Suitsat battery voltage

To those observing the Suitsat voltage

Those of us who had the opportunity to observe the Suitsat equipment up close while building it are following the voltage readings with much interest.

Your efforts to gather the telemetry data are very much appreciated and will contribute to further success should we get the opportunity to build a second Suitsat.

I am including with this e-mail, a chart of battery current vs
battery voltage. The power system is designed to squeeze every drop of power out of the batteries that is possible.
As you will note the battery current will rise as the battery voltage drops. That is the power systems attempt to keep the transmitter voltage at 12V.

As the battery voltage nears 12V, the regulator will no longer be able to maintain 12v output. At a battery voltage below 9V all transmissions will cease. The computer will continue to operate down to 3V although with no transmissions, Suitsat will appear dead. I expect this drop-off to occur very rapidly.

We really appreciate the dedication and true amateur spirit of all those who have helped us monitor this unique and interesting Experiment.

Lou McFadin W5DID
AMSAT BOD
ARISS US Hardware manager

Visit AJ3U's website for more information on SuitSat, including many telemetry recordings and audio recordings

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