LSST EFD Client

The LSST EFD Client helps you access the LSST Engineering Facility Database (EFD) inside Sasquatch, which is backed by InfluxDB. The client, EfdClient, handles authentication and provides convenience methods for accessing data in ready-to-use formats:

Features

• The client EfdClient, has several useful functions.

  • get_topics: Return the topics in the EFD.
  • get_fields: Return the fields in a particular topic
  • build_time_range_query: Build an InfluxQL query for a topic and time range
  • select_time_series: Return a DataFrame containing results of a time range query
  • select_packed_time_series: Return a DataFrame with high cadence telemetry expanded into a single DataFrame.
  • select_top_n: Return a DataFrame with the results of just the most recent rows.
  • get_schema: Get metadata for the fields in a particular topic.

• There are also some utilities for dealing with results of queries

  • merge_packed_time_series: Takes a dataframe with records that have multiple samples per entry and returns a dataframe with one record per sample.
  • rendezvous_dataframes: Extend on dataframe with data from another dataframe using the closest record in time in the past, in the future, or nearest overall.

Example notebooks are available in lsst-sqre/system-test.

Documentation is available at https://efd-client.lsst.io.

About

The LSST EFD Client was created by Simon Krughoff and continues to be maintained by his friends and colleagues on the SQuaRE team.