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Loggings => DGPS => Topic started by: Oliver on December 22, 2016, 2059 UTC

Title: DGPS Logs 20 Dec 2016 - Germany
Post by: Oliver on December 22, 2016, 2059 UTC

This is the result of my first run with Amalgamated DGPS.

Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
1        881  262  263  302,0 100  Point Loma, CA                 United States        32,677   -117,25  9.276  316
1        715  015  001  297,0 200  Exmouth, WE                    Australia            -21,885  114,134  13.003 92 
1        972  901  902  302,0 200  Miraflores                        Panama               8,993    -79,585  9.057  274
1        644  688  689  302,0 200  Hachijo Shima Lt               Japan                33,088   139,869  9.551  39 
1        373  545  546  301,0 200  Rumelifeneri                    Turkey               41,239   29,113   1.951  116
1        468  734  001  298,0 100  Nynashamn                      Sweden               58,946   17,958   1.090  32 
1        831  102  103  298,0 100  Upper Keweenaw, MI         United States        47,233   -88,628  6.509  308
1        946  344  345  299,0 200  Rigolet, NL                       Canada               54,25    -58,5    4.329  302
1        510  790  820  301,0 200  Halten Lt                         Norway               64,176   9,41     1.468  3   
1        001  460  001  300,0 100  Ponta se Sao Marcos Lt      Brazil               -2,492   -44,302  7.719  237
1        880  260  261  300,0 200  Kokole Point, Hi                Hawaii               21,984   -159,765 11.810 348
1        622  644  645  301,0 200  Naozhoudao                     China                20,9     110,6    9.062  67 
2        847  058  059  301,0 200  Annapolis, MD                  United States        39,018   -76,61   6.403  294
2        937  330  331  298,0 200  Hartlen Point, NS              Canada               44,583   -63,45   5.166  291
2        446  686  696  297,0 100  Girdle Ness Lt                  Scotland             57,142   -2,056   941    320
3        866  162  163  299,0 200  Sallisaw, OK                    United States        35,369   -94,817  7.819  302
3        639  678  679  302,0 200  Shiriya Saki                    Japan                41,437   141,469  8.796  34 
3        792  136  137  297,0 200  Bobo, MS                        United States        34,125   -90,696  7.674  299


I used an audio recording of 3,32 minutes made with an Elad FDM-S2 and longwire antenna at 50°-230°.
Recording start was 1632 UTC.

For sure I have to optimize my Elad settings, since the file is way to large and took almost two hours to decode. But it's a start I guess.

How accurate the loggings truly are is another question I will have to find out in the next few weeks.

Title: Re: DGPS Logs 20 Dec 2016 - Germany
Post by: ChrisSmolinski on December 22, 2016, 2156 UTC

Great to see your first logs, Oliver.

Since you're in Europe, you may want to make sure the 0.5 khz channel option is ON, since there are lot of such stations over there.

What are your ZCount settings, offset and max error?  Offset should be 24, for the max error 20 or 30 may be a good place to start.

You may be able to directly feed I/Q recordings from your Elad, if you used audio this time. A narrow recording seems to work best, as close to 50 kHz as you can get, centered at 305 kHz.

How long was the recording? Two hours seems too long to take to decode just 3 minutes of audio.  Or was this really an I/Q file?