dopplerTab.html

Table 1:

DOPPLER: Doppler tracking information


Name	Format	Units	Measure	Comments

Columns

Key
DOPPLER_ID	Int			Doppler tracking id.
SOURCE_ID	Int			Source id.

Data
TRANSITION_ID	Int			Transition id.
VELDEF	Double	m/s	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_IDsub-table (with SOURCE_IDas 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_IDin the SOURCE table.
VELDEF: Velocity definition of the Doppler shift, e.g. RADIO or OPTICAL velocity in ms^-1