TDOA measurements at 94100 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 4442	2019-04-21T00-32-18_94100000_pankrac	2019-04-21T00-32-18_94100000_brmlab
gain	[8, 8, 8, 1]	[2, 2, 2, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	17.363 stddev = 0.008 reference, 1.348 target [samples]; known correct: 18.948

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_brmlab    (pass 1)
reference error = 0.559508 ppm, target error = 0.024874 ppm
Measured dist: 17.629307    target fitness: 1.796167  stddevs: 4.032502 target, 0.152718 reference
gold result: 18.947899

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_brmlab    (pass 2)
snr: 23.5 24.7 dB
reference error = -0.023597 ppm, target error = -0.109526 ppm
Measured dist: 17.362561    target fitness: 1.811480  stddevs: 1.347819 target, 0.007531 reference
gold result: 18.947899

correlation 4443	2019-04-21T00-32-18_94100000_pankrac	2019-04-21T00-32-18_94100000_luna
gain	[8, 8, 8, 1]	[10, 10, 10, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	25.376 stddev = 0.236 reference, 1.486 target [samples]; known correct: 28.624

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_luna    (pass 1)
reference error = 0.430717 ppm, target error = 0.026733 ppm
Measured dist: 26.004749    target fitness: 1.817783  stddevs: 1.995828 target, 0.263944 reference
gold result: 28.624249

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_luna    (pass 2)
snr: 23.5 15.8 dB
reference error = 0.036286 ppm, target error = -0.017607 ppm
Measured dist: 25.375828    target fitness: 1.818570  stddevs: 1.485649 target, 0.235921 reference
gold result: 28.624249

correlation 4444	2019-04-21T00-32-18_94100000_pankrac	2019-04-21T00-32-18_94100000_brevnov
gain	[8, 8, 8, 1]	[7, 7, 7, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	19.879 stddev = 0.004 reference, 1.321 target [samples]; known correct: 27.214

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 1)
reference error = -0.044855 ppm, target error = -0.186569 ppm
Measured dist: 19.872909    target fitness: 1.830161  stddevs: 1.382206 target, 0.013183 reference
gold result: 27.214473

2019-04-21T00-32-18_94100000_pankrac <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 2)
snr: 23.5 26.8 dB
reference error = 0.000627 ppm, target error = -0.177760 ppm
Measured dist: 19.878860    target fitness: 1.830452  stddevs: 1.320856 target, 0.003791 reference
gold result: 27.214473

correlation 4445	2019-04-21T00-32-18_94100000_brmlab	2019-04-21T00-32-18_94100000_luna
gain	[2, 2, 2, 1]	[10, 10, 10, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	8.489 stddev = 0.238 reference, 1.130 target [samples]; known correct: 9.676

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_brmlab <--> 2019-04-21T00-32-18_94100000_luna    (pass 1)
reference error = -0.151517 ppm, target error = 0.024944 ppm
Measured dist: 8.340093    target fitness: 1.823199  stddevs: 2.076121 target, 0.200448 reference
gold result: 9.676350

2019-04-21T00-32-18_94100000_brmlab <--> 2019-04-21T00-32-18_94100000_luna    (pass 2)
snr: 24.6 15.8 dB
reference error = 0.080379 ppm, target error = -0.049651 ppm
Measured dist: 8.489144    target fitness: 1.821144  stddevs: 1.130244 target, 0.238386 reference
gold result: 9.676350

correlation 4446	2019-04-21T00-32-18_94100000_brmlab	2019-04-21T00-32-18_94100000_brevnov
gain	[2, 2, 2, 1]	[7, 7, 7, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	2.331 stddev = 0.004 reference, 1.126 target [samples]; known correct: 8.267

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_brmlab <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 1)
reference error = -0.587606 ppm, target error = -0.071747 ppm
Measured dist: 3.028619    target fitness: 1.832573  stddevs: 4.154147 target, 0.158729 reference
gold result: 8.266574

2019-04-21T00-32-18_94100000_brmlab <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 2)
snr: 24.6 26.8 dB
reference error = 0.005479 ppm, target error = -0.103270 ppm
Measured dist: 2.330582    target fitness: 1.845431  stddevs: 1.125797 target, 0.003924 reference
gold result: 8.266574

correlation 4447	2019-04-21T00-32-18_94100000_luna	2019-04-21T00-32-18_94100000_brevnov
gain	[10, 10, 10, 1]	[7, 7, 7, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	94100000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-6.310 stddev = 0.237 reference, 1.559 target [samples]; known correct: -1.410

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-32-18_94100000_luna <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 1)
reference error = -0.460974 ppm, target error = -0.094498 ppm
Measured dist: -6.178813    target fitness: 1.854959  stddevs: 2.440057 target, 0.228968 reference
gold result: -1.409776

2019-04-21T00-32-18_94100000_luna <--> 2019-04-21T00-32-18_94100000_brevnov    (pass 2)
snr: 15.8 26.7 dB
reference error = -0.043777 ppm, target error = -0.083589 ppm
Measured dist: -6.310249    target fitness: 1.859612  stddevs: 1.558809 target, 0.236604 reference
gold result: -1.409776

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