The ExampleSonde data frame has 461 rows and 21 columns.
The columns are different physical measurements made during the balloon's
ascent. ExampleSondeText is an image of a text file that allows for testing the
getsonde function and is an example of a format with metadata used to document a
sounding.
These data are a sounding from a well known field experiment TOGA/COARE studying the larege scale dynamical relationship of the Tropical Pacific and the atmospshere. This particular sounding was launched January 17, 1993 17:12 GMT from Kavieng, New Guninea. To write out the text dataset to a sounding file just use:
data(ExampleSondeText) ; write( ExampleSondeText, file="sondedata.txt")
This data frame contains the following named components:
| time | Time in seconds from the ballon's release, a numeric vector. |
| press | Pressure (mb), a numeric vector |
| temp | Dry-bulb Temperature (deg. C), a numeric vector |
| dewpt | Dew point temperaure (deg. C), a numeric vector |
| rh | Relative humidity (%), a numeric vector |
| uwind | East-West component of the wind, a numeric vector |
| vwind | North-South component of the wind, a numeric vector |
| wspd | wind speed (m/s), a numeric vector |
| dir | Wind direction, a numeric vector |
| dz | Ascension rate (m/s), a numeric vector |
| lon | Longitude, a numeric vector |
| lat | Latitude, a numeric vector |
| rng | range, a numeric vector |
| az | azimuth (angle along horizon), a numeric vector |
| alt | altitude (m), a numeric vector |
| qp | QC flag for pressure, a numeric vector |
| qt | QC flag for temperature, a numeric vector |
| qh | QC flag for humidity, a numeric vector |
| qu | QC flag for U component, a numeric vector |
| qv | QC flag for V component, a numeric vector |
| quv | QC flag for ascension rate, a numeric vector |