**HAPEX SAHEL Information System**

*A joint project between CESBIO, ORSTOM and CNES*

**Comment:**- This Table contains temperature and heat flux data measured and derived by sigma method. Reading University.

**Principal investigator:**- George DUGDALE

**The fields of the table are:**: The name of the grid where the data was taken.**GRID_ID**: The number of the station in the grid cell.**GRID_ORDER**: This column contains the date on which measurement was made.**OBS_DATE**: This column contains the end of 10mn period averaging. (HHMI GMT).**OBS_TIME**: This column contains the identifier of the group of masts from which the measurement was made. when 1-->masts 1 and 2.When 2-->masts3 and 4.**MAST_GROUP**: This column contains the wind speed (m/s) from mast 1 if mast_group=1 and mast 3 if mast_group=2.**U1**: This column contains the wind speed as U1.**U2**: This column contains the temperature measured from mast 1 when mast_group=1 and from mast 3 when mast_group=2.**T1**: This column contains the temperature as T1.**T2**: This column contains the temperature as T1.**T3**: This column contains the temperature measured from mast 2 when mast_group=1 and from mast 4 when mast_group=2.**T4**: This column contains temperature as T4.**T5**: This column contains the standard deviation of T1.**ST1**: This column contains the standard deviation of T2.**ST2**: This column contains the standard deviation of T3;**ST3**: This column contains the standard deviation of T4.**ST4**: This column contains the standard deviation of T5.**ST5**: This column contains the net radiation.**RAD**: This column contains the sir density derived from T5.**RHO**: This column contains the sensible heat flux.**H1**: This column contains the sensible heat flux.**H2**: This column contains the sensible heat flux.**H3**: This column contains the sensible heat flux.**H4**: This column contains the sensible heat flux.**H5**: This column contains the Monin_Obukhov length.**L1**: This column contains the Monin-Obukhov length.**L2**: This column contains the Monin-Obukhov length.**L3**: This column contains the Monin-Obukhov length.**L4**: This column contains the Monin-Obukhov length.**L5**: This column contains the certification level for the data : T)est,C)hecked by PI, U)nchecked by PI.**CERT_LEVEL**: This column contains the revision date for the data in the format DD-MMM-YY.**REV_DATE**

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