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STATE: State information

STATE: State information
Name	Format	Units	Measure	Comments
Columns
Data
SIG	Bool			Signal
REF	Bool			Reference
CAL	Double	K		Noise calibration
LOAD	Double	K		Load temperature
SUB_SCAN	Int			Sub-scan number
OBS_MODE	String			Observing mode
Flags
FLAG_ROW	Bool			Row flag

Notes:

This table defines the state parameters for a particular data record as they refer to external loads, calibration sources or references, and also characterizes the observing mode of the data record, as an aid to defining the scheduling heuristics. It is indexed directly via STATE_ID in MAIN.

SIG

True if the source signal is being observed.

REF

True for a reference phase.

CAL

Noise calibration temperature (zero if not added).

LOAD

Load temperature (zero if no load).

SUB_SCAN

Sub-scan number ( $\geq$ 0), relative to the SCAN_NUMBER in MAIN. Used to identify observing sequences.

OBS_MODE

Observing mode; defined by a set of reserved keywords characterizing the current observing mode (e.g. "OFF-SPECTRUM"). Used to define the schedule strategy.

FLAG_ROW

True if the row does not contain valid data. Does not imply flagging in MAIN.