Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas.
Op 18-1-2012 17:06, Raidel Abreu Espinet schreef:
Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas. _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Not a bad idea, in fact it has been done before and at one time was planned a seccond time, lookup pcsat 2 and pcsat 3. Not sure why pcsat 3 never flew, from what I understood it was ready to go awaiting rfi aprovement.
73 Andre PE1RDW
Raydel:
Unfortunately, nothing concerning the ISS is easy.
The ISS has had problems with radio frequency interference (RFI) in the past, and an RFI problem could affect the docking of supply vessels (e.g., a collision) or spacewalking astronauts. Astronaut safety is paramount. As a result, all non-critical radios (including ham radios) are turned off during docking, repositioning of the Soyuz escape capsules, and space walks. So a hitchhiking amateur satellite would need to be *reliably* remote controllable from inside the ISS and maybe from the ground too.
It should have been simple, but one *major* component of both SuitSat and ARRISat was the triple redundant timer that kept the transmitters off for 15 minutes after 3 toggle switches were turned on. This allowed the satellites sufficient time to travel away from the ISS before the low-power transmitting began.
Catching a ride on an unmanned rocket is difficult and expensive. Getting to the ISS and on any manned mission is near impossible. It is a real credit to the dedicated volunteers of AMSAT that we've ever been on board the shuttle or ISS.
73, Steve N9IP -- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andre Sent: Wednesday, January 18, 2012 11:42 AM To: [email protected] Subject: [amsat-bb] Re: Probably a silly idea...
Op 18-1-2012 17:06, Raidel Abreu Espinet schreef:
Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas. _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Not a bad idea, in fact it has been done before and at one time was planned a seccond time, lookup pcsat 2 and pcsat 3. Not sure why pcsat 3 never flew, from what I understood it was ready to go awaiting rfi aprovement.
73 Andre PE1RDW _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
It should have been simple, but one *major* component of both SuitSat
and ARRISat was the triple redundant timer that kept the transmitters off for 15 minutes after 3 toggle switches were turned on. This allowed the
satellites sufficient time to travel away from the ISS before the
low-power transmitting began.
Noteworthy to say that this system has failed with the ARRISat launch, and nobody seemed to care or even notice. Not that the timer has failed - I am sure it did not transmit within 15 minutes after being turned on. The problem was that one of the astronauts flicked the switches as soon as he and the satellite was outside the station (instead of switching them on just before they let go), but then a lengthy delay occurred as they discovered the missing UHF antenna. Meanwhile the timer expired and ARRISat began operating & transmitting. Clear evidence of this are sstv images received from ground-stations which show the astronaut holding the satellite in his hands : http://wordpress.projectoscar.co.uk/?page_id=543 and others.
Andreas - VK4HHH
________________________________ From: Stephen E. Belter [email protected] To: "[email protected]" [email protected] Sent: Thursday, 19 January 2012 3:07 AM Subject: [amsat-bb] Re: Probably a silly idea...
Raydel:
Unfortunately, nothing concerning the ISS is easy.
The ISS has had problems with radio frequency interference (RFI) in the past, and an RFI problem could affect the docking of supply vessels (e.g., a collision) or spacewalking astronauts. Astronaut safety is paramount. As a result, all non-critical radios (including ham radios) are turned off during docking, repositioning of the Soyuz escape capsules, and space walks. So a hitchhiking amateur satellite would need to be *reliably* remote controllable from inside the ISS and maybe from the ground too.
It should have been simple, but one *major* component of both SuitSat and ARRISat was the triple redundant timer that kept the transmitters off for 15 minutes after 3 toggle switches were turned on. This allowed the satellites sufficient time to travel away from the ISS before the low-power transmitting began.
Catching a ride on an unmanned rocket is difficult and expensive. Getting to the ISS and on any manned mission is near impossible. It is a real credit to the dedicated volunteers of AMSAT that we've ever been on board the shuttle or ISS.
73, Steve N9IP -- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andre Sent: Wednesday, January 18, 2012 11:42 AM To: [email protected] Subject: [amsat-bb] Re: Probably a silly idea...
Op 18-1-2012 17:06, Raidel Abreu Espinet schreef:
Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas. _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Not a bad idea, in fact it has been done before and at one time was planned a seccond time, lookup pcsat 2 and pcsat 3. Not sure why pcsat 3 never flew, from what I understood it was ready to go awaiting rfi aprovement.
73 Andre PE1RDW _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Hi,
This was done for PCSat-2 as part of the MISSIE experiment.
The problem is that you have to GUARANTEE to NASA that the device is inoperable during space walks which means a command uplink and several layers of safety in the command and control.
Dave, G4DPZ
On 18/01/12 16:06, Raidel Abreu Espinet wrote:
Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas. _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
PCSAT-2 did exactly that on the ISS in July 2005, however, it was returned to Earth Sep 2006.
It requires an expensive EVA to install and there may be frequency coordination issues with the two amateur radio stations already on the ISS.
I wonder what the capabilities of the Kibo Robot Arm are ? I believe it can attach payloads to the exterior Exposed Facility (EF) with the need for an EVA.
73 Trevor M5AKA
--- On Wed, 18/1/12, Raidel Abreu Espinet [email protected] wrote:
From: Raidel Abreu Espinet [email protected] Subject: [amsat-bb] Probably a silly idea... To: [email protected] Date: Wednesday, 18 January, 2012, 16:06 Hi all,
This is probably a silly idea but who knows....
ARRISat-1 was a wonderfull satellite but with a short life. The ISS instead is a wonderfull platform, of course I know how difficult is to install inside it new radios and antennas for cross-repeaters, but how difficult is really to take a small box and firmly attach it to some low risk part of the ISS, the satellite-box will use its own power solar cells and antennas and the ISS is just the carrier.
It may be something silly but probably not difficult, if the astronauts made a "hand launch" with ARISSat-1/KEDR why can not them just hold it with latches in a low risk part of the ISS. Of course if a battery is a risk we can just design a simple system capable of work only in sun light.
If you think this is a bad idea, just ignore it, if not, well who knows, may be some day an astronaut attach an small satellite in the ISS side....
73, Raydel, CM2ESP Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas. _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (6)
-
Andre -
Andy Kellner -
David Johnson -
Raidel Abreu Espinet -
Stephen E. Belter -
Trevor .