argopy.ArgoFloat

class ArgoFloat(*args, **kwargs)

Argo GDAC float store

This store makes it easy to load/read/visualize data for a given float from any GDAC location and netcdf files

Examples

Listing 19 A float store is instantiated with float WMO number and a host (any access path: local, http, ftp or s3) where float files are to be found.

from argopy import ArgoFloat
af = ArgoFloat(WMO)  # Use argopy 'gdac' option by default
af = ArgoFloat(WMO, host='/home/ref-argo/gdac')  # Use your local GDAC copy
af = ArgoFloat(WMO, host='http')   # Shortcut for https://data-argo.ifremer.fr
af = ArgoFloat(WMO, host='ftp')    # shortcut for ftp://ftp.ifremer.fr/ifremer/argo
af = ArgoFloat(WMO, host='s3')     # Shortcut for s3://argo-gdac-sandbox/pub

Listing 20 Load/read GDAC netcdf files as a xarray.Dataset or netCDF4.Dataset

af.ls_dataset() # Return a dictionary with all available datasets for this float
ds = af.open_dataset('prof') # Use keys from the available datasets dictionary
ds = af.open_dataset('meta')
ds = af.open_dataset('tech')
ds = af.open_dataset('Rtraj')
ds = af.open_dataset('Sprof')

ds = af.open_dataset('Sprof', netCDF4=True)  # Return a netCDF4 Dataset instead of an xarray

Listing 21 Other attributes and methods

af.N_CYCLES  # Number of cycles (estimated)
af.path  # root path for all float datasets
af.dac   # name of the DAC this float belongs to
af.metadata  # a dictionary with all available metadata for this file (from netcdf or fleetmonitoring API)
af.ls()  # list af.path folder content

Listing 22 Working with float profiles

af.lsprofiles() # list float "profiles" folder content
af.describe_profiles()  # Pandas DataFrame describing all available float profile files

Listing 23 Quick plotting methods

af.plot.trajectory()
af.plot.trajectory(figsize=(18,18), padding=[1, 5])
af.plot.map('TEMP', pres=450, cmap='Spectral_r')
af.plot.map('DATA_MODE')
af.plot.scatter('TEMP')
af.plot.scatter('PSAL_QC')
af.plot.scatter('DOXY', ds='Sprof')
af.plot.scatter('MEASUREMENT_CODE', ds='Rtraj')

__init__(*args, **kwargs)

Create an Argo float store

Parameters:

• wmo (int or str) – The float WMO number. It will be validated against the Argo convention and raise an ValueError if not compliant.

• host (str, optional, default: OPTIONS['gdac']) –

  Local or remote (http, ftp or s3) path where a dac folder is to be found (compliant with GDAC structure).

  This parameter takes values like:

  • a local absolute path

  • https://data-argo.ifremer.fr, shortcut with http or https

  • https://usgodae.org/pub/outgoing/argo, shortcut with us-http or us-https

  • ftp://ftp.ifremer.fr/ifremer/argo, shortcut with ftp

  • s3://argo-gdac-sandbox/pub, shortcut with s3 or aws

• aux (bool, default = False) – Should we include dataset from the auxiliary data folder. The ‘aux’ folder is expected to be at the same path level as the ‘dac’ folder on the GDAC host.

• cache (bool, optional, default: False) – Use cache or not.

• cachedir (str, optional, default: OPTIONS['cachedir']) – Folder where to store cached files.

• timeout (int, optional, default: OPTIONS['api_timeout']) – Time out in seconds to connect to a remote host (ftp or http).

Methods

__init__(*args, **kwargs)	Create an Argo float store
dataset([name])
describe_profiles()	Return a pandas.DataFrame describing profile files
load_dac()	Load the DAC short name for this float
load_index()	Load the Argo full index in memory and trigger search for this float
load_metadata()	Load float metadata from Euro-Argo fleet-monitoring API
load_metadata_from_meta_file()	Method to load float meta-data from the netcdf file
load_technicaldata()	Load float technical data from Euro-Argo fleet-monitoring API
ls()	Return the list of files in float path
ls_dataset()	List all available dataset for this float in a dictionary
lsprofiles()	Return the list of files in float profiles path
open_dataset([name, cast])	Open and decode a dataset

Attributes

N_CYCLES	Number of cycles
api_point	Euro-Argo fleet-monitoring API points
dac	Name of the DAC responsible for this float
host_protocol	Protocol of the GDAC host
host_sep	Host path separator
metadata	A dictionary of float meta-data
path	Return root path for all float datasets
technicaldata	A dictionary holding float technical data