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Exploring the outer Solar System with Django

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but the of the time and the and the and the Holy the thank you and thank you for coming my talk I work on a project called opens it's a search interface that further that people use to find the data and images from NASA space probe missions to the outer solar system and its button jingo and talk a little bit about why we built it in some of the ways people using it and all demo it as well so I work
at Institute in Mountain View California as SAT stands for the search for extraterrestrial intelligence and it started in 1984 as a NASA project to use radio observatories to listen for signals from other star systems that may indicate signs of intelligent life and so today 30 years
later said he runs its own up to it well that's really observatory and and the city project is still going strong but it's also a larger research center where is the base of operations for over 60 scientists and their students and staff who studied in many areas of planetary science such as planetary geology Astrid research of planetary dynamics exoplanets so basically anything related to the study of life and habitability in the universe so I couldn't say the it was a mass of the donor archive and then our scientific leadership of the experts in planetary ring systems so many people are aware that side has these epic beautiful
regions but a lot of people don't realize that Jupiter Neptune and Uranus actually have wheels as well and these are some pictures of them and so we had the rings node archived data for missions to these planets and we support researchers in this field so we built
at this time in finance that tradition we get it back to open standards for the outer planets unified search and the idea is that when you OK so when you have a we think that several nations into the simple interface so like we unify them on stage when demo it for you
so so this is an painting ironically it sort of my least favorite part of the face because it's just a little bit complicated when the 1st land on it will serve primarily of the scientific research community and it has a lot of features and options and has low specialized features so I can do other complicated my sort of bad joke is that it looks like the DMV form but the idea is that you start with a lot of results on so that you can access orientated is entirely database so that you can buy at the top there is a number if you can see that and that's telling you that there were input to move results that you can access right now and that this account of everything that database so for this tool we archive the complete set of remote sensing observations for several NASA missions both Voyager probes uh Cassini Galileo New Horizons and there's some data in here as well and so the idea is that you want to know how down your result counts to find the data that you looking for what you wanna learn about an interface gives you feedback and as you saw drill down into the data based on the left side and those this amounts to a list of parameters and if you click 1 of those it brings in a search region that amount to search widgets shown by default in the center so the brain search widget based on the number of parameters and you can use those to constrain the search so all sharing the other and click Jupiter and the 1st thing you might notice is that a list opens with lower I clicked so that is actually a a list of Jupiter's moons so when you click 1 the planets you give you that I'm a list of its targets on its moons or really features will open and lets you sort of drill down further and then you happened is that the number on the top and got a lot smaller because you basically saying show me the results tagged Jupiter and so clicking Browse results to see what we get
and you get this of gallery of space images that is for every 1 influence quality so the
deflowering of this interface is ascending time so what we're
actually seeing here it is and of these observations in a database and this is Voyager 1 as a 1st opens
its of camera shutter and images the planet voyager on its approach to Voyager
so the voyager mission is actually 2 spacecraft that identical there and just a few months apart in the late seventies the and they both have original mission of just going to Jupiter and Saturn but the both extended the Mission's far beyond what you bring up the 2 has actually gone on to Uranus and Neptune and one-to-one the space at these images has actually left the solar system becoming humanity's 1st interstellar probe so you can definitely infinitely scroll here but you can also jump to pages so there's a little input at the top and until to about 5
pages with words and also forward in
time so now Voyager 1 is
much closer to our Jupiter and it's taking this course of images
of Jupiter's atmosphere and the very strange textures of its
storms and its turbulent atmosphere so I should think a little bit about these these galley
thumbnails because there and if you can pick
up the code here they actually green and purple and blue so Space Imaging curious are actually black-and-white cameras most often you can collect a lot more information and every pixel with the black-and-white camera and so and each of these terms has color filters that the use filter wheels so they can drop in filtering for the camera and that they pick up light at different wavelengths of different colors that that when we get the images back on the ground without any special processing that actually grayscale or black-and-white images so for this gallery we actually a false color tinting I'm just as an indicator to the user of what filter was used in the observation as a quick way to see and also tell you a little bit later about why that's helpful so this is a different
search I've done a thing that could satellites of Jupiter and I
skipped a page 700 just to get forward in time will be here and the only thing you might notice is that the number is much larger than that of the result count is much larger than it was for jupiter that's because most of the images of a database actually of Saturn and that's because of the Cassini mission so the consideration the Cassini spacecraft launched 20 years after the wages laughter and unlike edges which a flyby missions to see is actually an orbiter so that went into orbit around Saturn and be completed over 220 orbits and it is this
