[OKDXA] Propagation to Amsterdam Island DXpedition

[W5LE]

Roger,
Appreciate all your efforts and research.  Very interesting.
73, Gene



On 11/19/2013 8:16 PM, Roger Simpson wrote:
> John AF5CC [and other OKDXA members]:
>
> You asked about whether it is worth putting up a 15m beam to work the Amsterdam operation.
>
> My answer is YES, especially if you don’t have a beam for either 20, or 17m.
>
> FROM LAWTON OK:
>
> Latitude North 34.6375
> Longitude West 98.4375
>
> Short Path:  Azimuth = 135 deg;  Distance = 12130 miles    best openings on 20m, 17m, 15m
>
> Long Path:  Azimuth =  315 deg;  Distance = 12753 miles    best openings on 20m, and 15m (17m is “marginal”)
>
> The above calculations are from www.voacap.com
>
> Note: Normally propagation to any DX location in AS, EU, AF, SA, or OC is the “same” from anywhere in Oklahoma.
> However, this is NOT the case for Amsterdam Island because here in Oklahoma we are VERY CLOSE to being at the opposite side
> of the earth from Amsterdam. So the headings to Amsterdam vary a lot depending upon where you
> are in Oklahoma.  And since the headings vary – the path to Amsterdam is different – and thus the propagation is different.
>
> There is the only one DXCC location that is on the opposite side of the earth from somewhere in the lower 48 states of the USA.
> That DX location is Amsterdam Island. The place in the 48 states where the antipode to Amsterdam Island is located is in SE Colorado.
>
> This gives you an idea of how much difference there is in the headings for the short path to FT5ZM:
>
>    From Tulsa OK          110 degrees   short path
>    From Boise City OK   182 degrees   short path
>   
> I am going to publish beam headings from various places in Oklahoma to Amsterdam on this reflector in a few days. I will also give the exact coordinates
> of the antipode point which is in Southeast Colorado. And I’ll give you driving directions so you can visit the antipode location in Colorado up close and
> personal if you don’t mind a few dirt roads.
>
>
> 73  Roger   K5RKS
>
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