TITLE: Mesonet Texas West Texas Mesonet Data [Texas Tech] CONTACTS: Steve Williams P.O. Box 3000 Boulder CO 80307-3000 Email sfw@ucar.edu 303-497-8164 (voice) 970-491-8293 (fax) 1.0 DATA SET OVERVIEW This data set contains 5-minute resolution surface meteorological data from the West Texas Mesonet operated by Texas Tech. The West Texas Mesonet includes 31 stations in the region around Lubbock, Texas. This data set covers the period from 1 May to 30 June 2002. The data are in comma-delimited ASCII format. 2.0 INSTRUMENT DESCRIPTION 2.1 Instrumentation Each mesonet station consists of a fenced 10x10 meter plot of land, 10 meter tower, solar panel, RF modem and antenna. Instrumentation for a basic mesonet station follows: 10 meter wind speed and direction - R.M. Young 05103-L Wind Monitor. The unit will measure up to 65 m/s. 9 meter self aspirated air temperature - Used in Heat Flux. Campbell Scientific 107-L. Measurement range of the unit is -35 to +50 C. 2 meter self aspirated air temperature - Used in Heat Flux. Campbell Scientific 107-L. 2 meter wind speed - R.M. Young Wind Sentry. Measurement range of 0 to 40 m/s. 1.5 meter temperature/relative humidity probe - Vaisala HMP45C. Measurement range of the unit for temperature is -40 to +60 C. digital barometer - Vaisala PTB220 Digital Barometer. tipping bucket rain gauge - Hydrological Services TB3 Siphon Tipping Bucket Gauge. dewpoint - derived by using the measured parameters. Solar Radiation - Kipp and Zonen pyranometers. Some stations use CM-3 units, most use SP-Lite Pyranometers. All measure accumulated solar radiation in W/m2. For the daily value add all the 5-minute observations. All values start at zero for the pyranometer data. Soil temperature sensors - Campbell Scientific 107-L Temperature probe. Measurements range from -35 to +50 C. All soil temperature probes are the same. soil water content reflectometers - Campbell Scientific Water Content Reflectometer 615-L. Consider units as a % (with 0.5 being saturated). Currently the sensors used in the field are not calibrated, so values may exceed 0.5. Soil type determines the actual value more than any amount of water in the ground. All soils give you different values. leaf wetness sensor - Campbell Scientific Leaf Wetness Sensor 237-L. Installation height is 24 inches above ground level. Simulates moisture droplets on mature cotton plants. 2.2 Station Locations Location Area Latitude Longitude Elevation ID --------------------------------------------------------------------------------------------------- 5NE Abernathy Abernathy/Hale County N33 52' 31.38" W101 45' 25.86" 3333 ft. ABER 1NE Amherst Amherst/Lamb County N34 01' 18.40" W102 24' 16.30" 3647 ft. AMHE 6S Anton Hockley County N33 43' 30.90" W102 11' 26.95" 3405 ft. ANTO 2S Brownfield Brownfield/Terry County N33 09' 06.78" W102 16' 15.66" 3314 ft. BROW 2NE Dimmitt Dimmitt/Castro County N34 34' 03.05" W102 17' 35.40" 3876 ft. DIMM 2NE Floydada Floydada/Floyd County N34 00' 05.70" W101 19' 33.18" 3179 ft. FLOY 3W Fluvanna Borden County N32 53' 56.50" W101 12' 06.80" 2707 ft. FLUV 2NE Friona Friona/Parmer County N34 39' 16.20" W102 41' 27.50" 4009 ft. FRIO 2 SE Gail Gail/Borden County N32 45' 18.30" W101 24' 51.80" 2552 ft. GAIL 3N Hart Hart/Castro County N34 25' 23.50" W102 06' 26.45" 3694 ft. HART 2SE Lamesa Lamesa/Dawson County N32 42' 21.30" W101 56' 10.20" 2956 ft. LAMS 4S Levelland Levelland/Hockley County N33 31' 35.40" W102 21' 36.00" 3496 ft. LEVE 5SW Graham Graham/Garza County N33 04' 53.50" W101 30' 58.10" 