The way I read it, the bug is something like this:<p>There are three components, one is a Controller which goes out into the world and calculates how we&#x27;re oriented, the second is basically just a Model in the MVC sense (the IRU). The first Controller has a responsibility to update the Model with whatever it finds out.<p>The third component is a separate part of the IRU which is essentially both a view on the model (where am I pointed, where am I supposed to be pointed?) combined with a controller which fires some thrusters to try to point you in the right direction.<p>The problem was that the first component wasn&#x27;t updating the model. Therefore the second component set &quot;fireThruster1: true,&quot; but then never got any information that it was approaching the right direction -- therefore kept that variable set.<p>The thruster continuously fired, spinning the satellite around and around until it was ripped apart by centrifugal forces.