Whoa declination is very important. Wikipedia has a link to a NOAA calculator where you put in your ZIP code (or GPS coordinates), date, & tell it to compute your declination. Then you have to know how to calculate it.
Here's the link: http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp You WILL be several degress off if you don't adjust for it on your compass. ----- Original Message ----- From: Cameron Crum To: WISPA General List Sent: Tuesday, October 19, 2010 8:30 AM Subject: Re: [WISPA] PtP Dish Alignment You also need to make sure that the software is taking into account magnetic declination, or that you know what your declination is if it is giving azimuth from true north. If you don't know what declination is, look it up. Otherwise you'll be several degrees off. Cameron On Tue, Oct 19, 2010 at 10:26 AM, Greg Ihnen <[email protected]> wrote: It looks like for around $150 you could get binoculars with a built in magnetic compass that you see through the binoculars. Could you use the binoculars to find an object on the horizon on the right azimuth and then point the dish there? Greg On Oct 19, 2010, at 10:46 AM, Mark Nash wrote: Question: What tools do you use to blindly put up the first end of a ptp without having a visual on the other side? Details: When deploying ptp dishes... One team doing both ends at different times. The first dish must be aligned without a connecting radio at the other end. We know how to get uptilt/downtilt/azimuth from Radio Mobile. Uptilt/downtilt is easy to do with a simple gauge. Azimuth is a different story. If you can see the site that you're aiming for, no big deal, but what if you can't? We have a number of backhaul upgrades to do in the next few months, and we have alot of fog here in the mornings this time of year. -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ ------------------------------------------------------------------------------ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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