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 4214 | 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 | -9.502 stddev = 0.004 reference, 3.118 target [samples]; known correct: -16.659 |
| 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 = -0.034433 ppm
Measured dist: -12.513223 target fitness: 1.840630 stddevs: 4.665644 target, 0.141639 reference
gold result: -16.659154
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brmlab (pass 2)
snr: 20.1 55.9 dB
reference error = -0.004190 ppm, target error = 0.095780 ppm
Measured dist: -9.502175 target fitness: 1.838351 stddevs: 3.117995 target, 0.004469 reference
gold result: -16.659154
| correlation 4215 | 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 | -22.533 stddev = 0.017 reference, 2.168 target [samples]; known correct: -24.641 |
| 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_luna (pass 1)
reference error = 0.258751 ppm, target error = -0.098768 ppm
Measured dist: -22.076168 target fitness: 1.924062 stddevs: 2.780514 target, 0.070968 reference
gold result: -24.641338
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_luna (pass 2)
snr: 20.0 22.6 dB
reference error = 0.036851 ppm, target error = -0.125164 ppm
Measured dist: -22.533301 target fitness: 1.924603 stddevs: 2.168353 target, 0.017048 reference
gold result: -24.641338
| correlation 4216 | 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 | 19.268 stddev = 0.005 reference, 3.152 target [samples]; known correct: 13.644 |
| 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 = 0.017762 ppm
Measured dist: 19.212852 target fitness: 1.825487 stddevs: 3.177904 target, 0.007155 reference
gold result: 13.644093
2019-04-20T22-30-22_87800000_pankrac <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 20.0 43.2 dB
reference error = 0.000131 ppm, target error = 0.004817 ppm
Measured dist: 19.268452 target fitness: 1.825608 stddevs: 3.152228 target, 0.004581 reference
gold result: 13.644093
| correlation 4217 | 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 | -10.983 stddev = 0.015 reference, 0.946 target [samples]; known correct: -7.982 |
| 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 = -0.007222 ppm
Measured dist: -10.551966 target fitness: 1.874396 stddevs: 1.852892 target, 0.064564 reference
gold result: -7.982184
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_luna (pass 2)
snr: 56.7 22.6 dB
reference error = 0.006852 ppm, target error = 0.129619 ppm
Measured dist: -10.983021 target fitness: 1.865878 stddevs: 0.946379 target, 0.014894 reference
gold result: -7.982184
| correlation 4218 | 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 | 29.761 stddev = 0.005 reference, 0.804 target [samples]; known correct: 30.303 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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|
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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 = -0.111113 ppm
Measured dist: 33.554986 target fitness: 1.824802 stddevs: 3.941181 target, 0.145151 reference
gold result: 30.303247
2019-04-20T22-30-22_87800000_brmlab <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 55.9 43.2 dB
reference error = -0.010136 ppm, target error = -0.026505 ppm
Measured dist: 29.760810 target fitness: 1.831200 stddevs: 0.803528 target, 0.004740 reference
gold result: 30.303247
| correlation 4219 | 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 | 40.761 stddev = 0.013 reference, 1.072 target [samples]; known correct: 38.285 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
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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 = -0.122294 ppm
Measured dist: 40.069568 target fitness: 1.904602 stddevs: 2.412563 target, 0.087908 reference
gold result: 38.285430
2019-04-20T22-30-22_87800000_luna <--> 2019-04-20T22-30-22_87800000_brevnov (pass 2)
snr: 22.6 43.2 dB
reference error = 0.007805 ppm, target error = -0.091619 ppm
Measured dist: 40.760573 target fitness: 1.911594 stddevs: 1.072108 target, 0.012530 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
