The San Fernando Observatory Video Spectra-Spectroheliograph |
| |
| Authors: | Stephen R Walton Gary A Chapman |
| |
| Institution: | (1) San Fernando Observatory, California State University, 91330-8268 Northridge, Northridge, CA, U.S.A. |
| |
| Abstract: | We describe recent work in the development of the San Fernando Observatory (SFO) Video Spectra-Spectroheliograph (VSSHG), a spectrum-based instrument for the measurement of the solar Stokes profiles. Its most important features are: simultaneous measurement of Stokes I plus one of Stokes Q, U, or V; spatial sampling of 0.5 arc sec; spectral sampling of 8.8 mÅ; and time sampling of one minute (for one pair of Stokes profile) to three minutes (for all four profiles). Routine data processing is carried out using a moments technique; tests of this technique show it to be reasonably accurate. Sample data are shown and briefly discussed: a longitudinal magnetogram and Dopplergram of NOAA 5573 observed on 17 August, 1989, and a vector magnetic field map and Dopplergram of NOAA 6659 observed on 10 June, 1991. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
