3 ms·
Astro-know-nothing question: why wouldn't it be more directly 'tracking' to forget the constant clock drive (which we know will always be off by some amount) a
by theophrastus 12y ago
Astro-know-nothing question: why wouldn't it be more directly 'tracking' to forget the constant clock drive (which we know will always be off by some amount) and set up a suitably long sight tube on some bright star with a photo sensor at the bottom of it. When the star's light moves out of the tube, a fine-stepped stepper tracks west until it re-appears ..?
- lutorm 12y agoThat's how automatic guiders work, but they only provide extra signal above and beyond the normal tracking rate. Rather than pulsing on and off completely, you want to start with something you know is almost right and then just provide small perturbations on top of it.