SHORT_SD_WEIGHT

    REAL weight scaling factor for the generated visibilities.

    It is a relative scaling factor in the weights compared to a supposedly  op-
    timal  weighting  to  give  the best combined synthesized beam. That optimal
    weighting essentially gives the same weight density par unit area in the  UV
    plane  than  the  shortest  baselines measured with the interferometer only.
    However, if the single-dish data has not been observed long enough,  or  has
    baselines  problems  for  example,  this weight may add noise to the overall
    data set, so could be down-weighted.

      Default: 1.0

    See also SHORT_CHANNELS for other issues about noise estimate.