UTCTAIBulletinAFilesLoader (OREKIT 12.2 API)

java.lang.Object
- org.orekit.data.AbstractSelfFeedingLoader
- - org.orekit.time.UTCTAIBulletinAFilesLoader

All Implemented Interfaces:

UTCTAIOffsetsLoader
```
public class UTCTAIBulletinAFilesLoader
extends AbstractSelfFeedingLoader
implements UTCTAIOffsetsLoader
```
Loader for UTC-TAI extracted from bulletin A files.
This class is a modified version of BulletinAFileLoader that only parses the TAI-UTC header line and checks the UT1-UTC column for discontinuities.

Note that extracting UTC-TAI from bulletin A files is NOT recommended. There are known issues in some past bulletin A (for example bulletina-xix-001.txt from 2006-01-05 has a wrong year for last leap second and bulletina-xxi-053.txt from 2008-12-31 has an off by one value for TAI-UTC on MJD 54832). This is a known problem, and the Earth Orientation Department at USNO told us this TAI-UTC data was only provided as a convenience and this data should rather be sourced from other official files. As the bulletin A files are a record of past publications, they cannot modify archived bulletins, hence the errors above will remain forever. This UTC-TAI loader should therefore be used with great care.

This class is immutable and hence thread-safe

Since:

7.1

Author:

Luc Maisonobe

Constructor Summary

Constructors
Constructor	Description
`UTCTAIBulletinAFilesLoader(String supportedNames)`	Build a loader for IERS bulletins A files.
`UTCTAIBulletinAFilesLoader(String supportedNames, DataProvidersManager manager)`	Build a loader for IERS bulletins A files.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

List<OffsetModel> loadOffsets()
Load UTC-TAI offsets entries.
- Methods inherited from class org.orekit.data.AbstractSelfFeedingLoader
  feed, getDataProvidersManager, getSupportedNames, setSupportedNames
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - UTCTAIBulletinAFilesLoader
```
@DefaultDataContext
public UTCTAIBulletinAFilesLoader(String supportedNames)
```
    Build a loader for IERS bulletins A files. This constructor uses the default data context.
    
    Parameters:
    
    supportedNames - regular expression for supported files names
  - UTCTAIBulletinAFilesLoader
```
public UTCTAIBulletinAFilesLoader(String supportedNames,
                                  DataProvidersManager manager)
```
    Build a loader for IERS bulletins A files.
    
    Parameters:
    
    supportedNames - regular expression for supported files names
    
    manager - provides access to the bulletin A files.
- Method Detail
  - loadOffsets
```
public List<OffsetModel> loadOffsets()
```
    Load UTC-TAI offsets entries.
    
    Specified by:
    
    loadOffsets in interface UTCTAIOffsetsLoader
    
    Returns:
    
    sorted UTC-TAI offsets entries (if the linear offsets used prior to 1972 are missing, they will be inserted automatically)