ANTENNA Antenna characteristics.

Name

Format

Units

Measure

Comments

Columns

Data

NAME

String Antenna name

STATION

String Station name

TYPE

String Antenna type

POSITION

Double(3) m POSITION Antenna X,Y,Z phase reference positions

TIME

Double s EPOCH Time when the antenna POSITION has been calibrated

OFFSET

Double(3) m POSITION Axes offset of mount to FEED REFERENCE point

DISH_DIAMETER

Double m Diameter of dish

ASSOC_ANTENNA_ID

Int Associated antenna identifier

Flag information

FLAG_ROW

Bool The row flag
Notes: This sub-table contains the global antenna properties for each antenna in the AEDF. It is indexed directly from the ANTENNA_ARRAY collection in the CONFIG_DESCRIPTION table.
NAME
Antenna name  
STATION
Station name  
TYPE
Antenna type. The reserved keywords include GROUND-BASED1  for conventional antennas would be used in the case of ALMA, SPACE-BASED2 , TRACKING-STN3 .
POSITION
In right-handed frame. X towards the intersection of the equator and the Greenwich meridian, Z towards the pole. The exact frame should be specified in the MEASURE_REFERENCE keyword (IRTF or WGSS4). The reference point is the point on the az or ha axis closest to the el or dec axis.
TIME
Time when the POSITION of this antenna has been determined. Measured reference as used in the MAIN.  
OFFSET
Axes offset of mount to feed reference point.  
DISH_DIAMETER
Nominal diameter of dish, as opposed to the effective diameter.
ASSOC_ANTENNA_ID
Associated antenna identifier. A value of -1 means no associated identifier. When an antenna position has been updated post-observation while it remained on the same station, the antenna tuple corresponding to the ANTENNA_ID used during these observations must be updated to link to an associated new ANTENNA_ID as soon as this new tuple with the updated position has been added in this sub-table. The ASSOC_ANTENNA_ID is the identifier of that new appended tuple.
FLAG_ROW
Boolean to indicate the validity of this entity. Set to True for an invalid row. This does not imply any flagging of the data in the MAIN or TOTAL_POWER_MONITORING, but is necessary as the ANTENNA index in MAIN points directly into the ANTENNA sub-table. Thus FLAG_ROW can be used to delete an antenna entry without re-ordering the ANTENNA indices throughout the MS.