This 30-Minute CEOP Meteorological Tower Dataset contains the
meteorological tower parameters reported by each
CSE/Reference Site/Station Identifier combination
for each height at each date/time.
The CEOP Meteorological Tower data set shall be formed only if more than one observation
height is included. If there is only one height of meteorological data it should be included in the
CEOP Surface Meteorologogy and Radiation Data Set.
The CEOP Meteorological Tower dataset
format contains 9 metadata parameters and 18 data parameters and flags.
The metadata parameters describe the station location and time at which the
data were collected.
The time of observation is reported both in Coordinated
Universal Time (UTC) nominal and UTC actual time. The UTC actual time is the time
of the actual observation. The minutes portion of the UTC nominal time is
always 00 or 30. If the UTC actual time minutes are less than 15 or
greater than or equal to 45, then the UTC nominal time minutes would be 00,
else the UTC nominal minutes would be 30.
The time of observation should be from 00:00 to 23:30 UTC. No times
of 24:00 UTC should be reported.
Equations are provided in the Notes sections for each derived parameter.
All parameters and flags are space seperated giving 205
characters in each line (not including the final return character
ending each line). Completely missing records should be included.
The final CEOP Meteorological Tower output file(s)
should follow the CEOP Reference Site Data Set File Naming Conventions,
and data records should be sorted by UTC Nominal and Actual
Date/Time and then by Latitude/Longitude.
The table below details the space separated data parameters and
associated flags in each record.
Continuous meteorological parameters will be averaged over the 30-minutes
prior to the reported observation.
The flag values are assigned by the Reference Site,
according to the CEOP-specified data flags.
The following is a sample record of the CEOP Meteorological Tower Data. Unlike this example, there are no carriage returns in the data. Thirty minutes worth of data are presented in each record. See the table below for an exact format specification.
2001/07/01 01:00 2001/07/01 01:00 LBA Pantanal Pantanal -19.56339 -57.01494 -999.99 0.00 1003.30 U 25.62 U 16.54 U 57.22 U 11.75 U 2.98 U 38.82 U -1.87 U -2.32 U
Parameter | C Format | Missing Value | Final Units/Equations/Notes |
---|---|---|---|
UTC Nominal Date/Time | 16 chars | N/A | yyyy/mm/dd HH:MM, where MM is 00 or 30, only |
UTC Actual Date/Time | 16 chars | N/A | yyyy/mm/dd HH:MM |
CSE Identifier | 10 chars | N/A | Fill name with underscores, not spaces. |
Reference Site Identifier | 15 chars | N/A | Fill name with underscores, not spaces. |
Station Identifier | 15 chars | N/A | Fill name with underscores, not spaces. |
Latitude | f10.5 | -99.99999 | decimal degrees. South is negative. |
Longitude | f11.5 | -999.99999 | decimal degrees. West is negative. |
Elevation | f7.2 | -999.99 | meters |
Sensor Height | f7.2 | -999.99 | meters; Height of sensor. Positive above ground level. Negative below ground. |
Station Pressure | f7.2 | -999.99 | hPa (mb). This is the pressure at the reported sensor height |
Station Pressure Flag | 1 char | M | See Flag values. |
Air Temperature | f7.2 | -999.99 | Celsius |
Air Temperature Flag | 1 char | M | See Flag values. |
Dew Point Temperature | f7.2 | -999.99 | Celsius. Equations. |
Dew Point Temperature Flag | 1 char | M | See Flag values. |
Relative Humidity | f7.2 | -999.99 | Percent. Equations. |
Relative Humidity Flag | 1 char | M | See Flag values. |
Specific Humidity | f7.2 | -999.99 | g/kg; Note g/kg = (kg/kg)*1000.0. Equations. |
Specific Humidity Flag | 1 char | M | See Flag values. |
Wind Speed | f7.2 | -999.99 | m/s. Equations. |
Wind Speed Flag | 1 char | M | See Flag values. |
Wind Direction | f7.2 | -999.99 | degrees. Equations. |
Wind Direction Flag | 1 char | M | See Flag values. |
U Wind Component | f7.2 | -999.99 | m/s. Equations. |
U Wind Component Flag | 1 char | M | See Flag values. |
V Wind Component | f7.2 | -999.99 | m/s. Equations. |
V Wind Component Flag | 1 char | M | See Flag values. |