2851 ft. MACY 8SW Sundown Southeast Cochran County N33 23' 21.00" W102 36' 35.80" 3625 ft. MALL 1NE Morton Morton/Cochran County N33 44' 05.16" W102 44' 23.22" 3754 ft. MORT 2S Muleshoe Muleshoe/Bailey County N34 12' 22.86" W102 44' 32.64" 3806 ft. MULE 1N O'Donnell O'Donnell/Lynn County N32 59' 06.90" W101 49' 30.30" 3054 ft. ODON 6S of Olton Olton/Lamb County N34 05' 37.63" W102 07' 05.09" 3566 ft. OLTO 3N Plains Plains/Yoakum County N33 13' 41.30" W102 50' 21.70" 3711 ft. PLAI 1S Plainview Plainview/Hale County N34 10' 43.38" W101 42' 28.38" 3331 ft. PLVW 1S Post Post/Garza County N33 10' 18.40" W101 23' 07.60" 2618 ft. POST 1SE Ralls Ralls/Crosby County N33 40' 06.24" W101 22' 32.76" 3097 ft. RALL 12W Lubbock (Reese) Reese Center/Lubbock County N33 36' 27.00" W102 02' 56.52" 3347 ft. REES 3N Roaring Springs Roaring S./Motley County N33 56' 10.86" W100 50' 43.38" 2615 ft. ROAR 1SW Seagraves Seagraves/Gaines County N32 56' 11.20" W102 34' 27.90" 3360 ft. SEAG 2N Seminole Seminole/Gaines County N32 44' 26.70" W102 38' 08.90" 3313 ft. SEMI 7E Silverton Silverton/Briscoe County N34 26' 43.60" W101 11' 25.68" 3202 ft. SILV 2NE Slaton Slaton/Lubbock County N33 27' 24.84" W101 37' 02.04" 3065 ft. SLAT 3NE Tahoka Tahoka/Lynn County N33 12' 26.88" W101 46' 48.90" 3104 ft. TAHO 2NE Tulia Tulia/Swisher County N34 32' 34.60" W101 44' 25.80" 3478 ft. TULI 6 NW White River Lake White River Lake/Crosby County N33 31' 31.20" W101 09' 54.20" 2704 ft. WHIT 3.0 DATA COLLECTION AND PROCESSING UCAR/JOSS conducted no processing or quality control on these data. 4.0 DATA FORMAT AND FILE NAMING 4.1 Data Format These data are in comma-delimited ASCII format. 4.1.1 Station File Format For All Station EXCEPT Reese (REES) Two types of data are contained within the station data files (other than the Reese (REES) station which is described in Section 4.1.2. These data types are specified by the ARRAY ID within the file. ARRAY ID 1 is the meteorological and radiation data. ARRAY ID 2 is the soil data. 4.1.1.1 ARRAY ID 1 (Surface Met and Radiation) Data Format 1. Array ID: 1 (5-min observations) 2. Julian Day 3. Local Standard Time 4. Station ID (see Station Locations table in Section 2.2) 5. 10 m Wind Speed (scaler value in m/s) - 5-min average of 3-sec values. 6. 10 m Wind Speed (vector value in m/s) - 5-min average of 3-sec values. 7. 10 m Wind Direction (deg) - 5-min average of 3-sec values. 8. 10 m Wind Direction Standard Deviation 9. 10 m Wind Speed Standard Deviation 10. 10 m Peak Wind Speed (m/s) - peak 3-sec wind gust 11. 1.5 m Temperature (deg C) - 5-min average of 3-sec values. 12. 9 m Temperature (Heat Flux) (deg C) - 5-min average of 3-sec values. 13. 2 m Temperature (Heat Flux) (deg C) - 5-min average of 3-sec values. 14. 1.5 m Relative Humidity (%) - 5-min average of 3-sec values. 15. Station Pressure (mb) - Add 600 to get correct value in mb (hPa) - 5-min average of 12-sec values. 16. Rainfall (in) - Total in 5-min period. 17. Dewpoint (deg C) - Derived 18. 2 m Wind Speed (m/s) - 5-min average of 3-sec values. 19. Solar Radiation (W/m2) - 4.1.1.2 ARRAY ID 2 (Soil) Data Format 1. Array ID: 2 (15-min observations) 2. Julian Day 3. Local Standard Time 4. Station ID (see Station Locations table in Section 2.2) 5. Natural Soil Temperature at 5 cm depth (deg C) 6. Natural Soil Temperature at 10 cm depth (deg C) 7. Natural Soil Temperature at 20 cm depth (deg C) 8. Bare Soil Temperature at 5 cm depth (deg C) 9. Bare Soil Temperature at 20 cm depth (deg C) 10. Water Content Reflectometer at 5 cm depth (consider units as %) 11. Water Content Reflectometer at 20 cm depth (consider units as %) 12. Water Content Reflectometer at 60 cm depth (consider units as %) 13. Water Content Reflectometer at 75 cm depth (consider units as %) 14. Leaf Wetness (%) 15. Battery Voltage (V) - May vary from about 9 to 14 V). 