TDOA measurements at 216928 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 4382	2019-04-21T00-06-07_216928000_pankrac	2019-04-21T00-06-07_216928000_luna
gain	[5, 5, 5, 1]	[10, 10, 10, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	16.130 stddev = 0.005 reference, 0.005 target [samples]; known correct: 15.836

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_luna    (pass 1)
reference error = 0.280644 ppm, target error = 0.281547 ppm
Measured dist: 16.146523    target fitness: 35.847797  stddevs: 0.383453 target, 0.076461 reference
gold result: 15.836457

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_luna    (pass 2)
snr: 41.6 24.5 dB
reference error = -0.005730 ppm, target error = 0.001473 ppm
Measured dist: 16.130324    target fitness: 36.236037  stddevs: 0.004922 target, 0.005448 reference
gold result: 15.836457

correlation 4383	2019-04-21T00-06-07_216928000_pankrac	2019-04-21T00-06-07_216928000_brmlab
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	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	27.722 stddev = 0.005 reference, 0.018 target [samples]; known correct: 27.728

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_brmlab    (pass 1)
reference error = 0.503584 ppm, target error = 0.516129 ppm
Measured dist: 27.707538    target fitness: 35.229340  stddevs: 0.698674 target, 0.138253 reference
gold result: 27.728272

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_brmlab    (pass 2)
snr: 41.6 40.1 dB
reference error = 0.012533 ppm, target error = 0.013098 ppm
Measured dist: 27.721597    target fitness: 36.805771  stddevs: 0.018137 target, 0.005117 reference
gold result: 27.728272

correlation 4384	2019-04-21T00-06-07_216928000_pankrac	2019-04-21T00-06-07_216928000_brevnov
gain	[5, 5, 5, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-38.600 stddev = 0.004 reference, 0.000 target [samples]; known correct: -38.660

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 1)
reference error = -0.032865 ppm, target error = -0.032140 ppm
Measured dist: -38.610086    target fitness: 37.105666  stddevs: 0.043815 target, 0.009829 reference
gold result: -38.660396

2019-04-21T00-06-07_216928000_pankrac <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 2)
snr: 41.6 42.8 dB
reference error = 0.001825 ppm, target error = 0.000000 ppm
Measured dist: -38.600210    target fitness: 37.133182  stddevs: 0.000000 target, 0.003896 reference
gold result: -38.660396

correlation 4385	2019-04-21T00-06-07_216928000_luna	2019-04-21T00-06-07_216928000_brmlab
gain	[10, 10, 10, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	11.684 stddev = 0.010 reference, 0.026 target [samples]; known correct: 11.892

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_luna <--> 2019-04-21T00-06-07_216928000_brmlab    (pass 1)
reference error = 0.209678 ppm, target error = 0.240967 ppm
Measured dist: 11.652856    target fitness: 34.658638  stddevs: 0.318826 target, 0.057536 reference
gold result: 11.891815

2019-04-21T00-06-07_216928000_luna <--> 2019-04-21T00-06-07_216928000_brmlab    (pass 2)
snr: 24.5 39.6 dB
reference error = 0.033713 ppm, target error = 0.018515 ppm
Measured dist: 11.683833    target fitness: 34.567490  stddevs: 0.025604 target, 0.010341 reference
gold result: 11.891815

correlation 4386	2019-04-21T00-06-07_216928000_luna	2019-04-21T00-06-07_216928000_brevnov
gain	[10, 10, 10, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-54.754 stddev = 0.007 reference, 0.014 target [samples]; known correct: -54.497

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_luna <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 1)
reference error = -0.324524 ppm, target error = -0.313523 ppm
Measured dist: -54.739133    target fitness: 35.247160  stddevs: 0.424601 target, 0.088009 reference
gold result: -54.496853

2019-04-21T00-06-07_216928000_luna <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 2)
snr: 24.5 42.8 dB
reference error = 0.017766 ppm, target error = 0.010016 ppm
Measured dist: -54.753853    target fitness: 35.611008  stddevs: 0.014314 target, 0.007052 reference
gold result: -54.496853

correlation 4387	2019-04-21T00-06-07_216928000_brmlab	2019-04-21T00-06-07_216928000_brevnov
gain	[5, 5, 5, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	216928000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-66.331 stddev = 0.006 reference, 0.022 target [samples]; known correct: -66.389

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-06-07_216928000_brmlab <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 1)
reference error = -0.563047 ppm, target error = -0.546786 ppm
Measured dist: -66.325562    target fitness: 35.663234  stddevs: 0.740056 target, 0.154527 reference
gold result: -66.388668

2019-04-21T00-06-07_216928000_brmlab <--> 2019-04-21T00-06-07_216928000_brevnov    (pass 2)
snr: 40.2 42.8 dB
reference error = 0.015861 ppm, target error = 0.015855 ppm
Measured dist: -66.331214    target fitness: 37.613896  stddevs: 0.021721 target, 0.006043 reference
gold result: -66.388668

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