TDOA measurements at 99700 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 4076	2019-04-20T21-28-35_99700000_pankrac	2019-04-20T21-28-35_99700000_brmlab
gain	[1, 1, 1, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	55.960 stddev = 0.005 reference, 0.714 target [samples]; known correct: 53.089

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_brmlab    (pass 1)
reference error = 0.538906 ppm, target error = 0.055566 ppm
Measured dist: 57.619770    target fitness: 1.810742  stddevs: 3.857785 target, 0.148419 reference
gold result: 53.089377

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_brmlab    (pass 2)
snr: 59.3 53.6 dB
reference error = -0.008010 ppm, target error = -0.097932 ppm
Measured dist: 55.960060    target fitness: 1.807735  stddevs: 0.713749 target, 0.004893 reference
gold result: 53.089377

correlation 4077	2019-04-20T21-28-35_99700000_pankrac	2019-04-20T21-28-35_99700000_luna
gain	[1, 1, 1, 1]	[8, 8, 8, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	60.786 stddev = 0.008 reference, 0.217 target [samples]; known correct: 59.771

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_luna    (pass 1)
reference error = 0.290155 ppm, target error = 0.037789 ppm
Measured dist: 60.359396    target fitness: 1.833655  stddevs: 1.874233 target, 0.079866 reference
gold result: 59.770501

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_luna    (pass 2)
snr: 59.3 40.9 dB
reference error = -0.008502 ppm, target error = -0.011716 ppm
Measured dist: 60.786002    target fitness: 1.827636  stddevs: 0.216641 target, 0.008028 reference
gold result: 59.770501

correlation 4078	2019-04-20T21-28-35_99700000_pankrac	2019-04-20T21-28-35_99700000_brevnov
gain	[1, 1, 1, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	65.003 stddev = 0.004 reference, 12.188 target [samples]; known correct: 35.915

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 1)
reference error = -0.094854 ppm, target error = 0.000988 ppm
Measured dist: 66.903885    target fitness: 1.665948  stddevs: 12.268755 target, 0.026042 reference
gold result: 35.914913

2019-04-20T21-28-35_99700000_pankrac <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 2)
snr: 59.3 36.9 dB
reference error = 0.001656 ppm, target error = -0.041555 ppm
Measured dist: 65.003269    target fitness: 1.659901  stddevs: 12.187721 target, 0.003803 reference
gold result: 35.914913

correlation 4079	2019-04-20T21-28-35_99700000_brmlab	2019-04-20T21-28-35_99700000_luna
gain	[5, 5, 5, 1]	[8, 8, 8, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	4.659 stddev = 0.008 reference, 0.607 target [samples]; known correct: 6.681

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_brmlab <--> 2019-04-20T21-28-35_99700000_luna    (pass 1)
reference error = -0.239881 ppm, target error = -0.038918 ppm
Measured dist: 4.641281    target fitness: 1.698556  stddevs: 1.871358 target, 0.066749 reference
gold result: 6.681123

2019-04-20T21-28-35_99700000_brmlab <--> 2019-04-20T21-28-35_99700000_luna    (pass 2)
snr: 53.8 40.8 dB
reference error = 0.000283 ppm, target error = 0.075108 ppm
Measured dist: 4.658851    target fitness: 1.696779  stddevs: 0.606986 target, 0.007739 reference
gold result: 6.681123

correlation 4080	2019-04-20T21-28-35_99700000_brmlab	2019-04-20T21-28-35_99700000_brevnov
gain	[5, 5, 5, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	8.498 stddev = 0.005 reference, 8.247 target [samples]; known correct: -17.174

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_brmlab <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 1)
reference error = -0.633042 ppm, target error = -0.014080 ppm
Measured dist: 11.187487    target fitness: 1.464547  stddevs: 12.945768 target, 0.174090 reference
gold result: -17.174464

2019-04-20T21-28-35_99700000_brmlab <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 2)
snr: 53.9 36.9 dB
reference error = 0.011588 ppm, target error = 0.050331 ppm
Measured dist: 8.498198    target fitness: 1.505932  stddevs: 8.246940 target, 0.005250 reference
gold result: -17.174464

correlation 4081	2019-04-20T21-28-35_99700000_luna	2019-04-20T21-28-35_99700000_brevnov
gain	[8, 8, 8, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	99700000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	5.270 stddev = 0.010 reference, 10.079 target [samples]; known correct: -23.856

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T21-28-35_99700000_luna <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 1)
reference error = -0.393270 ppm, target error = -0.054653 ppm
Measured dist: 8.427884    target fitness: 1.481801  stddevs: 12.823582 target, 0.107319 reference
gold result: -23.855587

2019-04-20T21-28-35_99700000_luna <--> 2019-04-20T21-28-35_99700000_brevnov    (pass 2)
snr: 40.9 36.9 dB
reference error = 0.020665 ppm, target error = 0.000759 ppm
Measured dist: 5.269827    target fitness: 1.482115  stddevs: 10.079478 target, 0.009541 reference
gold result: -23.855587

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