Overview
Weather stations have been deployed at several sites of interest to the CCAT project. The data are available in text files in two formats.
Format 1 (.txt)
Format produced by weather station data logger. Data in columns, separated by commas. Comment lines prefaced with "#". Occasional extraneous text at ends of lines (mostly excised).
| Column | Quantity | Unit | Remark |
|---|---|---|---|
| 1 | unit | id number | |
| 2 | date | yy/mm/dd | |
| 3 | time | hh:mm:ss | time zone depends on unit |
| 4 | wind speed (average) | m s-1 | average in 15 min interval |
| 5 | wind direction (average) | degrees from North | average in 15 min interval |
| 6 | wind direction variation | degrees | standard deviation in 15 min interval |
| 7 | wind speed (peak) | m s-1 | peak in 15 min interval |
| 8 | temperature | °C | |
| 9 | relative humidity | % | |
| 10 | pressure | mbar | |
| 11 | battery | V | |
| 12 | zero |
Time zone settings
| Unit | UT Offset [h] | Location and Duration |
|---|---|---|
| 1 | -4 | Cerro Toco, sulphur mine, 2004 May |
| 2 | 0 | Cordon Honar shoulder, 2005 April - 2006 April |
| Cerro Chajnantor, CCAT site, 2006 May onward | ||
| 3 | 0 | Cerro Toco, summit, 2002 March-July |
| -4 | Cerro Toco, sulphur mine, 2004 May-July | |
| Cerro Negro, 2004 December - 2006 May 3 17:47 UT | ||
| 0 | Cerro Negro, 2006 May 3 17:47 UT onward |
Format 2 (.dat)
Same format as ALMA/NRAO data files. Data in columns, separated by blanks. Comment lines prefaced with "#".
| Column | Quantity | Unit | Remark |
|---|---|---|---|
| 1 | year | ||
| 2 | month | ||
| 3 | day | ||
| 4 | time | hours | UT |
| 5 | date | day | since 1995 January 1 0 UT |
| 6 | date of year | day | since January 1 0 UT of current year |
| 7 | date of month | day | since 0 UT of start of current month |
| 8 | unit | id number | |
| 9 | wind speed (average) | m s-1 | average in 15 min interval |
| 10 | wind direction (average) | degrees from North | average in 15 min interval |
| 11 | wind direction variation | degrees | standard deviation in 15 min interval |
| 12 | wind speed (peak) | m s-1 | peak in 15 min interval |
| 13 | temperature | °C | |
| 14 | relative humidity | % | |
| 15 | pressure | mbar | |
| 16 | battery | V |