TITLE: NWS (GTS mandatory/significant levels) Rawinsonde Data [NCAR/EOL] CONTACTS: Steve Williams NCAR/EOL P.O. Box 3000 Boulder, CO 80307-3000 phone: 303-497-8164 email: firstname.lastname@example.org 1.0 DATA SET OVERVIEW This data set contains the mandatory and significant level radiosonde data from the radiosonde stations in the T-REX region. These data were grabbed from the NOAA ESRL/GSD Radiosonde data archive for the T-REX period (March and April 2006). Each file contains one month of data for all stations. The data are in columnar ASCII. 2.0 INSTRUMENT DESCRIPTION 2.1 Instrumentation information No information at this time. 2.2 Station Locations The station locations are from the data files. NAME: SAN NICOLAS IS., CA ID: NSI WBAN: 93116 WMO: 72291 LATITUDE: 33.25 LONGITUDE: -119.45 ELEVATION: 14 m Number of soundings: 20 NAME: San Diego, CA ID: NKX WBAN: 03190 WMO: 72293 LATITUDE: 32.87 LONGITUDE: -117.15 ELEVATION: 134 m Number of soundings: 122 NAME: EDWARDS AFB, CA ID: EDW WBAN: 03197 WMO: 72381 LATITUDE: 34.90 LONGITUDE: -117.92 ELEVATION: 724 m Number of soundings: 89 NAME: Desert Rock, NV ID: DRA WBAN: 03160 WMO: 72387 LATITUDE: 36.62 LONGITUDE: -116.02 ELEVATION: 1007 m Number of soundings: 81 NAME: PT. MUGU, CA ID: NTD WBAN: 93111 WMO: 72391 LATITUDE: 34.10 LONGITUDE: -119.12 ELEVATION: 2 m Number of soundings: 12 NAME: VANDENBERG AFB, CA ID: VBG WBAN: 93214 WMO: 72393 LATITUDE: 34.75 LONGITUDE: -120.57 ELEVATION: 100 m Number of soundings: 124 NAME: Reno, NV ID: REV WBAN: 03198 WMO: 72489 LATITUDE: 39.57 LONGITUDE: -119.80 ELEVATION: 1516 m Number of soundings: 122 NAME: Oakland, CA ID: OAK WBAN: 23230 WMO: 72493 LATITUDE: 37.75 LONGITUDE: -122.22 ELEVATION: 6 m Number of soundings: 130 NAME: Elko, NV ID: LKN WBAN: 04105 WMO: 72582 LATITUDE: 40.87 LONGITUDE: -115.73 ELEVATION: 1608 m Number of soundings: 121 NAME: TWENTYNINE PALMS NAAS, CA ID: 999 WBAN: 93121 WMO: 99999 LATITUDE: 34.22 LONGITUDE: -116.05 ELEVATION: 610 m Number of soundings: 3 3.0 DATA COLLECTION AND PROCESSING NCAR/EOL conducted no processing or quality control on these data. 4.0 DATA FORMAT AND FILE NAMING 4.1 File Naming conventions Files have names like: march.txt april.txt 4.2 Data Format These data are columnar ASCII. FSL Rawinsonde data format The official FSL data format is similar to the format used by the National Severe Storms Forecast Center (NSSFC) in Kansas City. The first 4 lines of the sounding are identification and information lines. All additional lines are data lines. An entry of 32767 (original format) or 99999 (new format) indicates that the information is either missing, not reported, or not applicable. ---COLUMN NUMBER--- 1 2 3 4 5 6 7 LINTYP header lines 254 HOUR DAY MONTH YEAR (blank) (blank) 1 WBAN# WMO# LAT D LON D ELEV RTIME 2 HYDRO MXWD TROPL LINES TINDEX SOURCE 3 (blank) STAID (blank) (blank) SONDE WSUNITS data lines 9 PRESSURE HEIGHT TEMP DEWPT WIND DIR WIND SPD 4 5 6 7 8 LEGEND LINTYP: type of identification line 254 = indicates a new sounding in the output file 1 = station identification line 2 = sounding checks line 3 = station identifier and other indicators line 4 = mandatory level 5 = significant level 6 = wind level (PPBB) (GTS or merged data) 7 = tropopause level (GTS or merged data) 8 = maximum wind level (GTS or merged data) 9 = surface level HOUR: time of report in UTC LAT: latitude in degrees and hundredths LON: longitude in degrees and hundredths D: direction latitude ('N' or 'S') or longitude ('E' or 'W') -note this only appears in the online archive containing international observations. ELEV: elevation from station history in meters RTIME: is the actual release time of radiosonde from TTBB. Appears in GTS data only. HYDRO: the pressure of the level to where the sounding passes the hydrostatic check (see section 4.3).** MXWD: the pressure of the level having the maximum wind in the sounding. If within the body of the sounding there is no "8" level then MXWN is estimated (see section 3.2). TROPL: the pressure of the level containing the tropopause. If within the body of the sounding there is no "7" level, then TROPL is estimated (see section 3.3)** LINES: number of levels in the sounding, including the 4 identification lines. TINDEX: indicator for estimated tropopause. A "7" indicates that sufficient data was available to attempt the estimation; 11 indicates that data terminated and that tropopause is a "suspected" tropopause. SOURCE: 0 = National Climatic Data Center (NCDC) 1 = Atmospheric Environment Service (AES), Canada 2 = National Severe Storms Forecast Center (NSSFC) 3 = GTS or FSL GTS data only 4 = merge of NCDC and GTS data (sources 2,3 merged into sources 0,1) SONDE: type of radiosonde code from TTBB. Only reported with GTS data 10 = VIZ "A" type radiosonde 11 = VIZ "B" type radiosonde 12 = Space data corp.(SDC) radiosonde. WSUNITS:wind speed units (selected upon output) ms = tenths of meters per second kt = knots PRESSURE: in whole millibars (original format) in tenths of millibars (new format) HEIGHT: height in meters (m) TEMP: temperature in tenths of degrees Celsius DEWPT: dew point temperature in tenths of a degree Celsius WIND DIR: wind direction in degrees WIND SPD: wind speed in either knots or tenths of a meter per second (selected by user upon output) An example of fortran format statements necessary to read output rawinsonde data, according to LINTYP, is as follows: LINTYP 254 (3i7,6x,a4,i7) 1 (3i7,f7.2,a1,f6.2,a1,i6,i7) 2 (7i7) 3 (i7,10x,a4,14x,i7,5x,a2) 4,5,6,7,8,9 (7i7) Note the format descriptor for LINTYP=1 has changed to conform with the CDROM archive. **- section of noaa tech memo on the data base (in print) TECHNICAL INFORMATION: Schwartz, B.E., and M. Govett, 1992: "A hydrostatically consistent North American Radiosonde Data Base at the forecast Systems Laboratory, 1946-present." NOAA Technical Memorandum ERL FSL-4. Available from NOAA/ERL/FSL 325 Broadway, Boulder, CO 80303. 5.0 DATA REMARKS None.