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SLS pipeline
============
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Instrument correction
---------------------

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概述
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`csst_ms_sls_instrument` 程序包是应用于CSST无缝光谱模块的仪器效应改正程序,无缝光谱模块包含12个9k×9k探测器,每4块探测器对应1个波段,每个波段的部分仪器参数如下:
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    - GU: 660×660″ field of view from 255-400nm with a plate scale of 0.074″/pixel
    - GV: 660×660″ field of view from 400-620nm with a plate scale of 0.074″/pixel
    - GI: 660×660″ field of view from 620-1000nm with a plate scale of 0.074″/pixel
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`csst_ms_sls_instrument` 将顺序执行一系列的探测器效应改正,生成单次曝光图像预处理后的数据产品。该程序是用Python语言实现,代码地址:code_。
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.. _code: https://csst-tb.bao.ac.cn/code/csst-l1/sls/csst_ms_sls_instrument
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数据产品
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`csst_ms_sls_instrument` 将从`csst_common.CsstMsDataManager` 获取0级数据和参考文件。0级数据是有一个扩展的fits文件,头文件中存放着观测天区、曝光信息、探测器信息等,具体关键字说明参见 DataModel_,扩展的数据单元存放着原始观测图像。
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.. _DataModel: https://csst-tb.bao.ac.cn/code/csst-l1/csst-l1doc/-/blob/main/docs/source/sls/data_model.md
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CSST无缝光谱的1级数据产品是三个扩展的fits文件,扩展内容如下表所示:
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+-----------------+---------+-------------------+
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| Extension name  |  Bunit  | Comment           |
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+=================+=========+===================+
| SCI             | e-/s    | science image     |
+-----------------+---------+-------------------+
| ERR             | e-/s    | error array       |
+-----------------+---------+-------------------+
| DQ              | unitless| data quality array|
+-----------------+---------+-------------------+
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第一个扩展(SCI)的数据单元存放着仪器效应改正后的光谱图像,第二扩展(ERR)的数据单元存放着光谱图像误差,第三个扩展(DQ)的数据单元存放着光谱图像每个像素的数据质量标志位,具体参见 DQFlags_。

.. _DQFlags: https://?
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Position calibration
---------------------

`csst_ms_sls_position` package.


API
---

TODO