Last night was a great night for DGPS. I heard not just one, but two stations from Alaska. I also got significantly above average decode rates for various west coast stations. I notice the DST index was positive last night, which is supposedly quite favorable for longwave propagation. All decodes with my Amalgamated DGPS software, an AFE822x dual channel SDR, 500 ft longwire/beverage, with a homebrew low pass filter that cuts off above 400 kHz or so.
I’m presenting the data in a few lists. First, at the top, are those decodes that are questionable. I’ve deleted those that I am sure are bogus.
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
1 001 463 001 310.0 100 Canivete Brazil 0.516 -50.424 5,120 142
1 001 467 001 305.0 100 Cabo Calchanhar Lt Brazil -5.169 -35.489 6,548 130
1 454 715 716 287.5 100 Torshavn Faroes 62.023 -6.841 5,183 37
1 908 302 303 315.0 200 Tofino [Amphitrite Point], BC Canada 48.931 -125.545 3,928 302
1 324 448 449 307.0 200 Mersa Martruh Egypt 31.365 27.256 8,911 57
2 343 486 487 287.5 200 Porto Santo Madeira 33.067 -16.35 5,372 78
4 907 304 305 320.0 200 Richmond, BC Canada 49.114 -123.183 3,755 302
10 643 686 687 309.0 200 Ken Saki Japan 35.142 139.685 10,885 330 Some of them, like Madeira and Richmond BC I have received in the past. Others seem plausible, but obviously with so few decodes it is impossible to confirm them, I present them more for the “hmmm…” factor.
The decodes from Ken Saki Japan are interesting. Below are the timestamps. Obviously the early ones are bogus decodes, as they were received while it was still daytime in Japan. But there is an interesting cluster of three messages received within one minute of each other, at 0758-0759 UTC. It seems very unlikely to me that you would get exactly the correct bit errors on three messages in such a short time period, such that they would appear to be from another station, and yet also pass the tests on the checksum and ZCount time. Still not enough to confirm reception, but more than enough for a consideration. As we get further into winter, it will be interesting to see if it appears again, with even mode decodes.
Sunday, November 20, 2016 23:52:42
Monday, November 21, 2016 00:08:25
Monday, November 21, 2016 05:05:05
Monday, November 21, 2016 06:12:37
Monday, November 21, 2016 07:07:17
Monday, November 21, 2016 07:58:40
Monday, November 21, 2016 07:58:50
Monday, November 21, 2016 07:59:28
Monday, November 21, 2016 08:04:07
Monday, November 21, 2016 09:48:41And now the rest of the stations, including two from Alaska:
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
12 890 280 281 305.0 100 Biorka, AK Alaska 56.858 -135.546 4,566 315
14 936 332 333 319.0 200 Point Escuminac, NB Canada 47.075 -64.8 1,277 46
19 830 100 101 296.0 100 Wisconsin, Point WI United States 46.708 -92.025 1,446 308
31 816 032 033 304.0 100 Aransas Pass, TX United States 27.842 -97.065 2,271 241
40 891 282 283 295.0 100 Level Island, AK Alaska 56.467 -133.098 4,416 314
60 906 306 307 300.0 200 Sandspit, BC Canada 53.242 -131.814 4,341 309
62 828 246 247 301.0 100 Angleton, TX United States 29.301 -95.484 2,048 241
136 919 308 309 306.0 200 Cardinal, ON Canada 44.783 -75.417 579 12
152 888 276 277 302.0 100 Whidbey Island, WA United States 48.322 -122.706 3,723 300
205 918 310 311 286.0 200 Wiarton, ON Canada 44.75 -81.117 658 330
394 937 330 331 298.0 200 Hartlen Point, NS Canada 44.583 -63.45 1,236 60
500 836 112 113 292.0 200 Cheboygan, MI United States 45.656 -84.475 903 320
688 871 172 173 300.0 100 Appleton, WA United States 45.792 -121.332 3,639 296
712 972 901 902 302.0 200 Miraflores Panama 8.993 -79.585 3,425 185
795 934 336 337 307.0 200 Fox Island, NS Canada 45.361 -61.097 1,440 59
981 814 028 029 293.0 200 English Turn, LA United States 29.886 -89.947 1,609 231
1094 940 338 339 315.0 200 Cape Race, NL Canada 46.661 -53.075 2,075 60
1181 809 018 019 289.0 100 Cape Canaveral, FL United States 28.467 -80.554 1,292 196
1244 886 272 273 287.0 100 Fort Stevens, OR United States 46.208 -123.96 3,836 297
1393 764 210 211 314.0 200 Lincoln, CA United States 38.855 -121.361 3,784 283
1419 927 316 317 309.0 200 Lauzon, QC Canada 46.821 -71.165 919 29
1467 881 262 263 302.0 100 Point Loma, CA United States 32.677 -117.25 3,668 271
2538 935 334 335 312.0 200 Western Head, NS Canada 43.993 -64.67 1,122 61
3273 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 428 337
6209 944 342 343 310.0 200 Cape Norman, NL Canada 51.509 -55.831 2,090 44
10459 869 168 169 290.0 200 Louisville, KY United States 38.018 -85.31 747 258
11211 925 320 321 313.0 200 Moise, QC Canada 50.202 -66.119 1,443 32
18820 939 326 327 295.0 200 Partridge Island, NB Canada 45.239 -66.056 1,084 52
21879 831 102 103 298.0 100 Upper Keweenaw, MI United States 47.233 -88.628 1,258 316
21895 942 340 341 288.0 200 Cape Ray, NL Canada 47.636 -59.241 1,670 52
24360 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 306 174
25923 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 376 70
26573 799 044 045 290.0 200 Penobscot, ME United States 44.453 -68.776 856 49
26640 926 318 319 300.0 200 Riviere du Loop, QC Canada 47.762 -69.606 1,072 31
26745 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
27280 864 158 159 317.0 200 St Paul [Alma], MN United States 44.306 -91.906 1,335 297
27286 865 160 161 320.0 200 Millers Ferry, AL United States 32.095 -87.397 1,264 231
28304 771 196 197 294.0 100 New Bern, NC United States 35.181 -77.059 503 181
31731 827 244 245 312.0 200 Tampa, FL United States 27.85 -82.543 1,415 203
34409 866 162 163 299.0 200 Sallisaw, OK United States 35.369 -94.817 1,644 259
34902 862 154 155 322.0 200 St Louis, MO United States 38.619 -89.764 1,110 268
35267 808 016 017 314.0 200 Card Sound, FL United States 25.442 -80.452 1,619 193
39602 870 170 171 309.0 200 Reedy Point, DE United States 39.569 -75.572 119 97
41146 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
45112 863 156 157 311.0 200 Rock Island IL United States 42.02 -90.231 1,145 287
45589 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 264 70
45831 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 592 301
46356 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 559 64
47098 777 218 219 304.0 200 Mequon, WI United States 43.202 -88.066 1,004 296
47219 847 058 059 301.0 200 Annapolis, MD United States 39.018 -76.61 81 159
47446 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 488 34
47967 792 136 137 297.0 200 Bobo, MS United States 34.125 -90.696 1,368 247 Chris Smolinski
Westminster, MD
Black Cat Systems
http://www.blackcatsystems.com
Topic: Finally, Alaska on DGPS! DGPS Logs 20 Nov 2016 (Read 1140 times)