crazy 1 that's so this is a diagram of the liberal path of Cassini you can see it slows way close to the planet and way find out and what it's doing is it's trying to image the ring system because of very vast system and also Saturn has over 60 moons and so the planets orbits to fly very close to some of the members of the class of images of meanings and then convert close to the planet to get images of the atmosphere and close views of the ratings so 1 thing I love about casino in in
terms of this interface it is it's a very stable platform for imaging cameras so when Cassini focuses on a thing it's very good at keeping the method in the center of the frame and so as you browse Cassini images you can see that many of them kind of look like frames of a movie and so on so this is
a sequence where the Cassini is looking at the time I in the center and if you assume you can click and see a larger region if you can't just if you have a good Internet connection and you hold on the right and you can kind of get this like firemen Russian movie facts and there's no money for things like this where there's just an interesting movie sequences that that you can check out that people are using this they're they're making phone animation movies and music beds and they got really creative there glued together in and videos without having to do extra processing work to stabilize the single in the frame because if I should mention this is a j query plugin called call box that does a really nice job preloading the next image from so we
go back to the face uh and show really common use case switches to search by instrument and that just means you once you wanted to the particular camera on a particular spacecraft so when we do here is I'm bringing the instrument on which it and pick new rise there is there something interesting I can show you here neutralizes what to Jupiter and pick the moon I from the list and here's a bunch of pictures of the and
so on cycle lost her
some the so this interface is actually a shopping cart so you can sort of pick images you want and you can do things with them you can download a C and B you can create a zip
file is so this is sort of the view of what's in the cart and you can interact with the images here as you sort of wood in the gallery
and so what that does to be a sequence of images so that people know where New Horizons because it just to Pluto and like our 1st of coercive of images of Pluto we never knew what fluid before but also really interesting character at Jupiter lots of things happened I'm so what we have all the Jupiter images and when the clue images come back down in a release to the public will have all of those 2 so if you can see this on meeting here where there's a little bit about the time looks like a fountain that could break that's actually volcano exploded just as neutralizes was taking pictures of it you know I knew this would be happening the plan these pictures to take pictures of Ohio and him was a volcano exploding at that moment so from that sequence we get our
1st and only existing fragmentation of the of a volcano erupting on another world
so and so so that's a little bit closer that is a 200 mile high plume the volcanoes in this vast are it's actually over the horizon a little bit so you're just saying that the edge of it at the top of it so behind we
do this right we build opens the challenge was that people researching outer planets and especially people study in a in systems were having to do a lot of extra work in order to get the data that they needed and this relates to the fact that space
missions are enormous collaborations it a spacecraft we need we attach a lot of instruments to every spacecraft that goes in the space and here is an example the Cassini
spacecraft so there's very specialized instruments terrorist telescopes spectrometers and each instrument has its own team of people that work just the build instrument and get the data back and the shepherd the data back back to Earth and new on their own websites and NASA has a standard for how the data is on the and the 2 is mostly following that I want to know what we're seeing is that people had to do a lot of different search you different websites and a lot about instruments and order to work with the data and this caused frustration so
we wanted to address this pain point we want to create a single interface that would
serve a larger swath of researchers and this and we try to make it easy to use so who
uses scientists use it there's many ways in which it so sometimes time and I'll give you just 1 example of a parameter that of people who study Windows systems are particularly interested in and which of its obviously it's easier easier to explore and there is a phase angle
so phase angle is just a way of quantifying the angle of light in the photograph so if you're taking a picture and the light is coming from behind you know a local phase angle and if you take a picture the light is coming from in front of you so that the thing you're taking the picture is backlit that high phase angle so right here you see 2 pictures of Saturn that both of Saturn the top image is that high phase angle of Saturn is backward and abundant Saturn is up is a linear phase angle image so that just had the light is through from behind the camera and all this is sort of the bad news Most what we're used to seeing from ground-based telescopes where the sun is behind the camera on energy considerations look very very different at different lighting angles so just by changing of the lighting and all you can just you can change what you pick up in the ratings and this and this sort of research allows people to live a lot more about the rose by looking at them at different lighting angles and I'm not sure if you can tell the top image there's like a simple wide really failed cloudy is sort of a diffuse ring so the but that doesn't even appear at all in the bottom image of them and that is actually that you hearing and casino discovered this this enormous range that's not part
of the rings and here's a close-up of the brightest part of that ring and there's a tiny moon the Enceladus and what Cassini found is that it's been so this is actually venting water ice from itself polar region and feeding this giant diffuse string so how do you do a physical
