That’s been a lot of Digital Signal Processing so let us just go ahead and build our radio telecope already!
We are building a special kind of radio telescope which uses a Horn Antenna.
The Neutral Hydrogen signal from the Milky Way galaxy is very faint, and the telescope needs an amplifier that adds as little noise to the signal as possible. We have designed a low noise amplifier for you to use which will add less than 50 Kelvin noise temperature to the incoming signal. See the attached pdf for assembly instructions:
A brief memo on the initial design and performance of the LNA is here:
Use the spectrometer you designed in Lab 5
You may want to upgrade your spectrometer to use a different output than just a standard binary data file (which you’ll have to know ahead of time how to interpret).
You can use an out-of-tree module to instead save the data to an HDF5 file, which will then include additional information about what the data is, to help interpretation. Follow the instructions from the readme file at this website:
1.) Clone the repository into an appropriate folder/repository:
git clone https://github.com/WVURAIL/gr-radio_astro.git
2.) Go to the
gr-radio_astro folder/repository, create a build directory inside the repository:
cd gr-radio_astro mkdir build
3.) run cmake inside the build directory:
cd build; cmake ..
4.) run make inside build directory
5.) If no errors, install
sudo make install
Blocks should now be available in gnuradio-companion.
Additionally install h5py
sudo pip install 'h5py==2.7.0' sudo pip install pyephem
Blocks should now be available in gnuradio-companion, in the ‘radio_astro’ section.
# go to gr-radio_astro directory git pull # pull updated changes to software cd build # change working directory to build cmake .. make sudo make install
this will install the updated software