Re: Two hundred 437 MHz satallites launch March 16 + WebSDR
"Keep in mind that the downlink is not effected by usa rules...."
This may be true if the owner of the satellite is not licensed in the USA or it is operating on some service other than the Amateur Radio Service. ITU recommends policy, it doesn't make or enforce law as I understand it.
Before this gets too much further into the weeds, the purpose of my original post was to bring awareness that satcom is regulated by cooperative national authorities and is not the "wild west" of radio spectrum. This is true whether it is an amateur of commercial satellite regardless of size. Just because you can build it and get it launched does not mean it is legal. We all have a responsibility to be vigilant. I don't think too many people would intentionally put up a satellite in violation of the rule of law, but it is a complex issue. It never hurts to ask a question.
- Howie AB2S
This may be true if the owner of the satellite is not licensed in the USA or it is operating on some service other than the Amateur Radio Service. ITU recommends policy, it doesn't make or enforce law as I understand it.
Judging from the number issued in recent years the FCC seem happy to issue experimental licenses for satellites in 144/435/2400 including the use of emission types that aren't covered by existing FCC amateur radio regulations.
AggieSat4's 153.6 kbps 4 watt 436 MHz downlink using ITU Emission Designation 406KF7DBN might breach the bandwidth limits of an amateur license, its 406 kHz B/W comfortably exceeding the FCC 100 kHz limit on the band, but FCC were okay with issuing an experimental license for it.
As I read the FCC amateur regs emission spread spectrum emission modes such as CDMA can be used on all amateur bands as long as ITU emission designation symbols 2 and 3 are not both X. Such XX modes are designated by FCC as "SS" and only permitted above 420 MHz.
73 Trevor M5AKA
I am glad that the FCC considered this and granted the experimental license. You can simulate for all eternity but nothing replaces a real world test. By obtaining an FCC experimental license, the application with initial descriptive details become public record. The licensee then has the option of sharing with the amateur community or not.
- Howie AB2S
Date: Tue, 11 Mar 2014 22:14:33 +0000 From: [email protected] Subject: Re: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16 + WebSDR To: [email protected]; [email protected]
This may be true if the owner of the satellite is not licensed in the USA or it is operating on some service other than the Amateur Radio Service. ITU recommends policy, it doesn't make or enforce law as I understand it.
Judging from the number issued in recent years the FCC seem happy to issue experimental licenses for satellites in 144/435/2400 including the use of emission types that aren't covered by existing FCC amateur radio regulations.
AggieSat4's 153.6 kbps 4 watt 436 MHz downlink using ITU Emission Designation 406KF7DBN might breach the bandwidth limits of an amateur license, its 406 kHz B/W comfortably exceeding the FCC 100 kHz limit on the band, but FCC were okay with issuing an experimental license for it.
As I read the FCC amateur regs emission spread spectrum emission modes such as CDMA can be used on all amateur bands as long as ITU emission designation symbols 2 and 3 are not both X. Such XX modes are designated by FCC as "SS" and only permitted above 420 MHz. 73 Trevor M5AKA
participants (2)
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Howie DeFelice -
M5AKA