According to a Spaceweather.com report, Scott Tilley, VE7TIL, in British Columbia, Canada, received a signal from the NASA Mars Reconnaissance Orbiter (MRO), flying just 274 kilometers (about 170 miles) above the red planet’s surface. The signal was an X-band carrier containing no data or telemetry.
“Its purpose is to allow for Doppler tracking,” Tilley explained. “The rapid change in pitch of the signal is caused by the relative motion of the satellite and the observer.” He used a homemade satellite dish to hear the orbiter.
Tilley enjoys tracking down signals from “dead” satellites, zombie satellites, and spy satellites, but the MRO was a first for him. “MRO’s signal is weak, but it is one of the louder signals in Mars orbit,” he said. “The spacecraft has a large dish antenna it uses as a relay for other Mars missions. With the proximity of Mars these days, it was the perfect time to try.”
In 2018, Tilley saw the “signature” of the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE), a NASA spacecraft believed to have died in 2005. That discovery delighted space scientists.
Jim makes and then shows his tunable half wavelength dipole antenna. Using an antenna analyzer, Jim finds the resonant frequency and the lowest SWR do... Read more
Nick, KC3PWJ, has a flagpole and also a pole that holds up his VHF/UHF discone. He’d like to string a 20m dipole between the two poles, but is w... Read more
In this video I show a article from QST magazine that is from April 1993 on how to build a 2 meter Yagi for 7 bucks. QST ARTICLE Read more
QYT KT-8900D Dual Band Quad-standby Colorful Screen Mini Mobile Vehicle-mounted Radio TX & RX 136-174MHz & 400-480MHz 200 Channels FM Radio Fe... Read more
Built by popular demand, the DX Engineering Ladder Line Surge Protector is ready to be placed in line with your balanced feedline antenna system! For... Read more
The US Department of Defense will host this year’s Armed Forces Day (AFD) Cross-Band Test on Saturday, May 14. While Armed Forces Day is May 21, the A... Read more
In this video I show different antennas including Hamsticks to have an economical way to get on the Ham Bands. Hamsticks are mono band HF antennas tha... Read more
Posted by Wayne KE8JFW WiMo of Herxheim, Germany, has appointed DX Engineering as the sole North American distributor of contesting and DXi... Read more