https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202346374
Here is the paper, it has free access which is nice. Most of this went over my head but the conclusions are well written. Basically they were able to detect broadband and narrow band emissions from the satellites as they passed by that were outside of their assigned range. Some of the frequencies they attributed (or at least speculated) to ground based transmissions reflected off them and they are asking regulators to consider these reflected emissions in addition to EMI coming from the craft itself. Cool stuff, but my favorite part is that they think there is a 25MHz oscillator on them because they detected a harmonic series with 25MHz as the base. Are you serious??!? how cool is that? 25MHz isn’t even in the range they were scanning and they figured it out anyway. So from earth, they were able to detect the faintest signal from some onboard microcontroller just doing its job, not even being a radio device, just ticking away at its designed clock speed. I use arch linux btw.
https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202346374 Here is the paper, it has free access which is nice. Most of this went over my head but the conclusions are well written. Basically they were able to detect broadband and narrow band emissions from the satellites as they passed by that were outside of their assigned range. Some of the frequencies they attributed (or at least speculated) to ground based transmissions reflected off them and they are asking regulators to consider these reflected emissions in addition to EMI coming from the craft itself. Cool stuff, but my favorite part is that they think there is a 25MHz oscillator on them because they detected a harmonic series with 25MHz as the base. Are you serious??!? how cool is that? 25MHz isn’t even in the range they were scanning and they figured it out anyway. So from earth, they were able to detect the faintest signal from some onboard microcontroller just doing its job, not even being a radio device, just ticking away at its designed clock speed. I use arch linux btw.
👍