TDOA measurements at 88200 kHz
Legend
Spectrum:
- Green: zero offset
- Red: target signal
Waterfall:
Correlation function:
- Mouse over to show the fitted result
- White (on the very left): this correlation has been used (no retuning && sufficient fitness)
- Yellow on the left: fitness function (grows to the right)
- Cyan lines: lines fitted through the reference and target transmitters
- Yellow dots: correlation peaks that were used
- Red line: gold result (if the position of the target is known)
You will find the map at the bottom of the page. (jump there)
| correlation 4220 | 2019-04-20T22-30-22_87800000_pankrac | 2019-04-20T22-30-22_87800000_brmlab |
|---|
| gain | [7, 7, 7, 1] | [6, 6, 6, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref:  tgt:  | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 22.403 stddev = 0.004 reference, 1.089 target [samples]; known correct: 24.029 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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Correlator log
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brmlab (pass 1)
reference error = 0.527383 ppm, target error = 0.041979 ppm
Measured dist: 23.502970 target fitness: 1.278830 stddevs: 6.201995 target, 0.141639 reference
gold result: 24.028855
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brmlab (pass 2)
snr: 56.4 46.5 dB
reference error = -0.004190 ppm, target error = -0.027888 ppm
Measured dist: 22.402503 target fitness: 1.280336 stddevs: 1.089490 target, 0.004469 reference
gold result: 24.028855
| correlation 4221 | 2019-04-20T22-30-22_87800000_pankrac | 2019-04-20T22-30-22_87800000_luna |
|---|
| gain | [7, 7, 7, 1] | [12, 12, 12, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 11.715 stddev = 0.017 reference, 0.500 target [samples]; known correct: 12.168 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_luna (pass 1)
reference error = 0.258751 ppm, target error = 0.075215 ppm
Measured dist: 11.872537 target fitness: 1.286556 stddevs: 3.280192 target, 0.070968 reference
gold result: 12.168451
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_luna (pass 2)
snr: 56.4 29.7 dB
reference error = 0.036851 ppm, target error = 0.027962 ppm
Measured dist: 11.715025 target fitness: 1.284731 stddevs: 0.500147 target, 0.017048 reference
gold result: 12.168451
| correlation 4222 | 2019-04-20T22-30-22_87800000_pankrac | 2019-04-20T22-30-22_87800000_brevnov |
|---|
| gain | [7, 7, 7, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -37.206 stddev = 0.005 reference, 0.638 target [samples]; known correct: -34.387 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brevnov (pass 1)
reference error = -0.021509 ppm, target error = -0.040835 ppm
Measured dist: -37.182262 target fitness: 1.327339 stddevs: 0.692788 target, 0.007155 reference
gold result: -34.387361
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 56.4 56.9 dB
reference error = 0.000131 ppm, target error = -0.042816 ppm
Measured dist: -37.205582 target fitness: 1.329561 stddevs: 0.638328 target, 0.004581 reference
gold result: -34.387361
| correlation 4223 | 2019-04-20T22-30-22_87800000_brmlab | 2019-04-20T22-30-22_87800000_luna |
|---|
| gain | [6, 6, 6, 1] | [12, 12, 12, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -10.860 stddev = 0.015 reference, 1.382 target [samples]; known correct: -11.860 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_luna (pass 1)
reference error = -0.233028 ppm, target error = 0.002257 ppm
Measured dist: -11.513651 target fitness: 1.281219 stddevs: 3.110263 target, 0.064564 reference
gold result: -11.860404
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_luna (pass 2)
snr: 47.3 29.7 dB
reference error = 0.006852 ppm, target error = 0.060869 ppm
Measured dist: -10.860394 target fitness: 1.283358 stddevs: 1.382188 target, 0.014894 reference
gold result: -11.860404
| correlation 4224 | 2019-04-20T22-30-22_87800000_brmlab | 2019-04-20T22-30-22_87800000_brevnov |
|---|
| gain | [6, 6, 6, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -59.838 stddev = 0.005 reference, 0.637 target [samples]; known correct: -58.416 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_brevnov (pass 1)
reference error = -0.536541 ppm, target error = -0.027610 ppm
Measured dist: -60.282688 target fitness: 1.322977 stddevs: 6.078249 target, 0.145151 reference
gold result: -58.416216
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 46.5 56.9 dB
reference error = -0.010136 ppm, target error = 0.047349 ppm
Measured dist: -59.837770 target fitness: 1.356897 stddevs: 0.637255 target, 0.004740 reference
gold result: -58.416216
| correlation 4225 | 2019-04-20T22-30-22_87800000_luna | 2019-04-20T22-30-22_87800000_brevnov |
|---|
| gain | [12, 12, 12, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 87800000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -49.053 stddev = 0.013 reference, 0.905 target [samples]; known correct: -46.556 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T22-30-22_87800000_luna <--> 2019-04-20T22-30-22_87800000_brevnov (pass 1)
reference error = -0.321542 ppm, target error = -0.025420 ppm
Measured dist: -48.735482 target fitness: 1.329794 stddevs: 3.520241 target, 0.087908 reference
gold result: -46.555812
2019-04-20T22-30-22_87800000_luna <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 29.7 56.9 dB
reference error = 0.007805 ppm, target error = 0.014613 ppm
Measured dist: -49.052506 target fitness: 1.345399 stddevs: 0.905104 target, 0.012530 reference
gold result: -46.555812
Map
- receivers
- real position (if known)- blue line - measurement hyperbola
- pale blue line - measurement hyperbola of measurement with high standard deviation
- red line - standard deviation error bar
