Dudley Johnson - Presentation of Noise Effects in Astronomical processes Synopsis

Noise is prevalent in many electronic, electrical, mechanical, acoustic and optical systems, including animal sight. Noise can therefore significantly affect the performance of astronomical equipment. The presentation introduces some of the processes affected by noise and considers factors that can improve performance. A series of audio clips demonstrate the effects of filtering signals and noise and how it might be applied to other processes. Graphical examples are also presented to assist with explaining the concepts of filtering, signal to noise ratio and dynamic range. As an example of vibration affecting mounts simple mitigation effects are discussed with the aid of illustrations. A brief account of noise effects upon visual observations and film imaging are included however a more detailed account of noise effects upon the digital camera are presented

Dudley has been member of Vas for many years, and work as an engineer. He specialises in radio astronomy.

The Vectis Astronomical Society meets on the 4th Friday of every month, except for December. This event is open for non-members to attend. The speakers come from all over the country and give a presentation for around 45 mins. We then stop for a break with tea and biscuits, which gives an opportunity to mingle and chat. The second half of the evening one of our regular members will give a short 20min ‘what’s in the sky this month’ presentation.

We have a suggested donation of £2.50 for Non Members of Vas.