16. Program Signature - Random number assigned during program changes. 4.1.2 Reese (REES) Station File Format Three types of data are contained within the Reese station data files, specified by different ARRAY IDs. ARRAY ID 1 is the meteorological data (winds, temperature, humidity, precipitation, etc), ARRAY ID 2 is the soil data, and ARRAY ID 3 is the radiation data. 4.1.2.1 ARRAY ID 1 (Surface Met) Data Format 1. Array ID: 1 (5-min observations) 2. Julian Day 3. Local Standard Time 4. Station ID (see Station Locations table in Section 2.2) 5. 10 m Wind Speed (scalar value in m/s) - 5-min average of 3-sec values. 6. 10 m Wind Speed (vector value in m/s) - 5-min average of 3-sec values. 7. 10 m Wind Direction (deg) - 5-min average of 3-sec values. 8. 10 m Wind Direction Standard Deviation 9. 10 m Wind Speed Standard Deviation 10. 10 m Peak Wind Speed (m/s) - 3-sec wind gust 11. 1.5 m Air Temperature (deg C) 12. 9 m Temperature (Heat Flux) (deg C) 13. 2 m Temperature (Heat Flux) (deg C) 14. 1.5 m Relative Humidity (%) 15. Station Pressure (mb) - Add 600 to get correct value 16. Rainfall (in) - total of 5-min observing period 17. Dewpoint (deg C) - 5-min average of 3-sec values. 18. 2 m Wind Speed (m/s) - 5-min average of 3-sec values. 4.1.2.2 ARRAY ID 2 (Soils) Data Format 1. Array ID: 2 (15-min observations) 2. Julian Day 3. Local Standard Time 4. Station ID (see Station Locations table in Section 2.2) 5. Natural Soil Temperature at 5 cm depth (deg C) 6. Natural Soil Temperature at 10 cm depth (deg C) 7. Natural Soil Temperature at 20 cm depth (deg C) 8. Bare Soil Temperature at 5 cm depth (deg C) 9. Bare Soil Temperature at 20 cm depth (deg C) 10. Water Content Reflectometer at 5 cm depth (consider units as %) 11. Water Content Reflectometer at 20 cm depth (consider units as %) 12. Water Content Reflectometer at 60 cm depth (consider units as %) 13. Water Content Reflectometer at 75 cm depth (consider units as %) 14. Leaf Wetness (%) 15. Battery Voltage (V) 16. Program Signature 4.1.2.3 ARRAY ID 3 (Radiation) Data Format 1. Array ID: 3 (5-min observations) 2. Julian Day 3. Local Standard Time 4. Station ID (see Station Locations table in Section 2.2) 5. NRLite Radiometer (W/m2) - Kipp and Zonen NRLite Radiometer measures incoming and outgoing radiation. Values will be negative at night and positive during the day unless cloudy. 6. SPLite Radiometer (W/m2) - Kipp and Zonen SP-Lite Pyranometer measures incoming radiation (accumulated W/m2 from 0 to whatever). 7. Licor Pyranometer (W/m2) - Licor Silicon Pyranometer same measurement as SP-Lite pyranometer. 8. CM21 Pyranometer (W/m2) - Kipp and Zonen CM21 Pyranometer is the main pyranometer for mesonet calibration. Measures accumulated W/m2. 9. CM3 Pyranometer (W/m2) - Kipp and Zonen CM3 Pyranometer same measurment as SP-Lite Pyranometer. 10. Experimental Rain Gauge (in) - Not always present in the data. Varies from time to time as we test out different rain gauges for vendors. 4.2 File Naming conventions SILV0206.txt where: SILV is the station ID (see Station Location table in section 2.2) 02 is the year (2002) 06 is the month (June) 5.0 DATA REMARKS None. 6.0 REFERNCES West Texas Mesonet home page: http://www.mesonet.ttu.edu/