RadioSkaf's Alexander, RA3WOK, just wrote me that they do, indeed, suspect battery failure of the ARISSat-1. Investigation and plans for deployment continue.
"According to preliminary information the problem is a failure of the battery ... "
"In the near future, batteries will be on Earth. It cannot be kept on the ISS."
"The situation will improve in June and July, when scheduled launching of ARISSat-1."
Clint, K6LCS http://www.work-sat.com
can it default to solar cells? aka AO-7
73 Bob W7LRD ----- Original Message ----- From: "Clint Bradford" clintbradford@mac.com To: "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 8:33:40 AM Subject: [amsat-bb] ARISSat-1 - Battery Failure
RadioSkaf's Alexander, RA3WOK, just wrote me that they do, indeed, suspect battery failure of the ARISSat-1. Investigation and plans for deployment continue.
"According to preliminary information the problem is a failure of the battery ... "
"In the near future, batteries will be on Earth. It cannot be kept on the ISS."
"The situation will improve in June and July, when scheduled launching of ARISSat-1."
Clint, K6LCS http://www.work-sat.com _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
According to Anthony AA2TX's presentation/research ...
-The battery must be initially charged to power up ARISSat-1 -The battery must have a charge for the initial 15 minutes of activation -ARISSat-1 will power down during eclipse if battery fails -ARISSat-1 can operate without battery in sunlight
... can it default to solar cells? aka AO-7
Don't know if my answer is on target, Bob. But that's all I have at my fingertips ...
Clint
I think I remember the answer is "yes."
Mark N8MH
On Thu, Apr 14, 2011 at 12:38 PM, Bob- W7LRD w7lrd@comcast.net wrote:
can it default to solar cells? aka AO-7
73 Bob W7LRD ----- Original Message ----- From: "Clint Bradford" clintbradford@mac.com To: "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 8:33:40 AM Subject: [amsat-bb] ARISSat-1 - Battery Failure
RadioSkaf's Alexander, RA3WOK, just wrote me that they do, indeed, suspect battery failure of the ARISSat-1. Investigation and plans for deployment continue.
"According to preliminary information the problem is a failure of the battery ... "
"In the near future, batteries will be on Earth. It cannot be kept on the ISS."
"The situation will improve in June and July, when scheduled launching of ARISSat-1."
Clint, K6LCS http://www.work-sat.com _______________________________________________ Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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
Can't we just call AAA for a battery jump???? he he he
73 de Angelo
----- Original Message ----- From: "Mark L. Hammond" marklhammond@gmail.com To: "Bob- W7LRD" w7lrd@comcast.net Cc: "Clint Bradford" clintbradford@mac.com; "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 11:53 AM Subject: [amsat-bb] Re: ARISSat-1 - Battery Failure
I think I remember the answer is "yes."
Mark N8MH
On Thu, Apr 14, 2011 at 12:38 PM, Bob- W7LRD w7lrd@comcast.net wrote:
can it default to solar cells? aka AO-7
73 Bob W7LRD ----- Original Message ----- From: "Clint Bradford" clintbradford@mac.com To: "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 8:33:40 AM Subject: [amsat-bb] ARISSat-1 - Battery Failure
RadioSkaf's Alexander, RA3WOK, just wrote me that they do, indeed, suspect battery failure of the ARISSat-1. Investigation and plans for deployment continue.
"According to preliminary information the problem is a failure of the battery ... "
"In the near future, batteries will be on Earth. It cannot be kept on the ISS."
"The situation will improve in June and July, when scheduled launching of ARISSat-1."
Clint, K6LCS http://www.work-sat.com _______________________________________________ Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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 Bob & all..
As far as I can see, the main reason it needs power is to allow the transmitter to stay in the OFF state during deployment and for 15 minutes after release, once it switches ON the battery can be depleted without any adverse effects.
This was talked about here on -bb a few weeks back.
73
Pete
2i0VAX
On Thu, Apr 14, 2011 at 5:38 PM, Bob- W7LRD w7lrd@comcast.net wrote:
can it default to solar cells? aka AO-7
73 Bob W7LRD ----- Original Message ----- From: "Clint Bradford" clintbradford@mac.com To: "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 8:33:40 AM Subject: [amsat-bb] ARISSat-1 - Battery Failure
RadioSkaf's Alexander, RA3WOK, just wrote me that they do, indeed, suspect battery failure of the ARISSat-1. Investigation and plans for deployment continue.
"According to preliminary information the problem is a failure of the battery ... "
"In the near future, batteries will be on Earth. It cannot be kept on the ISS."
"The situation will improve in June and July, when scheduled launching of ARISSat-1."
Clint, K6LCS http://www.work-sat.com _______________________________________________ Sent via AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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
Dear Friends,
There has been a great deal of speculation on the amsat-bb about the Russian battery on ARISSat-1 having failed. Be aware that this is nothing other than idle speculation. There has been no information from RSC-Energia to support this.
I believe the mis-information comes from a report on the ARISSat-1 power system that was written by me and sent to RSC-Energia. One of the sections included a prediction of the battery life in orbit. The 825M3 is a Russian space suit battery and its life was not specified or characterized for operation of a satellite. The most recent AMSAT Journal includes an article that covers this material.
The article in the AMSAT journal predicts that the 825M3 battery should last for about 2 months in orbit. That means that if the satellite was deployed in February as originally planned, it might be too weak to run the satellite reliably by the time the Yuri celebration commenced on April 12th. This fact was stated on the (Russian) Roscosmos web site but is being misinterpreted as the battery "is weak."
