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# Signal Chain
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## Introduction
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Signal Chain (SCh) is a radar data processing library developed using [Python](www.python.org) at JRO. SCh provides modules to read, write, process and plot data.
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## Installation
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Install system dependencies, download the latest stable release from [svn](http://jro-dev.igp.gob.pe/svn/jro_soft/schain/Releases/) e.g. schainpy-2.2.5.tar.gz. and install it as a normal python package.
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```
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$ sudo apt-get install python-pip python-dev gfortran libpng-dev freetype* libblas-dev liblapack-dev libatlas-base-dev python-qt4 python-tk libssl-dev libhdf5-dev
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$ tar xvzf schainpy-2.2.5.tar.gz
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$ cd schainpy-2.2.5
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$ sudo pip install ./
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```
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**Its recommended to install schain in a virtual environment**
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```
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$ sudo pip install virtualenv
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$ virtualenv /path/to/virtual --system-site-packages
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$ source /path/to/virtual/bin/activate
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(virtual) $ cd schainpy-2.2.5
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(virtual) $ pip install ./
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```
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## First Script
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Read Spectra data (.pdata) - remove dc - plot spectra & RTI
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Import SCh and creating a project
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```python
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#!/usr/bin/python
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from schainpy.controller import Project
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controller = Project()
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controller.setup(id = '100',
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name='test',
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description='Basic experiment')
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```
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Adding read unit and operations
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```python
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read_unit = controller.addReadUnit(datatype='Spectra',
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path='/path/to/pdata/',
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startDate='2014/01/31',
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endDate='2014/03/31',
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startTime='00:00:00',
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endTime='23:59:59',
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online=0,
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walk=0)
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proc_unit = controller.addProcUnit(datatype='Spectra',
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inputId=read_unit.getId())
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op = proc_unit.addOperation(name='selectChannels')
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op.addParameter(name='channelList', value='0,1', format='intlist')
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op = proc_unit.addOperation(name='selectHeights')
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op.addParameter(name='minHei', value='80', format='float')
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op.addParameter(name='maxHei', value='200', format='float')
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op = proc_unit.addOperation(name='removeDC')
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```
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Plotting data & start project
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```python
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op = proc_unit.addOperation(name='SpectraPlot', optype='other')
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op.addParameter(name='id', value='1', format='int')
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op.addParameter(name='wintitle', value='Spectra', format='str')
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op = procUnitConfObj1.addOperation(name='RTIPlot', optype='other')
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op.addParameter(name='id', value='2', format='int')
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op.addParameter(name='wintitle', value='RTI', format='str')
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controller.start()
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```
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Full script
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```python
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#!/usr/bin/python
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from schainpy.controller import Project
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controller = Project()
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controller.setup(id = '100',
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name='test',
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description='Basic experiment')
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read_unit = controller.addReadUnit(datatype='Spectra',
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path='/path/to/pdata/',
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startDate='2014/01/31',
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endDate='2014/03/31',
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startTime='00:00:00',
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endTime='23:59:59',
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online=0,
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walk=0)
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proc_unit = controller.addProcUnit(datatype='Spectra',
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inputId=read_unit.getId())
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op = proc_unit.addOperation(name='selectChannels')
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op.addParameter(name='channelList', value='0,1', format='intlist')
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op = proc_unit.addOperation(name='selectHeights')
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op.addParameter(name='minHei', value='80', format='float')
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op.addParameter(name='maxHei', value='200', format='float')
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op = proc_unit.addOperation(name='removeDC')
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op = proc_unit.addOperation(name='SpectraPlot', optype='other')
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op.addParameter(name='id', value='6', format='int')
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op.addParameter(name='wintitle', value='Spectra', format='str')
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op = procUnitConfObj1.addOperation(name='RTIPlot', optype='other')
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op.addParameter(name='id', value='2', format='int')
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op.addParameter(name='wintitle', value='RTI', format='str')
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controller.start()
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```
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