algorithm.rst 3.34 KB
Newer Older
BO ZHANG's avatar
tweaks    
BO ZHANG committed
1
2
SLS pipeline
============
BO ZHANG's avatar
BO ZHANG committed
3
4
5
6
7


Instrument correction
---------------------

Wang Xia's avatar
Wang Xia committed
8
9
概述
``````````````````
Wang Xia's avatar
Wang Xia committed
10
`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块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:
Wang Xia's avatar
Wang Xia committed
11

Wang Xia's avatar
Wang Xia committed
12
13
14
    - 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
Wang Xia's avatar
Wang Xia committed
15
`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_。
Wang Xia's avatar
Wang Xia committed
16

Wang Xia's avatar
Wang Xia committed
17
.. _code: https://csst-tb.bao.ac.cn/code/csst-l1/sls/csst_ms_sls_instrument
Wang Xia's avatar
Wang Xia committed
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Input
``````````````````
`csst_ms_sls_instrument` 将从csst_common.CsstMsDataManager获取0级数据和参考文件。
0级数据是包含一个扩展的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。
参考文件列表如下,第一列是参考文件类型,第二列是文件说明,第三列是数据产品中记录文件名的关键字:

+-----------------+----------------------------+-----------------+
| Reference file  | Description                | Keyword         |
+=================+============================+=================+
| Gain map        | gain array(9k×9k)          | R_GAIN          |
+-----------------+----------------------------+-----------------+
| Superbias       | superbias file(9k×9k)      | R_BIAS          |
+-----------------+----------------------------+-----------------+
| Superdark       | superdark file(9k×9k)      | R_DARK          |
+-----------------+----------------------------+-----------------+
| Superflat       | super flatfield file(9k×9k)| R_DFLAT         |
+-----------------+----------------------------+-----------------+
| Badpixel table  | Bad/hot Pixel table or map | R_MASK          |
+-----------------+----------------------------+-----------------+

.. _DataModel: https://csst-tb.bao.ac.cn/code/csst-l1/csst-l1doc/-/blob/main/docs/source/sls/data_model.md
BO ZHANG's avatar
BO ZHANG committed
39

Wang Xia's avatar
Wang Xia committed
40
41
数据产品
``````````````````
Wang Xia's avatar
Wang Xia committed
42
`csst_ms_sls_instrument` 生成的数据产品是包含三个扩展的fits文件,扩展内容如下表所示:
Wang Xia's avatar
Wang Xia committed
43

Wang Xia's avatar
Wang Xia committed
44
45
46
+-----------------+---------+-------------------+
| Extension name  |  Bunit  | Comment           |
+=================+=========+===================+
Wang Xia's avatar
Wang Xia committed
47
| SCI             | e-/s    | Science image     |
Wang Xia's avatar
Wang Xia committed
48
+-----------------+---------+-------------------+
Wang Xia's avatar
Wang Xia committed
49
| ERR             | e-/s    | Error array       |
Wang Xia's avatar
Wang Xia committed
50
+-----------------+---------+-------------------+
Wang Xia's avatar
Wang Xia committed
51
| DQ              | unitless| Data quality array|
Wang Xia's avatar
Wang Xia committed
52
+-----------------+---------+-------------------+
Wang Xia's avatar
Wang Xia committed
53

Wang Xia's avatar
Wang Xia committed
54
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_。仪器效应改正过程中,同时会记录下处理时间、状态信息等关键字,具体参见 DataModel_。
Wang Xia's avatar
Wang Xia committed
55

Wang Xia's avatar
Wang Xia committed
56
.. _DQFlags: https://?
Wang Xia's avatar
Wang Xia committed
57

Wang Xia's avatar
Wang Xia committed
58

Wang Xia's avatar
Wang Xia committed
59

Wang Xia's avatar
Wang Xia committed
60

BO ZHANG's avatar
BO ZHANG committed
61
62
63
64
65
66
67
68
69
70
Position calibration
---------------------

`csst_ms_sls_position` package.


API
---

TODO