How a Kalman filter works, in pictures - https://news.ycombinator.com/item?id=23943836 - July 2020 (27 comments)
Corona virus spread prediction using kalman filter - https://news.ycombinator.com/item?id=22578235 - March 2020 (2 comments)
Kalman Filter Simulation - https://news.ycombinator.com/item?id=21709534 - Dec 2019 (1 comment)
Derive Yourself a Kalman Filter - https://news.ycombinator.com/item?id=19894776 - May 2019 (55 comments)
How a Kalman filter works, in pictures (2015) - https://news.ycombinator.com/item?id=17116149 - May 2018 (34 comments)
Reduce GPS data error on Android with Kalman filter and accelerometer - https://news.ycombinator.com/item?id=16627111 - March 2018 (30 comments)
Quick explanation of how a Kalman filter works - https://news.ycombinator.com/item?id=16575679 - March 2018 (76 comments)
Unscented Kalman Filter (UKF) C Library - https://news.ycombinator.com/item?id=15986880 - Dec 2017 (2 comments)
How a Kalman filter works, in pictures (2015) - https://news.ycombinator.com/item?id=13449229 - Jan 2017 (32 comments)
How a Kalman filter works, in pictures - https://news.ycombinator.com/item?id=12648724 - Oct 2016 (1 comment)
Kalman Filter via a Simple and Intuitive Derivation [pdf] - https://news.ycombinator.com/item?id=12648035 - Oct 2016 (24 comments)
The magic of the Kalman filter, in pictures - https://news.ycombinator.com/item?id=10042050 - Aug 2015 (48 comments)
Kalman Filter Simulator - https://news.ycombinator.com/item?id=7878474 - June 2014 (1 comment)
SideCar's Kalman Filter models San Francisco brunch - https://news.ycombinator.com/item?id=7349419 - March 2014 (14 comments)
How to build an Anti Aircraft Missile: Bayes’ Theorem and the Kalman Filter - https://news.ycombinator.com/item?id=6657301 - Nov 2013 (15 comments)
Using A Kalman Filter To Make Sense Of Noisy Data - https://news.ycombinator.com/item?id=3950510 - May 2012 (18 comments)
Poor Man's Explanation of Kalman Filtering [pdf] - https://news.ycombinator.com/item?id=1362597 - May 2010 (11 comments)
Others?