focusTab.html

Table 1:

FOCUS: Focus information

Columns

Keywords

Key

Data


Name	Format	Units	Measure	Comments



ANTENNA_ID	Int			Antenna id
FEED_NUM	Int			Feed number
TIME	Double	s	EPOCH	Integration midpoint
INTERVAL	Double	s		Time interval

FOCUS	Double(3)	m		Focus position
FOCUS_TRACKING	Bool			True if tracking the target position
FOCUS_MODEL_ID	Int			Focus model identifier
FOCUS_OFFSET	Double(3)	m		Focus position offset

Notes: This table contains information concerning the focus for each antenna as a function of TIME. Note that the receptor dependent part of the focus is located in the FEED table. N.B.: The number of rows in this table is expected to be significantly smaller than in the POINTING table.

ANTENNA_ID: Antenna number, as indexed from ANTENNAn in MAIN
FEED_ID: Feed number, as indexed from FEEDn in the MAIN .
TIME: Mid point of time interval for which the feed parameters in the row are valid. The same reference used for the TIME column in the MAIN must be used.
INTERVAL: Time interval.
FOCUS: Actual focus position.
FOCUS_TRACKING: True if tracking the target position.
FOCUS_MODEL_ID: Model providing the target position. The FOCUS_MODEL table will be defined at a later stage. The receptor dependent part of the model is located in the FEED table. The model would includes e.g. antenna elevation effects and thermal effecs.
FOCUS_OFFSET: Offset applied in the focus position relative to the target position.