README VTMX 2000 from ASU This Web site contains data taken during the VTMX 2000 field campaign by the ASU Environmental Fluid Dynamics Group. Measurements were taken at the Mount Olivet Cemetery. Site: ACS (ASU Cemetery Site) Met. Tower: North 40.75315 West 111.84864 MSL: 1410m Trailer: North 40.75301 West 111.84848 MSL: 1410m Balloon 1: (tether sondes #2, #3, #4) North 40.75308 West 111.84905 MSL: 1409m Balloon 2: (tether sonde #1, DustTrack and Streaker) North 40.75245 West 111.84889 MSL: 1409m LT (Local Time) = UTC - 6 Instruments on the tower (height AGL): 1. Metek sonic anemometer at the top (13.87m) 2. Cup anemometer (7.26m) 3. NTC thermistor (6.9m) 4. Applied Technologies sonic anemometer (4.5m) 5. Radiometers (IR out and solar in) (3.2m) 6. Cup anemometer (2.0m) 7. NTC thermistor (1.8m) Instruments used on tethered balloons: 1. Tethersondes for measuring: -wind speed -wind direction -temperature -pressure -relative humidity 2. DustTrack 3. Particle Streaker Instruments on trailer's roof: 1. DustTrack 2. TEOM Tethered balloons were used only during the IOP periods. All other instruments were operating continuously. FILE STRUCTURE EXPLANATION: RawData: Raw data are data downloaded directly from the instruments, and thus are not interesting for users. Sonic Anemometers (Metek (13.87m AGL, 1423.87m MSL) and Applied Technologies (4.5m AGL, 1414.5m MSL)) Unified files: These files contain instantaneous data taken every 0.1 sec (10 Hz sampling rate). Files are named: Metek: umDDHHMM.dat (example um010035.dat) App. Tech.: uaDDHHMM.dat (example ua011630.dat) The file name represents the UTC time of the first data in the file. Because of the large file size they are compresed in zip format. Column 1 - Julian Day (UTC). January 1st at 0:00 (midnight December 31st) is 0.0 JDay. This means that January 1st at noon is 0.5 Jday. Column 2 - Year Column 3 - Month Column 4 - Day (UTC) Column 5 - Hour (UTC) Column 6 - Min Column 7 - Sec Column 8 - cSec (1/10 sec) Column 9 - Local Decimal Time (UTC - 6 hours) Column 10 - U component of wind velocity [m/s] Column 11 - V component of wind velocity [m/s] Column 12 - W component of wind velocity [m/s] Column 13 - temperature [deg C] AveragedData: Sonic Anemometers (Metek 13.87m AGL (=1423.87m MSL) and Applied Technologies 4.5m AGL (=1414.5m MSL)) Averaged files: Folder: /AveragedData Files are named: Metek: aumDDHHMM.txt (example aum010035.dat) App. Tech.: auaDDHHMM.dat (example aua010040.dat) These are 5 min averages. The file name represents the UTC time of the first data in the file. Column 1 - Julian Day (UTC) Column 2 - Year Column 3 - Month Column 4 - Day Column 5 - Hour (UTC) Column 6 - Minute Column 7 - Decimal Local Time Column 8 - Horizontal wind speed magnitude [m/s] Column 9 - Wind Direction [degree] Column 10 - Mean U wind component (west - east) [m/s] Column 11 - Mean V wind component (south - north) [m/s] Column 12 - Mean W wind component (down - up) [m/s] Column 13 - Mean temperature [deg C] Column 14 - U rms [m/s] Column 15 - V rms [m/s] Column 16 - W rms [m/s] Column 17 - T rms [deg C] Column 18 - friction velocity (u*) [m/s] Column 19 - heat flux (w't') [m/s K] Column 20 - Reynolds stress u'w' [m^2/s^2] Column 21 - Reynolds stress u'v' [m^2/s^2] Column 22 - Reynolds stress v'w' [m^2/s^2] Column 23 - Vertical momentum flux (((u'w')^2+(v'w')^2)^0.5) [m^2/s^2] In the folder WholePeriod all averaged sonic files are collected in two files: AveragedUpperSonic.txt (data from upper (Metek) sonic 13.87m AGL = 1423.87m MSL) and AveragedLowerSonic.txt (data from lower (AppliedTechnologies) sonic 4.5m AGL = 1414.5m MSL). OM-220 files: Files are named: (also in folder /AveragedData ) uoDDHHMM.dwd (example uo010030.dwd) These files contain data averaged over 5 minutes. The file name