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Author Topic: Pips Network up, multiple frequencies, Feb 07, 2014, 2217  (Read 1383 times)

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Pips Network up, multiple frequencies, Feb 07, 2014, 2217
« on: February 07, 2014, 2251 UTC »
The Pips Netowrk appears to be active right now, Feb 07, 2014, noticed at 2217 UTC.  Short pip every 6 seconds on multiple frequencies.

(edit)  Off at 2248:30 UTC, while I was writing this.

Freqs seen at first glance:
24050
22600
22450
22300
22000
21150
19300
18625
18450
18050
17975
17475
16725
16000
15550
15100
14400
13875
13325
13250
12025
11300
11225
11150
11025
10575
10050
9225
9050
8975
8825
8275
7700
6750
6725
6550
6225

That is all for now, I am sure I will find other freqs when I play back the recordings.

T!
T!
Mojave Desert, California USA

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Re: Pips Network up, multiple frequencies, Feb 07, 2014, 2217
« Reply #1 on: February 08, 2014, 1445 UTC »
Followup.

The pulse sent this time is the same as used Aug 26, 2013, Aug 03, 2013, Aug 02, 2013, Jul 28, 2013, and Jun 14, 2013.  It is a ~0.125 sec pulse sent every 6.0 seconds.

The frequencies used appear to be roughly the same list as those days also, allowing for some differences in what I could receive for propagation and QRM.  Some of the frequencies are in or under other signals.

After having gone over the spectrum recoprdings I have 11 more pulses / frequencies to add to the list I posted yesterday, this brings the total seen yesterday to 48.  Based on the 0.125 sec pulse sent every 6 seconds there are up to 48 possible pulses and frequencies in each network.  It would be tempting to say 48 is possible and I found 48, so that is all of them, but in reality I can tell there are 2 networks in uses in my recordings from yesterday (and almost every time Pips has been seen).  This means there are 96 possible pulses / frequencies.  We know that some frequencies are common to both networks, for example yesterday, as many times when this is seen, 11150 kHz had pulses from two different networks.  This means if every possible pulse is sent that the frequency list should be something less than 96 frequencies total, or 96 minus the number of double pulse freqs.

Additional frequencies found in recordings:

18675
18100
17950
17650
16550
16350
15625
15400
13500
13100
12450
11150  (second pulse found)

T!
T!
Mojave Desert, California USA

 


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