Amateur Radio Satellite Communications: A Comprehensive Guide

Amateur radio satellite communications represent one of the most fascinating aspects of the hobby, combining radio technology, space science, and global connectivity. Since the launch of OSCAR 1 (Orbiting Satellite Carrying Amateur Radio) in 1961, radio amateurs worldwide have been communicating through an ever-evolving fleet of satellites, pushing the boundaries of what’s possible with relatively modest equipment.

How Amateur Radio Satellite Communications Work

At its core, satellite communication involves transmitting radio signals to a satellite in orbit, which then retransmits these signals back to Earth. However, the technical details make this seemingly simple concept both challenging and rewarding.

CT1ETE 🛰 Feb 14

Yesterday, I was lucky enough to have worked Adam K0FFY, operating portable in US Virgin Islands as KP2/K0FFY, using RS-44 satellite. This is a nice QSO for me as I operate from my home with an X-30 vertical antenna from Diamond, which is a challenge due to extreme fading and weak signals.

Thanks Adam!

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I am really happy to have worked @K0FFY_Radio Adam in FK77 with my X30 antenna. "That's one small step for man, one giant leap for mankind." #amsat #hamradio pic.twitter.com/3mWPyAp9cc

Recently, I took a short excursion through the city of Guimarães with the objective of conducting a brief APRS test using my Kenwood TH-D75. The purpose of this test was to map the coverage areas of the Braga digipeater, CQ0PBR, which is installed on Mount Santa Marta at an elevation of 562 meters ASL.

Aware from the outset that the antenna is not yet in its final location due to certain technical constraints, I was fully conscious that, in lower and more obstructed areas without a direct line of sight to the digipeater, it would be exceedingly difficult for my packet to be relayed.

CT1ETE 🛰 May 2

I started my HF Robust Packet experiments with my friend CT2IWW, Paulo.

Since I don’t have a TNC, I chose to use the WinRPR software, which emulates an SCS TNC (discontinued) and can be used with a sound card. In my case, I am operating with a Flex 6400M and I use Flexradio’s CAT and DAX system to receive and transmit. APRS software used was APRSIS32.

My first tests were carried out successfully in the 80 meter band.

CT1ETE 🛰 Apr 29

I love Antarctica 😍 #hamradio #Antarctica

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DP0GVN @ Neumayer Station III
I've been waiting a long time for this moment and today I was able to make it. I am a huge fan of Antarctica and I collect as much stations as possible #amsat #qo100 pic.twitter.com/QI1bOHkOXv

— CT1ETE 🛰 (@CT1ETE) November 22, 2024

CT1ETE 🛰 Apr 25

Two grids (IJ23 & IJ24) today, with DP0POL/MM, operated by Felix DL5XL. Great operator and always keen to a good conversation after the pileups. #amsat @amsatdl #hamradio #qo100

Watch DP0POL/MM in action via QO-100 Satellite

CT1ETE 🛰 Apr 14

I made radio contact with cosmonaut Alexander Grebenkin, aboard the International Space Station, during the Yuri Gagarin International Contest #rs0iss #iss #space #hamradio #amsat https://t.co/b6UBKM3HmP pic.twitter.com/4rjjnFfb2N

— CT1ETE 🛰 (@CT1ETE) April 14, 2024