Usage

Command Line

To get started, you can download WAVEWATCH III data by date with the ww3 command (use ww3 --help to print a brief message),

ww3 fetch "2010-05-22"

Python

You can also do this through Python,

>>> from bmi_wavewatch3 import WaveWatch3
>>> WaveWatch3.fetch("2010-05-22")

The bmi_wavewatch3 package provides the WaveWatch3 class for downloading data and presenting it as an xarray Dataset.

>>> from bmi_wavewatch3 import WaveWatch3
>>> ww3 = WaveWatch3("2010-05-22")
>>> ww3.data
<xarray.Dataset>
...

Use the inc method to advance in time month-by-month,

>>> ww3.date
'2010-05-22'
>>> ww3.inc()
'2010-06-22'
>>> ww3.data.time
<xarray.DataArray 'time' ()>
array('2010-06-01T00:00:00.000000000', dtype='datetime64[ns]')
...

This will download new datasets as necessary and load the new data into the data attribute.

Note

If the new data are not cached on you computer, you will notice a delay while the new data are download. If the lazy flag is set, the download will only occur once you try to access the data (i.e. ww3.data), otherwise the data are downloaded as soon as the date is set.