The file format is ascii, comma delimited. The fields are as follows: site_code - the site identifier (ypg_s1, etc); also used in the filename date/time - GMT date and time of observation latitude - site latitude (degrees/360) longitude - site longitude (degrees/360) elevation - site elevation (meters) pres - station pressure (hectopascals) tmpc - temperature (degrees celsius) sped - average wind speed (meters/second) gums - peak wind speed (meters/second) drct - wind direction (degrees/360) wstd - wind direction standard deviation (degrees/360) srad - solar radiation (watts/meter2) p15m - total precipitation/prev 15 mins (millimeters) p24m - total precipitation/prev 24 hours (millimeters) dwpc - dew point (degrees celsius) rh - relative humidity (percent) Unknown values are set to '-9999' Data are available from the following four stations, each with multiple sites: Dugway Proving Ground, Utah (DPG) Ft. Huachuca Proving Ground, Arizona (EPG) White Sands Missle Range, New Mexico (WSMR) Yuma Proving Ground, Arizona (YPG)