def positionMinError(G, vmini, extension=0.0):
  """
  Calculate the minimum position errors from G and (V-I). These correspond to the sky regions with the
  smallest astrometric errors.

  NOTE! THE ERRORS ARE FOR SKY POSITIONS IN THE ICRS (I.E., RIGHT ASCENSION, DECLINATION). MAKE SURE YOUR
  SIMULATED ASTROMETRY IS ALSO ON THE ICRS.

  Parameters
  ----------

  G     - Value(s) of G-band magnitude.
  vmini - Value(s) of (V-I) colour.

  Keywords
  --------

  extension - Add this amount of years to the mission lifetime and scale the errors accordingly.

  Returns
  -------

  The minimum error in alpha* and the error in delta, in that order, in micro-arcsecond.
  """
  parallaxError = parallaxErrorSkyAvg(G, vmini, extension=extension)
  return _astrometricErrorFactors['alphaStar'].min()*parallaxError, \
         _astrometricErrorFactors['delta'].min()*parallaxError
def positionMinError(G, vmini, extension=0.0):
  """
  Calculate the minimum position errors from G and (V-I). These correspond to the sky regions with the
  smallest astrometric errors.

  NOTE! THE ERRORS ARE FOR SKY POSITIONS IN THE ICRS (I.E., RIGHT ASCENSION, DECLINATION). MAKE SURE YOUR
  SIMULATED ASTROMETRY IS ALSO ON THE ICRS.

  Parameters
  ----------

  G     - Value(s) of G-band magnitude.
  vmini - Value(s) of (V-I) colour.

  Keywords
  --------

  extension - Add this amount of years to the mission lifetime and scale the errors accordingly.

  Returns
  -------

  The minimum error in alpha* and the error in delta, in that order, in micro-arcsecond.
  """
  parallaxError = parallaxErrorSkyAvg(G, vmini, extension=extension)
  return _astrometricErrorFactors['alphaStar'].min()*parallaxError, \
         _astrometricErrorFactors['delta'].min()*parallaxError
def positionMinError ( G , vmini , extension = 0.0 ) : parallaxError = parallaxErrorSkyAvg ( G , vmini , extension = extension ) return _astrometricErrorFactors [ 'alphaStar' ] . min ( ) * parallaxError , _astrometricErrorFactors [ 'delta' ] . min ( ) * parallaxError
Calculate the minimum position errors from G and (V-I). These correspond to the sky regions with the
  smallest astrometric errors.

  NOTE! THE ERRORS ARE FOR SKY POSITIONS IN THE ICRS (I.E., RIGHT ASCENSION, DECLINATION). MAKE SURE YOUR
  SIMULATED ASTROMETRY IS ALSO ON THE ICRS.

  Parameters
  ----------

  G     - Value(s) of G-band magnitude.
  vmini - Value(s) of (V-I) colour.

  Keywords
  --------

  extension - Add this amount of years to the mission lifetime and scale the errors accordingly.

  Returns
  -------

  The minimum error in alpha* and the error in delta, in that order, in micro-arcsecond.
Calculate the minimum position errors from G and ( V - I ) . These correspond to the sky regions with the smallest astrometric errors .