DGPS Logs Jul 4, 2017 UTC 2334 - Jul 5, 2017 UTC 2340 (AFE822x)

[skeezix]

Pretty bad night.


Cape Mendocino
Wednesday, July 5, 2017 10:11:32

Fort Stevens
Wednesday, July 5, 2017 10:24:59
Wednesday, July 5, 2017 10:28:05
Wednesday, July 5, 2017 10:34:37
Wednesday, July 5, 2017 10:41:42

Penobscot
Wednesday, July 5, 2017 06:32:43
Wednesday, July 5, 2017 08:11:42
Wednesday, July 5, 2017 08:11:52

Acushnet
Wednesday, July 5, 2017 06:23:59

Kensington
Wednesday, July 5, 2017 02:14:03
Wednesday, July 5, 2017 02:57:17
Wednesday, July 5, 2017 03:05:36

Angleton
Wednesday, July 5, 2017 09:42:36

Moriches
Wednesday, July 5, 2017 02:36:07
Wednesday, July 5, 2017 02:36:16
Wednesday, July 5, 2017 02:37:35
Wednesday, July 5, 2017 02:38:33
Wednesday, July 5, 2017 02:38:42
Wednesday, July 5, 2017 02:39:00
Wednesday, July 5, 2017 02:39:25
Wednesday, July 5, 2017 02:39:34
Wednesday, July 5, 2017 07:27:10

Sandy Hook
Wednesday, July 5, 2017 07:21:01

Annapolis
Wednesday, July 5, 2017 02:36:54
Wednesday, July 5, 2017 02:37:06
Wednesday, July 5, 2017 02:39:05
Wednesday, July 5, 2017 07:48:58
Wednesday, July 5, 2017 08:13:44

Wiarton
Wednesday, July 5, 2017 07:12:13
Wednesday, July 5, 2017 07:12:43
Wednesday, July 5, 2017 07:36:29


Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
1        885  270  271  292.0 100  Cape Mendocino, CA             United States        40.447   -124.405 2,563  270
4        886  272  273  287.0 100  Fort Stevens, OR               United States        46.208   -123.96  2,363  284
77       907  304  305  320.0 200  Richmond, BC                   Canada               49.114   -123.183 2,283  292
1404     871  172  173  300.0 100  Appleton, WA                   United States        45.792   -121.332 2,168  282
24       827  244  245  312.0 200  Tampa, FL                      United States        27.85    -82.543  2,138  149
3        799  044  045  290.0 200  Penobscot, ME                  United States        44.453   -68.776  1,942  83  
1        772  198  199  306.0 200  Acushnet, MA                   United States        41.749   -70.889  1,852  93  
371      771  196  197  294.0 100  New Bern, NC                   United States        35.181   -77.059  1,765  123
3        778  192  193  292.0 100  Kensington, SC                 United States        33.491   -79.349  1,759  132
1        828  246  247  301.0 100  Angleton, TX                   United States        29.301   -95.484  1,756  187
9        803  006  007  293.0 100  Moriches, NY                   United States        40.794   -72.756  1,743  98  
209      806  012  013  289.0 100  Driver, VA                     United States        36.963   -76.562  1,670  116
1        804  008  009  286.0 200  Sandy Hook, NJ                 United States        40.475   -74.02   1,659  101
200      844  094  095  324.0 200  Hudson Falls, NY               United States        43.272   -73.542  1,595  90  
5        847  058  059  301.0 200  Annapolis, MD                  United States        39.018   -76.61   1,538  110
1116     792  136  137  297.0 200  Bobo, MS                       United States        34.125   -90.696  1,233  168
133      839  118  119  322.0 100  Youngstown, NY                 United States        43.239   -78.972  1,170  95  
3        918  310  311  286.0 200  Wiarton, ON                    Canada               44.75    -81.117  971    87  
283      838  116  117  319.0 200  Detroit, MI                    United States        42.306   -83.103  883    106
109      836  112  113  292.0 200  Cheboygan, MI                  United States        45.656   -84.475  704    81  
42117    777  218  219  304.0 200  Mequon, WI                     United States        43.202   -88.066  474    113
16492    831  102  103  298.0 100  Upper Keweenaw, MI             United States        47.233   -88.628  446    55  
32257    830  100  101  296.0 100  Wisconsin, Point WI            United States        46.708   -92.025  219    30  






CURRENT DGPS ADVISORIES FOR 05 Jul 2017

Site Name    Site Id    BNM #    OUTAGE MESSAGE

SCHEDULED / UNSCHEDULED OUTAGES

Lincoln   764   0242-17   
BROADCAST SITE IS UNUSABLE AS OF 06/22/2017 18:44 Z UNTIL FURTHER NOTICE.

Lincoln   764   0234-17   
BROADCAST SITE WILL BE UNUSABLE FROM 07/13/2017 16:00 Z TO 07/13/2017 18:00 Z.

Upolu Point   879   0238-17   
BROADCAST SITE WILL BE UNUSABLE FROM 07/05/2017 18:00 Z TO 07/06/2017 00:00 Z.

Tampa (Macdill)   827   0227-17   
BROADCAST SITE STATUS IS UNCONFIRMED DUE TO NETWORK OUTAGE AS OF 06/13/2017 08:20 Z UNTIL FURTHER NOTICE.

Hudson Falls   844   0250-17   
BROADCAST SITE STATUS IS UNCONFIRMED DUE TO NETWORK OUTAGE AS OF 07/03/2017 21:39 Z UNTIL FURTHER NOTICE.


GENERAL INFORMATION

Reedy Point   870   0204-17   
DGPS BROADCAST SITE WILL PERMANENTLY CEASE BROADCASTING CORRECTIONS ON 31 JULY 2017 AT 1400Z


Note: The Louisville, KY DGPS Beacon (290 KHZ, Site ID 869) was terminated as of 1200Z (0800 EDT) May 31, 2017.

The Millers Ferry, AL (320 KHz, Site ID 865), Rock Island, IL (311 KHz, Site ID 863), and St. Paul, MN (317KHz, Site ID 864) DGPS beacon signals were terminated as of 1200Z (0800 EDT) June 30, 2017.




_{AFE822x v2.0 SDR with 43' Wellbrook ALA100LN loop oriented E-W}

[ChrisSmolinski]

Now I don't feel so bad. I need a relatively storm free night (yeah, in July, good luck with that) to see if the band pass filter improves decodes. 

Actually I need to run two SDRs at the same time, one with the filtered output and one without.

Actually, I would need to first characterize the two SDRs to make sure they behave the same, with the same antenna input.

I may just assume the filter helps 

[skeezix]

This is science! Questions are meant to be answered. 

Have you noticed if your 10 MHz reference hooked up to the SDR helps with decodes?

[ChrisSmolinski]

I don't record DGPS on the netSDR with the reference, although that would be an interesting experiment (with and without the reference). I am not sure what the actual frequency accuracy of a typical DGPS transmitter is, probably pretty good. I know the AFEDRI drifts a few Hz over time. Right now it reads 10 MHz WWV low by 8.6 Hz. But once you get down to the DGPS band that becomes negligible, 0.258 Hz at 300 kHz. That's the frequency error due to the sample rate error, you also have the data bits getting skewed over time, although that should be very negligible unless you have a horrific SDR, like an RTL dongle.