JET2000 filenaming convention

This page defines the filename specification for JET2000 files to be submitted to the BADC.

The format of the file names is as follows:

[platform]YYYYMMDD_[type].[format]

Each of the components of the filename are described below

Components of filename

Identifies the site or observation subtype.

Value	Description
.*	Observation subtype. Any value is excepted, but this should be asc, cns, fs1, lw1, ps1, rad, tmp, tw1, wnd, wv1, etc for aircraft measurements; ds001, ds002, ds003, etc for dropsondes; HHMM_[view] for meteosat images (e.g. 0600_d8 for 06:00 African thermal IR image); [WMO number]_[hour]z for radiosondes and synoptic stations (e.g. 65503_00z); and ndvi for avhrr data.

Start date
The eight character date identifies the start date of the observations in the file. The start date is in the format YYYYMMDD. The observations may span more than one day. The date in the file name is always the start date of the observations.
e.g. '19990110' represents 10th January 1999
Type
Type should be used to describe the type of measurement in the file. It can be given any value, however it should adhere to the following guidelines.
1. It should be descriptive. "time" or "temp" not "t".
2. It should be as short as possible. Remember, this is just the filename other info is contained in the file. e.g "o3" not "ozone_from_visala_ozonesonde"
3. It should be distinct. If you are going to submit a number of files per day of this kind then they cannot have the same type. e.g. "sonde01", ..., "sonde12" not "sonde".
Extension
Extension gives the format of the data.
Allowed values:

Value Description
na Nasa-Ames file

txt free form metadata file

jpg JPEG image file

gif GIF image file

hdf HDF file