TDOA measurements at 562000 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 3800	2019-04-20T19-54-56_562000000_pankrac	2019-04-20T19-54-56_562000000_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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-73.298 stddev = 0.010 reference, 70.364 target [samples]; known correct: -16.490

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_luna    (pass 1)
reference error = 0.390754 ppm, target error = -0.134790 ppm
Measured dist: -43.435228    target fitness: 2.685680  stddevs: 70.578316 target, 0.104126 reference
gold result: -16.489633

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_luna    (pass 2)
snr: 3.3 3.8 dB
reference error = -0.012808 ppm, target error = 0.141031 ppm
Measured dist: -73.297747    target fitness: 2.658789  stddevs: 70.364227 target, 0.010042 reference
gold result: -16.489633

correlation 3801	2019-04-20T19-54-56_562000000_pankrac	2019-04-20T19-54-56_562000000_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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	126.298 stddev = 0.006 reference, 72.389 target [samples]; known correct: -1.910

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_brmlab    (pass 1)
reference error = -0.303892 ppm, target error = -0.156689 ppm
Measured dist: 108.449534    target fitness: 2.684802  stddevs: 71.888443 target, 0.082215 reference
gold result: -1.909552

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_brmlab    (pass 2)
snr: 3.3 3.7 dB
reference error = 0.014967 ppm, target error = 0.443109 ppm
Measured dist: 126.297805    target fitness: 2.684649  stddevs: 72.389053 target, 0.005858 reference
gold result: -1.909552

correlation 3802	2019-04-20T19-54-56_562000000_pankrac	2019-04-20T19-54-56_562000000_brevnov
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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	128.667 stddev = 0.004 reference, 72.388 target [samples]; known correct: 27.744

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 1)
reference error = -0.032892 ppm, target error = 0.147288 ppm
Measured dist: 21.159299    target fitness: 2.573019  stddevs: 71.821869 target, 0.009753 reference
gold result: 27.744438

2019-04-20T19-54-56_562000000_pankrac <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 2)
snr: 3.3 3.6 dB
reference error = 0.001188 ppm, target error = -0.058437 ppm
Measured dist: 128.666620    target fitness: 2.575822  stddevs: 72.388458 target, 0.004155 reference
gold result: 27.744438

correlation 3803	2019-04-20T19-54-56_562000000_luna	2019-04-20T19-54-56_562000000_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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	14.696 stddev = 0.012 reference, 0.107 target [samples]; known correct: 14.580

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_luna <--> 2019-04-20T19-54-56_562000000_brmlab    (pass 1)
reference error = -0.639341 ppm, target error = -0.438259 ppm
Measured dist: 14.759323    target fitness: 2.687654  stddevs: 67.879265 target, 0.170038 reference
gold result: 14.580081

2019-04-20T19-54-56_562000000_luna <--> 2019-04-20T19-54-56_562000000_brmlab    (pass 2)
snr: 3.8 3.1 dB
reference error = -0.026556 ppm, target error = -0.004185 ppm
Measured dist: 14.695538    target fitness: 5.276308  stddevs: 0.106862 target, 0.011940 reference
gold result: 14.580081

correlation 3804	2019-04-20T19-54-56_562000000_luna	2019-04-20T19-54-56_562000000_brevnov
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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	44.294 stddev = 0.010 reference, 21.893 target [samples]; known correct: 44.234

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_luna <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 1)
reference error = -0.424150 ppm, target error = -0.338442 ppm
Measured dist: 44.362345    target fitness: 2.572709  stddevs: 71.601624 target, 0.113255 reference
gold result: 44.234071

2019-04-20T19-54-56_562000000_luna <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 2)
snr: 3.8 3.6 dB
reference error = 0.016327 ppm, target error = 0.024332 ppm
Measured dist: 44.294143    target fitness: 2.971111  stddevs: 21.892635 target, 0.009850 reference
gold result: 44.234071

correlation 3805	2019-04-20T19-54-56_562000000_brmlab	2019-04-20T19-54-56_562000000_brevnov
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	562000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	29.616 stddev = 0.004 reference, 0.097 target [samples]; known correct: 29.654

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-20T19-54-56_562000000_brmlab <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 1)
reference error = 0.268380 ppm, target error = 0.234690 ppm
Measured dist: 29.657544    target fitness: 3.627042  stddevs: 0.612535 target, 0.073653 reference
gold result: 29.653990

2019-04-20T19-54-56_562000000_brmlab <--> 2019-04-20T19-54-56_562000000_brevnov    (pass 2)
snr: 3.6 3.6 dB
reference error = -0.006172 ppm, target error = -0.006254 ppm
Measured dist: 29.615633    target fitness: 5.938171  stddevs: 0.096714 target, 0.004243 reference
gold result: 29.653990

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