Magnitude versus Mirror Angle
Roger L. Mansfield, February 23, 2006
http://www.astroger.com
This worksheet constructs a mapping of magnitude vs. mirror angle for an Iridium flare. Source of the data is the graph http://home.comcast.net/~skysat/IRID_PLOT2.htm by Randy John, author of SKYSAT [1].
Data array obtained manually by picking
points off the graph of visual magnitude versus Main Mission Antenna (MMA) mirror angle.
Assumed fitting function. The graph looks like a base 10 logarithmic function, log
Initial estimate of the fitting parameters to Mathcad 13's optimized genfit.
Invoke Mathcad 13's new genfit.
Fitting function coefficients returned by genfit.
Now plot fitting function and data points to see how good the fit looks.
The fit is snug and the Magnitude versus Mirror Angle function is
Reference
[1] John, Randy,