TDOA measurements at 103700 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 4424	2019-04-21T00-19-48_102900000_pankrac	2019-04-21T00-19-48_102900000_luna
gain	[8, 8, 8, 1]	[9, 9, 9, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	16.043 stddev = 0.006 reference, 0.636 target [samples]; known correct: 15.836

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_luna    (pass 1)
reference error = 0.309841 ppm, target error = 0.051514 ppm
Measured dist: 15.602948    target fitness: 1.378921  stddevs: 2.102965 target, 0.083813 reference
gold result: 15.836457

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_luna    (pass 2)
snr: 42.7 32.4 dB
reference error = -0.013768 ppm, target error = -0.091291 ppm
Measured dist: 16.043393    target fitness: 1.380811  stddevs: 0.635662 target, 0.006248 reference
gold result: 15.836457

correlation 4425	2019-04-21T00-19-48_102900000_pankrac	2019-04-21T00-19-48_102900000_brmlab
gain	[8, 8, 8, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	29.974 stddev = 0.012 reference, 0.939 target [samples]; known correct: 27.728

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_brmlab    (pass 1)
reference error = 0.484281 ppm, target error = 0.021267 ppm
Measured dist: 27.083827    target fitness: 1.405998  stddevs: 4.236294 target, 0.131680 reference
gold result: 27.728272

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_brmlab    (pass 2)
snr: 42.7 52.8 dB
reference error = 0.039719 ppm, target error = 0.092436 ppm
Measured dist: 29.974478    target fitness: 1.394075  stddevs: 0.939444 target, 0.011541 reference
gold result: 27.728272

correlation 4426	2019-04-21T00-19-48_102900000_pankrac	2019-04-21T00-19-48_102900000_brevnov
gain	[8, 8, 8, 1]	[6, 6, 6, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-37.259 stddev = 0.004 reference, 1.362 target [samples]; known correct: -38.660

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 1)
reference error = -0.029608 ppm, target error = -0.222808 ppm
Measured dist: -37.279092    target fitness: 1.366653  stddevs: 1.406359 target, 0.009227 reference
gold result: -38.660396

2019-04-21T00-19-48_102900000_pankrac <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 2)
snr: 42.7 47.0 dB
reference error = 0.002263 ppm, target error = -0.217007 ppm
Measured dist: -37.259100    target fitness: 1.368104  stddevs: 1.361797 target, 0.004000 reference
gold result: -38.660396

correlation 4427	2019-04-21T00-19-48_102900000_luna	2019-04-21T00-19-48_102900000_brmlab
gain	[9, 9, 9, 1]	[5, 5, 5, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	14.127 stddev = 0.007 reference, 0.739 target [samples]; known correct: 11.892

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_luna <--> 2019-04-21T00-19-48_102900000_brmlab    (pass 1)
reference error = 0.230022 ppm, target error = 0.077417 ppm
Measured dist: 13.562143    target fitness: 1.351230  stddevs: 2.057542 target, 0.062415 reference
gold result: 11.891815

2019-04-21T00-19-48_102900000_luna <--> 2019-04-21T00-19-48_102900000_brmlab    (pass 2)
snr: 32.4 52.8 dB
reference error = -0.004875 ppm, target error = 0.021938 ppm
Measured dist: 14.127206    target fitness: 1.351351  stddevs: 0.738897 target, 0.007283 reference
gold result: 11.891815

correlation 4428	2019-04-21T00-19-48_102900000_luna	2019-04-21T00-19-48_102900000_brevnov
gain	[9, 9, 9, 1]	[6, 6, 6, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-53.232 stddev = 0.010 reference, 1.018 target [samples]; known correct: -54.497

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_luna <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 1)
reference error = -0.294205 ppm, target error = -0.021264 ppm
Measured dist: -53.019507    target fitness: 1.391044  stddevs: 2.602798 target, 0.080529 reference
gold result: -54.496853

2019-04-21T00-19-48_102900000_luna <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 2)
snr: 32.4 47.0 dB
reference error = -0.026208 ppm, target error = -0.251014 ppm
Measured dist: -53.232345    target fitness: 1.398378  stddevs: 1.017657 target, 0.009521 reference
gold result: -54.496853

correlation 4429	2019-04-21T00-19-48_102900000_brmlab	2019-04-21T00-19-48_102900000_brevnov
gain	[5, 5, 5, 1]	[6, 6, 6, 1]
samplerate	2250000	2250000 Hz
histogram	ref: tgt:	ref: tgt:
ref. spectrum
tgt. spectrum
tgt. filtered
target_freq	102900000 Hz
reference	DAB Final Lic: VYSÍLACÍ SÍŤ A, PRAHA MESTO, 227360 kHz
result	-67.288 stddev = 0.005 reference, 1.055 target [samples]; known correct: -66.389

Waterfall 1	Correlation function	Waterfall 2

Correlator log

2019-04-21T00-19-48_102900000_brmlab <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 1)
reference error = -0.559382 ppm, target error = -0.015381 ppm
Measured dist: -67.543563    target fitness: 1.423165  stddevs: 4.483222 target, 0.152168 reference
gold result: -66.388668

2019-04-21T00-19-48_102900000_brmlab <--> 2019-04-21T00-19-48_102900000_brevnov    (pass 2)
snr: 52.9 47.0 dB
reference error = 0.010232 ppm, target error = -0.298395 ppm
Measured dist: -67.288368    target fitness: 1.447070  stddevs: 1.054794 target, 0.004979 reference
gold result: -66.388668

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