natep

In this case, the "corrections on the fly" refer to all of the real-time responses that the software makes without ground involvement. In the case of a solar limb sensor detecting the sun, the probe will abandon its data collection for that near approach, and go into an emergency response that has been made as straightforward and deterministic as possible, to maximize the chances of recovery for all single-fault and some double-fault scenarios.

To answer your question about software upload, the PSP has 3 redundant CPUs (primary, hot spare, backup spare), and each has multiple boot images. To upload software, the team uploads it to an inactive image of the backup spare CPU, promotes it to hot spare for long enough to collect the data it needs, reboots it into the new image, and then rotates it into the primary role, which is a seamless transition unless something goes wrong, and then the new hot spare takes over again within a second. Once they're sure the software is working, they can update the other CPUs. Before any of this, new software is tested on identical hardware set up on the ground with physics simulations.

See also, "Solar Probe Plus Flight Software - An Overview" from http://flightsoftware.jhuapl.edu/files/_site/workshops/2015/

It seems like you want to discredit NASA now ("shouldn't melt") vs some imagined possibility("won't melt" but it does). With the amount of design, analysis, testing, and independent review and verification of the systems, backup systems, triply redundant systems, and autonomy, we can be as sure of it not melting as we can be sure of anything. And we certainly spent a large amount of money on this (about 1/10th of the World Cup), but in performance and value per $, it's a great deal.

(former software engineer on PSP here) It's a certainty that it will melt eventually, but that's not a satisfying answer to the question "why won't it melt?" The satisfying answer is "for the time period when it won't melt, it won't melt because of..."

It's been a traditional at JPL (and other NASA centers) to wear matching polos for quite some time now, at least years, before the Rosetta landing. Not saying that NASA is better than ESA as far as women or PR goes, but this wasn't a reactionary move.

Is that an actual quote within your quotation marks? Or are you creating your own straw man and attributing it to them?

It appears to be a photo post (i.e. images uploaded to FB natively) as opposed to a link post, where FB chooses a thumbnail for you (or not, if it's a YouTube link). I've been seeing posts like this when friends upload image albums (if more than 4 images, you get a 'see more' box in the lower right)

Very cool! I've forwarded this on to a few members of the NH software team

As someone tech-savvy and having used WireShark, even, I'm curious to know from my sibling commenters, what are you thinking? Of course you start by buying hardware or modifying a router. Parent comment is specifically asking for "good information" and something that "clearly defines how this is done." IMO, xfalcox and lewiseason come closest to actually answering the question, because their links mention specific software.

But simply installing software isn't enough, it needs to be configured. How does one set up OpenWRT or WireShark to filter for this kind of information? What pitfalls might one encounter? Do you need a CS degree in order to interpret the data? What keywords should one use when searching for more information?

With vague answers like the ones so far, you're just making it seem more difficult and intimidating for anyone that has little to no experience in this area. If we want people to be more concerned about their privacy, it needs to be as easy (or easier) for people to take control of their information as it is for them to give it away.

Edit: smtddr has the right idea, thumbs up. Should have hit refresh one more time before posting.

I'll repost an answer I gave elsewhere[1]:

See the "Guidance and Control" and "Communications" section of the NH Spacecraft Systems page for a detailed answer. > The short version is that it uses a combination of star trackers and IMUs (Inertial Measurement Units). The star trackers analyze pictures of the surrounding star field to determine how it is pointing instantaneously, and the IMUs track how it is rotating in between each of those instants. This determines the attitude (which way it is pointing). For position determination, "ranging" tones are sent from the earth and echoed back by the craft. This combined with the angle that the dish is pointing at to get the strongest signal tells the operators where the craft is in space. This information is fed back to the craft, which has an on- board physics simulation, and predicts where it will be until the next ranging event. > Now, you might have noticed that I didn't mention Pluto once. That is because this system (minus the exact details) is used by pretty much every spacecraft, from those around Earth, to New Horizons, and beyond.

[1] https://www.reddit.com/r/space/comments/3cz66a/new_horizons_...

Source on that? Even the Tajectory Correction Maneuvers (TCMs) are planned in advance, and it's just the details of the TCM that are finalized in the lead-up to those events.

As far as the final approach goes, the core sequence started July 7[1], and no adjustments were made to it. They even had a TCM opportunity before that in case of a possible collision, that I heard was skipped.

[1] http://www.spaceflight101.com/new-horizons-encounter-timelin...

Except there is an atmosphere...

