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

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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]

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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

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Keizo NONAKA at GHOU2007 In the year of 2006

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Keizo NONAKA at GHOU2007 Draw the picture of oscillation propagationreceiving

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Keizo NONAKA at GHOU2007 The fundamentals of radio receivers

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Keizo NONAKA at GHOU2007

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

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

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

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Keizo NONAKA at GHOU2007 The model of receiver

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Keizo NONAKA at GHOU2007

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Systems 1. Receiving 2. Pursuer 3. Frequency Analysis

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

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Keizo NONAKA at GHOU2007 Carve Calculations for the reflector

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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]

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Keizo NONAKA at GHOU2007 Pointing

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Bending

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The horn

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Keizo NONAKA at GHOU2007 Assembly

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Frequency Down Converter Frequency Down Converter

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

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

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Keizo NONAKA at GHOU2007

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

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

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

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

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

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