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About the data:
Archived data from the Illinois Climate Network are structured into a comma-delimited format for ease of importation into most spreadsheet applications. Beginning dates vary. Data column headers are defined below.
Average data are calculated from the polling of instrumentation every 10 seconds and averaging over each hour and day. Maximum and minimum data are the single highest and lowest values recorded for the day within each variable. Solar radiation, precipitation, and evaporation represent a daily total of these parameters.
Headers ending with "er" are error flags with the options of "M" for missing data and "E" for estimated data. Where appropriate, missing data were estimated from adjacent station data or interpolated from adjacent times at the same site.
Column Headers:
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year = year
month = month
day = day
max_wind_gust = maximum daily wind gust (miles per hour)
xwser = error flag for maximum daily wind gust
avg_wind_speed = average daily wind speed(miles per hour)
awser = error flag for average daily wind speed
avg_wind_dir = average daily wind direction (degrees, clockwise from north)
awder = error flag for average daily wind direction
sol_rad = total daily solar radiation (mega-Joules per square meter)
soler = error flag for total daily solar radiation
max_air_temp = daily maximum air temperature (degrees Fahrenheit)
xater = error flag for daily maximum air temperature
min_air_temp = daily minimum air temperature (degrees Fahrenheit)
nater = error flag for daily minimum air temperature
avg_air_temp = average daily air temperature (degrees Fahrenheit)
aater = error flag for average daily air temperature
max_rel_hum = daily maximum relative humidity (percent)
xrher = error flag for daily maximum relative humidity
min_rel_hum = daily minimum relative humidity (percent)
nrher = error flag for daily minimum relative humidity
avg_rel_hum = average daily relative humidity (percent)
arher = error flag for average daily relative humidity
avg_dewpt_temp = average daily dew point temperature (degrees Fahrenheit)
adper = error flag for average daily dew point temperature
precip = total daily precipitation (inches)
pcer = error flag for total daily precipitation
pot_evapot = total potential evapotranspiration (inches)
pevaper = error flag for total potential evapotranspiration
max_soiltemp_4in = daily maximum 4-inch soil temperature (degrees Fahrenheit)
xst4er = error flag for daily maximum 4-inch soil temperature
min_soiltemp_4in = daily minimum 4-inch soil temperature (degrees Fahrenheit)
nst4er = error flag for daily minimum 4-inch soil temperature
avg_soiltemp_4in = average daily 4-inch soil temperature (degrees Fahrenheit)
ast4er = error flag for error flag for average daily 4-inch soil temperature
max_soiltemp_8in = daily maximum 8-inch soil temperature (degrees Fahrenheit)
xst8er = error flag for error flag for daily maximum 8-inch soil temperature
min_soiltemp_8in = daily minimum 8-inch soil temperature (degrees Fahrenheit)
nst8er = error flag for daily minimum 8-inch soil temperature
avg_soiltemp_8in = average daily 8-inch soil temperature (degrees Fahrenheit)
ast8er = error flag for error flag for average daily 8-inch soil temperature
site = station name
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