TDOA measurements at 107200 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 4436	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	-2.900 stddev = 0.007 reference, 4.374 target [samples]; known correct: 19.567

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 = 0.303422 ppm, target error = -0.013527 ppm
Measured dist: -2.299215    target fitness: 1.238599  stddevs: 7.534170 target, 0.083434 reference
gold result: 19.567306

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_luna    (pass 2)
snr: 24.7 23.8 dB
reference error = -0.013144 ppm, target error = -0.030697 ppm
Measured dist: -2.899699    target fitness: 1.236663  stddevs: 4.373505 target, 0.006672 reference
gold result: 19.567306

correlation 4437	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	-1.855 stddev = 0.006 reference, 2.005 target [samples]; known correct: 16.115

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 = -0.086384 ppm
Measured dist: -2.521980    target fitness: 1.246372  stddevs: 3.371290 target, 0.105514 reference
gold result: 16.115192

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 2)
snr: 24.6 25.6 dB
reference error = 0.016351 ppm, target error = -0.062969 ppm
Measured dist: -1.854638    target fitness: 1.247069  stddevs: 2.004672 target, 0.006223 reference
gold result: 16.115192

correlation 4438	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	-2.054 stddev = 0.004 reference, 1.915 target [samples]; known correct: 35.351

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 = -0.041257 ppm
Measured dist: -2.050157    target fitness: 1.241238  stddevs: 1.906897 target, 0.003731 reference
gold result: 35.351458

2019-04-21T00-26-21_106300000_pankrac <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 24.7 21.9 dB
reference error = 0.002494 ppm, target error = -0.041252 ppm
Measured dist: -2.053840    target fitness: 1.241108  stddevs: 1.914682 target, 0.003960 reference
gold result: 35.351458

correlation 4439	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	-0.032 stddev = 0.009 reference, 3.065 target [samples]; known correct: -3.452

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 = -0.053275 ppm
Measured dist: -0.157856    target fitness: 1.244516  stddevs: 11.657681 target, 0.172951 reference
gold result: -3.452113

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brmlab    (pass 2)
snr: 23.8 26.5 dB
reference error = -0.025687 ppm, target error = 0.011156 ppm
Measured dist: -0.032032    target fitness: 1.241472  stddevs: 3.065344 target, 0.008799 reference
gold result: -3.452113

correlation 4440	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	-1.056 stddev = 0.007 reference, 3.334 target [samples]; known correct: 15.784

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 = -0.055410 ppm
Measured dist: 0.270921    target fitness: 1.235694  stddevs: 6.657506 target, 0.083993 reference
gold result: 15.784152

2019-04-21T00-26-21_106300000_luna <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 23.8 22.0 dB
reference error = 0.017446 ppm, target error = 0.024806 ppm
Measured dist: -1.055847    target fitness: 1.236006  stddevs: 3.334227 target, 0.006939 reference
gold result: 15.784152

correlation 4441	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	-1.040 stddev = 0.006 reference, 1.658 target [samples]; known correct: 19.236

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 = 0.085863 ppm
Measured dist: -0.390867    target fitness: 1.244013  stddevs: 3.703773 target, 0.106756 reference
gold result: 19.236265

2019-04-21T00-26-21_106300000_brmlab <--> 2019-04-21T00-26-21_106300000_brevnov    (pass 2)
snr: 25.6 21.9 dB
reference error = -0.015582 ppm, target error = 0.108102 ppm
Measured dist: -1.040414    target fitness: 1.239996  stddevs: 1.658252 target, 0.005714 reference
gold result: 19.236265

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