitude of measurement (center of gate) = (range gate + 0.5) * gate lengthAzimuth has been corrected with a declination of 1.39 degrees for true north.Nov 1, Screenshot was approximately 9:46 Nov 1, fog in sheet 01_09 at approximate times 9.70-9.75. The yellow band at 9.82-9.85 in the plot is when focal range was changed to infinity.Nov 2, screenshot was approximately 8:58Nov 2, sheet 02_08 has smoke at approximate times 8.8-9.0. No fog.Note: Nov 4 had no fog or smoke.To generate color plots, save an excel sheet as a csv file. Run the included python 3 program, read_lidarV2.pyIt will prompt for a filename. Use the base name without the ‘csv’ extention. The output plot name will be that filename with the ‘.png’ extension. You will need to have the python modules csv, numpy & matplotlib. The code is documented as to where you can get these if necessary.Files are available at: ................
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