Right over my home ... 73
https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail Livre de vírus. www.avast.com https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail. <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
Em dom., 5 de jul. de 2020 às 21:59, Paul F. Merrill via AMSAT-BB < [email protected]> escreveu:
https://youtu.be/w-nfF7bK34Y _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Nice video.
On Sun, Jul 5, 2020 at 8:00 PM Paul F. Merrill via AMSAT-BB < [email protected]> wrote:
https://youtu.be/w-nfF7bK34Y _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
On the 1990 launched PACSATS AO-16 & LO-19, onboard software had detection of SEUs (Single Event Upsets), allowing detection and correction on the fly, as well as logging of SEUs.
SEUs were produced when high energy particles hit and change a bit in local satellite memory.
These SEUs Logs could be downloaded, and thru a local developed program knowing time of SEU it could be determined where was the satellite at that time.
Thru several days error logs, plots could be produced, amazingly showing the South Atlantic Anomaly danger zone and other areas of higher energy.
One of the graphs at: http://amsat.org.ar/showlog.gif
At that time (1991) results where shared to NASA, becoming a contribution due to Amateur Satellites and AMSAT.
This 30 years old application (showlog at http://amsat.org.ar/SOFTWARE/TRACK1/SHOWLOG.ZIP ) is still available and could be run using DOSBOX.
73, LU7ABF, Pedro
On 7/8/20, Robert McGwier via AMSAT-BB [email protected] wrote:
Nice video.
On Sun, Jul 5, 2020 at 8:00 PM Paul F. Merrill via AMSAT-BB < [email protected]> wrote:
https://youtu.be/w-nfF7bK34Y _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
-- Bob McGwier Founder, Federated Wireless, Inc Founder and Technical Advisor, HawkEye 360, Inc Adjunct Professor Virginia Tech Former Chief Scientist: The Ted and Karyn Hume Center for National Security and Technology Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
On 7/5/2020 19:58, Paul F. Merrill via AMSAT-BB wrote:
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
participants (5)
-
Jerry Buxton -
Paul F. Merrill -
Pedro Converso -
PY5LF -
Robert McGwier