4 ms·
You’re being needlessly narrow minded. Any improvement on that integration that doesn’t use an absolute source of position is still dead reckoning. Do you think
by ynniv 9y ago
You’re being needlessly narrow minded. Any improvement on that integration that doesn’t use an absolute source of position is still dead reckoning. Do you think ancient sailors used IMUs?
- mveety 9y agoHe's not totally wrong here. The "IMU" you're using consists of a fix, clock, compass, and airspeed indicator (in my case). You're doing the same basic stuff that inertial guidance would do but slower and with less accuracy. And going back to the great-great-great grandparent comment, I've heard from instructors and other pilots that the 'dead' bit of the word came originally from a shortening of 'deduced'. Something like 'deduced' -> 'ded' -> 'dead' or so. I'm not totally sure of the accuracy of that etymology but it sounds plausible to me.
- mhb 9y agoWikipedia disagrees: The term "dead reckoning" was not originally used to abbreviate "deduced reckoning," nor is it a misspelling of the term "ded reckoning." https://en.wikipedia.org/wiki/Dead_reckoning https://en.wikipedia.org/wiki/Dead_reckoning
- fisherjeff 9y agoI agree that without absolute measurement, it’s still just dead reckoning. However, the article is dedicated to describing a novel source of absolute measurement.
- ynniv 9y agoDo you... know what these words mean? Absolute positioning has to be calculated from an absolute frame, like GPS. This is relative positioning, corrected by detecting periods when there should be no motion. Am I an old man now? Where is my cane? Get off my lawn!
- grzm 9y agoMaybe, but I (selfishly) believe old dogs can learn new tricks. Leaving off the first sentence of your comment would convey the same meaning while keeping any well-earned crotchetiness hidden from view.