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Author Topic: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300  (Read 2173 times)

Offline skeezix

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DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« on: November 21, 2016, 0509 UTC »
The S Africa one is definitely a false decode. The rest seem good.

Nothing terribly exciting in the data here, except for perhaps Panama. On the other hand, the graph is interesting, specifically the 1400-1700 UTC (0800-1100 CST, 0900-1200 EST) catch of NC, SC, and VA. Wasn't expecting them to be coming in during the morning like this, especially since they're off to the side of the loop. The SDR will continue to record continuously for a while and we'll see how the upcoming days are.


Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
4        203  223  243  301.0 100  Cape Aghulas                   South Africa         -34.838  20.021   14,392 103
5        907  304  305  320.0 200  Richmond, BC                   Canada               49.114   -123.183 2,283  292
7        919  308  309  306.0 200  Cardinal, ON                   Canada               44.783   -75.417  1,417  85 
11       839  118  119  322.0 100  Youngstown, NY                 United States        43.239   -78.972  1,170  95 
11       885  270  271  292.0 100  Cape Mendocino, CA             United States        40.447   -124.405 2,563  270
96       799  044  045  290.0 200  Penobscot, ME                  United States        44.453   -68.776  1,942  83 
174      886  272  273  287.0 100  Fort Stevens, OR               United States        46.208   -123.96  2,363  284
178      918  310  311  286.0 200  Wiarton, ON                    Canada               44.75    -81.117  971    87 
198      830  100  101  296.0 100  Wisconsin, Point WI            United States        46.708   -92.025  219    30 
203      881  262  263  302.0 100  Point Loma, CA                 United States        32.677   -117.25  2,462  244
451      847  058  059  301.0 200  Annapolis, MD                  United States        39.018   -76.61   1,538  110
536      804  008  009  286.0 200  Sandy Hook, NJ                 United States        40.475   -74.02   1,659  101
924      927  316  317  309.0 200  Lauzon, QC                     Canada               46.821   -71.165  1,729  75 
935      870  170  171  309.0 200  Reedy Point, DE                United States        39.569   -75.572  1,585  106
970      816  032  033  304.0 100  Aransas Pass, TX               United States        27.842   -97.065  1,936  191
1375     871  172  173  300.0 100  Appleton, WA                   United States        45.792   -121.332 2,168  282
1966     929  312  313  296.0 200  St Jean Richelieu, QC          Canada               45.324   -73.317  1,574  82 
2412     764  210  211  314.0 200  Lincoln, CA                    United States        38.855   -121.361 2,395  263
2739     972  901  902  302.0 200  Miraflores                     Panama               8.993    -79.585  4,220  157
6841     809  018  019  289.0 100  Cape Canaveral, FL             United States        28.467   -80.554  2,162  144
9529     844  094  095  324.0 200  Hudson Falls, NY               United States        43.272   -73.542  1,595  90 
10559    808  016  017  314.0 200  Card Sound, FL                 United States        25.442   -80.452  2,468  147
10665    772  198  199  306.0 200  Acushnet, MA                   United States        41.749   -70.889  1,852  93 
13233    778  192  193  292.0 100  Kensington, SC                 United States        33.491   -79.349  1,759  132
15625    836  112  113  292.0 200  Cheboygan, MI                  United States        45.656   -84.475  704    81 
22632    806  012  013  289.0 100  Driver, VA                     United States        36.963   -76.562  1,670  116
31029    771  196  197  294.0 100  New Bern, NC                   United States        35.181   -77.059  1,765  123
42383    865  160  161  320.0 200  Millers Ferry, AL              United States        32.095   -87.397  1,528  158
44145    828  246  247  301.0 100  Angleton, TX                   United States        29.301   -95.484  1,756  187
50191    814  028  029  293.0 200  English Turn, LA               United States        29.886   -89.947  1,709  169
56159    838  116  117  319.0 200  Detroit, MI                    United States        42.306   -83.103  883    106
58037    827  244  245  312.0 200  Tampa, FL                      United States        27.85    -82.543  2,138  149
69231    869  168  169  290.0 200  Louisville, KY                 United States        38.018   -85.31   1,030  136
70474    831  102  103  298.0 100  Upper Keweenaw, MI             United States        47.233   -88.628  446    55 
99654    792  136  137  297.0 200  Bobo, MS                       United States        34.125   -90.696  1,233  168
110815   866  162  163  299.0 200  Sallisaw, OK                   United States        35.369   -94.817  1,078  187
134593   777  218  219  304.0 200  Mequon, WI                     United States        43.202   -88.066  474    113
139271   862  154  155  322.0 200  St Louis, MO                   United States        38.619   -89.764  773    156
141814   863  156  157  311.0 200  Rock Island IL                 United States        42.02    -90.231  421    141
142116   864  158  159  317.0 200  St Paul [Alma], MN             United States        44.306   -91.906  144    122





Perseus SDR with Wellbrook ALA1530S+ loop oriented N-S
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Offline ChrisSmolinski

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #1 on: November 21, 2016, 2018 UTC »
Quote from: skeezix on November 21, 2016, 0509 UTC
Nothing terribly exciting in the data here, except for perhaps Panama. On the other hand, the graph is interesting, specifically the 1400-1700 UTC (0800-1100 CST, 0900-1200 EST) catch of NC, SC, and VA. Wasn't expecting them to be coming in during the morning like this, especially since they're off to the side of the loop. The SDR will continue to record continuously for a while and we'll see how the upcoming days are.

