TDOA measurements at 87800 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 3872 | 2019-04-20T20-22-37_88200000_pankrac | 2019-04-20T20-22-37_88200000_brmlab |
|---|
| 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 | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -14.078 stddev = 0.006 reference, 2.519 target [samples]; known correct: -16.659 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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Correlator log
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_brmlab (pass 1)
reference error = -0.391468 ppm, target error = -0.130564 ppm
Measured dist: -13.586133 target fitness: 1.686111 stddevs: 3.361004 target, 0.106856 reference
gold result: -16.659154
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_brmlab (pass 2)
snr: 20.7 53.7 dB
reference error = 0.018132 ppm, target error = -0.045626 ppm
Measured dist: -14.077688 target fitness: 1.698815 stddevs: 2.519131 target, 0.006459 reference
gold result: -16.659154
| correlation 3873 | 2019-04-20T20-22-37_88200000_pankrac | 2019-04-20T20-22-37_88200000_luna |
|---|
| gain | [7, 7, 7, 1] | [11, 11, 11, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -23.908 stddev = 0.017 reference, 1.635 target [samples]; known correct: -24.641 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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|
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Correlator log
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_luna (pass 1)
reference error = 0.264762 ppm, target error = 0.037993 ppm
Measured dist: -24.225107 target fitness: 1.737966 stddevs: 2.340119 target, 0.074417 reference
gold result: -24.641338
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_luna (pass 2)
snr: 20.7 25.1 dB
reference error = 0.033944 ppm, target error = 0.025059 ppm
Measured dist: -23.908083 target fitness: 1.756149 stddevs: 1.634951 target, 0.017035 reference
gold result: -24.641338
| correlation 3874 | 2019-04-20T20-22-37_88200000_pankrac | 2019-04-20T20-22-37_88200000_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 | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 14.786 stddev = 0.005 reference, 2.689 target [samples]; known correct: 13.644 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_brevnov (pass 1)
reference error = -0.102369 ppm, target error = -0.046492 ppm
Measured dist: 15.316684 target fitness: 1.683988 stddevs: 2.750626 target, 0.028258 reference
gold result: 13.644093
2019-04-20T20-22-37_88200000_pankrac <--> 2019-04-20T20-22-37_88200000_brevnov (pass 2)
snr: 20.7 46.1 dB
reference error = 0.006613 ppm, target error = -0.173410 ppm
Measured dist: 14.785844 target fitness: 1.686205 stddevs: 2.689344 target, 0.004534 reference
gold result: 13.644093
| correlation 3875 | 2019-04-20T20-22-37_88200000_brmlab | 2019-04-20T20-22-37_88200000_luna |
|---|
| gain | [4, 4, 4, 1] | [11, 11, 11, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -10.616 stddev = 0.015 reference, 0.912 target [samples]; known correct: -7.982 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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|
 |
Correlator log
2019-04-20T20-22-37_88200000_brmlab <--> 2019-04-20T20-22-37_88200000_luna (pass 1)
reference error = 0.692645 ppm, target error = 0.090057 ppm
Measured dist: -10.528760 target fitness: 1.687075 stddevs: 4.307508 target, 0.191139 reference
gold result: -7.982184
2019-04-20T20-22-37_88200000_brmlab <--> 2019-04-20T20-22-37_88200000_luna (pass 2)
snr: 52.3 25.1 dB
reference error = -0.022421 ppm, target error = -0.067966 ppm
Measured dist: -10.615641 target fitness: 1.722084 stddevs: 0.912278 target, 0.015000 reference
gold result: -7.982184
| correlation 3876 | 2019-04-20T20-22-37_88200000_brmlab | 2019-04-20T20-22-37_88200000_brevnov |
|---|
| gain | [4, 4, 4, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 30.247 stddev = 0.007 reference, 0.545 target [samples]; known correct: 30.303 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
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Correlator log
2019-04-20T20-22-37_88200000_brmlab <--> 2019-04-20T20-22-37_88200000_brevnov (pass 1)
reference error = 0.263281 ppm, target error = 0.103726 ppm
Measured dist: 30.029170 target fitness: 1.721800 stddevs: 1.839225 target, 0.072317 reference
gold result: 30.303247
2019-04-20T20-22-37_88200000_brmlab <--> 2019-04-20T20-22-37_88200000_brevnov (pass 2)
snr: 53.5 46.1 dB
reference error = 0.018931 ppm, target error = -0.055513 ppm
Measured dist: 30.246970 target fitness: 1.714857 stddevs: 0.545134 target, 0.006622 reference
gold result: 30.303247
| correlation 3877 | 2019-04-20T20-22-37_88200000_luna | 2019-04-20T20-22-37_88200000_brevnov |
|---|
| gain | [11, 11, 11, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 88200000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 40.367 stddev = 0.015 reference, 0.968 target [samples]; known correct: 38.285 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
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Correlator log
2019-04-20T20-22-37_88200000_luna <--> 2019-04-20T20-22-37_88200000_brevnov (pass 1)
reference error = -0.415260 ppm, target error = -0.143619 ppm
Measured dist: 40.398798 target fitness: 1.749435 stddevs: 2.640073 target, 0.114608 reference
gold result: 38.285430
2019-04-20T20-22-37_88200000_luna <--> 2019-04-20T20-22-37_88200000_brevnov (pass 2)
snr: 25.1 46.0 dB
reference error = 0.022660 ppm, target error = -0.018833 ppm
Measured dist: 40.366861 target fitness: 1.751540 stddevs: 0.967533 target, 0.014713 reference
gold result: 38.285430
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