represents the UTC time of the first data in the file. Column 1 - Julian Day (UTC). January 1st at 0:00 (midnight December 31st) is 0.0 JDay. This means that January 1st at noon is 0.5 Jday. Column 2 - Year Column 3 - Month Column 4 - Day (UTC) Column 5 - Hour (UTC) Column 6 - Minute Column 7 - local time (decimal) (UTC - 6 hours) Column 8 - temperature measured at 1.8 m from the ground [deg C] Column 9 - temperature measured at 6.9 m from the ground [deg C] Column 10 - wind speed measured at 2.0 m from the ground [m/s] Column 11 - wind speed measured at 7.2 m from the ground [m/s] Column 12 - incoming solar radiation [W/m^2] Column 13 - outgoing radiation [W/m^2] Column 14 - net radiation (IN minus OUT) [W/m^2] NOTE: Thermistors that were used for measuring temperature for column 8 and 9 didn't have good radiation protection, and for that reason these values during the daytime could not be accurate. In the folder WholePeriod all files are collected into file Tower.txt. TethersondeData: Files are named: MMDDHHMM.dat The file name represents the UTC time of the first data in the file. Column 1 - Sonde number. Sonde No. 1 was most of the IOP's on balloon 2 together with streaker and dusttrack. It was partly dameged for wind speed sensor after accident on IPO2 Sondes 2,3,and 4 were used on balloon 1. Column 2 - MSL altitude Column 3 - Elapsed time from initialisation of the sonde [s] Column 4 - Pressure [mBar] Column 5 - Temperature [deg C] Column 6 - Relative humidity [%] Column 7 - Wind Speed [m/s] Column 8 - Wind Direction [deg] Column 9 - Battery voltage [v] Column 10 - UTC time - if first time in the file is not in agrement with file name, use file name time and elapsed time (column 3) for calculation of actual time DustTrackData Roof: Files are named: DRDDMMHHMM.txt (DR stands for DusttrackRoof, DD for day, MM for month, HH for hour and agaim MM but now for minutes) These files contain data averaged over 1 minute. The file name represents the UTC time of the first data in the file. Data are in the following format: dd/mm/yyyy,hh:mm:ss,Concentration of PM10 [mg/m^3] Baloon: Dusttrack date from the baloon, if available, are in the tethersonde subdirectory ./DUST for each IOP. Flies are named DBDDMMHHMM.txt (DB stands for DusttrackBaloon, DD for day, MM for month, HH for hour and agaim MM but now for minutes) These files contain data averaged over 1 minute. The file name represents the UTC time of the first data in the file. Some explanation for each experiment is in the header of each data file. TEOM data for two periods are collected in ./TEOM directory Some explanation is in the header of the data files. ------------------------------------------------------------------------- Some graphs made from our data are collected in the ./Plots subdirectory ------------------------------------------------------------------------- Additional informations, raw data, maps, photos and graphs can be found at the VTMX web site: (maintained by T. Kowalewski) and (maintained by ASU). ========================================================================= Data contained in this CD arise from VTMX 2000 campaign. The data is intended to be used primarely by the program participants. The data may also be used for research and educational purposes. To use the data the appropriate acknowledgment should be given to the persons in any publications that result. "Appropriate" may range from co-authorship to simple inclusion in an acknowledgment section. Any uses of the data must receive approval from ASU/EDF (Prof H.J.S. Fernando, j.fernando@asu.edu). (ASU - Arizona State University, EFD - Environmental Fluid Dynamics program) Questions should be directed to: Tomasz Kowalewski, tkowale@ippt.gov.pl Marko Princevac, markop@asu.edu January, 2002