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NickK

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About NickK

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  1. ... repeating myself.. new post Interesting - the main issue is that steppers make it very hard to measure the current without being inline at the rate required. So the limiting driver is a good solution. What options for step movement? Well typically the 10:1 requirement for accuracy means you're only attempting to get a smooth movement but it's still not smooth and may vary in smoothness over the rotation.
  2. One of the INDI stepper drivers use it.
  3. One issue we've had with green heavy duty bags over the mount is that magpies and jackdaws seem to peck holes in it. They also become brittle over time, we're on our second. I have an inner tubular garden bag that has wire hoops , a heavy duty bin bag that guarantees water proofing and then the garden back over the top.
  4. I found yet another negative aspect - which is any PSF noise, at stacking, becomes a valid signal. I have an idea to remove the noise from the PSF (as I do with the main image) which should improve things massively. Now I'm comfortable that the processes are good - after the noise I may look to start being a bit more rigorous and optimise (possibly GPU it).
  5. So... I've been playing more.. Centre is a 3D plot of the input area.. showing the input with stars - including a saturated star (large sloped star). The output looks like it loses detail.. but it's down to scale - so the right plot shows the rebuilt saturated stars and deconvolution, the right shows an autostretched lower clipped (you can see the base of the PSF as weird circle) - simply because the full scale plots of the saturated stars really dwarf the normal signal level! So the output needs double precision! I'm currently using TIFF but I think I may need to switch to FITS! So improvements.. there is still a little noise being added by the PSF still (the little peaks near the larger stars) which is next on the hit list!
  6. The fun is that everything is still moving and it's all about having a cone of error that you're reducing iteratively - curve fitting. You can plate solve multiple locations, the time to move, sample and then plat solve needs to be built into the calculation. The reason that people pick locations on the horizon and zenith is to give the largest movement - thus, in theory, the best accuracy.
  7. Well got a good hour of clear gaps - great for push-to or binos. Andromeda through the binos
  8. Bright patch.. almost sunny!... actually - SUN \
  9. Accuweather says 1% chance of rain.. it's raining. I'd prefer 99% chance and it being clear!
  10. Awesome episode!
  11. Minor boo boo on my part - put 1x hog roast, not 2x.. normally there's plenty left over so if I could pay for the additional ticket .. otherwise Sandrine gets the hog roast!
  12. looking at the weather we should see some wind move the cloud at 11pm onwards.. but gaps rather than clears skies... but lucksall has it's own microclimate.
  13. I did manage to forget a 13A power extension.. so we have in tent power but nothing for my scope so will sort that out tomorrow.
  14. Seems warmish but it's looking decidedly cloudy (popping head out of tent).
  15. Was touch and go this morning with cold (now a cough)... but we're going to downsize as much as possible and hopefully get there at about 3 ish.