3 ms·

Thanks for posting, I really enjoy these "first cracks" at mainstream technology. And to think they had this as a working prototype almost 35 years ago (albeit

Thanks for posting, I really enjoy these "first cracks" at mainstream technology. And to think they had this as a working prototype almost 35 years ago (albeit via dead reckoning and not satellite as ashleyn pointed out).

mhh__ 6y ago
You should see the MFDs on the original F/A-18. In 1983 they still had a fully digital display, far more data than anything from Star Wars
londons_explore 6y ago
There is no real disadvantage to dead reckoning as long as the system is always powered up. The system just needs to know it's start location (the car factory) and can correct any errors in dead reckoning using the compass and maps. GPS is so cheap now that there is no reason not to use it, but a system built with dead reckoning today would work just fine.
- MrRadar 6y ago
  > There is no real disadvantage to dead reckoning as long as the system is always powered up. With dead reckoning the error accumulates over time. Because GPS provides absolute positioning it does not have that problem.
  - londons_explore 6y ago
    Not if your system is installed in a car which normally travels on roads... A simple Particle Filter conditioned on "90% chance the car is on a road or other drivable space" will robustly get rid of any error accumulation, leaving you a position estimate that may even typically be more accurate than GPS.
    - dmlachap 6y ago
      I'm inclined to agree, but that requires your map to be consistently up-to-date, which may not always be practical.