Mission risk is too high with a single thruster, and also attitude control with only reaction wheels needs alternate means of desaturation. 

So the Bricsat-p and Canyval-X systems are appropriate pathfinder with arrays of micro thrusters and use in conjuction with reaction wheels. 

Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
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From: Ashhar Farhan <[email protected]>
Sent: Saturday, August 13, 2022 2:37:48 AM
To: Brian Wilkins <[email protected]>
Cc: AMSAT BB <[email protected]>
Subject: [AMSAT-BB] Re: Phase IV satellite
 
What does it take to push a craft in GTO to GEO ? I guess that there is a single thruster involved. Do you think any lab will donate one?
The GTOs should be relatively inexpensive to get to. 
I can't see why Icoms and Yaseuas ant loosen their purse strings for a project like this. I have heard that they sold in excess of 20,000 IC-7300 last year alone. That is just one of their radios, and that is just one company. Then there is everyone from the tiny HF signals all the way to Kenwoods and Yaesu. Hams have patronized their products for long, at times, well past their sell-by-date. The FT817 was kept alive mostly by the sat operators.
If each picks up a million dollar ticket, with matching grants, 10 M USD isnt a big deal. It is also big business for them. An 8 MHz slice of space spectrum could otherwise cost them a few times over.
- f

On Sat, Aug 13, 2022, 4:15 AM Brian Wilkins <[email protected]> wrote:
John,

That quote reminds me of this blog reposted to Hackaday:

Ham Radio Needs To Embrace The Hacker Community Now More Than Ever


https://www.kj7nzl.net/blog/ham-radio-needs-to-embrace-the-hacker-community-now-more-than-ever/


On Thu, Aug 11, 2022 at 12:54 PM John Magliacane via AMSAT-BB <[email protected]> wrote:
Back in the 1980s, then FCC Private Radio Bureau Chief Carlos V. Roberts spoke to "CQ" magazine about the Amateur Radio Service where he stated:

"I think the service should be devoted to technical achievement and experimentation.  Many of the other activities that amateurs engage in can be done in other personal radio services, but technical experimentation is, and should remain, limited to the amateur service."

Today we can extend the phrase "other personal radio services" to include Internet and cellular services as well.

So, what could we do in a geostationary orbit that won't simply be a duplication or an enhancement over what's already been done for decades?

I think it would be neat to have the equivalent of a WebSDR in geostationary orbit to see exactly what can be received well beyond the Earth's ionosphere. The results could be rather surprising...


73 de John, KD2BD

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KO4AQF

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Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
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