Category: Technology

What’s New With Voyager 1?

personby Deborah J. Ross
schedulePosted on

 Voyager 1 is no Longer Sending Home Garbled Data!

This aging and still-valuable spacecraft has been exploring the outer parts of the solar system since its launch in 1977, along with its twin sibling, Voyager 2. They each traveled slightly different trajectories. Both went past Jupiter and Saturn, but Voyager 2 continued on to Uranus and Neptune. They’re both now outside the solar system, sending back data about the regions of space they’re exploring.

Voyager 1 flew past Jupiter in March 1979, and Saturn in November 1980. After its close approaches to those two gas giants, it started a trajectory out of the solar system and entered interstellar space in 2013. That’s when it ceased to detect the solar wind and scientists began to see an increase in particles consistent with those in interstellar space.

These days, Voyager 1 is more than 157.3 astronomical units from Earth and moving out at well over 61,000 km/hour. It’s busy collecting data about the interstellar medium and radiation from distant objects. If all goes well, the spacecraft should continue sending back data for nearly a decade. After that, it should fall silent as it travels beyond the Oort Cloud and out to the stars.

Earlier this year, however, the teams attached to the Voyager 1 mission noticed that the spacecraft was sending weird readouts about its attitude articulation and control system (called AACS, for short). Essentially, the AACS was sending telemetry data all right, but it was routing it to the wrong computer, one that had failed years ago. This corrupted the data, which led to the strangely garbled messages the ground-based crew received.

Once the engineers figured out that the old, dead computer might have been part of the problem, they had a way forward. They simply told the AACS to switch over sending to the correct computer system. The good news was that it didn’t affect science data-gathering and transmission. The best news came this week: team engineers have fixed the issue with the AACS and the data are flowing normally again.

The ongoing issue with AACS didn’t set off any fault protection systems onboard the spacecraft. If it had, Voyager 1 would have gone into “safe mode” while engineers tried to figure out what happened. During the period of garbled signals, AACS continued working, which indicated that the problem was either upstream or downstream of the unit. The fact that data were garbled provided a good clue to related computer issues.

This adapted article appeared in Universe Today. Click through for the full thing.

Ways of Making Progress

personby Nancy Jane Moore
schedulePosted on

I am not one of those people who pines for the way things used to be.

I mean, I grew up before there was a vaccine for measles and related diseases, which means that I had every version of measles possible regularly from the time I was five to the time I was ten.

I am fortunate that I had no lasting effects from those bouts, but it wouldn’t have been a bad thing to have missed out on measles.

So I’m a huge fan of vaccines and of other treatments and preventative measures for contagious disease. (I can rant about this at length, and have, but that’s not my goal in this post.)

In general, I’m in favor of many of the changes that have occurred in my lifetime, the mechanical and the digital as well as the medical. For example, as soon as I learned to type, I began writing on a typewriter.

I jumped to correcting typewriters as soon as I could afford one and I got my first computer in 1983 primarily as a writing device.

I also love the communication options. Email is great. Texting is great. Having a phone with you so you can coordinate meeting up in person is fantastic.

What I don’t love are the constant changes and updates. While security updates are important and some changes do provide an improved product, there are way more updates than need to happen.

And of course, if you don’t want to change all those things, sooner or later your computer won’t be able to use the tools it needs.

Here’s the other problem — and it might be the one that bugs me the most — these changes are sent along willy-nilly, with no regard to your reasons for using the device or what you might be doing at the time.

It’s not like you get a message — email would work for this nicely — that says these updates are available and recommended and here is where you go to get them when you’ve set aside some time for tech maintenance. Nor is it like you get a choice when, say, you don’t really want to change your word processing program.

No, they assume that the most important thing in your life is tech maintenance and interrupt whatever you’re doing, when in fact the most important things are the projects that you’re using the tech devices to do.

Writing, analyzing data, meeting people via Zoom — those are the important things, not keeping up the computer. Continue reading “Ways of Making Progress”…

Letting Go, Website Edition

personby Madeleine Robins
schedulePosted on

I have rituals in the morning. Getting up is hard enough without making a bit of a routine of it. So there is the shower ritual (with various subsets), then the coffee ritual, and then the email-and-internet ritual. The last mostly involves throwing out a virtual ream of political emails and ads, scanning for the one or two emails that actually should get to me (most of them are things like contacts from the doctor or pharmacy–like the olden days of mail, you rarely get something personal that you should actually, like, read). And then I do my morning web-crawl.

