Hi Ray

So many schools/Univs want to use a Raspberry Pi in their design.

Ok for the Pi, but they don't use a proper SD card.

The Charge Pump in the SD card fails at a rather low radiation dose.

That was much of that clump of failures.

"Cheap parts cost too much!"

73 Kent WA5VJB/G8EMY

On Sunday, January 31, 2021, 09:43:48 AM CST, Ray Soifer via AMSAT-BB <amsat-bb@amsat.org> wrote:

The intent of this email is to begin a serious techncal discussion. I do not know where it will lead.

My question is: is there something wrong with the Cubesat platform? Its failure rate is pretty high. If you include the university-built Cubesats which IARU has coordinated over the years, perhaps as many as half have failed upon reaching orbit. AMSAT-NA has orbited quite a few successful communications satellites, all of which are or were larger than Cubesats. I have been a member of AMSAT since 1969 and am not questioning its ability. Rather, my question concerns the Cubesat platform.

The AMSAT-BB reflector includes people with successful as well as unsuccessful

Cubesats. Can we learn anything from their experience?

73 Ray W2RS

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