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FEATURE Satellite Installation iPhone, iPad and iPod Apps for Antenna Alignment, or: How your smartphone turns into a great tool for DXers and installers Thomas Haring Smartphones are currently turning our mobile world upside down and have conquered large segments of the consumer market. They allow us to not only stay in touch through conventional phone calls but also to check our mail, hook up to the Internet, stay up to date on social networking platforms like Twitter and Facebook, listen to music, shoot photos and help us with all sorts of everyday tasks. Yet, smartphones can also be used in the professional realm – to help with the installation of satellite antennas, for example. If we look at all the shiny smartphones on offer these days there is one particular kind that seems to ride a gigantic wave of success: Of course we’re talking about the Apple iPhone which – in combination with the iTunes store – offers a wealth of additional applications (socalled apps) to pimp it up. TELE-satellite has looked at a range of apps that might be handy with regard to satellite reception. DishPointer Compass and DishPointer Maps Some issues ago we introduced apps from DishPointer (TELE-satellite issues 02-03/2008 and 12-01/2010) and obviously they are featured in this overview as well. Both apps specifically deal with satellite antenna installation and alignment and they start out with determining the current location with the help of the iPhone’s buit-in GPS receiver. Next, you enter the satellite position you’d like to receive and the app then calculates azimuth, elevation and skew parameters. In theory, these values are all you ever need to correctly set up your dish, and most antennas feature a small scale to help you find the correct position. But if you don’t have a compass at our disposal there’s one answer you still need to find, even though the azimuth angle is known: In which horizontal direction do you need to move the antenna? The DishPointer Maps app provides the answer by looking up data from Google Maps. On the phone’s display you see your location and its surroundings in map view, satellite view or hybrid view combining both, with an arrow clearly indicating which way your satellite antenna should 120 TELE-satellite — Global Digital TV Magazine — 12-01/2011 — www.TELE-satellite.com ■ DishPointer Compass superimposes the Clarke Belt on the camera to create augmented reality point. Comparing certain striking points on Google Maps with their real-world counterparts quickly lets you achieve a rough alignment of your antenna. Another aspect that needs to be addressed – preferably BEFORE starting with the actual installation job – is evaluating the local environment. DishPointer Compass comes into play now as it finds out whether or not a desired satellite position can be received at the actual location and which reception range a motorised antenna is able to cover. Perhaps there are trees, buildings or other obstructions in the way of perfect reception? After all, it’s of no use to do all the tricky work and mount an antenna only to find out afterwards that the signals you’re looking for don’t reach the LNB. With DishPointer Compass it’s easy to avoid such disappointment. It let’s you know which satellites can be received at
www.TELE-satellite.com — 12-01/2011 — TELE-satellite — Global Digital TV Magazine 121
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