[amsat-bb] Satellite Danger Zone

[Jerry Buxton]

On 7/5/2020 19:58, Paul F. Merrill via AMSAT-BB wrote:
> https://youtu.be/w-nfF7bK34Y
>
A  nice find, Paul.
The video ties to our Fox-1 series of CubeSats that were designed to
reboot and carry on, based on expected IHU resets in the SAA.  This plot
http://amsat.us/images/2020-07-08%20(2).png
was the first developed and shows the location of IHU resets for about
the first two years of AO-85 (Fox-1A) operation, starting after launch
in 4Q 2015.  It clearly showed us that the expectation was sound as well
as how it compared to our thoughts on the number of SAA upsets per day. 
Not all passes through the SAA had resets and there were resets outside
the SAA, some of which may be linked to the aurorae. 
The Earth image mapping of the data was done by Douglas Quagliana, KA2UPW/5.

The information from all of the Foxes provides us guidance on the design
of GOLF satellites at various heights and what may be expected and
mitigated using low cost COTS components.  The RT-IHU is one of the
technology exploration systems on the GOLF-TEE mission and is a project
that looks to provide better radiation tolerance in higher LEO.  The
initial flights of RT-IHU will help in assessing risk tolerance for
certain missions in what we can do using COTS vs. costly rad-hard
components.

AO-85 also carried the first radiation effects experiment flown on an
AMSAT satellite by our partner Vanderbilt University, followed by Fox-1B
(RadFxSat/AO-91) and soon to be launched Fox-1E (RadFxSat-2), all
observing radiation upsets and events on COTS components.

Jerry Buxton, NØJY