[amsat-bb] ARISSat-1 battery

2011-08-29 Thread g0mrf
Hi all. The ARISSat team seem to have reached the conclusion that the Silver Zinc battery technology is not really suited for an orbiting satellite with a 55 / 35 minute charge and discharge cycle. I wonder if a couple of small Lithium polymer battery packs would be a suitable replacement for

[amsat-bb] ARISSat-1 Battery

2011-08-14 Thread Anthony Monteiro
Dear Friends, This is speculation but it looks to me like we have had a bit of good luck regarding the battery. Looking at the battery voltage from deployment on... Up until Aug 11, the battery seems to be deteriorating normally with a slight downtrend in the max voltage as expected. But on

[amsat-bb] ARISSat-1 battery situation

2011-08-12 Thread giuliop70
Hi to everybody, I've a question about the ARISSat-1 battery situation : If the battery goes dead (case 1: open circuit, case 2: short circuit, case 3: current is absorbed from panels but not hold from battery) which will be the behavior of the satellite? Thanks and 73 Giulio AB2VY Sent from

[amsat-bb] ARISSat-1 battery eclipse voltage decreasing

2011-08-11 Thread Gould Smith
The ARISSat-1 Battery voltage is decreasing each eclipse period. It therefore is taking longer for the Battery to charge up to 32.5V to allow the switch from Low Power to High Power when the satellite enters an illumination period. Kenneth Ransom, N5VHO has plotted the battery min/max for the

[amsat-bb] ARISSat-1 Battery Condition

2011-08-03 Thread Clint Bradford
... Battery voltage around 33V status - charging. -David G0MRF Wow - I showed the battery at 28.891 during a pass last weekend. Solar panels are going their jobs! Sorry ... too old for this much excitement in one day ... Clint Bradford http://web.me.com/clintbradford/k6lcs/EVA29-1.html

[amsat-bb] ARISSat-1 Battery Charging

2011-07-27 Thread Clint Bradford
At the top of today's schedule for the Russians aboard the ISS ... Operations and experiments on the International Space Station July 27, 2011 - On July 27 the Russian segment of International Space Station, astronauts plan to continue their work to prepare for spacewalk (leak check suits,

[amsat-bb] ARISSat-1 Battery

2011-07-25 Thread Clint Bradford
OK - Charging of the ARISSat-1's battery is scheduled for July 27. And a test this weekend. Will the battery be charged a second time - before EVA-29 on August 3? What is the expected/anticipated battery charge state to be after the July 30 test? Good enough for deployment without another

[amsat-bb] ARISSat-1 - Battery Failure

2011-04-14 Thread Clint Bradford
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

[amsat-bb] ARISSat-1 battery.

2011-04-13 Thread G0MRF
Hi Nitin / Vince. Although the non appearance of ARISSat-1 has been a little disappointing, in the overall scheme of things we are still looking at a major AMSAT achievement here. There is after all a satellite awaiting 'launch' on the ISS. We know it's a success because so many people