netcdf sgpallruc60X1.c0.980423.210000 {
dimensions:
	time = UNLIMITED ; // (1 currently)
	x = 81 ;
	y = 62 ;
	pres = 37 ;
variables:
	int base_time ;
		base_time:string = "23-Apr-98,21:00:00 GMT" ;
		base_time:long_name = "Base time in Epoch" ;
		base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ;
	double time_offset(time) ;
		time_offset:long_name = "Time offset from base_time" ;
		time_offset:units = "seconds since 1998-04-23 21:00:00 0:00" ;
	double valid_time(time) ;
		valid_time:long_name = "valid time" ;
		valid_time:units = "hours since 1998-04-23 00:00:00 00" ;
		valid_time:calc = "both valid_time (as an offset in hours from valid_date) and time_offset (as an offset in seconds from base_time were taken from the time of the raw data file name, after the latter has been checked against the time stamp of all GRIB records in it." ;
		valid_time:valid_max = "24.f" ;
		valid_time:valid_min = "0.f" ;
	double forecast_period(time) ;
		forecast_period:long_name = "forecast period" ;
		forecast_period:units = "hours" ;
		forecast_period:description = "time period from model initiation (with analysis data) to valid time" ;
		forecast_period:value_0_explained = "Record is a zero hour forecast." ;
		forecast_period:value_\>0_explained = "Record is a bona fide forecast." ;
		forecast_period:value_-7777_explained = "Record is an analysis record (not a forecast)" ;
	float valid_date ;
		valid_date:long_name = "date of valid_time" ;
		valid_date:units = "day.time_zone [See format and note_2.]" ;
		valid_date:note_1 = "duplicates the reference date in \'units\' of valid_time" ;
		valid_date:purpose = "This field is created, so that this date can appear in data listing with valid_time and forecast_period.  A reader friendly feature, at the expense of redundancy." ;
		valid_date:format = "yyyymmdd.zz in floating point (real) format; this non-standard foramt was chosen so that programmers will have only one standard way of accessing this reference date (by reading the reference date in the \'units\' attribute of valid_time." ;
		valid_date:note_2 = "If zz does not appear in ncdump listing, it means its value is equal to 00 and thus truncated." ;
	float avail_of_run(time) ;
		avail_of_run:long_name = "availability of model run (i.e., file containing run output)" ;
		avail_of_run:units = "(none)" ;
		avail_of_run:values = "1. (available); 0. (not available to ingest module);" ;
		avail_of_run:purpose = "This field is intended to be passed on to the platform sgpeta90X1.c1, where it is used to indicate when model run output is not available." ;
	float pres(pres) ;
		pres:long_name = "pressure at constant pressure surface" ;
		pres:units = "hPa" ;
		pres:valid_max = "1000.01f" ;
		pres:valid_min = "99.99f" ;
	float lat_PS(y, x) ;
		lat_PS:long_name = "latitude of the polar stereographic grid points" ;
		lat_PS:units = "degrees North" ;
		lat_PS:mapping = "latPS increases mainly with index y, while it also varies slightly with x" ;
		lat_PS:note = "That is because the grid is polar stereographic" ;
		lat_PS:valid_max = "91.01f" ;
		lat_PS:valid_min = "-90.01f" ;
	float lon_PS(y, x) ;
		lon_PS:long_name = "longitude of the polar stereographic grid points" ;
		lon_PS:units = "degrees East" ;
		lon_PS:mapping = "lonPS increases mainly with index x, while it also varies slightly with y" ;
		lon_PS:note = "That is because the grid is polar stereographic" ;
		lon_PS:valid_max = "360.01f" ;
		lon_PS:valid_min = "-360.01f" ;
	float lat ;
		lat:long_name = "north latitude" ;
		lat:units = "degrees" ;
		lat:valid_range = -90.f, 90.f ;
	float lon ;
		lon:long_name = "east longitude" ;
		lon:units = "degrees" ;
		lon:valid_range = -180.f, 180.f ;
	float alt ;
		alt:long_name = "altitude" ;
		alt:units = "meters above Mean Sea Level" ;

// global attributes:
		:Date = "Sun Apr 26 04:33:40 1998" ;
		:Version = "Exp" ;
		:Command_Line = "/apps/vip/bin/allruc60 -i sgpallruc60X1.00.980423.210000.raw" ;
		:Input_Platforms = "none; ingest from external file" ;
		:BW_Version = "Release_3_2" ;
		:title = "\"Rapid Update Cycle\" ;" ;
		:type = "\"Isobaric variables on isobaric surfaces\" ;" ;
		:history = "created by Zeb DataStore, 26-Apr-98,4:33:40, $RCSfile: DFA_NetCDF.c,v $ $Revision: 3.47 $\n",
			"" ;
		:inclusion = "\"analysis data only; 0,1,2 hr. forecast were excluded\" ;" ;
		:scale = "\"60km at 40N\" ;" ;
		:Temporal_Reporting_Interval = "\"3 hours\" ;" ;
		:latlon_SW_corner = "\"22.837, -120.491\" ;" ;
		:latlon_SE_corner = "\"20.090,  -81.244\" ;" ;
		:latlon_NW_corner = "\"52.463, -136.455\" ;" ;
		:latlon_NE_corner = "\"45.989,  -60.829\" ;" ;
		:Data_Volume_per_reporting_interval = "\"4 megabytes\" ;" ;
		:record = "valid_time, forecast_period" ;
		:record_explained = "the output of one model run which is stored as a time dependent sample" ;
		:record_stored = "This file contains one record, i.e., RUC model output, from only one of the following eight daily runs now ingested into allruc60 platforms:" ;
		:analysis/forecast_period = "an, an, an, an, an,  an,  an,  an" ;
		:time_of_day = "0z, 3z, 6z, 9z, 12z, 15z, 18z, 21z (time of day at valid_time)" ;
		:source = "NMC (National Meteorological Center)" ;
		:source_format = "GRIB" ;
		:grid_type = "N. Hemisphere polar stereographic (GRIB grid #87)" ;
		:index_x = "ranges from 1 (west)   to Nx (east), fastest moving" ;
		:index_y = "ranges from 1 (south)  to Ny (north), second fastest" ;
		:index_pres = "ranges from 1 (1000mb) to 37 (100mb)" ;
		:index_time = "slowest moving; only 1 record per file in this platform" ;
		:missing-data = "-9999.0f" ;
		:no-value-expected = "-7777.0f" ;
		:zeb_platform = "sgpallruc60X1.c0" ;
}