=============================================== Format for the ARS micronet 5-minute data files Version: a5m001 Date: 1998-03-01 =============================================== This file describes the 5-minute ARS micronet data files. Each data file contains a line each for the version reference string, the 4-letter station ID, the date and a blank line. These are followed by a data-header line and finally the data. version ------- This gives the version reference string for the file's data format and units. If either format or units are revised then the version will also be changed. (At the top of this document is the version for the specific file type that this document describes.) station ------- The 4-character station ID of the file. date ---- The year, month and day separated by "-". The date is followed by a blank line. header ------ The header line gives the organization for the data records. The header line contains the following: STID - station ID (same as above) TIME - CST time (hours and minutes separated by a space) RAIN - accumulated rainfall (mm) RELH - relative humidity (%) TAIR - air temperature at 1.5 m (deg-C) SRAD - solar radiation (W/m^2) TS05 - soil temperature at 05 cm depth (deg-C) TS10 - soil temperature at 10 cm depth (deg-C) TS15 - soil temperature at 15 cm depth (deg-C) TS30 - soil temperature at 30 cm depth (deg-C) BATV - battery voltage (volts) FLSV - flag status value Most parameters are followed by a column of data with "Q" in the header. This indicates a column for the quality check (QC) character. Data ---- Each line of data contains values associated with the header representation. For most parameters there is an associated QC character which represents the following: g - good (passed QC tests - extremely low probability of error) S - suspect (QC tests indicate some suspicion - low probability of error) W - warning (several QC test failures - high probability of error) F - failure (known error) M - missing (data not received) I - ignore N - not installed U - unknown The values for the parameters RAIN, RELH, TAIR, SRAD, and FLSV are valid for the 5-minute period ending at the specified time. All other parameters are valid for the 15-minute period ending at the specified time. The 15-minute parameter values are included only every third record. For the other two times the values are set to -999.0 with QC character of "I". Note on FLSV ------------ A non-zero value for FLSV indicates that a technician was servicing the site. All data should be checked thoroughly to the users satisfaction before using. Sample Format ------------- For reading the data line in FORTRAN 77 the following format statement may be used: format (x, a4, 2x, i2, x, i2, f8.2, x, a1, 7(f7.1, x, a1), f7.1, i7) File Naming Convention ------------- Files are named similar to the following: MMDDxxxx.YYY Where MM = month DD = day XXXX = site ID YYY = last 3 digits of year Disclaimer ---------- The ARS Micronet data of the Little Washita River Watershed are accepted and used by the recipient upon the express understanding that the ARS and it's employees make no warranties, expressed or implied, concerning the accuracy, completeness, reliability or suitability for any one purpose, and that ARS and it's employees shall be under no liability to any person by reason of any use made thereof. The ARS requests that the recipient of the ARS Micronet data does not distribute, publish or disseminate the data under the recipient's name without full and up-front acknowledgement of the ARS as the source of the data, and that the recipient acknowledges the support and role of the ARS in publications that use and are based on the ARS data. The data can be requested from the ARS Micronet Data manager at USDS-ARS, 7207 W. Cheyenne St., El Reno, OK 73036.