imap_processing.spice.time.et_to_ttj2000ns#
- imap_processing.spice.time.et_to_ttj2000ns(et: _Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float | complex | str | bytes | _NestedSequence[bool | int | float | complex | str | bytes]) ndarray[tuple[int, ...], dtype[float]]#
Convert TDB J2000 epoch seconds to TT J2000 epoch nanoseconds.
Opposite of ttj2000ns_to_et.
- Parameters:
et (float, numpy.ndarray) – Number of seconds since the J2000 epoch in the TDB timescale.
- Returns:
Number of nanoseconds since the J2000 epoch in the TT timescale.
- Return type: