## Photon information

- number of photons, positions, & arrival times Ö depend on pulse shape, gain, clocks & cables. Error in hit time Parameter Error @50 m
- Distance error: 40 m --> 50 m 83 nsec
- Counting error: 1pe --> 2pe 100 nsec 10pe --> 100pe 21 nsec 100 pe --> 1000pe 7 nsec
- Scattering length: 20m --> 26 m 45 nsec
- Orientation: 0 deg --> 90 deg 30 nsec
- Need to understand how hit time errors propagate to tracks.
- Need to understand flux uncertainty, energy resolution, etc.

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