Commit b4a93e66 authored by Wang Xia's avatar Wang Xia
Browse files

Update algorithm.rst

parent 6e380a6b
......@@ -103,26 +103,45 @@ reference file: readnoise file
ERR数据单元构造误差数据,该步误差公式:
.. math::
\begin{equation*}
\sigma = \sqrt{(SCI-bias)+{\sigma_bias}^2 + readnoise^2)}
\end{equation*}
\sigma = \sqrt{(SCI-bias)+{\sigma_bias}^2 + readnoise^2)}
**Dark correction**
class: csst_ms_sls_instrument.steps.DarkCorrStep
reference file:Superdark
Dark correction通过减去superdark的操作,去除掉原始科学数据中的探测器暗电流。Superdark的文件格式与输出文件一致,为包含三个扩展的fits。该步会对superdark的误差和DQ进行传递。
**Flatfield correction**
class: csst_ms_sls_instrument.steps.FlatCorrStep
reference file:Superflat
Flatfield correction通过除flatfield的操作,去除掉像素不均匀性。Superflat的文件格式与输出文件一致,为包含三个扩展的fits。该步会对superflat的误差和DQ进行传递。
**CR rejection**
class: csst_ms_sls_instrument.steps.CRrejStep
reference file:cr model
CR rejection基于无缝光谱图像训练的模型,利用deepCR_ 对单次曝光的科学数据进行宇宙线检测,在DQ中进行标记,标记详情见DQFlags_ 。
.. _deepCR: https://deepcr.readthedocs.io/en/latest/
**To electrons/sec**
class: csst_ms_sls_instrument.steps.CPSStep
reference file:无
数据除以曝光时间,SCI数据单元和ERR数据单元的单位由e转换为e/s。
Position calibration
---------------------
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