3 ms·
True, but you could just use stars. The SR-71's celestial navigation unit could get a fix during the day while it's sitting on the ground: https://books.google
by bronson 12y ago
True, but you could just use stars. The SR-71's celestial navigation unit could get a fix during the day while it's sitting on the ground: https://books.google.com/books?id=xwPFC3GtcL8C&pg=PA132&lpg=PA132&dq=Nortronics+NAS-14V2&source=bl&ots=gjLGqSECed&sig=etODqzN_hNYyNRwhSXpQRbvovmg&hl=en&sa=X&ei=ZMQYVaDpIojroASzxIJg&ved=0CEoQ6AEwCTgK#v=onepage&q=Nortronics%20NAS-14V2&f=false https://books.google.com/books?id=xwPFC3GtcL8C&pg=PA132&lpg=...
The Nortronics NAS-14V2 was designed in the early 60s. I would love to see the insides of one of those things.
- abcd_f 12y agoClouds, fog and smoke are the obvious issues. Dense tree canopies too.
- zo1 12y agoSure, those are all obstacles. But the way I see it, they can all complement each other. I.e. One of the posters mentioned drift of accuracy for some alternate positioning methods. You could then periodically, when possible, use this more-accurate but obstacle-susceptible system to "correct" the drift.
- toomuchtodo 12y agoOne of my bucket list projects is to build a celestial navigation unit using a prosumer-grade CCD and BeagleBoard grade hardware (star maps stored on MicroSD card, computation done onboard providing NEMA output). The SR-71's celestial nav unit was a work of art. Kudos for the reference.