Upgraded Coronal Multi-channel Polarimeter (UCoMP) Data
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UCoMP images the solar coronal in several emission lines with a narrow passband wavelength tunable filter. UCoMP records full Stokes polarimetry (Intensity, 2 states of linear polarization, circular polarization) over a full field-of-view from 1.04 to 2 solar radii. Level 1 and 2 images are 32-bit 1280x1024, with 3 arcsecond pixels. Level 1 data comprises the images of the 4 Stokes parameters at wavelengths across the emission lines. Level 2 data products include maps of line intensity, enhanced intensity, linear polarization degree, plane-of-sky magnetic field direction, emission line width and doppler velocity. Time series of velocity can be used to infer the plane-of-sky magnetic field through coronal seismology.
UCoMP 采用窄带通波长可调谐滤光器(narrow passband wavelength tunable filter),对太阳日冕开展多发射线成像观测。该设备可在覆盖1.04至2倍太阳半径的全视场内获取完整斯托克斯偏振测量(full Stokes polarimetry)数据,包含强度、两种线偏振态以及圆偏振信息。1级与2级图像均为32位深度、1280×1024分辨率,像素角分辨率为3角秒(arcsecond)。1级数据包含各发射线对应波长下的4个斯托克斯参数(Stokes parameters)图像。2级数据产品涵盖谱线强度、增强强度、线偏振度、天面磁场方向(plane-of-sky magnetic field direction)、发射线宽度以及多普勒速度的二维分布图。可通过日冕震学(coronal seismology)方法,利用速度时间序列推断天面磁场分布。



