drifter data

[hroarty]

Any suggestions on how to extract latitude and longitude of the seeds at each time step of the model run?

[AndresSepulveda]

Hi, I am not sure what is what you want do to. You can define the integration time step and the output time step for your particles, and the latitude and longitude are stored for the particles (seeds) by default. Please clarify...

[hroarty]

thanks for responding. How do I access the lat and lon of the particles? I don't see the command to accomplish this?

[AndresSepulveda]

Ah, you can save them in a NetCDF output file with the option

o.run(time_step=900, time_step_output=1800, outfile=outfile)

now if you mean during the run, as part of the output log, that I don't know, sorry

[knutfrode]

During the run (within the update method of your module), positions are accessed as self.elements.lon and self.elements.lat

After the run, positions are accessed with

lons = self.history['lon']
lats = self.history['lat']

or
lons, lats = self.get_lonlats()
The latter is recommended, as invalid positions (unseeded or deactivated) are then also masked.