SWITCH_CYCLE Cycle information in switching modes.

Name

Format

Units

Measure

Comments

Columns

Data description

NUM_STEP

Int Number of steps Nstep in the cycle

Data

WEIGHT_ARRAY

Float( Nstep) Weight for each step

OFFSET_ARRAY

Float(2, Nstep) rad DIRECTION Spatial offsets for each step

FREQ_OFFSET_ARRAY

Int( Nstep) Freq. offset identifiers for each step

STEP_DURATION

Float( Nstep) s Duration for each step in the cycle
Notes: The SWITCH_CYCLE table describes the different steps in a complete cycle for an observation mode with modulation in frequency and/or space. There should as many tuple in this table as there are cycles with different characteristics. It is referenced in the SWITCH_CYCLE_LIST collection in the CONFIG_DESCRIPTION table.
Note that phase switching for sideband separation is not considered here since it does not imply a size greater than 1 along the bin axis in the data cell.


NUM_STEP Number of steps Nstepin a full cycle. This will correspond to the number of correlator data bins Nbin .

WEIGHT_ARRAY Weight for each step in the cycle. TBD

OFFSET_ARRAY Offset in radian for each step of the complete cycle. A value of 0.0 means no offset (case with no wobbler switch).

FREQ_OFFSET_ARRAY Collection of FREQ_OFFSET_IDidentifiers, one for each step. A value of -1 means no frequency offset.

STEP_DURATION Duration of each step in the cycle