处理HHT光谱数据

下面跟着教程，完成处理一个光谱数据。

The Heinrich Hertz Telescope on Mt. Graham is a 10-meter dish of 15 micron surface accuracy, optimized for studying the Universe at submillimeter wavelengths (between 0.3-1.4 mm, or 200-900 GHz). 

file in filename

find

get first

plot

得到一个光谱图，头信息header:

• The information from list: observation number, object name, telescope/spectrometer, offsets
• Date, RA, DEC
• tau: opacity of the atmosphere at the sky frequency
• Tsys: System noise temperature
• Time: On-source integration time, in minutes
• El: Elevation of source
• Dv: Velocity resolution per pixel

频谱中可能有一些东西，但是这仅需2分钟即可完成源上集成时间。我们需要添加其他框架：