2016 - Pyro Instrumentation Power OFF (+2.4 W), What does this mean? Options

[jgoldader]

Hi all,

Okay, I give up. I've been researching the future plans for the Voyagers for a talk I'm giving later this week. There's a nice write-up at http://voyager.jpl.nasa.gov/science/thirty.html discussing the plans for the Voyager Interstellar Mission. Among the great info there are the steps that will be taken to deal with the dwindling output from the RTGs. I understand turning off the GYROs and DTR, no problem. But the last dated command (and resulting power margin change) is:

2016 - Pyro Instrumentation Power OFF (+2.4 W)

Could somebody please explain to me what this means? Does it mean turning off the pyro subsystem? What pyros would be left to fire on Voyager at this time? All I can think of is some system that could be used to permanently disable and isolate particular pieces of hardware in the event of catastrophic failure.

I've looked and looked and looked at NTRS and JPL's TRS, and have had no luck.

Thanks for any help you can give,
Jeff

ps- is there any hope of the Voyager Science and Mission Systems Handbook appearing online someday? What references I can find to it seem to suggest it's the "master manual" for Voyager, but its availability is listed as hardcopy only, in the JPL library, a couple of thousand miles from here.