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Local ANITA Group Meeting

Local ANITA Group Meeting. Stephen Hoover 25 June 2009. Veto Antennas. Veto Antenna Cut. Final cut: Remove events with veto Vpkpk > 235 mV + 0.5 * Seavey Vpkpk and veto Vpkpk > 1.1 * Seavey Vpkpk This removes 28 events (in 10% data) 5 cal pulser 5 payload blast 3 probably on-payload

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Local ANITA Group Meeting

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  1. Local ANITA Group Meeting Stephen Hoover 25 June 2009

  2. Veto Antennas

  3. Veto Antenna Cut • Final cut: • Remove events with • veto Vpkpk > 235 mV + 0.5 * Seavey Vpkpk • and veto Vpkpk > 1.1 * Seavey Vpkpk • This removes 28 events (in 10% data) • 5 cal pulser • 5 payload blast • 3 probably on-payload • 3 loud CW from South Pole • 5 ambiguous & messy, possibly off-payload • 7 probably off-payload – aliased 150 MHz?

  4. Final Event Quality Cuts • Remove events which have • Trigger type other than RF • Hardware-marked sync slip (otherflag2) • Trigger time between 40 and 150 ns (cal pulser) • Have 12 or more upper ring antennas with Vpkpk > 250 mV in v-pol or h-pol • Have SURF saturation • Veto antenna Vpkpk too large compared to Seavey Vpkpk • Have fewer than 240 points in a waveform • Have Vpkpk abnormally small (RFCMs off) • Seavey RFCM relay marked off in header • Veto RFCM relay marked off in header • Trigger time is within 600 ns of an LDB ground pulser • Trigger time is consistent with a Taylor Dome signal

  5. # failing, if this cut were the last # failing Total events cut in 10%: 17,085 events of 778,725 (2.2%)

  6. Reconstructed Signal Directions:v-pol Noise (payload coordinates) Direction of maximum cross-correlation in payload coordinates 10% data, noise sample (but allowing events which trigger the adaptive filter)

  7. Reconstructed Signal Directions:v-pol Noise (external coordinates) Direction of maximum cross-correlation in external coordinates 10% data, noise sample (but allowing events which trigger the adaptive filter)

  8. Reconstructed Signal Directions:v-pol Noise (external coordinates) Direction of maximum cross-correlation in external coordinates 10% data, no satellite filter noise sample (but allowing events which trigger the adaptive filter)

  9. Reconstructed Signal Directions:Simulated Noise (payload coordinates)

  10. Reconstructed Signal Directions:Simulated Signal (payload coordinates) Range of SNRs, thrown flat in azimuth, flat in elevation from 5 to -20

  11. Ratio of Peaks2nd / 1st

  12. Ratio of Peaks3rd / 1st

  13. (Simulated) Ratio of Peaks by SNRSignals reconstructing in the correct direction

  14. (Simulated) Ratio of Peaks by SNRSignals reconstructing in the correct directionand with a (simulated) hardware trigger

  15. (Simulated) Ratio of Peaks by SNRSignals reconstructing in the wrong direction, but with high rotated cross-correlation

  16. Simulated Signal: Misreconstructions

  17. Efficiencies on simulation (Simulated) HW trigger efficiency SNR of misreconstructed signals Pointing Efficiency

  18. Other cuts vs SNR(Simulated events with correct pointing)

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