ostk.physics.coordinate.frame.provider.iers.BulletinA¶

class BulletinA¶

Bases: pybind11_object

Contains rapid determinations for Earth orientation parameters: x/y pole, UT1-UTC and their errors at daily intervals and predictions for 1 year into the future.

The contents of IERS Bulletin A are divided into four sections:

1. General information including key definitions and the most recently adopted values of DUT1 and TAI-UTC.

2. Quick-look daily estimates of the EOPs determined by smoothing the observed data. This involves the application of systematic corrections and statistical weighting. The results are published with a delay of about one to three days between the date of publication and the last available date with estimated EOP.

3. Predictions of x, y, and UT1-UTC, up to 365 days following the last day of data. The predictions use similar algorithms based on seasonal filtering and autoregressive processing for x, y, and UT1.

4. The combination series for the celestial pole offsets. Bulletin A contains celestial pole offsets with respect to the IAU1980 Nutation theory (dpsi and deps) and the IAU 2000 Resolutions (dX and dY), beginning on 1 January 2003.

Reference:: https://datacenter.iers.org/productMetadata.php?id=6

Methods

`access_observation_interval`	Access the observation interval.
`access_prediction_interval`	Access the prediction interval.
`access_release_date`	Access the release date.
`access_tai_minus_utc`	Access the TAI-UTC.
`access_tai_minus_utc_epoch`	Access the TAI-UTC epoch.
`get_observation_at`	Get observation at a given instant.
`get_observation_interval`	Get observation interval.
`get_prediction_at`	Get prediction at a given instant.
`get_prediction_interval`	Get prediction interval.
`get_release_date`	Get release Date of Bulletin A.
`get_tai_minus_utc`	Get TAI-UTC.
`get_tai_minus_utc_epoch`	Get TAI-UTC epoch.
`is_defined`	Returns true if the bulletin is defined.
`load`	Load Bulletin A from a file.
`undefined`	Undefined factory function.

access_observation_interval( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, ) → ostk.physics.time.Interval¶

Access the observation interval.

Returns:: The observation Interval of Instants.
Return type:: Interval

access_prediction_interval( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, ) → ostk.physics.time.Interval¶

Access the prediction interval.

Returns:: The prediction Interval of Instants.
Return type:: Interval

access_release_date( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, ) → ostk.physics.time.Date¶

Access the release date.

Returns:: The release date.
Return type:: Date

access_tai_minus_utc( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, ) → ostk.physics.time.Duration¶

Access the TAI-UTC.

Returns:: The TAI-UTC.
Return type:: Duration

access_tai_minus_utc_epoch( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, ) → ostk.physics.time.Instant¶

Access the TAI-UTC epoch.

Returns:: The TAI-UTC epoch.
Return type:: Instant

get_observation_at( self: ostk.physics.coordinate.frame.provider.iers.BulletinA, instant: ostk.physics.time.Instant, ) → ostk::physics::coordinate::frame::provider::iers::BulletinA::Observation¶