local anita group meeting stephen hoover 25 june 2009
TRANSCRIPT
![Page 1: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/1.jpg)
Local ANITA Group Meeting
Stephen Hoover
25 June 2009
![Page 2: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/2.jpg)
Veto Antennas
![Page 3: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/3.jpg)
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?
![Page 4: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/4.jpg)
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
![Page 5: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/5.jpg)
Non-RF trigger 13,160 7,921
Marked sync slip 953 482
Cal pulser time 398 35
“Payload blast” 937 112
SURF Saturation 972 2
Veto antenna Vpkpk large 732 28
Short waveform 125 120
Tiny Vpkpk 573 271
Seavey RFCM off 400 0
Veto RFCM off 708 303
LDB trigger time 6,291 1,143
TD trigger time 158 158
# failing# failing, if this cut were the last
Total events cut in 10%: 17,085 events of 778,725 (2.2%)
![Page 6: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/6.jpg)
Reconstructed Signal Directions:v-pol Noise (payload coordinates)
Direction of maximum cross-correlation in payload coordinates10% data, noise sample (but allowing events which trigger the adaptive filter)
![Page 7: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/7.jpg)
Direction of maximum cross-correlation in external coordinates10% data, noise sample (but allowing events which trigger the adaptive filter)
Reconstructed Signal Directions:v-pol Noise (external coordinates)
![Page 8: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/8.jpg)
Reconstructed Signal Directions:v-pol Noise (external coordinates)
Direction of maximum cross-correlation in external coordinates10% data, no satellite filter noise sample (but allowing events which trigger the adaptive filter)
![Page 9: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/9.jpg)
Reconstructed Signal Directions:
Simulated Noise (payload coordinates)
![Page 10: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/10.jpg)
Reconstructed Signal Directions:Simulated Signal (payload coordinates)
Range of SNRs, thrown flat in azimuth, flat in elevation from 5 to -20
![Page 11: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/11.jpg)
Ratio of Peaks
2nd / 1st
![Page 12: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/12.jpg)
Ratio of Peaks
3rd / 1st
![Page 13: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/13.jpg)
(Simulated) Ratio of Peaks by SNRSignals reconstructing in the correct direction
![Page 14: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/14.jpg)
(Simulated) Ratio of Peaks by SNRSignals reconstructing in the correct direction
and with a (simulated) hardware trigger
![Page 15: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/15.jpg)
(Simulated) Ratio of Peaks by SNRSignals reconstructing in the wrong direction,
but with high rotated cross-correlation
![Page 16: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/16.jpg)
Simulated Signal: Misreconstructions
![Page 17: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/17.jpg)
Efficiencies on simulation
PointingEfficiency
(Simulated)HW triggerefficiency
SNR of misreconstructed signals
![Page 18: Local ANITA Group Meeting Stephen Hoover 25 June 2009](https://reader035.vdocument.in/reader035/viewer/2022062407/56649d0a5503460f949ddcba/html5/thumbnails/18.jpg)
Other cuts vs SNR(Simulated events with correct pointing)