Content-type: text/html Manpage of smaflux

smaflux

Section: User Commands (1)
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NAME

smaflux - Set the flux scale of a vis dataset given a planet obs.  

PERSON RESPONSIBLE

jhz  

CATEGORIES

calibration  

DESCRIPTION

SmaFlux is a MIRIAD program which corrects the flux density scale in visibility datasets. In doing this, it assumes that the flux density scale is out by a constant factor. SmaFlux looks for observations of planets, and given its model of the planetary visibility function, it computes the factor needed to correct the flux density scale of the data set. The values of the Planck whole disk brightness temperature from the SMA planetary model (http://sma1.sma.hawaii.edu/planetvis.html) are adopted for brightness temperature of a planet or a moon which is included in the following list: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Ganymede, Callisto, Titan, Ceres, Pallas, Vesta.

To fix the flux density scale, SmaFlux creates or modifies calibration tables attached to each dataset. To run this program, the data directory for the SMA planetary model needs to be installed by excuting the following script: cd $MIR/install get_smaplmodel  

PARAMETERS

vis
Input visibility datasets. Several datasets can be given (wildcards are supported). The datasets should include observations of a planet.
select
Normal uv-selection parameter. This selects the data in the input datasets to analyse. See the help on ``select'' for more information. smaflux will use any data that has a source name which it recognises as a planet. You may wish to select just the shortest spacing, where the planet is strongest.
mirhome
location of MIRIAD's home directory; The default is $MIR.
options
Extra processing options. Several can be given, separated by commas.
  vector  Use the real part (rather than amplitude) of the data and
          model. This option should be used if the visibility data 
          are phase calibrated.
  noapply Do not apply the scale factor (just evaluate it).
  nofqav  When dealing with amplitude data, SMAFLUX normally
          averaging in frequency first, to avoid noise
          biases. The nofqav disables this averaging.


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

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Time: 18:35:38 GMT, July 05, 2011