What's the difference between Antenna1 and Antenna2? Axis definitions in plotms

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Plotms is a powerful tool for visualizing your measurement set, and provides you with lots of choices for X- and Y- Axes. It's not always clear what the choices mean, so below are some explanations.

Scan

The scan number, as listed by listobs.

Field

The field number, as listed by listobs. Typically, each source should have a different field number.

Time

The time at which the visibility was observed, given in terms of calendar year (yyyy/mm/dd/hh:mm:ss.ss)

Time_interval

??? Is this integration time?? In what units?? ???

Spw

The spectral window number (analogous to what VLA users know as an IF). The characteristics of each spectral window are listed in listobs.

Channel

The frequency channel


Frequency

Corr

Antenna1

Antenna2

Baseline

UVDist

UVDist_L

U

V

W

Velocity

Amp

Phase

Real

Imag

Flag

Azimuth

Elevation

HourAngle

ParAngle

Antenna

Ant-Azimuth

Ant-Elevation

Ant-ParAng

Row

FlagRow