# Akira Computer Systems Keizo NONAKA What Students Can Learn From Making the Radio Telescope The Report from Kameoka High School.

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Akira Computer Systems Keizo NONAKA What Students Can Learn From Making the Radio Telescope The Report from Kameoka High School

Keizo NONAKA at GHOU2007 Aim Based on the activities in 2006 Making the radio telescope like making optical telescopes by students Day time usage Observing 21[cm] Emission from Hydrogen in the Milky way. Frequency = 1420.405 [MHz]

Keizo NONAKA at GHOU2007 JAHOU The Radio Curriculum Chapter I : basics Kinetic energy to receivers Chapter II : observation Equipment and observation Chapter III : Analysis Understand the meanings

Keizo NONAKA at GHOU2007 In the year of 2006

Keizo NONAKA at GHOU2007 Draw the picture of oscillation propagationreceiving

Keizo NONAKA at GHOU2007

In the year of 2007 Let us make the real radio telescope

Keizo NONAKA at GHOU2007 The Earth Science Club at Kameoka High 7 boys 17 to 18 years old

Keizo NONAKA at GHOU2007 The model of oscillator The model of oscillator

Keizo NONAKA at GHOU2007 The model of receiver

Keizo NONAKA at GHOU2007

Systems 1. Receiving 2. Pursuer 3. Frequency Analysis

Keizo NONAKA at GHOU2007 Receiving Systems Reflector Horn Receiving element Booster Frequency down converter

Keizo NONAKA at GHOU2007 Carve Calculations for the reflector

Keizo NONAKA at GHOU2007 variables Frequency 1420.40 [MHz] Diameter 2000.00 [mm] Vignetting factor 50.00 [%] f/D 0.50 Focal length 1000.00 [mm] Angular aperture 106.26 ° Gain 26.43 [dbi]

Keizo NONAKA at GHOU2007 Pointing

Bending

The horn

Keizo NONAKA at GHOU2007 Assembly

Frequency Down Converter Frequency Down Converter

Keizo NONAKA at GHOU2007 Frequency Analysis Frequency Analysis Amplitude in the frequency domain Spectrum analyzers are expensive

Keizo NONAKA at GHOU2007 Sign waves can be rewritten in the complex spin movement The Fast Fourier Transfer gives Amplitude i q

Keizo NONAKA at GHOU2007

Things to do Booster Pursuer system Inexpensive Software Defined Radio The First Light

Keizo NONAKA at GHOU2007 Investment 90,000 JPY 750 USD 660 Euro So far

Keizo NONAKA at GHOU2007 The Problems Hand craft takes time Backup theories Long term activities Finance

Keizo NONAKA at GHOU2007 What tudents an earn Feasibility based on Try and Error Technology for Science Hand craft Electronics Team work

Keizo NONAKA at GHOU2007 Special Thanks Dr. Okyudo Wakayama U. Mr. Tanaka ham operator Chevron Electronics Company

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