DOPPLER Doppler tracking information.

Name

Format

Units

Measure

Comments

Columns

Key

DOPPLER_ID

Int Doppler identifier

SOURCE_ID

Int Source identifier

Data

TRANSITION_ID

Int Transition identifier

VELDEF

Double m s-1 DOPPLER Velocity definition of Doppler shift

Notes: This sub-table contains frame information for different Doppler tracking modes. It is indexed from the SPECTRAL_WINDOW_ID sub-table (with SOURCE_ID as a secondary index) and thus allows the specification of a source-dependent Doppler tracking reference for each spectral window. This model allows multiple possible transitions per source per spectral window, but only one reference at any given time.
DOPPLER_ID
Doppler identifier, as used in the SPECTRAL_WINDOW sub-table.
SOURCE_ID
Source identifier (as used in the SOURCE sub-table).
TRANSITION_ID
This index selects the approriate line from the list of transitions stored for each SOURCE_ID in the SOURCE table. A reference catalog for the line transitions need TBD.
VELDEF
Velocity definition of the Doppler shift, e.g. RADIO or OPTICAL velocity in m s-1.