Purpose

bulletind provides access to the IERS "Bulletin D" data to Python or to other software that can process JSON data.

"Bulletin D" is the publication that specifies the "DUT1 offset", the difference between UTC and UT1, in units of 0.1 seconds. This is the value that is ostensibly transmitted on various broadcast time signals, such as WWVB.

The source of the data is https://datacenter.iers.org/availableVersions.php?id=17 and covers April 1991 through the present. (the oldest Bulletin available is Number 21 issued 1991-04-22)

Use

bulletind includes bulletin data that was available the last time the software was updated. Further updates can be downloaded to a per-user cache with the bulletind update command or the get_bulletin_d_data() function. Cached data can be printed as json with bulletind json, as tabular data with bulletind table, or accessed with the get_cached_bulletin_d_data() function.

The structure of the data is described by the BulletinDInfo type. In json and tabular formats, dates are represented in the ISO standard format YYYY-mm-dd.

Development status

The author (@jepler) occasionally develops and maintains this project, but issues are not likely to be acted on. They would be interested in adding co-maintainer(s).