This Webpage Developed and Maintained by b.alex.pettit.jr.
Relatively Easy User Fabricated Antennas Yagi and Photo_Umbrella
21cm Wavelength Circular_Patch_Feed Disk Director Yagi Antenna and 3D Graphic Software PROJECT
A Beginner's Guide to Antenna Fabrication, Reception, Recording, Software Processing, and Graphic Display of the 21 cm Wavelength Microwave Electro-Magnetic Emission Spectrum from Neutral Hydrogen ( Inter-Stellar Mass ) Clouds within our Galaxy : The Milky Way
THE GOAL : For a beginner ( high school or undergrad college student ) to have everything required for an operational Astronomical H Line Radio Telescope System Project available in One Repository, and offer intriguing 3D graphics as a motivation to undertake the task !
As an Alternate to Full User Fabrication,
Consider
A High Performance, Near Off The Shelf Radio Telescope using a Kraken Discovery Feed & WiFi Dish
HARDWARE :
An Efficient Low_Noise Portable Economical 21cm Neutral Hydrogen Radio Telescope Antenna STUDENT EDITION
If built carefully to correct dimensions This antenna will have the same performance as the original
It is light enough to be mounted on a very low cost photo tripod
The intent of this Project is to provide directions to
fabricate a Student level 21cm Hydrogen Line
Radio Telescope able to be fully constructed with hand tools.
This antenna has excellent performance.
SOFTWARE :
Jamison Adcock wrote the initial Java Software to Process
AirSpy SDR# Studio & Daniel Kaminski IF_Avg *.txt files
which incorporated the Matlab Code I developed :
Correcting the Spectra for Frame to Frame Background Drift ,
Single Point and now mX + b Linear Slope Correction,
Normalizing the Spectra to Cold Sky,
Converting the Spectra to a logarithmic dB Scale
Processing the Spectra files into *.csv Formats compatible with
Fumihiro Matsui Rinearn 2D and 2D Graphics packages
Output : Raw Data 2D/3D CSV, Frame to Frame Drift 2D CSV , 1pt & mx+b Drift Corrected and Normalized 2D/3D CSV : all Rinearn compatible
Best Regards, Alex Pettit
PLEASE NOTE : the Antenna can be used with Any Software | the Software can be used with Any Antenna
A Referece Hydrogen Line Distribution Chart
Courtesy : Canadian Centre for Experimental Radio Astronomy
To DOWNLOAD a File to your PC, Select a File & Press the small Download Icon
Link to H Line 3D Video https://www.youtube.com/watch?v=g5uV6zI_978
Review by Carl Laufer ( thanks Carl )