Open House #2 - SDD
Theme: RFI/Quiet Zone
Telescope control, tracking, computing power and telescope mounts
A demonstration of signals, astro-chemistry and RFI with audio equivalents
- Intro - who am I
- How does a signal look in a computer
- Waves to voltages to numbers
- Show sine plot
- Show frequency display and discuss harmonics
- What do astronomers 'listen' to?
- Nothing, the computers do the listening; but what are they listening to?
- Star 'notes'; more precisely the symphony of chemical spectrums
- Show how notes signatures appear the same, but shifted
- Show how changing the instrument changes the signature
- Relate the signature to the fingerprints of various elements
- Also show how understanding where the fingerprints are, relative to where they should be gives us information about relative motion of stars and galaxies.
- Noisy signals and noise generators
- Show a sine wave, then show a square wave
- Point out the increase in harmonics
- Point out that computers, cameras, anything digital is full of square-waves - that is why we are concerned about RFI
- point out the shielded room.
Demonstration of the size of our Galaxy at various 'warp' speeds.
- Intro -
- Computers are fun, since they allow us to simulate things we can't actually do.
- Star Trek and the Warp Number - speed = Warp^3 * speed of light
- show demo
- 25 Oct 2008