TDOA measurements at 105900 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 4430	2019-04-21T00-26-21_106300000_pankrac	2019-04-21T00-26-21_106300000_luna
gain	[15, 15, 15, 1]	[15, 15, 15, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-33.967 stddev = 0.007 reference, 5.577 target [samples]; known correct: -41.645

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_luna    (pass 1)
reference error = 0.303513 ppm, target error = 0.034078 ppm
Measured dist: -34.255892    target fitness: 1.853053  stddevs: 6.348294 target, 0.083459 reference
gold result: -41.645325

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_luna    (pass 2)
snr: 22.2 23.8 dB
reference error = -0.013228 ppm, target error = -0.084312 ppm
Measured dist: -33.967420    target fitness: 1.860704  stddevs: 5.576689 target, 0.006713 reference
gold result: -41.645325

correlation 4431	2019-04-21T00-26-21_106300000_pankrac	2019-04-21T00-26-21_106300000_brmlab
gain	[15, 15, 15, 1]	[15, 15, 15, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-5.799 stddev = 0.006 reference, 1.597 target [samples]; known correct: -2.870

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 1)
reference error = -0.388164 ppm, target error = -0.019549 ppm
Measured dist: -7.560094    target fitness: 1.848403  stddevs: 3.791494 target, 0.105514 reference
gold result: -2.869775

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 2)
snr: 22.3 15.5 dB
reference error = 0.016351 ppm, target error = -0.081834 ppm
Measured dist: -5.799222    target fitness: 1.875496  stddevs: 1.597069 target, 0.006223 reference
gold result: -2.869775

correlation 4432	2019-04-21T00-26-21_106300000_pankrac	2019-04-21T00-26-21_106300000_brevnov
gain	[15, 15, 15, 1]	[3, 3, 3, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-36.911 stddev = 0.004 reference, 1.719 target [samples]; known correct: -42.720

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 1)
reference error = 0.000726 ppm, target error = -0.078342 ppm
Measured dist: -36.910799    target fitness: 1.934495  stddevs: 1.717209 target, 0.003731 reference
gold result: -42.719992

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 22.2 62.3 dB
reference error = 0.002516 ppm, target error = -0.079899 ppm
Measured dist: -36.911250    target fitness: 1.934493  stddevs: 1.718646 target, 0.003968 reference
gold result: -42.719992

correlation 4433	2019-04-21T00-26-21_106300000_luna	2019-04-21T00-26-21_106300000_brmlab
gain	[15, 15, 15, 1]	[15, 15, 15, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	32.114 stddev = 0.009 reference, 4.771 target [samples]; known correct: 38.776

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 1)
reference error = -0.630451 ppm, target error = 0.116080 ppm
Measured dist: 34.723845    target fitness: 1.817717  stddevs: 8.235777 target, 0.172951 reference
gold result: 38.775550

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 2)
snr: 23.8 15.5 dB
reference error = -0.025687 ppm, target error = 0.002833 ppm
Measured dist: 32.113828    target fitness: 1.833784  stddevs: 4.771142 target, 0.008799 reference
gold result: 38.775550

correlation 4434	2019-04-21T00-26-21_106300000_luna	2019-04-21T00-26-21_106300000_brevnov
gain	[15, 15, 15, 1]	[3, 3, 3, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	0.106 stddev = 0.007 reference, 3.587 target [samples]; known correct: -1.075

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 1)
reference error = -0.305058 ppm, target error = 0.003948 ppm
Measured dist: 1.390384    target fitness: 1.803342  stddevs: 4.458481 target, 0.083993 reference
gold result: -1.074668

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 23.8 62.3 dB
reference error = 0.017446 ppm, target error = 0.037499 ppm
Measured dist: 0.105765    target fitness: 1.808404  stddevs: 3.587436 target, 0.006939 reference
gold result: -1.074668

correlation 4435	2019-04-21T00-26-21_106300000_brmlab	2019-04-21T00-26-21_106300000_brevnov
gain	[15, 15, 15, 1]	[3, 3, 3, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	106300000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-31.973 stddev = 0.006 reference, 1.053 target [samples]; known correct: -39.850

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-26-21_106300000_brmlab <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 1)
reference error = 0.387075 ppm, target error = 0.030371 ppm
Measured dist: -33.415778    target fitness: 1.876615  stddevs: 3.305641 target, 0.106756 reference
gold result: -39.850218

2019-04-21T00-26-21_106300000_brmlab <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 15.5 62.3 dB
reference error = -0.015582 ppm, target error = -0.026024 ppm
Measured dist: -31.973244    target fitness: 1.881345  stddevs: 1.052741 target, 0.005714 reference
gold result: -39.850218

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