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An IDL Downloadable Module
version 0.5, compiled with das2c post v2.3.0
Das2 servers typically provide data relevant to space plasma and magnetospheric physics research. To retrieve data, an HTTP GET request is posted to a das2 server by a client program and a self-describing stream of data values covering the requested time range, at the requested time resolution, is provided in the response body. This software, das2dlm provides new new IDL system routines for sending data requests and reading the responses directly into memory.
Since this DLM wraps the das2C and
to present function names that are distinct from das2pro,
the IDL das2 client, all functions and structures have prefix das2c_.
The functions in this DLM fall into the following categories.
Inspect Data Sources
- das2c_srclist - Provide a list of data source paths on a (das2 server)[https://github.com/das-developers/das2py-server].
- das2c_srcinfo - Provide call parameter information for a das2 server.
Getting Data
- das2c_readhttp - Issue an HTTP GET query, and save the results.
Using Query Results
- das2c_results - List/Get stored query results
- das2c_datasets - List/Get datasets in a query result
- das2c_dsinfo - Provided human-readable summary of a dataset
- das2c_props - List/Get metadata properties in a dataset or a variable group
- das2c_pdims - List/Get variable groups in a dataset
- das2c_vars - List/Get a variable in a group
- das2c_data - Get data arrays and slices of data arrays from variables
Utilities
- das2c_free - Free query result memory.
- das2c_convert - Convert data from one set of units to another, including epoch units
- das2c_auth - Handle authentication information for protected data sources.
What you won't find in das2dlm are plotting functions. IDL provides a rich plotting infastructure. It is the purpose of this module to get data to you so that you can plot it however you like, though a couple full plot examples are included to demonstrate how the API function work in the context of plot generation.
- ex01_juno_waves_survey.pro - Plotting Juno/Waves Survey data
- ex02_cassini_fce_ephem.pro - Plotting Cassini/MAG E. Cyclotron with location
Also, the Usage section the repository ReadMe.md provides a tutorial introduction to the module.
If you use IDL for space-physics research, I hope das2dlm is useful for you. Feel free to open an issue for any problems you detect, or feature requests. If you feel the discussions section for the repository should be opened, enter that request as an issue.
Thanks for using das2dlm.