FOCUS Focus information.

Name

Format

Units

Measure

Comments

Columns

Key

ANTENNA_ID

Int Antenna identifier

FEED_ID

Int Feed identifier

TIME

Double s EPOCH Interval mid-point

INTERVAL

Double s Time interval for validity of the parameters

Data

FOCUS_POSITION

Double(3) m Focus position

FOCUS_TRACKING

Bool True if tracking the target position

FOCUS_MODEL_ID

Int Focus 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 one element in the ANTENNA_ARRAY collection in the CONFIG_DESCRIPTION table.
FEED_ID
Feed identifier, as indexed in the FEED_LIST collection in the CONFIG_DESCRIPTION table.
TIME
Mid-point of time interval for which the focus parameters in the row are valid. The same reference used for the TIME column in the MAIN must be used.
INTERVAL
Time interval.
FOCUS_POSITION
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 and thermal effects.
FOCUS_OFFSET
Offset applied in the focus position relative to the target position.