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January Meeting

WHEN: Monday, March 11, 2019
6:30 PM - Fellowship
7:00 PM - Meeting

WHERE: North Augusta Public Service Station #2
Five Notch Road
North Augusta, SC

TALK-IN: 146.730 Mhz (-) (Back on the air!)

Program: National Weather Service Skywarn Class

NWS Skywarn basic training will be given by John Quagliariello (NWS Meteorologist).
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Upcoming Events

March 18, 2019 - 6:00 PM - Aiken County ARES at Aiken Regional Medical Center in the Cafeteria.
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Emails

If you have not heard by now, we are migrating from the listserver at K4NAB.org to Groups.io. This will be the new way to receive updates, information, and meeting announcements. We will continue to send out the newsletter, but if you want to stay plugged into what is going on in the club and events between newsletter releases, you will need to sign up for the Groups.io list.

The old listserver will shut down shortly after Field Day in June.

To sign up, please visit https://groups.io/g/nabrc or send an email to nabrc+subscribe@groups.io to join.
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GPS Network May Experience Errors in "Week Number" Rollback

The GPS network will encounter a small millennium bug of its own in April when the network's "week number" rolls back to zero. This known issue especially could affect those who use GPS to obtain accurate Coordinated Universal Time (i.e., UTC). In the GPS network, the number of the current week is encoded into the message the GPS receives using a 10-bit field. This allows for weeks ranging from zero to 1023. The current period began on August 1, 1999. On April 6, 2019, the week number rolls over to zero and starts counting back up to 1023.

This should not affect later-model GPS receivers that conform to IS-GPS-200 and provide UTC, but testing carried out by the US Department for Homeland Security (DHS) raised the possibility that some units may misinterpret the rollover, shifting the date back to January 6, 1980, or possibly to another incorrect date. An affected GPS not only may report the incorrect date, but time accuracy that is critical to precise location data could be compromised. A nanosecond error in GPS time can equate to 1 foot of position (ranging) error, according to DHS-published guidelines that explain the issue and suggest how to address it.

From the ARRL Letter - March 7, 2019
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Submissions

If you have anything you would like included in the newsletter, please email club@k4nab.org with your submission. It can be an article about something Amateur Radio related or an upcoming Amateur Radio event.

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