Downloading data

arvi can use the DACE API to download data products for a specific target.
Each RV instance has three distinct methods for downloading CCFs, S1Ds, and S2Ds.

from arvi import RV

s = RV('HD69830')

s.download_ccf()
s.download_s1d()
s.download_s2d()

By default, this will download the files into a folder called [star]_downloads. The methods all share the same arguments and are documented below.

As an example, we can download the 5th S2D file from ESPRESSO19 into a specific directory

s.download_s1d(instrument='ESPRESSO19', index=5, directory='some_directory')

Note

Depending on your network, the downloads can be slow, especially when downloading many large S2D files like those from ESPRESSO for example.

`arvi.timeseries.RV.download_ccf(instrument=None, index=None, limit=None, directory=None, clobber=False, symlink=False, load=True, prefer_skysub=False, **kwargs)`

Download CCFs from DACE

Parameters:

Name	Type	Description	Default
`instrument`	`str`	Specific instrument for which to download data	`None`
`index`	`int`	Specific index of point for which to download data (0-based)	`None`
`limit`	`int`	Maximum number of files to download	`None`
`directory`	`str`	Directory where to store data	`None`
`clobber`	`bool`	Overwrite existing files	`False`
`load`	`bool`	Load CCFs into `self.CCF` using iCCF	`True`
`prefer_skysub`	`bool`	Prefer SKYSUB CCFs if they exist	`False`

`arvi.timeseries.RV.download_s1d(instrument=None, index=None, limit=None, directory=None, clobber=False, apply_mask=True, symlink=False, **kwargs)`

Download S1Ds from DACE

Parameters:

Name	Type	Description	Default
`instrument`	`str`	Specific instrument for which to download data	`None`
`index`	`int`	Specific index of point for which to download data (0-based)	`None`
`limit`	`int`	Maximum number of files to download.	`None`
`directory`	`str`	Directory where to store data.	`None`
`clobber`	`bool`	Whether to overwrite existing files.	`False`
`apply_mask`	`bool`	Apply mask to the observations before downloading.	`True`

`arvi.timeseries.RV.download_s2d(instrument=None, index=None, limit=None, directory=None, clobber=False, symlink=False, **kwargs)`

Download S2Ds from DACE

Parameters:

Name	Type	Description	Default
`instrument`	`str`	Specific instrument for which to download data	`None`
`index`	`int`	Specific index of point for which to download data (0-based)	`None`
`limit`	`int`	Maximum number of files to download.	`None`
`directory`	`str`	Directory where to store data.	`None`
`clobber`	`bool`	Whether to overwrite existing files.	`False`