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. Non-RF trigger13,1607,921 Marked sync slip953482 Cal pulser time39835 “Payload blast”937112 SURF Saturation9722 Veto antenna Vpkpk large73228 Short waveform125120 Tiny Vpkpk573271 Seavey RFCM off4000 Veto RFCM off708303 LDB trigger time6,2911,143 TD trigger time158 # failing # failing, if this cut were the last 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. Direction of maximum cross-correlation in external coordinates 10% data, noise sample (but allowing events which trigger the adaptive filter) Reconstructed Signal Directions: v-pol Noise (external coordinates)

8. 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 Peaks 2 nd / 1 st

12. Ratio of Peaks 3 rd / 1 st

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

14. (Simulated) Ratio of Peaks by SNR Signals reconstructing in the correct direction and with a (simulated) hardware trigger

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

16. Simulated Signal: Misreconstructions

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

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