4 ms·
A typical sub drifts by only a few tens of meters per day - obviously this builds up . The point of the BEC gravity map is to reduce this inaccuracy an order of
by jchallis 3y ago
A typical sub drifts by only a few tens of meters per day - obviously this builds up . The point of the BEC gravity map is to reduce this inaccuracy an order of magnitude, thereby extending the subsurface range of the subs.
- rogers18445 3y agoBut how would you do this? Sensor fusion with inertial sensors is well understood, how do you fuse g into the equation to improve things?
- themeiguoren 3y agoBy having a base map of the gravity of the ocean floor. Picture a contour map, but for values of g. Same as if you were navigating based on a physical contour map of the ocean floor, except that getting an accurate depth like that in deep waters isn’t possible, and in shallow waters requires sonar.