This application creates harp observation files from csv files. It is meant for making harp more accessible when you have observation data in a non-standard format, by providing a conversion from a very simple csv format to the more complex file format expected by harp.
The best way to install this is by downloading a binary release from the releases page. Detailed instructions for how to do this is available here.
The application works on csv files, containing observation data. They look like this:
time, T2m, AccPcp24h
2021-09-17T06:00:00Z, 12.4, 0.2
2021-09-17T07:00:00Z, 12.7,
The first line must contain a header, describing the data to come. The first element must be time, but the rest can be any valid harp parameter name. The following lines contains the data - with the first element containing the observation time, formatted using the RFC3339 format. The following values are floats, and can be empty to signal missing data.
Note that most spreadsheets have a feature for exporting data as csv, so working with data in spreadsheets should be fairly easy.
A more complete example of how to use this application can be found here.
The application takes several command-line arguments, many of which are mandatory. Run the application with --help to see the full list of arguments.
An example invocation may look like this:
mkharp -create -sid 1492 -elevation 94 -lat 10.72 -lon 59.9423 -obstype synop -out OBSTABLE_2021.sqlite < data.csvThis creates a file, called OBSTABLE_2021.sqlite, populating with data for a station with id 1492, and the given latitude, longitude and elevation. Observation type is set to synop, and the actual observation data is read from a file, called data.csv. The format of the data file is described above.
Note that this command fails if the output file already exists with the given obstype. Drop the -create option if you wish to add data to an existing file.