TDOA measurements at 91900 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 3938 | 2019-04-20T20-43-12_91900000_pankrac | 2019-04-20T20-43-12_91900000_luna |
|---|
| gain | [7, 7, 7, 1] | [9, 9, 9, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref:  tgt:  | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 10.337 stddev = 0.014 reference, 0.832 target [samples]; known correct: 17.803 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
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Correlator log
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_luna (pass 1)
reference error = 0.276862 ppm, target error = -0.034909 ppm
Measured dist: 12.937678 target fitness: 1.130527 stddevs: 3.712344 target, 0.074292 reference
gold result: 17.802583
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_luna (pass 2)
snr: 41.9 37.5 dB
reference error = 0.023087 ppm, target error = -0.028942 ppm
Measured dist: 10.336653 target fitness: 1.131870 stddevs: 0.832202 target, 0.013561 reference
gold result: 17.802583
| correlation 3939 | 2019-04-20T20-43-12_91900000_pankrac | 2019-04-20T20-43-12_91900000_brmlab |
|---|
| gain | [7, 7, 7, 1] | [3, 3, 3, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref:  tgt:  |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 21.355 stddev = 0.004 reference, 0.449 target [samples]; known correct: 29.106 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
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Correlator log
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_brmlab (pass 1)
reference error = 0.528272 ppm, target error = -0.005097 ppm
Measured dist: 14.380965 target fitness: 1.138824 stddevs: 14.691497 target, 0.144709 reference
gold result: 29.106471
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_brmlab (pass 2)
snr: 41.9 45.7 dB
reference error = 0.001501 ppm, target error = -0.011149 ppm
Measured dist: 21.355239 target fitness: 1.137768 stddevs: 0.448698 target, 0.004451 reference
gold result: 29.106471
| correlation 3940 | 2019-04-20T20-43-12_91900000_pankrac | 2019-04-20T20-43-12_91900000_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 | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -41.104 stddev = 0.004 reference, 1.328 target [samples]; known correct: -37.247 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_brevnov (pass 1)
reference error = -0.082645 ppm, target error = 0.022043 ppm
Measured dist: -41.193213 target fitness: 1.135165 stddevs: 1.815321 target, 0.022813 reference
gold result: -37.247119
2019-04-20T20-43-12_91900000_pankrac <--> 2019-04-20T20-43-12_91900000_brevnov (pass 2)
snr: 41.9 47.4 dB
reference error = 0.001604 ppm, target error = 0.049766 ppm
Measured dist: -41.103631 target fitness: 1.134619 stddevs: 1.327980 target, 0.003870 reference
gold result: -37.247119
| correlation 3941 | 2019-04-20T20-43-12_91900000_luna | 2019-04-20T20-43-12_91900000_brmlab |
|---|
| gain | [9, 9, 9, 1] | [3, 3, 3, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | 10.960 stddev = 0.013 reference, 0.697 target [samples]; known correct: 11.304 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T20-43-12_91900000_luna <--> 2019-04-20T20-43-12_91900000_brmlab (pass 1)
reference error = 0.229999 ppm, target error = 0.043490 ppm
Measured dist: 8.440393 target fitness: 1.140197 stddevs: 3.133262 target, 0.062276 reference
gold result: 11.303888
2019-04-20T20-43-12_91900000_luna <--> 2019-04-20T20-43-12_91900000_brmlab (pass 2)
snr: 37.5 46.2 dB
reference error = -0.007506 ppm, target error = 0.044164 ppm
Measured dist: 10.960242 target fitness: 1.141115 stddevs: 0.697230 target, 0.013491 reference
gold result: 11.303888
| correlation 3942 | 2019-04-20T20-43-12_91900000_luna | 2019-04-20T20-43-12_91900000_brevnov |
|---|
| gain | [9, 9, 9, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -51.560 stddev = 0.012 reference, 1.485 target [samples]; known correct: -55.050 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
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Correlator log
2019-04-20T20-43-12_91900000_luna <--> 2019-04-20T20-43-12_91900000_brevnov (pass 1)
reference error = -0.370919 ppm, target error = -0.052687 ppm
Measured dist: -56.288289 target fitness: 1.143335 stddevs: 5.222637 target, 0.098730 reference
gold result: -55.049702
2019-04-20T20-43-12_91900000_luna <--> 2019-04-20T20-43-12_91900000_brevnov (pass 2)
snr: 37.6 47.3 dB
reference error = -0.005762 ppm, target error = 0.149907 ppm
Measured dist: -51.559967 target fitness: 1.143124 stddevs: 1.485202 target, 0.011762 reference
gold result: -55.049702
| correlation 3943 | 2019-04-20T20-43-12_91900000_brmlab | 2019-04-20T20-43-12_91900000_brevnov |
|---|
| gain | [3, 3, 3, 1] | [4, 4, 4, 1] |
| samplerate | 2250000 | 2250000 Hz |
| histogram | ref: tgt: | ref: tgt: |
| ref. spectrum |  |  |
| tgt. spectrum |  |  |
| tgt. filtered |  |  |
| target_freq | 91900000 Hz |
| reference | DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz |
| result | -62.574 stddev = 0.005 reference, 1.346 target [samples]; known correct: -66.354 |
| Waterfall 1 | Correlation function | Waterfall 2 |
|---|
 |
|
 |
Correlator log
2019-04-20T20-43-12_91900000_brmlab <--> 2019-04-20T20-43-12_91900000_brevnov (pass 1)
reference error = -0.620601 ppm, target error = 0.024985 ppm
Measured dist: -67.658106 target fitness: 1.139230 stddevs: 11.705076 target, 0.170797 reference
gold result: -66.353590
2019-04-20T20-43-12_91900000_brmlab <--> 2019-04-20T20-43-12_91900000_brevnov (pass 2)
snr: 46.1 47.4 dB
reference error = 0.013523 ppm, target error = 0.069306 ppm
Measured dist: -62.574164 target fitness: 1.155226 stddevs: 1.345620 target, 0.005351 reference
gold result: -66.353590
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