This sounds like it should involve a blue-and-red spandex outfit, but sadly it mostly involves me sitting crosslegged on the couch, checking in to the websites I look at every day. Some sites I’ve been checking on for over a decade. Some are newer additions to the crawl. And every now and then I have to pull a site from the rota, and it makes me sad.

When Jay Lake died it took me months to stop checking his page for the roundup of odd and interesting links he posted every day. I mean, I knew Jay was gone, and yet… checking in was part of the ritual. But rather than making it feel that Jay was less gone, it made his loss more felt. Eventually I stopped. Then there are the sites I look at that don’t change every day–Stonekettle Station can go for months without a post (Jim Wright appears to be mostly on Twitter these days) so I’m always taken aback when there’s a new post up. And then there are the formerly active sites that just go silent. I go back and go back and there’s no one there and eventually (like this week) I cut them out of the rota. But not without a feeling of loss.

Since I’m usually doing the blog crawl in between showering and leaving the house for work, having less rather than more material to read is probably a good thing. I have the order in which I check things pretty much reduced to a superstition–I’m not proud of this, but there it is. Which means that not typing in the address of a site that has left the rotation takes thought (at 8am, when I’m still drinking coffee and trying to persuade myself that I can think). My fingers hover over familiar keys and I have to say, aloud, NO, before I go to the next one. I learn, eventually, and the new order of reading becomes second nature–until I have to add something new or, as is more likely, admit that a website that was a source of amusement or information is no longer there. I hold on to things longer than I should, I suppose.

 

 

A Few Thoughts on Technology and Transitions

personby Deborah J. Ross
schedulePosted on

It’s always amazing and heartening how much inspiration we can draw from the next generation, whether they are our own children or someone else’s. In my personal life, my younger daughter dragged me, kicking and screaming, into the world of social media, into getting my first stupidphone, and later into video chatting (during her  years of medical school on the other side of the country). Now these technologies are part of my everyday and work life. They’ve saved my sanity during the pandemic.

I think it’s good to keep learning new things, to use our minds and bodies in different ways. One of the challenges of these new computer-based technologies is that they require us to use different methods of thought. The transition, for example, from keyboard-based word processing programs (like WordStar for DOS, the one I first used) to graphics-based (Windows) programs entailed a different logic and hand coordination. And both of them are a far cry from the typewriter I used to write my first published stories.

My very first stories (actually, my first umpteen attempts at novels) were written by hand in composition books or on scratch paper. I remember reading an interview with the British mystery writer Dick Francis, in which he described writing in ink in composition books (and that it had never occurred to him that a story, once written, could be revised!) so the method is definitely a time-honored one. Once I learned to type (in high school, on those really heavy manual typewriters) that became my preferred method, although when my children were small, I always carried a spiral-bound notebook on which to work on the Story of the Day in odd moments. Retyping a revision was a major chore, since I had to do it myself. I became expert in the application of white correction fluid. At least carbon copies were no longer necessary, but I had to take my finished manuscript to a copy shop because in those days no one owned a home copier.

I am of several minds about whether the ease of making changes as I go, being able to print out a manuscript at any stage, and so forth, have really changed how I write. I love the saying that the most important word processor is your brain. Perhaps I splat over the page, as it were, more spontaneously when I use a computer just because it’s so easy to tidy up my prose later.

That can be a good thing as I follow whatever wacky idea pops into my mind. Some of them are truly best expunged but others are quite juicy. In some ways I am more focused now than in 30 or 40 years ago; I know much more about how to put a story together, even if it isn’t one I’ve outlined.

Having multiple writing media available to me is a great thing. I often go back and forth when I’m stuck, especially between dictating and typing or typing and longhand. Dictation using voice recognition software is especially great for dialog or speeches (can you see me acting out the parts of the various characters?) Just as we don’t all write in the same way, I don’t write in the same way all the time. Sometimes words flow and then I want the medium that allows me to best keep up with them. But other times I’m stuck (or sulky, or distracted, or tired) and switching can help get things rolling again.

In the end, though, the only version that matters is the one in the hands of the reader.