This 30-Minute CEOP dataset contains the surface meteorological and radiation parameters reported by each CSE/Reference Site/Station Identifier combination at each Date/Time. The CEOP Surface Meteorological and Radiation Dataset format contains 8 metadata parameters and 38 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 separated giving 305 characters in each line (not including the final return character ending each line). Completely missing records should be included. The final CEOP Surface Meteorological and Radiation Dataset 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 and 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 Surface Meteorological and Radiation 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 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 0.00 U -999.99 M -2.40 U
-1.26 U -999.99 M -999.99 M -27.10 U -999.99 M -0.52 U -3.22 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 |
| Station Pressure | f7.2 | -999.99 | hPa (mb). |
| 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. See Equations |
| Dew Point Temperature Flag | 1 char | M | See Flag values. |
| Relative Humidity | f7.2 | -999.99 | percent. See Equations |
| Relative Humidity Flag | 1 char | M | See Flag values. |
| Specific Humidity | f7.2 | -999.99 | g/kg. See Equations |
| Specific Humidity Flag | 1 char | M | See Flag values. |
| Wind Speed | f7.2 | -999.99 | m/s. See Equations |
| Wind Speed Flag | 1 char | M | See Flag values. |
| Wind Direction | f7.2 | -999.99 | degrees. See Equations |
| Wind Direction Flag | 1 char | M | See Flag values. |
| U Wind Component | f7.2 | -999.99 | m/s. See Equations |
| U Wind Component Flag | 1 char | M | See Flag values. |
| V Wind Component | f7.2 | -999.99 | m/s. See Equations |
| V Wind Component Flag | 1 char | M | See Flag values. |
| Precipitation | f7.2 | -999.99 | millimeters. Incremental precipitation over the previous 30 minutes. |
| Precipitation Flag | 1 char | M | See Flag values. |
| Snow Depth | f7.2 | -999.99 | centimeters. |
| Snow Depth Flag | 1 char | M | See Flag values. |
| Incoming Shortwave | f8.2 | -999.99 | W/m2. |
| Incoming Shortwave Flag | 1 char | M | See Flag values. |
| Outgoing Shortwave | f8.2 | -999.99 | W/m2 |
| Outgoing Shortwave Flag | 1 char | M | See Flag values. |
| Incoming Longwave | f8.2 | -999.99 | W/m2. |
| Incoming Longwave Flag | 1 char | M | See Flag values. |
| Outgoing Longwave | f8.2 | -999.99 | W/m2. |
| Outgoing Longwave Flag | 1 char | M | See Flag values. |
| Net Radiation | f8.2 | -999.99 | W/m2. See Equations |
| Net Radiation Flag | 1 char | M | See Flag values. |
| Skin Temperature | f8.2 | -999.99 | Celsius. |
| Skin Temperature Flag | 1 char | M | See Flag values. |
| Incoming PAR | f8.2 | -999.99 | µmol/m2/s. |
| Incoming PAR Flag | 1 char | M | See Flag values. |
| Outgoing PAR | f8.2 | -999.99 | µmol/m2/s. |
| Outgoing PAR Flag | 1 char | M | See Flag values. |