PLEASE NOTE: The file format described below refers to the Met Office Land Surface data (1900-2000) dataset which has been superseded by the Met Office MIDAS dataset (1853-present) at the BADC.
A list of UK stations for which the BADC holds .radt files is available (.radt stations).
The file name convention is (STATION_NAME)(YEAR).(MESSAGE_TYPE).(FILE_EXTENSION)
These .radt files contain radiation amounts currently being
In all cases, the file headers END_HOUR and COUNT define the observation period. Values are either for an hour or for 24 hours.
Approximately 103 UK stations report radiation, but almost all only report hourly global solar radiation and hourly diffuse solar radiation. Only three stations report direct irradiation.
24 hour values are usually for 0000-2359 on the stated day.
Occasionally the period may be 09-09Z. An 09-09 period ends at
0900 on the stated day. There should only be one 24 hour report
per station per day.
-999 indicates a missing value.
The first line of the data file are the fields headers (which are detailed in the table below).
The fields in the .radt data files are :
|ID||Station Ref. Number||1||1-8||-||-|
|MET_DOM||Meteorological Domain||3||18-28||-||Message types|
|MON||Month||4||36-43||-||1 or 2 characters (from 1 to 12)|
|DAY||Day||5||44-51||-||1 or 2 characters (from 1 to 31max)|
|END_HOUR||Hour||6||52-61||-||Hour of observation from 0 to 2300|
|COUNT||Hour count||7||62-69||-||See COUNT definition|
|GLOBAL||Global Solar irradiation amount||8||70-77||W.hour/sq.m||'Global' radiation is that received from both the sun and the surrounding environment.|
|DIFFUSE||Diffuse Solar irradiation amount||9||78-86||W.hour/sq.m||'Diffuse' radiation is that obtained when a shade ring is used to block out the sun's direct radiation.|
|DIRECT||Direct Solar irradiation amount||10||87-94||W.hour/sq.m||Global radiation is the amount of Direct and diffuse radiation which reaches the Earth's surface at a given location.|