Millepede-II set-up

[ryuwd]

Set up mille binary file output for input to ./pede application, supplying the required info from an art module.
Millepede-II will be given the straight track trajectory kalman fit result for straight cosmics

• Set up unique labelling of plane degrees of freedom
• Error on the residual measurement - comes from Kalman fit result - radialErr()
• Move to new track parameterisation - Straight track Kalman fit
• Residual derivatives wrt kalman track parameters (https://arxiv.org/pdf/0810.2241.pdf)
• Appropriate choice of constraints to suppress weak degrees of freedom
• Use unbiased residual calculations from BTrk using 'inverse kalman filter step'

[ryuwd]

Need Kalman Fit of straight cosmic track, and the form of the residual derivatives. Then it will be possible to start running Millepede.

[ryuwd]

Can start running Millepede now to test with biased residuals and partial derivatives (analytically calculated).

Start thinking about writing a steering and constraints file for plane alignment.

[ryuwd]

Steering file format pretty easy to understand.

Cfiles
<path to binary Mille file> ! comment is denoted by exclamation mark
<path to binary Mille file> ! another file

Constraints ! sets constraints
<constraint settings go here>

method inversion 5 0.1 ! tells pede what solving method to use

The above listing is an example, and the final steering file would probably need more settings applied.
Can set up an alignment combining multiple bin files generated by PlaneAlignment module (containing track residual + derivative data).

Can set up equality constraints between global parameters to 'eliminate' weak degrees of freedom.

I'd first like to try gathering a sample of 10,000+ cosmic tracks to see how ./pede handles them. Currently have amassed about 300 for tests but I don't think this is close to enough, and ./pede doesn't seem to like it.