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Status of OnboardFilter

Status of OnboardFilter. Using release v9r9 OnboardFilter v4r0p2 Only wrapper code (OnboardFilter.cxx is in src now) Filter code is now an external package (work done by Tracy, Navid, Toby, etc) Package is called “obf”

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Status of OnboardFilter

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  1. Status of OnboardFilter • Using release v9r9 • OnboardFilter v4r0p2 • Only wrapper code (OnboardFilter.cxx is in src now) • Filter code is now an external package (work done by Tracy, Navid, Toby, etc) • Package is called “obf” • Has all of the libraries, including libraries which are loaded at run time: • Pedestals, calibs, geometry, etc • Detailed comparisons to previous releases still in progress…

  2. Addition of “BestTrack” to OnboardFilter • OnboardFilter algorithm computes 2D projections: filter vetoes are based only on these, not on 3D combination • Onboard Science (grb identification) needs 3D tracks: • Loop over XZ and YZ projections • Require projections start in the same layer • “BestTrack” defined to be that 3D combination with the largest number of total hits

  3. Comparison of ground tracks to “BestTrack” • Loop over ground tracks • Find the track closest in XZ slope to the BestTrack • Plot the difference in XZ/YZ slopes

  4. Comparison to MC • Using a sample of photons from GRBs • Plot difference in XZ slope of MC gamma and • bestTrack (lower plot) • Ground track (upper plot: using the ground track closest to the bestTrack)

  5. Comparison to MC • Using a sample of photons from GRBs • Plot difference in YZ slope of MC gamma and • bestTrack (lower plot) • Ground track (upper plot: using the ground track closest to the bestTrack)

  6. Plans • BestTrack algorithm is already being tested with Onboard science GRB identification/localization • Need to update CVS with BestTrack code modifications to OnbaordFilter.cxx • Add results of bestrack to Merit?

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