On the adjustment accuracy of polarization attachments in differential methods of measuring line-of-sight velocities on the Sun.

Details On the adjustment accuracy of polarization attachments in differential methods of measuring line-of-sight velocities on the Sun. On the adjustment accuracy of polarization attachments in differential methods of measuring line-of-sight velocities on the Sun.

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989bsold...7..103v&link_type=abstract

Byulletin Solnechnye Dannye Akademie Nauk USSR, No. 1989/7, p. 103 - 109

Physics

Sun: Velocity Fields

Scientific paper

The velocity signals produced due to different displacements (decentering) of polarization attachments with respect to the solar image have been calculated for differential methods of velocity observations at Crimea, Stanford and the Sayan Observatory. Such displacements may be caused by either a disbalance of guiding systems of deformations of attachment fixation supports. The method now in use at Stanford has a minimum sensitivity to such displacements, nearly an order of magnitude lower than that at Crimea and at Sayan. It is noted that the calculations made are also useful for estimating the differential velocity and brightness in observations of large-scale velocity fields.

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