The SOLIS Vector Spectromagnetograph

The SOLIS Vector Spectromagnetograph (VSM) is an f/6.6
Ritchey-Chretien telescope having a 50-cm aperture. VSM uses 256 by 1024 pixel
300 frames/s CCD cameras and ferroelectric polarization modulators. VSM measures
Stokes I, Q, U and V profiles in FeI 630.15 and 630.25 nm lines, Stokes I and V
profiles in the CaII 854.2 nm line and Stokes I profile in the HeI 1083.0 nm line.
Spatial resolution is 1.0 by 1.0 arcsec over a 2048 by 2048 arcsec field
(covering the solar disk). Scan rate is variable between 0.05 and 5.0 s/arcsec.
The VSM provides the following core science data products: (a) photospheric
full-disk vector-magnetograms using the FeI 630.15 and 630.25 nm lines
(field strength, azimuth, inclination, flux, Doppler velocity, continuum intensity);
(b) chromospheric full-disk magnetograms using the CaII 854.2 nm line (line-of-sight
magnetic flux, Doppler velocity, line core intensity); (c) full-disk HeI 1083.0 nm
line characteristics (equivalent width, continuum intensity, Doppler velocity, line
depth, line asymmetry, Doppler width, Si line width, Si line depth, Si Doppler
velocity); (d) photospheric full-disk longitudinal magnetograms using the FeI 630.15
and 630.25 nm lines (line-of-sight magnetic flux). Data products (a) to (c) are
produced three times a day while data product (d) were expected to be be produced
once a day.

SOLIS矢量光谱磁像仪（VSM）是一款配备50厘米口径f/6.6 Ritchey-Chretien望远镜的仪器。VSM采用256×1024像素、300帧/秒的CCD相机以及铁电偏振调制器。该设备能够测量FeI 630.15和630.25纳米线中的Stokes I、Q、U和V谱线，CaII 854.2纳米线中的Stokes I和V谱线，以及HeI 1083.0纳米线中的Stokes I谱线。空间分辨率为1.0×1.0角秒，覆盖2048×2048角秒的视场（包括太阳光球）。扫描速率可在0.05至5.0秒/角秒之间调整。VSM提供以下核心科学数据产品：(a)利用FeI 630.15和630.25纳米线产生的光球全盘矢量磁图（磁场强度、方位、倾角、通量、多普勒速度、连续强度）；(b)利用CaII 854.2纳米线产生的色球全盘磁图（视向磁场通量、多普勒速度、谱线核心强度）；(c)全盘HeI 1083.0纳米线特征（等效宽度、连续强度、多普勒速度、谱线深度、谱线不对称性、多普勒宽度、Si线宽度、Si线深度、Si多普勒速度）；(d)利用FeI 630.15和630.25纳米线产生光球全盘纵向磁图（视向磁场通量）。数据产品(a)至(c)每日产生三次，而数据产品(d)预计每日产生一次。