Hello guys, I need to do long range Surveillance (with Real Time Video Tx.) about 20-30 km within hills and mountain area. So this is a BLOS mission. Unfortunately in that area there is no internet/cellular signal available. To my knowledge the proper way is to use 1.2GHz Video TX with 5-10watts power output (or using expensive digital VTX system). But I read somewhere that this 1.2GHz strong signal from the VTX will interfere GPS reception. Anybody can advise me how is the best way to do this is?? Thank you.