Hi Arthur,
That file is probably a custom file.
Then, you have to know more than just the name of that file,
but its format! They probably can send you a sample file or better
a format definition.
That file has to mention most important infos:
Something like this:
1 Station name
2 - Location
3 - Date
4 - Current Temperature
4 - Humidity
... and so on...
Then check for that info!
Jacques