[ubertakter]

Two bug stories of limited usefulness:

Worked on a tool that used 3D trajectories in an analysis. Some of the output looked strange, but not exactly incorrect (there was no obviously correct answer). Looking at the trajectories used in the analysis, we started thinking some of them had to be wrong. We isolated the "most" incorrect ones and dug in to the code. After looking at the x, y, z components, that pointed us to a few functions. We found a function call with a typo. Instead of f(x,y,z) it was called with f(x,y,y). That one took a day or two to figure out.

Working on a tool that plotted satellite trajectories as part of results visualization, there was a strange jump in the orbit plot. Orbits before and after were fine. We eventually narrowed down the jump to crossing a specific date and time, and not at an obvious boundary (some day in the middle of the year if I remember correctly). There was no obvious reason for it to occur (no errors in our calculations or the input data). Eventually, we discovered that a leap second had been added on that date. The libraries we were relying on did not include that leap second since it had only been added recently, but the input data did. That was... frustrating. If I recall correctly, leap seconds are no longer added to time information (thankfully).