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. |