OTFC subscans

[sergiopoppi]

OTF acquisitions are performed using an externally-defined target position.
The target is recovered from a separate subscan, whose ID is specified among the OTFC parameters:

ID = subscan unique ID
TYPE = subscan type, in this case ‘OTFC’
TARGET_ID = ID of the subscan where the target position is defined
SPAN = span of the subscan (degrees)
FRAME = target coordinate frame (‘EQ’ or ‘GAL’)
sFRAME = coordinate frame along which the scan is performed (‘EQ’, ‘HOR’ or ‘GAL’)
GEOM = scan geometry:

• LON = constant longitude
• LAT = constant latitude

DIR = scan direction:

• INC = the varying coordinate increases
• DEC = the varying coordinate decreases
  DURATION = scan actual duration in seconds (acceleration/deceleration ramps excluded)

Example of OTFC subscans

1 SIDEREAL 3c147
2 SIDEREAL MySource EQ 12:00:00h 30:00:00 2000.0
3 OTFC 1 1.0d EQ EQ LAT INC 14.0
4 OTFC 1 1.0d EQ EQ LON INC 14.0
5 OTFC 2 2.0d GAL GAL LAT INC 28.0
6 OTFC 2 2.0d GAL GAL LON INC 28.0

Ref: SRT-MAN-10000-004 DISCOS schedule structure