Panama is regarded as a pest here :)  There is a second station in Panama (Gatun 307 kHz) that I have logged in the past, but not recently. I wonder if it is off the air?

I've noticed interesting daytime catches as well, where the signal from one or more stations will suddenly appear for a few minutes, then vanish again. It reminds me of HF propagation on 43 meters, when after the band has gone long, a station will suddenly appear again with presumably NVIS propagation for a few minutes, usually with a strong signal, then vanish again. Both the fade in and out are very quick in that case, almost instantaneous.
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Offline skeezix

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #2 on: November 23, 2016, 0459 UTC »
Now with more data- Nov 19, 2016 1741 to Nov 23, 2016 1416

Danang and Capt Aghulas are invalid, but Upolu Point is probably good.

Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
5        879  258  259  286.0 100  Upolu Point, Hi                Hawaii               20.257   -155.885 6,285  266
6        748  199  200  299.0 200  Danang                         Vietnam              38.873   121.831  10,043 333
6        897  294  295  313.0 100  Kodiak, AK                     Alaska               57.621   -152.201 4,167  311
9        203  223  243  301.0 100  Cape Aghulas                   South Africa         -34.838  20.021   14,392 103
22       944  342  343  310.0 200  Cape Norman, NL                Canada               51.509   -55.831  2,842  62 
28       803  006  007  293.0 100  Moriches, NY                   United States        40.794   -72.756  1,743  98 
35       885  270  271  292.0 100  Cape Mendocino, CA             United States        40.447   -124.405 2,563  270
39       888  276  277  302.0 100  Whidbey Island, WA             United States        48.322   -122.706 2,249  290
44       939  326  327  295.0 200  Partridge Island, NB           Canada               45.239   -66.056  2,138  80 
54       906  306  307  300.0 200  Sandspit, BC                   Canada               53.242   -131.814 2,898  302
68       839  118  119  322.0 100  Youngstown, NY                 United States        43.239   -78.972  1,170  95 
100      909  300  301  309.0 200  Alert Bay, BC                  Canada               50.589   -126.93  2,554  296
101      942  340  341  288.0 200  Cape Ray, NL                   Canada               47.636   -59.241  2,621  71 
304      799  044  045  290.0 200  Penobscot, ME                  United States        44.453   -68.776  1,942  83 
316      919  308  309  306.0 200  Cardinal, ON                   Canada               44.783   -75.417  1,417  85 
592      907  304  305  320.0 200  Richmond, BC                   Canada               49.114   -123.183 2,283  292
839      886  272  273  287.0 100  Fort Stevens, OR               United States        46.208   -123.96  2,363  284
1099     881  262  263  302.0 100  Point Loma, CA                 United States        32.677   -117.25  2,462  244
1307     918  310  311  286.0 200  Wiarton, ON                    Canada               44.75    -81.117  971    87 
1562     891  282  283  295.0 100  Level Island, AK               Alaska               56.467   -133.098 3,014  309
2638     870  170  171  309.0 200  Reedy Point, DE                United States        39.569   -75.572  1,585  106
2862     847  058  059  301.0 200  Annapolis, MD                  United States        39.018   -76.61   1,538  110
3114     804  008  009  286.0 200  Sandy Hook, NJ                 United States        40.475   -74.02   1,659  101
3329     871  172  173  300.0 100  Appleton, WA                   United States        45.792   -121.332 2,168  282
3993     816  032  033  304.0 100  Aransas Pass, TX               United States        27.842   -97.065  1,936  191
5463     929  312  313  296.0 200  St Jean Richelieu, QC          Canada               45.324   -73.317  1,574  82 
5895     927  316  317  309.0 200  Lauzon, QC                     Canada               46.821   -71.165  1,729  75 
7008     764  210  211  314.0 200  Lincoln, CA                    United States        38.855   -121.361 2,395  263
9026     972  901  902  302.0 200  Miraflores                     Panama               8.993    -79.585  4,220  157
21090    809  018  019  289.0 100  Cape Canaveral, FL             United States        28.467   -80.554  2,162  144
33655    778  192  193  292.0 100  Kensington, SC                 United States        33.491   -79.349  1,759  132
38214    772  198  199  306.0 200  Acushnet, MA                   United States        41.749   -70.889  1,852  93 
39891    844  094  095  324.0 200  Hudson Falls, NY               United States        43.272   -73.542  1,595  90 
40737    808  016  017  314.0 200  Card Sound, FL                 United States        25.442   -80.452  2,468  147
60223    806  012  013  289.0 100  Driver, VA                     United States        36.963   -76.562  1,670  116
63034    836  112  113  292.0 200  Cheboygan, MI                  United States        45.656   -84.475  704    81 
88171    771  196  197  294.0 100  New Bern, NC                   United States        35.181   -77.059  1,765  123
91560    830  100  101  296.0 100  Wisconsin, Point WI            United States        46.708   -92.025  219    30 
111144   865  160  161  320.0 200  Millers Ferry, AL              United States        32.095   -87.397  1,528  158
117879   828  246  247  301.0 100  Angleton, TX                   United States        29.301   -95.484  1,756  187
152023   814  028  029  293.0 200  English Turn, LA               United States        29.886   -89.947  1,709  169
166539   838  116  117  319.0 200  Detroit, MI                    United States        42.306   -83.103  883    106
172513   827  244  245  312.0 200  Tampa, FL                      United States        27.85    -82.543  2,138  149
186603   869  168  169  290.0 200  Louisville, KY                 United States        38.018   -85.31   1,030  136
193797   831  102  103  298.0 100  Upper Keweenaw, MI             United States        47.233   -88.628  446    55 
271416   792  136  137  297.0 200  Bobo, MS                       United States        34.125   -90.696  1,233  168
290238   866  162  163  299.0 200  Sallisaw, OK                   United States        35.369   -94.817  1,078  187
366913   777  218  219  304.0 200  Mequon, WI                     United States        43.202   -88.066  474    113
389324   862  154  155  322.0 200  St Louis, MO                   United States        38.619   -89.764  773    156
392129   863  156  157  311.0 200  Rock Island IL                 United States        42.02    -90.231  421    141
397815   864  158  159  317.0 200  St Paul [Alma], MN             United States        44.306   -91.906  144    122


