TITLE: Mesonet Texas Evapotranspiration Network Data [JOSS] CONTACTS: For more information on the Texas ET Network contact: Shay Simpson Extension Associate - Landscape Irrigation Department of Agricultural Engineering 2117 TAMU College Station, TX 77843-2117 (979)845-5614 shay-simpson@tamu.edu Dr. Guy Fipps Professor & Extension Specialist - Irrigation Department of Agricultural Engineering Texas A&M University College Station, TX 77843-2117 (979)845-3977 g-fipps@tamu.edu 1.0 DATA SET OVERVIEW This data set contains hourly resolution surface meteorological data from the Texas Evapotranspiration (ET) Network. This network includes 24 stations around the state of Texas. This data set covers the period from 1 January to 17 July 2002. The data are in comma- delimited ASCII format. 2.0 INSTRUMENT DESCRIPTION 2.1 Instrumentation The stations are of varying type but must meet or beat the following specifications: Temperature/RH - HMP45C or equivalent combination temperature and relative humidity sensor enclosed in a white radiation shield. Relative humidity range: 0 - 100% RH, +/-2% RH, operating stability +/-3% RH/year. Temperature range: +14 - 122F. Soil Temperature Range - +15 to 120F, accuracy +/-0.5F with 10 foot cable. Solar Radiation - LI200X or equivalent silicon pyranometer with FIXED MULTIPLIER (11 foot lead). Accuracy: +/-3% typical, +/-5% minimum. Wind Speed - 3-cup anemometer, 1 count/revolution, AC, operating temperature range: -50 to +120F, operational wind speed: 0 to 100 mph, gust survival: 130 mph, threshold: 1.5 mph, accuracy: +/-1.1 mph @ 0 - 45 mph and 2.2 mph @ 45 - 100 mph. Wind Direction - Operating temperature range: -50 to +120F, accuracy +/-5F. Rain Gage - 6" or greater orifice size, sensitivity: 1 tip per 0.01 inch. 2.2 Station Locations Station Longitude Latitude Elev (m) ------------------------------------------------------------ No information yet. 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. The parameter order is the same for all sites, but the units vary. stationid, julian_date, hour, temp, rh, radation, wind, rain Austin F MJm2 mph in Calhoun F kJm2 mph in Coyanosa F MJm2 mph in Georgetown F MJm2 mph in Harlingen F MJm2 mph in Seymour Aquifer F Wm2 mph in Hondo F MJm2 mph in Houston C MJm2 mph in Irving C calcm2 milesday in Jackson F kJm2 mph in Kleberg F kJm2 kmhr in Knippa F MJm2 mph in San Angelo F MJm2 mph in Stephenville F MJm2 mph in San Antonio F MJm2 mph in Sinton F kJm2 mph in Sweetwater F MJm2 mph in TAMU Golf Course F MJm2 mph in Victoria F kJm2 mph in Weslaco F MJm2 mph in La Pryor F MJm2 mph in Uvalde Center F kJm2 mph in Weslaco #2 F MJm2 mph in San Juan F MJm2 mph in 4.2 File Naming conventions aust.dat where: aust is the station ID (here ?). 5.0 DATA REMARKS None. 6.0 REFERNCES None.