This is the documentation for the
viresclient Python package. This is a tool which connects to a VirES server through the WPS interface and handles product requests and downloads.
The cdflib library is used to read CDF files.
Python ≥ 3.5 is required for full support. Python 3.4 can also be used, but conversion from CDF to pandas/xarray is not supported - you can still download and save CDF files -
.to_file(), or download as CSV files and convert to pandas -
as_dataframe(). (Partial?) support for 2.7 and 3.4 could be added in the future, but their usage is not recommended (https://python3statement.org/).
It can currently be installed with:
pip install viresclient
Jinja2 pandas cdflib tables tqdm xarray
Import the package and set up the connection to the server:
from viresclient import SwarmRequest import datetime as dt request = SwarmRequest(url="https://staging.viresdisc.vires.services/openows", username="your username", password="your password")
Choose which collection to access:
Choose a combination of variables to retrieve.
measurements are measured by the satellite and members of the specified
models are evaluated on the server at the positions of the satellite;
auxiliaries are additional parameters not unique to the
residuals is set to
True then only data-model residuals are returned. Optionally specify a resampling of the original time series with
sampling_step (an ISO-8601 duration).
request.set_products(measurements=["F","B_NEC"], models=["MCO_SHA_2C", "MMA_SHA_2C-Primary", "MMA_SHA_2C-Secondary"], auxiliaries=["QDLat", "QDLon", "MLT", "OrbitNumber", "SunZenithAngle"], residuals=False, sampling_step="PT10S")
Set a parameter range filter to apply. You can add multiple filters in sequence
request.set_range_filter(parameter="Latitude", minimum=0, maximum=90) request.set_range_filter("Longitude", 0, 90)
Specify the time range from which to retrieve data, make the request to the server (specifying the output file format, currently either csv or cdf):
data = request.get_between(start_time=dt.datetime(2016,1,1), end_time=dt.datetime(2016,1,2), filetype="cdf", asynchronous=True)
df = data.as_dataframe() ds = data.as_xarray() data.to_file('outfile.cdf', overwrite=False)
- The returned data has columns for:
Spacecraft, Timestamp, Latitude, Longitude, Radius
- those specified by
- … and model values and residuals, named as:
F_<model_id>– scalar field
B_NEC_<model_id>– vector field
F_res_<model_id>– scalar field residual (
F - F_<model_id>)
B_NEC_res_<model_id>– vector field residual (
B_NEC - B_NEC_<model_id>)