Here's some information on LORRI.

http://pluto.jhuapl.edu/soc/lorri_about.html

https://books.google.com/books?id=oZfpYIUKDrUC&pg=PA11&dq=ne...

It's not like these copies replace the higher-res ones. Not a project scientist, but I'd rather as many people as possible see some image than only a few see only any at all.

It will take months to transfer the full data sets back. The data are formatted in ITF packets, inside CCSDS packets, inside CCSDS transfer frames.

[0] http://public.ccsds.org/publications/BlueBooks.aspx [1] http://www.boulder.swri.edu/pkb/ssr/ssr-fountain.pdf [2] https://books.google.com/books?id=oZfpYIUKDrUC&pg=PA347&lpg=...

And we're still not flying memory sticks (but we are flying more memory than ever before). Fun fact: New Horizons has no file system on its recorder, but current missions at APL now do.

http://flightsoftware.jhuapl.edu/files/2012/FSW12_Mick.pdf

The main command and data handling processor runs code written in C, as does the guidance and control computer. However, the G&C algorithms were 'written' in Simulink, and autocoded to C. I believe the instruments also use C, unless they are too resource constrained even for that, in which case, I'd guess Forth.

He didn't have a hunch, he just knew that the standard comprehensive test was skipped, which is why the standard test procedure only detected a problem, and he had to end early and go off book in order to reveal the doppler problem.

I don't see anything there (under favorites or subscriptions), but I didn't expect to, either, since I was never asked to log in.

It would be very nice, though, to be able to add videos from my subscriptions to my watch later list, and then watch that playlist while being able to reorder/remove videos.

Embarrassing that Bloomberg doesn't seem to know this.

I try to do the same thing in lectures. Unless I'm late or the lecturer is a particularly fast talker, I can usually process the information to the point where I'm writing my current understanding in my own words. Much better for me than taking dictation for an hour.

I think an important distinction is that he was not completely idle, as in playing cards, but solving a problem, albeit one with no clear relevance to anything.

Limited budget is certainly a big reason, and another is the lack of a pipeline. When Apple releases a new iPhone every other year, it's not like they started development on the next model only after the current one is released. Development is staggered so that there is always something at each stage of development.

As it says in the article, they will be leveraging proven technologies, but have not yet solicited proposals for instruments. This means they are still at the very beginning of the development process, and more money would only help so much. That's why the planetary.org post says that a higher budget would only move the launch date up 2 years. If they had started on a new rover 6 years ago with adequate funding, then we could be looking at a new rover in a year.

For a start...

* Operating their current missions http://www.nasa.gov/missions/current/index.html

* Designing and building future missions http://www.nasa.gov/missions/future/index.html

* Public outreach/education

Very cool concept and enjoyable game, but it caused the Iceweasel 'plugin-container' on my laptop to use over 200% CPU, which I'm guessing is related to the circuit breaker flipping (twice). Running Crunchbang 11 on a Dell Latitude E6410...

Edit: And took me from somewhere near 100% battery to 67%. Crazy

For the things it can do, yes, it is very good. It's not a general-purpose login, so of course there will be things you can't do (like uninstall things). But the things you can do cover most things:

* Install/update programs via Ninite * Install Windows updates * Any screenshot they take with Soluto (F8) get automatically sent to you with system runtime information * Enable/disable/delay programs during startup (delaying them means Soluto starts them after you have a usable system) * Enable/disable web browser extensions * View hardware and driver information

I imagine a spammer could generate plausible emails and then check them against SMTP servers to discover the valid ones if they didn't get blacklisted.

Unclassified/For Official Use Only. Basically means that it's not Secret, but still can't be distributed without permission. Different organizations have different discipline structures around leaking FOUO material, but I don't think there are any legal implications.

It started out as targeted towards very tech savvy users (i.e. most HN users, including me), but recently they added a feature where you can manage the computers of your friends and family through their web site, which I am doing for my parents and brother. Just yesterday I got an email saying my mom installed the "AOL Toolbar" Firefox extension. I asked her if this was intentional, she said no, and with 1 click, I disabled it. I'm not affiliated with it in any way, just a happy user (although 90% of the time, I don't think about it)

Go to space companies and apply for positions with "avionics" in the title. It'll be a mix of people from software and hardware backgrounds, but everyone deals with hardware on a low level.

Most people will just click yes or no to get past this screen. Better to ask "What iPad device are you using?" With options (with pictures?) of "iPad Mini" and "iPad 1/2/3"