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| Are accurate clocks really the limiting factor in cheap Inertial Navigation? |
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| hamster_nz:
((( quietly hoping somebody else posts a link to today's XKCD, that I just read and LOL to ))) |
| soldar:
--- Quote from: tomato on March 27, 2019, 04:57:37 am ---I suspect some of you would have ridiculed the GPS system when it was proposed, since we already had a perfectly good navigation system (LORAN) in place. --- End quote --- I am not sure if you are serious or what point you might be trying to make but (1) the capabilities of satelite navigation compared to LORAN are immensely greater. Satnav systems were first developed for missiles, submarines and surface naval ships in circumstances where LORAN could not be used. (2) GPS did not replace LORAN but earlier satnav Transit and (3) satnav has proven useful enough that Russia, China and the EU have all developed their own satnav systems. |
| RoGeorge:
Indeed, the GPS system is very important because it answers the first 2 most important human questions: 1. Where am I? 2. What time is it? Ufortunatly, it doesn't answer the 3'rd one: 3. WTF, am I doing here? :-DD |
| coppice:
--- Quote from: soldar on March 27, 2019, 12:22:56 pm --- --- Quote from: tomato on March 27, 2019, 04:57:37 am ---I suspect some of you would have ridiculed the GPS system when it was proposed, since we already had a perfectly good navigation system (LORAN) in place. --- End quote --- I am not sure if you are serious or what point you might be trying to make but (1) the capabilities of satelite navigation compared to LORAN are immensely greater. Satnav systems were first developed for missiles, submarines and surface naval ships in circumstances where LORAN could not be used. (2) GPS did not replace LORAN but earlier satnav Transit and (3) satnav has proven useful enough that Russia, China and the EU have all developed their own satnav systems. --- End quote --- This is post hoc reasoning. When GPS was being developed the receivers looked so large, heavy, complex and expensive it was far from obvious that it would ever be really compact and cheap. Most people assumed Loran, Decca and other existing systems would have a long life serving people who couldn't live with the drawbacks of GPS. However, just as GSM was developed to be a car telephone system until around 2000, yet resulted in light handhelds in the early 1990s, GPS moved far quicker than most people expected. |
| rs20:
--- Quote from: hamster_nz on March 27, 2019, 09:03:55 am ---1921 FACT CHECKER --- End quote --- |
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