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Format of the CWEC files

 

CWEC files use the WYEC2 format which is briefly summarized in the the table below. Note that some newer files may be in Year2000 compliant format, i.e. with 4 characters for the year instead of 2. All fields to the right of the year are therefore moved two characters to the right.

Field   Data       Flags      Data element and description
Number  Positions  Positions

001     001-005    --         WBAN station identification number
002     006-006    --         File source code
003     007-014    --         Time, Yr Mo Day Hr (2 chars each)
101     015-018    --         Extraterrestrial irradiance, kJ/m2
102     019-022    023-024    Global horizontal irradiance, kJ/m2
103     025-028    029-030    Direct normal irradiance, kJ/m2
104     031-034    035-036    Diffuse horizontal irradiance, kJ/m2
105     037-040    041        Global horizontal illuminance, 100 lux
106     042-045    046        Direct normal illuminance, 100 lux
107     047-050    051        Diffuse horizontal illuminance, 100 lux
108     052-055    056        Zenith luminance, 100 Cd/m2
110     057-058    059        Minutes of sunshine, 0-60 minutes
201     060-063    064        Ceiling height, 10 m
202     065-068    069        Sky condition
203     070-073    074        Visibility, 100 m
204a    075        --         Occurrence of thunderstorm, tornado or squall.
204b    076        --         Occurrence of rain, rain showers or freezing
                              rain
204c    077        --         Occurrence of drizzle, freezing drizzle
204d    078        --         Occurrence of snow, snow pellets or ice crystals
204e    079        --         Occurrence of snow showers or snow grains
204f    080        --         Occurrence of sleet (ice pellets), sleet showers
                              or hail
204g    081        --         Occurrence of fog, blowing dust or blowing sand
204h    082        --         Occurrence of smoke, haze, dust, blowing snow	or blowing spray
204i    --         083        Weather Flag
205     084-088    089        Station pressure, 10 Pa
206     090-093    094        Dry bulb temperature, 0.1 C
207     095-098    099        Dew point temperature, 0.1 C
208     100-102    103        Wind direction, 0-359 degrees
209     104-107    108        Wind speed, 0.1 m/s
210     109-110    111        Total sky cover, 0-10 in tenths
211     112-113    114        Opaque sky cover, 0-10 in tenths
212     115        116        Snow cover (0/1)

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