The apollo guidance system was one of the first production deployments of Kalman filters. Here's the source code: https://github.com/chrislgarry/Apollo-11/blob

The apollo guidance system was one of the first production deployments of Kalman filters. Here's the source code: https://github.com/chrislgarry/Apollo-11/blob/master/Luminary099/KALMAN_FILTER.agc https://github.com/chrislgarry/Apollo-11/blob/master/Luminar... (it was used for star navigation, not sure about the lander).