This may not be very appropriate for the topic here. In that case, please turn it off.
The Packet Radio Users' Group in Japan is now planning to install a repeater or transponder on the moon.
Anyone familiar with space engineering?
Please contact us. We are looking forward to hearing from you.
Best Regaurds, Kaz - JN1LFD
Wow. This could be a worthy group effort and a fantastic topic for the ARDC.
Marius, YO2LOJ
On 21/12/2022 17:22, Kazuhiko OHO via 44net wrote:
This may not be very appropriate for the topic here. In that case, please turn it off.
The Packet Radio Users' Group in Japan is now planning to install a repeater or transponder on the moon.
Anyone familiar with space engineering?
Please contact us. We are looking forward to hearing from you.
Best Regaurds, Kaz - JN1LFD
Kaz, I am very interrested in the project.
I have no experience in space project but I would like to follow the project.
Is there a web site for it? or maybe a Group.io?
Is the japan Packet Radio User Group is preparing to ask for a grants from ARDC?
I am sure they would be very interrested in the project.
Wondering what band they are planning for the repeater, would it be an anlog FM one? Digital packet? Cross band repeat like a satellite?
VHF/UHF?
Lots of other question comming but will wait for your feedback ;-)
Pierre VE2PF 2022 TAC Chairman
________________________________________ De : Kazuhiko OHO via 44net 44net@mailman.ampr.org Envoyé : 21 décembre 2022 10:22 À : 44net@mailman.ampr.org Objet : [44net] Lunar Repeater Installation Project
This may not be very appropriate for the topic here. In that case, please turn it off.
The Packet Radio Users' Group in Japan is now planning to install a repeater or transponder on the moon.
Anyone familiar with space engineering?
Please contact us. We are looking forward to hearing from you.
Best Regaurds, Kaz - JN1LFD -- Kazuhiko OHO --- jn1lfd@gmail.com 於保 和彦 tel:+81 466 23 4200 cell:+81 80 5515 4200 Content provided within this e-mail including any attachments, is for the use of the intended recipients and may contain me and/or Packet Radio Users Group (PRUG) restricted information. Any unauthorized use, disclosure, or distribution of this communication in whole or in part is strictly prohibited. If you are not the intended recipient, please notify the sender by reply email or by telephone and delete the communication in its entirety. _______________________________________________ 44net mailing list -- 44net@mailman.ampr.org To unsubscribe send an email to 44net-leave@mailman.ampr.org
That sure is an ambitious project... it is much more difficult than a satellite in earth orbit. The issue you are facing is that a spot on the moon will receive sunlight for 14.5 days and then will be in darkness for 14.5 days. During the sunlit period it will bake in the sunlight to temperatures of 120C, during the dark period it will cool down to -150C and below.
It will be required to catch and store energy during the sunlit days and have enough of it in batteries to heat the spacecraft to temperatures where it will not be killed during the nights. Professionals can fall back to nuclear energy, but that is unpractical for amateurs.
It will not be easy... Good luck!
Rob
On 12/21/22 16:22, Kazuhiko OHO via 44net wrote:
This may not be very appropriate for the topic here. In that case, please turn it off.
The Packet Radio Users' Group in Japan is now planning to install a repeater or transponder on the moon.
Anyone familiar with space engineering?
Please contact us. We are looking forward to hearing from you.
Best Regaurds, Kaz - JN1LFD
And don't forget radiation hardening too.
On Wed, Dec 21, 2022 at 11:37 AM Rob PE1CHL via 44net < 44net@mailman.ampr.org> wrote:
That sure is an ambitious project... it is much more difficult than a satellite in earth orbit. The issue you are facing is that a spot on the moon will receive sunlight for 14.5 days and then will be in darkness for 14.5 days. During the sunlit period it will bake in the sunlight to temperatures of 120C, during the dark period it will cool down to -150C and below.
It will be required to catch and store energy during the sunlit days and have enough of it in batteries to heat the spacecraft to temperatures where it will not be killed during the nights. Professionals can fall back to nuclear energy, but that is unpractical for amateurs.
It will not be easy... Good luck!
Rob
On 12/21/22 16:22, Kazuhiko OHO via 44net wrote:
This may not be very appropriate for the topic here. In that case, please turn it off.
The Packet Radio Users' Group in Japan is now planning to install a repeater or transponder on the moon.
Anyone familiar with space engineering?
Please contact us. We are looking forward to hearing from you.
Best Regaurds, Kaz - JN1LFD
44net mailing list -- 44net@mailman.ampr.org To unsubscribe send an email to 44net-leave@mailman.ampr.org
Have you contacted AMSAT?
73 leon wa4zlw
On 12/21/2022 12:11 PM, Mark Phillips via 44net wrote:
And don't forget radiation hardening too.
On Wed, Dec 21, 2022 at 11:37 AM Rob PE1CHL via 44net 44net@mailman.ampr.org wrote:
That sure is an ambitious project... it is much more difficult than a satellite in earth orbit. The issue you are facing is that a spot on the moon will receive sunlight for 14.5 days and then will be in darkness for 14.5 days. During the sunlit period it will bake in the sunlight to temperatures of 120C, during the dark period it will cool down to -150C and below. It will be required to catch and store energy during the sunlit days and have enough of it in batteries to heat the spacecraft to temperatures where it will not be killed during the nights. Professionals can fall back to nuclear energy, but that is unpractical for amateurs. It will not be easy... Good luck! Rob On 12/21/22 16:22, Kazuhiko OHO via 44net wrote: > This may not be very appropriate for the topic here. > In that case, please turn it off. > > The Packet Radio Users' Group in Japan is now planning to install a > repeater or transponder on the moon. > > Anyone familiar with space engineering? > > Please contact us. We are looking forward to hearing from you. > > Best Regaurds, > Kaz - JN1LFD _______________________________________________ 44net mailing list -- 44net@mailman.ampr.org To unsubscribe send an email to 44net-leave@mailman.ampr.org
44net mailing list --44net@mailman.ampr.org To unsubscribe send an email to44net-leave@mailman.ampr.org
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Kazuhiko OHO -
Leon Zetekoff -
Marius Petrescu -
Mark Phillips -
pete M -
Rob PE1CHL