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" UPDATE: The Voyager team has hired internally for Zottarelli&amp;#039;s replacement, and\u00A0the retirement is not anticipated until next year. &amp;quot;I go down the hallway and I meet people and I say, &amp;#039;Wow, Voyager was the best project I&amp;#039;ve ever worked on. I wish I could get back on it again.&amp;#039;\u00A0Those are the kind of people that I seek out when I have to replace people,&amp;quot; Dodd said in the previous interview. Larry\u00A0Zottarelli, the last original Voyager engineer\u00A0still on the project, is retiring after a long and storied history at JPL. While there are still a few hands around\u00A0who worked on the original project, now the job of keeping this now-interstellar spacecraft going\u00A0will fall to someone else. And that someone needs to have some very specific skills.\u00A0 Yes, it&amp;#039;s going to require coding, but it won&amp;#039;t be in Ruby on Rails or Python. Not C or C++.\u00A0Go a little further back, to the\u00A0assembly languages used in early computing. Know Cobol? Can you breeze through\u00A0Fortran? Remember your Algol? Those fancy new languages from the late 1950s?\u00A0Then you might be the person for the job.\u00A0 &amp;quot;It was state of the art in 1975, but that&amp;#039;s basically 40 years old if you want to think of it that way,&amp;quot; Suzanne Dodd, program manager for the Voyager program, said in a phone interview.\u00A0&amp;quot;Although, some people can program an assembly language and understand the intricacy of the spacecraft,\u00A0most\u00A0younger\u00A0people can&amp;#039;t or really don&amp;#039;t want to.&amp;quot;  As the new engineer, you have a few tasks ahead of you\u00A0and about 64 kilobytes of memory to work with. The Voyager twins sport\u00A0NASA&amp;#039;s earliest on-board computers, a step away\u00A0from the sequencers used on projects like ISEE-3. A sequencer uses radio or audio\u00A0tones to turn on an instrument but\u00A0with an onboard computer, more functions can be automatic, which is especially helpful\u00A0if your spacecraft is more than 12 billion miles away\u201417 hours by radio\u2014and only certain antennas work with it.\u00A0Voyager 2, now\u00A0moving downward from the ecliptic of the solar system, can only be reached by the Canberra antenna of the Deep Space Network.\u00A0 The last true software overhaul was in 1990, after the 1989 Neptune encounter and at the beginning of the interstellar mission.\u00A0&amp;quot;The flight software was basically completely re-written in order to have a spacecraft that could be nearly autonomous and continue sending back data to us even if we lost communication with it,&amp;quot; Dodd said.\u00A0&amp;quot;It has a looping routine of activities that it does automatically on board and then we augment that with sequences that we send up every three months.&amp;quot; Both spacecrafts are &amp;quot;very healthy for senior citizens&amp;quot; Dodd says and they have enough power left to run for\u00A0another decade, though\u00A0beyond that the future is uncertain. To try and prolong their lives, a new engineer would have to help figure out a way to make a sort of &amp;quot;energy audit&amp;quot; from afar,\u00A0check to see the\u00A0energy requirements of remaining instruments, and help institute shutdown procedures that make the most of what&amp;#039;s left of the onboard energy.\u00A0 &amp;quot;[The original engineers]\u00A0said, &amp;#039;This subsystem takes 3.2 watts of power.&amp;#039;\u00A0Well, it really took 3 watts, but they wanted to be conservative when they built the spacecraft,&amp;quot; Dodd says. &amp;quot;Now, we are at the point in the mission where we are trying to get rid of the margins and get the actual\u00A0numbers.&amp;quot;  That&amp;#039;s when it&amp;#039;s\u00A0time to turn back to old documents to figure out the logic behind some of the engineering decisions. Dodd says it&amp;#039;s easy to find the engineering decisions, but harder to find the reasoning. This means combing through secondary documents and correspondence hoping to find the solution, trying to get in another\u00A0engineer&amp;#039;s head. The last resort is picking those engineers&amp;#039; brains directly. Many are retired, and are working on 40-year-old memories. Still, the small team working on Voyager today\u00A0has a list of engineers and others on-hand to call in emergencies. Dodd herself has worked on the spacecraft\u00A0off and on\u00A0since 1984, just before the Uranus flyby. &amp;quot;People&amp;#039;s memories 40 years later aren&amp;#039;t always accurate,&amp;quot; Dodd says. &amp;quot;It&amp;#039;s good to have that data point, but you can&amp;#039;t guarantee 100% that that was the correct rationale when somebody&amp;#039;s trying to recall it.&amp;quot; The clock is ticking. It&amp;#039;s time to find a new engineer as Zottarelli prepares to retire. There will be six months to a year of on-the-job training, but that&amp;#039;s about it.\u00A0Dodd isn&amp;#039;t holding out hope for some\u00A0up-and-coming young coder who work on the project for decades to come. She says\u00A0instead its closer to walking up and down the halls of JPL, hoping to nab an experienced someone slightly younger than the retirees with enough of a basis in assembly languages to keep the spacecraft going.\u00A0  &amp;quot;I&amp;#039;m typically not getting a fresh college grad, I&amp;#039;m more or less getting people in their early 50s as opposed to people that are in their 70s,&amp;quot; she says.\u00A0 Just a warning for would-be programmers: these languages aren&amp;#039;t on code academy.\u00A0 "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/space/a17991/voyager-1-voyager-2-retiring-engineer/>