![]() After desoldering, the IN and OUT pads are bridged together. The actual antenna circuit is hiding under the reflector. The filter is typically the largest component on the board. Then a metal reflector needs to be removed from the bottom of the antenna using a soldering iron. To remove the filter, the plastic case must first be removed. A typical GPS antenna will be tuned for 1575 MHz and will contain a band pass filter that prevents the antenna from picking up signals 1-2MHz away from that frequency. He admits that it’s not the best antenna for this, but it will get the job done. If you don’t want to fork over the money for something that fancy, he also explains how you can modify a $10 GPS antenna to work for this purpose. Hacked GPS antennaĪs far as antennas go, recommends a dish or helix antenna. Since these satellites are geostationary, he won’t have to move his antenna once it’s pointed in the right direction. Once all of the gear was collected, used an Android app called Satellite AR to locate his nearest Inmarsat satellite. Not much equipment is required for this, just the RTL-SDR dongle, an antenna, a computer, and the cables to hook them all up together. This channel contains Enhanced Group Call (EGC) messages which include information such as search and rescue, coast guard, weather, and more. STD-C is a text message communications channel used mostly by maritime operators. They provide communications all over the world to places that do not have a reliable terrestrial communications network. Just found a yet another use for the RTL-SDR. He’s been decoding Inmarsat STD-C EGC messages with it. Inmarsat is a British satellite telecommunications company. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |