[AZ-Observing] Re: Messier Marathon Site Horizon Profile
- From: "Gene A. Lucas" <geneluca@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx, Rick Tejera <saguaroastro@xxxxxxx>
- Date: Wed, 15 Feb 2012 15:27:17 -0700
Hi Rick,
"For the sake of ..."
Would you give us the GPS coordinates you measured for the runway
intersection?
(Probably has been stated before on this list....) :>))
THX for the details...
Gene Lucas
On 2/15/2012 10:15, saguaroastro@xxxxxxx wrote:
> For the sake of completeness to the point of overkill, here is the
> methodology I used.
>
> Please note no GPS units were used for these calculations :)
> In Garmin MapSource Topo Software, I created a waypoint at the intersection
> of the runways. I used the Measurement tool to drag a line from the Observing
> site to the various peaks& saddles within 15 miles of the site. I can then
> get the distance,& bearing from the site and the elevation of the point.
>
> I entered this into a spreadsheet, calculated the Delta h between the two
> point in on column, converted the distance from miles to feet in a second
> column and did the 10th grade trig in the third.
>
> I had planned on using the data to create a horizon file for SkyMap pro, my
> planetarium software of choice, but given the level of precision in SkyMap is
> 1 degree, it seemed somewhat pointless.
>
> I do however have such a file for the Antennas Site, if anyone using SkyMap
> is interested. Given the proximity of the hills to the Southeast& South
> there, the horizon does come into play for low latitude objects.
> OmegaCentauri barely scrapes over the top of the rise to the immediate south
> from there.
>
> Rick
>
> ---- "David M. Douglass"<dmdouglass@xxxxxxxxxxxxxxx> wrote:
>> Tom and Rick...
>>
>> Is it safe to assume that the Azimuth's are stated relative to TRUE NORTH
>> and the Altitude is stated in Degrees ????
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