Module historical_sofa 

Pre-1972 TAI−UTC historical offsets and linear drift rates from the official USNO tai-utc.dat (used by IAU SOFA).

Provides the piecewise-linear formula for UTC instants before 1972-01-01.

Structs

TaiUtcPre1972

Constants

SOFA_TAI_UTC_PRE_1972

Authoritative pre-1972 TAI−UTC entries from the official USNO tai-utc.dat file.
These 13 intervals contain the frequency offsets and linear drifts used by the IAU SOFA library and all other high-precision astronomy/time-conversion software before UTC switched to pure leap-second mode.

Functions

historical_sofa_offset_for_non_adjusted

Returns the SOFA historical TAI−UTC offset (in seconds) for a given UTC instant.