AIPS HELP file for SPECTRAL in 31DEC25

As of Wed Dec 11 7:58:10 2024

HELP SECTION

SPECTRAL
Type: Scalar
Use:  To tell a task whether it should do some operation in a spectral
      chsnnel-dependent fashion or in a channel-independent fashion.
      SPECTRAL > 0 => channel-dependent methods hould be used.

Default: <= 0 => False  => do continuum methods
         >  0 => True   => do spectral methods

Tasks:
  PCAL......Computes antenna-based polarization leakage terms and,
            optionally, also determines source polarization (Q, U, V).
            SPECTRAL false selects the familiar IF dependent solution
            which is stored in the antenna and source tables.
            SPECTRAL true selects a channel-dependent solution which
            is stored in PD (leakage) and CP (source) tables which
            resemble bandpass tables.
  RLDIF.....Determines Right minus Left phase difference, corrects
            cal files
  TRUEP.....Determines true antenna polarization from special data
            sets.
  VHDIF.....Find/apply V minus H linear polarization phase difference.
  XYDIF.....Find/apply X minus Y linear polarization phase difference.

EXPLAIN SECTION