For the record, the battery in ARISSat-1 was a brand new 825M3 space suit battery and was charged on the ISS prior to the February test. After charging, the battery can run ARISSat-1 for at least 100 hours so it should have had more than enough remaining charge to operate through the Yuri Gagarin event. It is of course possible that the battery did indeed fail but any information propagated on amsat-bb to that effect at this time is not based on facts. AMSAT is working with RSC-Energia and NASA to identify the actual reason that the satellite was not heard.
73, Tony AA2TX
There are LOTS of reasons that the bird could have failed, in my viewpoint the BEST one is that the battery has some issues. Operating the vehicle in a thermal environment that it was not designed for would be a first guess, followed by some sort of "crib death" issue, and next comes parts connected wrong.
In any event the failure does not bode well for a successful sat deployment.
See if this makes it on the board. Robert G. Oler WB5MZO
On Apr 15 2011, R Oler wrote:
There are LOTS of reasons that the bird could have failed, in my viewpoint the BEST one is that the battery has some issues. Operating the vehicle in a thermal environment that it was not designed for would be a first guess, followed by some sort of "crib death" issue, and next comes parts connected wrong.
In any event the failure does not bode well for a successful sat deployment.
See if this makes it on the board. Robert G. Oler WB5MZO _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
One small consolation is that if the ISS crew can't get it working before tossing it into space, it could (possibly) be brought back to Earth on a future return trip to be diagnosed and repaired on the ground.
But let's hope it is something simple to fix up on the ISS and that someone on the crew can take a little time to fix it.
But I also understand that none of those 3 scenarios are guaranteed (easy to fix, time to fix it, or return it to Earth).
John P. Toscano, W0JT
Or we could put Gould on the the next trip to the ISS and fix it! Comon laugh--it's the weekend.
73 Bob W7LRD
----- Original Message ----- From: tosca005@umn.edu To: "R Oler" orbitjet@hotmail.com Cc: "Amsat BB" amsat-bb@amsat.org Sent: Saturday, April 16, 2011 8:47:57 AM Subject: [amsat-bb] Re: ARISSat-1 - Battery Failure
On Apr 15 2011, R Oler wrote:
There are LOTS of reasons that the bird could have failed, in my viewpoint the BEST one is that the battery has some issues. Operating the vehicle in a thermal environment that it was not designed for would be a first guess, followed by some sort of "crib death" issue, and next comes parts connected wrong.
In any event the failure does not bode well for a successful sat deployment.
See if this makes it on the board. Robert G. Oler WB5MZO _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
One small consolation is that if the ISS crew can't get it working before tossing it into space, it could (possibly) be brought back to Earth on a future return trip to be diagnosed and repaired on the ground.
But let's hope it is something simple to fix up on the ISS and that someone on the crew can take a little time to fix it.
But I also understand that none of those 3 scenarios are guaranteed (easy to fix, time to fix it, or return it to Earth).
John P. Toscano, W0JT
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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
----- Original Message ----- From: "Anthony Monteiro" aa2tx@comcast.net To: "AMSAT BB" amsat-bb@amsat.org Sent: Thursday, April 14, 2011 9:42 PM Subject: [amsat-bb] Re: ARISSat-1 - Battery Failure
Dear Friends,
There has been a great deal of speculation on the amsat-bb about the Russian battery on ARISSat-1 having failed. Be aware that this is nothing other than idle speculation. There has been no information from RSC-Energia to support this.
I believe the mis-information comes from a report on the ARISSat-1 power system that was written by me and sent to RSC-Energia. One of the sections included a prediction of the battery life in orbit. The 825M3 is a Russian space suit battery and its life was not specified or characterized for operation of a satellite. The most recent AMSAT Journal includes an article that covers this material.
The article in the AMSAT journal predicts that the 825M3 battery should last for about 2 months in orbit. That means that if the satellite was deployed in February as originally planned, it might be too weak to run the satellite reliably by the time the Yuri celebration commenced on April 12th. This fact was stated on the (Russian) Roscosmos web site but is being misinterpreted as the battery "is weak."
For the record, the battery in ARISSat-1 was a brand new 825M3 space suit battery and was charged on the ISS prior to the February test. After charging, the battery can run ARISSat-1 for at least 100 hours so it should have had more than enough remaining charge to operate through the Yuri Gagarin event. It is of course possible that the battery did indeed fail but any information propagated on amsat-bb to that effect at this time is not based on facts. AMSAT is working with RSC-Energia and NASA to identify the actual reason that the satellite was not heard.
73, Tony AA2TX
Hi Tony, AA2TX
I know that you did a great work for ARISSsat-1,congratulations, but after reading the Gould Smith report AMSAT NEWS SERVICE ANS-104 ANS Special Bulletin - ARISSat-1 Not Heard During Gagarin Commemoration everyone understand that there was a poor connection between NASA, AMSAT and RSC-Energia.
I hope AMSAT will be able to identify the actual technical reason that the satellite was not heard.
To be honest with you the actual situation of a "unknow technical reason" for ARISSsat-1 is spiritually similar to when someone forgot to remove the famous red cap over a valve of AO40 before to fly and once again we are all concerned for the future !
Best 73" de
i8CVS Domenico
participants (9)
-
Angelo Glorioso -
Anthony Monteiro -
Bob- W7LRD -
Clint Bradford -
i8cvs -
Mark L. Hammond -
P.H. -
R Oler -
tosca005＠umn.edu