TDOA measurements at 730000 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 4478	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_brmlab
gain	[8, 8, 8, 1]	[8, 8, 8, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-68.528 stddev = 0.006 reference, 0.031 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brmlab    (pass 1)
reference error = -0.911734 ppm, target error = -0.899544 ppm
Measured dist: -68.469534    target fitness: 9.135158  stddevs: 1.223103 target, 0.249181 reference

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brmlab    (pass 2)
snr: 8.9 18.5 dB
reference error = 0.016067 ppm, target error = 0.012789 ppm
Measured dist: -68.527912    target fitness: 36.428354  stddevs: 0.030845 target, 0.005914 reference

correlation 4479	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_brmlab
SFN	This is a second measurement on a SFN network (offset=199).

Correlator log

Recomputing with SFN intercept 199

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brmlab    (pass 2)
reference error = 0.016067 ppm, target error = 0.009884 ppm
Measured dist: 0.400314    target fitness: 13.567946  stddevs: 0.033917 target, 0.005914 reference

correlation 4480	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_luna
gain	[8, 8, 8, 1]	[8, 8, 8, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	60.219 stddev = 0.005 reference, 0.024 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_luna    (pass 1)
reference error = -0.267690 ppm, target error = -0.274238 ppm
Measured dist: 60.256161    target fitness: 20.687218  stddevs: 0.374324 target, 0.073259 reference

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_luna    (pass 2)
snr: 8.9 10.7 dB
reference error = 0.007194 ppm, target error = 0.008854 ppm
Measured dist: 60.219423    target fitness: 27.567081  stddevs: 0.023708 target, 0.004718 reference

correlation 4481	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_luna
SFN	This is a second measurement on a SFN network (offset=65).

Correlator log

Recomputing with SFN intercept 65

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_luna    (pass 2)
reference error = 0.007194 ppm, target error = 0.010236 ppm
Measured dist: -68.779051    target fitness: 29.713459  stddevs: 0.025762 target, 0.004718 reference

correlation 4482	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_brevnov
gain	[8, 8, 8, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-68.811 stddev = 0.004 reference, 0.038 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 1)
reference error = -0.624192 ppm, target error = -0.632909 ppm
Measured dist: -68.768027    target fitness: 18.108072  stddevs: 0.856428 target, 0.171655 reference

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
snr: 8.9 5.1 dB
reference error = -0.003277 ppm, target error = -0.015930 ppm
Measured dist: -68.811478    target fitness: 39.382648  stddevs: 0.038132 target, 0.003863 reference

correlation 4483	2019-04-27T03-07-42_730000000_pankrac	2019-04-27T03-07-42_730000000_brevnov
SFN	This is a second measurement on a SFN network (offset=196).

Correlator log

Recomputing with SFN intercept 196

2019-04-27T03-07-42_730000000_pankrac <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
reference error = -0.003277 ppm, target error = -0.004879 ppm
Measured dist: 0.117767    target fitness: 16.159340  stddevs: 0.034638 target, 0.003863 reference

correlation 4484	2019-04-27T03-07-42_730000000_brmlab	2019-04-27T03-07-42_730000000_luna
gain	[8, 8, 8, 1]	[8, 8, 8, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-0.242 stddev = 0.008 reference, 0.048 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_luna    (pass 1)
reference error = 0.607723 ppm, target error = 0.512623 ppm
Measured dist: 128.504725    target fitness: 11.265450  stddevs: 40.960388 target, 0.165070 reference

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_luna    (pass 2)
snr: 18.7 10.7 dB
reference error = 0.027131 ppm, target error = 0.029902 ppm
Measured dist: -0.242062    target fitness: 24.548764  stddevs: 0.047514 target, 0.008400 reference

correlation 4485	2019-04-27T03-07-42_730000000_brmlab	2019-04-27T03-07-42_730000000_luna
SFN	This is a second measurement on a SFN network (offset=127).

Correlator log

Recomputing with SFN intercept 127

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_luna    (pass 2)
reference error = 0.027131 ppm, target error = 0.000000 ppm
Measured dist: 127.900720    target fitness: 25.087765  stddevs: 0.000000 target, 0.008400 reference

correlation 4486	2019-04-27T03-07-42_730000000_brmlab	2019-04-27T03-07-42_730000000_brevnov
gain	[8, 8, 8, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-0.349 stddev = 0.004 reference, 0.000 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 1)
reference error = 0.262834 ppm, target error = 0.287419 ppm
Measured dist: -0.353486    target fitness: 27.163793  stddevs: 0.402785 target, 0.072644 reference

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
snr: 18.7 5.1 dB
reference error = -0.003528 ppm, target error = 0.000003 ppm
Measured dist: -0.349355    target fitness: 37.474412  stddevs: 0.000231 target, 0.003761 reference

correlation 4487	2019-04-27T03-07-42_730000000_brmlab	2019-04-27T03-07-42_730000000_brevnov
SFN	This is a second measurement on a SFN network (offset=128).

Correlator log

Recomputing with SFN intercept 128

2019-04-27T03-07-42_730000000_brmlab <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
reference error = -0.003528 ppm, target error = 0.000000 ppm
Measured dist: -1.357167    target fitness: 18.459905  stddevs: 0.000000 target, 0.003761 reference

correlation 4488	2019-04-27T03-07-42_730000000_luna	2019-04-27T03-07-42_730000000_brevnov
gain	[8, 8, 8, 1]	[4, 4, 4, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	730000000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-0.103 stddev = 0.006 reference, 0.045 target [samples]; known correct: None

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-27T03-07-42_730000000_luna <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 1)
reference error = -0.351129 ppm, target error = -0.365658 ppm
Measured dist: 38.979733    target fitness: 3.886685  stddevs: 19.300785 target, 0.096608 reference

2019-04-27T03-07-42_730000000_luna <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
snr: 10.7 5.1 dB
reference error = -0.016491 ppm, target error = -0.027789 ppm
Measured dist: -0.103137    target fitness: 30.809478  stddevs: 0.045453 target, 0.006288 reference

correlation 4489	2019-04-27T03-07-42_730000000_luna	2019-04-27T03-07-42_730000000_brevnov
SFN	This is a second measurement on a SFN network (offset=125).

Correlator log

Recomputing with SFN intercept 125

2019-04-27T03-07-42_730000000_luna <--> 2019-04-27T03-07-42_730000000_brevnov    (pass 2)
reference error = -0.016491 ppm, target error = -0.030474 ppm
Measured dist: -1.730343    target fitness: 11.997551  stddevs: 0.062487 target, 0.006288 reference

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

+−

Leaflet