« Last Edit: November 23, 2016, 2227 UTC by skeezix »
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Offline ChrisSmolinski

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #3 on: November 23, 2016, 2218 UTC »
Nice catch getting Hawaii!
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Offline skeezix

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #4 on: November 23, 2016, 2236 UTC »
During this long stretch, I was surprised for Hawaii. My ALA1530S+ is N-S and according to the calculations from DGPS, Hawaii is at 266 deg from here, which puts it 94 degrees on the loop. This loop is around 30 dBm lower off the side. I'll take it. I did try putting the loop E-W a while back, but lots of noise. Can't remember where 286 kHz was with respect to the noise, but will be trying some things here.


Upolu Point, HI
Monday, November 21, 2016 10:07:15
Monday, November 21, 2016 10:07:17
Monday, November 21, 2016 10:07:25
Monday, November 21, 2016 10:07:27
Tuesday, November 22, 2016 09:00:13



Kodiak, AK
Tuesday, November 22, 2016 10:15:14
Tuesday, November 22, 2016 10:15:47
Tuesday, November 22, 2016 11:51:56
Tuesday, November 22, 2016 11:53:54
Tuesday, November 22, 2016 11:55:39
Tuesday, November 22, 2016 11:56:09


Once we get to the ones with at least double-digit decodes, those are all valid. Some nice stations in there too.

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Offline ChrisSmolinski

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #5 on: November 23, 2016, 2346 UTC »
I suspect there's lots of competing factors involved with getting the DGPS stations. Not only do you want a good signal from the desired station, but you don't want to get another station on the same frequency. This is where recording the entire night helps, you get those brief windows when the unwanted station fades out, bringing in decodes from the desired stations. It's interesting to see how much the results vary from night to night, even for just one station.

How directional is the ALA1530S down at 300 kHz?
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Offline skeezix

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Re: DGPS Logs Nov 19, 2016 1700 to Nov 21, 2016 0300
« Reply #6 on: November 24, 2016, 0044 UTC »
Did a rough measurement around 24 Nov 2016 UTC 0025 with the Perseus and Wellbrook ALA1530S+ on a TV rotor near ground level in a shed out in the back yard.

A local NDB station on 400 kHz (PPI) was about 30 dB between max & min.

On the DGPS stas around 300 kHz:
297 kHz (792, MS)
298 kHz (831, MI)
299 kHz (866, OK)
304 kHz (777, WI)
317 kHz (864, WI)

All except 831 were 30 dB. 831 was 20 dB. Roughly. 831 was noticeably less directional.

The method used for PPI was to put a marker on the carrier and tune for max/min.

Method for the DGPS stations was to watch visually for max & min. The signal is too wide and variable for using the marker as I did with PPI. While not precise, but I could easily tell within 5 dB (the difference of 831 of 20 dB vs the rest was clear).



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