----- Original Message ----- From: "Anthony Monteiro" <aa...@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 _______________________________________________ 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
