[Canberrauav] Spectrum Goodies Stephen Dade stephen_dade at hotmail.com Wed May 30 21:57:52 EST 2012 Hi all, In an effort to avoid the "Kingaroy Triangle" of spectrum interference. I've trawled the ACMA databases for a listing of all radiocommunications transmitters within 50km of Kingaroy. The resulting Excel files have been put up on Google docs: 1GHz - 6 GHz https://docs.google.com/open?id=0BxJBg_6KSZ5zTGFMNnhGdVFqeTg 30MHz - 1 GHz https://docs.google.com/open?id=0BxJBg_6KSZ5zWTRmSGVoZS1qeU0 Everything https://docs.google.com/open?id=0BxJBg_6KSZ5zUzVUbWtOcU9MRjQ Mobile phone towers https://docs.google.com/open?id=0BxJBg_6KSZ5zeWMwRm5sc3Z5VzQ I've also mapped them to Google Earth (kml) files for a more visual view: 1GHz - 6 GHz https://docs.google.com/open?id=0BxJBg_6KSZ5zMHJtOTQwb012eWc 30MHz - 1 GHz https://docs.google.com/open?id=0BxJBg_6KSZ5za1dyeUJ0eXVwakk Everything https://docs.google.com/open?id=0BxJBg_6KSZ5zai1oeGxQeWVuYVE Mobile phone towers https://docs.google.com/open?id=0BxJBg_6KSZ5zeHJxbDMzWHFtZzA There's the OBC map too https://docs.google.com/open?id=0BxJBg_6KSZ5zOHR2Y1A0NGlOWnM (note this isn't the one the organisers provided. I made this one myself from the coordinates in The Rules Document) One thing to note is that Optus has a mobile phone tower operating 2km from the search area (and 700m from the competition boundary). It operates in the 935 - 960 MHz band. I'm wondering if it may (unintentionally) interfere with our 900 MHz link, like what happened at Mt Pleasant on the weekend - it may be something worth testing. The flipside of this it that it's viable to use a (900 MHz band) GSM/3G modem on the UAV, should we wish to. I've confirmed that it's a 2G/3G tower. Other than that, there's 2 fixed links running through the competition boundaries: One at 1.9GHz and another at 460 MHz. There's also 2 navigation beacons operating at the airport: 125MHz and 207 kHz. I don't see any of these links affecting the current radios on the UAV. [Any other teams lurking on this mailing list are most welcome to use this data too!] Thanks Stephen
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