[amsat-bb] Proximity to grid line boundary

[Sean K.]

Hi Tom-
I helped overhaul the VUCC rules when I was at ARRL HQ.

This paragraph spells it out:

"Stations who claim to operate from more than one grid locator simultaneously (i.e., from the boundary between two grid locators or from the intersection of four grid locators) must be physically present in all locators to give multiple locator credit with a single contact. These stations should be prepared to validate their claim. For a mobile station, this means parking the vehicle exactly on the line or corner. For a portable station, this means that the total area occupied by the station's physical setup, including operating position(s), power source(s), and antenna(s), must occupy some portion of each of the two/four grid squares simultaneously. Operators of boundary/corner stations should be prepared to provide evidence of meeting the simultaneous occupation test if called upon to do so. Two photographs -- one showing the placement of the GPS receiver in the station setup, and a close-up legibly showing the GPS reading – are typically needed as evidence of compliance. Video footage showing an overview of the operating site and then, uncut and in real time, zooming in on the GPS display coordinates is even better."
Sean Kutzko Amateur Radio KX9XAMSAT Volunteer Coordinatorhttps://amsat.org/volunteer 

    On Saturday, August 29, 2020, 11:48:39 AM CDT, Don KB2YSI via AMSAT-BB <amsat-bb at amsat.org> wrote:  
 
 The VUCC rules (
http://www.arrl.org/files/file/Awards/VUCC%20Rules%20April%202020.pdf)
state:

(F) Grid boundary lines and grid corners must be established using a GPS
receiver whose map datum is set to WGS84, the global default for curif nt
GPS receivers. The GPS receiver should be set to use WAAS (Wide Area
Augmentation System) if so equipped, since this improves the error figure
to as little as 5 feet. In no case may the GPS receiver show an error
figure in excess of 20 feet. Any modern GPS receiver equipped with WAAS
will easily meet this requirement, as will most older
 units without WAAS.

On Sat, Aug 29, 2020, 12:37 Tom Schuessler, N5HYP via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> For my information, as I am not much of a rover, but  as I may be doing a
> little local grid rove sometime next weekend by request, how far from a
> grid
> boundary can you be for it to count?  I found a 4 corners grid boundary in
> my area, but it is way rural in a deep clump of vegetation with a dirt road
> a couple hundred feet away.  What is the maximum deviation from an X
> .000000; Y.000000 location for it to be legal as a 4 grid location?  I will
> probably do a much easier 2 grid line location, but just wondering.
>
> Thanks much.
>
> Tom Schuessler, N5HYP
> EM12ms
>
>
>
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