Using (approximately!) known satellite positions to help verify absolute camera timing when satellite(s) are in field-of-view (FOV).

• RunIridium91Apr11: plot where satellites exist vs. time on x,y pixel map
• RunSatCrossTime: plot when satellite crossed expected pixel (for fine absolute timing verification)
• PlotIridiumTLE: Compare high accuracy Iridium position data with TLE and Optical data

I would be happy to discuss your specific needs.

You will need to request the high accuracy Iridium data for your data from the JHU APL AMPERE team. You will also need the TLE data available from AGI. This file is sort of purpose-specific for now, but can be modified to better fit your needs.

1. Using TLE and SGP4 propagator, get az/el for satellite from an observer vs. time
2. Load video frames from the selected times.
3. Pick a pixel to plot w.r.t. time. Variable "satpix" is an Nx2 matrix of x,y pixel coordinates, and N is the number of time steps.
4. You will get a 1-D plot of intensity vs. time for that pixel. Did the satellite pixel-crossing correspond to the maximum intensity? If not, there is a timing error that you can quantify by how far in time the maximum intensity was from the TLE/SGP4 prediction.

This code was a quick one-off, if you are actually interested in this let's talk and fix the codebase.