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Utility Listening - Discussions regarding monitoring government, military, aircraft, ship, and other misc communications in the HF/MW/LF bands.

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  #81 (permalink)  
Old 10-01-2018, 9:41 PM
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There's so many conservatives out there that simply place WWV in the redundancy department and want to see it dismantled so they have less taxes to pay.

The only thing about GPS that is "self-redundant" is that there are multiple GPS satellites out there that are independent of each other. Destroying all of them at the same time, including the ones on the other side of the Earth is unlikely (or we have a bigger problem on our hands.)
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Old 10-02-2018, 8:14 AM
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Originally Posted by needairtime View Post
There's so many conservatives out there that simply place WWV in the redundancy department and want to see it dismantled so they have less taxes to pay.

The only thing about GPS that is "self-redundant" is that there are multiple GPS satellites out there that are independent of each other. Destroying all of them at the same time, including the ones on the other side of the Earth is unlikely (or we have a bigger problem on our hands.)
I don't think it's "conservatives." Rather, it's simply people who have no knowledge of the impact of both the satellite and radio systems.
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Old 10-11-2018, 3:32 PM
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They cannot. Countless atomic clocks and wristwatches (i.e. Casio G-SHOCK) rely on the WWVB signal.

Exactly. And, not everyone utilizes GPS, and even GPS isn't reliable- the signal WE as regular citizens receive is inexact and out of sync. Even police depts GPS has a time delay... I know this just from listening to scanner traffic.
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Old 10-12-2018, 7:00 AM
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I did not go through all of the pages to see if this had been mentioned before but, 31 October 2018 is when WWV and WWVH will go silent per this announcement:

https://www.nist.gov/pml/time-and-fr...o-stations/wwv

I had also contacted the director of public information for NIST and they told me that WWVB (the 60 kHz time signal for wrist watches, "atomic" clocks, etc.) will also be shut down under the current plans.

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Old 10-12-2018, 7:03 AM
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I did not go through all of the pages to see if this had been mentioned before but, 31 October 2018 is when WWV and WWVH will go silent per this announcement:

https://www.nist.gov/pml/time-and-fr...o-stations/wwv
No, that is not correct. That is ONLY the Marine announcements that are generated by NWS and re-transmitted by NIST.

Quoting from tha that page:
"The National Weather Service Marine Storm Warning announcements, broadcast on WWV and WWVH since 1971 will be discontinued after October 31, 2018. Comments or questions about this change should be directed to the National Weather Service at..."
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Old 10-12-2018, 7:07 AM
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Originally Posted by fleef View Post
Even police depts GPS has a time delay... I know this just from listening to scanner traffic.
I think that delay you refer to is more due to the reporting cycle of their AVL, or the software involved. Not the actual GPS signal being received at the vehicle.

The way AVL (automatic vehicle location) works is that the GPS signal is received at the car, either with an application on the in-car computer or a dedicated device, and then is processed and transmitted through cellular or radio to the dispatch or system as a location point. This can occur on a regular basis (e.g. every 2 minutes), on demand (polling), or when something changes (the vehicles lights and siren are turned on or a set speed is exceeded).
Depending on how that is setup, how often it reports, and how fast the vehicle is moving, that can cause the reported location to be out of sync with the real location. (e.g. if it reports only once every five minutes, and the car is driving 80 miles an hour, that is a big difference after 4 minutes and 50 seconds).
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Old 10-12-2018, 7:07 AM
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Quote:
Originally Posted by Thunderknight View Post
No, that is not correct. That is ONLY the Marine announcements that are generated by NWS and re-transmitted by NIST.

Quoting from tha that page:
"The National Weather Service Marine Storm Warning announcements, broadcast on WWV and WWVH since 1971 will be discontinued after October 31, 2018. Comments or questions about this change should be directed to the National Weather Service at..."
Oh OK then. My mistake then. But the PIO for NIST must not have understood my question then because I had asked this very question about the time signals. I'll have to contact them again and seek a clarification to my eMail and their response. Thanks for the comment! Dave
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