VCALC(1)

NAME

     vcalc - strategy module for vcalc: calculation  of  velocity
     (uncalibrated  line shift) from sets of four MDI filtergrams
     using the MDI method

SYNOPSIS

     vcalc [-qv] [argument= value ...]

DESCRIPTION

     vcalc produces Dopplergrams using the  onboard  "MDI"  algo-
     rithm  for  determining  velocity  from  sets of filtergrams
     exposed at the nominal filter positions of -120 mA, -40  mA,
     +40  mA,  +120  mA from the Lyot filter transmission center,
     respectively.

     The -q option prints out the list of required arguments  and
     their  default  or environmental values, then quits.  The -v
     option sets verbose mode, redirecting history from stdout to
     stderr.

OPTIONS

     in1=name            dataset containing filtergram 1 at  -120
                         mA (no default)

     in2=name            dataset containing filtergram 1  at  -40
                         mA (no default)

     in3=name            dataset containing filtergram 1  at  +40
                         mA (no default)

     in4=name            dataset containing filtergram 1 at  +120
                         mA (no default)

     vtable=name         velocity    lookup    table    (default:
                         /home/soi/tables/VTable.fits)

     out=name            output dataset (default: Vobs.fits)

EXAMPLES

FILES

     /home/soi/tables/VTable.fits

SEE ALSO

     ipvcalc(1), mdi_vcalc(3)

DIAGNOSTICS

BUGS

     Doesn't die gracefully or do anything useful on  failure  to
     find data.

     ipvcalc and vcalc are very similar  and  might  be  consoli-
     dated.

AUTHOR

     Katie Scott

HISTORY

     1994-02-14     SOI Version 0.8