search on on the dual and there's understood dual against 7 so I pick out Saturn and then go into the Monster menu and under biting geometry there's a phase angle widget and each of them were just tell you sort of a hinting of what is what valid values so you don't have to know what are valid values so can just pick some high numbers 160 5 to 1 80 and the result that you get
is a very pretty globally but images of siding with values that are backlit several of these you can actually
see that you reading otherwise you couldn't see it and other images so the
scaled a little more than that right
whoops sorry there's a very bright pictures of the E ring and the time we got in there is Enceladus so not
only scientists use at our science journalists accuse occasionally occasionally use it so that the website predatory don't work you can find collections of these complete our composite images created by a senior editor of The Planetary Society and locked to Waller and she's actually scientists turn journalists and she creates these composite images that show based planetary bodies in the same image to show scale comparisons to teach and raise awareness about our solar system so she uses Opus looking for images of specific bodies at specific resolutions and specific phase angles and she tells me that making composite images like this would be 10 times harder without this toll another
community that uses that identified a community of people who create color versions of space probe images so space cameras was a black like parents and they had to the color filters and so if you can find it 3 images of the same scene taken without red green and blue filter with some Photoshop skills and so artistry you can make color versions of the spacecraft images and these are much like the
colors of the eyes might pick up if you review the scene directly if you out there with the spacecraft you it with your eyes so people like about this because I think I've got thumbnails are tilted making it easier just to find those RGB sets so
related to image processing information and there is a large fund IMAX movie coming out at temperature many now it's called in Saturn's rings on and it's really exclusively for real photographs taken by spacecraft and telescopes and so this is a CGI for this maybe there's no a 3 D rendering at all instead of processing over 7 and a half million photographs taken from various spacecraft and telescopes something a clip from there a late-summer teaser that they were released last
year and so during production they
used opus find a suitable image sets
to come to stitch together into
large scale parameters that have been made to create the effect
of flying through space around Saturn and so this thing is due out
later this year so number switch gears a little and talk about my favorite part of the interface which is the case all
this has a completely open Jason API and you can make requests over HTTP and adjacent response back so in research that can be performed in Opus interface can also be performed via an API call the URL structures are the same so what this means is that all the data and all the images that you can access using the interface you can also access from your own scripts from the shell from Python anything you want the you are in point socially example here's 1 of my
points on for this 1 I'm asking for data and I want to format J. Sun and I wanna do this query plan Saturn target equals Hyperion that's a moon of Saturn and you
get this nice well formatted Sun response and in this case you can also change the . J sign in the Ural 2 . CSV if you want to do that here's
another another 1 let's see what images so here asking for images size medium and I'm looking at the HTML response this time just so I can show you the pretty pictures and browser and it's the same query except I've added an imaging camera just to make sure we get actual images back up and so you get
a big list of Saturn's weird of spongy moon Hyperion if you go to their the you
viewer and shows that . html to
dodgy you get the same way as In J. Sun and only out of a list of direct links to all those images so
I want to find the API you go to the search face there's a link at the bottom and that gets you to a CAD documentation where we've on document how to use it and shows several examples about how to use it
so we can't time-domain team who budget and you know they had to get an answer so I didn't make it possible for us to accomplish a lot with very limited resources and I have to say on the Austin my silicate is that I've experienced the chain community the community to be such as support of QCD and welcoming to beginners because not so long ago I was also a beginner so thank you Austin during the community for being who you are and thank you to James commentators because we're making space images more accessible to scientists journalists artists developers and everyone and you make this possible the yeah you look
at it so I will I can take questions this session but it where the goal of so I noticed on the main page to adopt right and like the patronage was kind of a monster in designing the side of redesigning it specifically with sort of a scientist in mind or you're trying to the design a sort of an open public interface that was summer came along later were you realize that more people might wanna use them just for research so were funded to serve their scientific research community but my secret on agenda and the whole entire time is that I think anybody should be able to use it so I actually do work to make it an easy-to-use although that you know I have to weigh different on the issues that they i it's always been open and public uh in anybody can use it so I always thought also that sciences scientists deserve the same quality of tools as everyone else like they're not better at figuring out bad interactions than other people and so why not like tries so interest and so on so you have a lot of images was curious how do you handle so the mining storage and what best scale of image content China works like quite often found when you get so you know that many 100 thousand a Chinese salsa this the built-in media sources will downsize specially during the additional no it's like the daily cycle over a million I'm 2 7 0 OK of also find it I was curious talking about how there's a community of people who will put the RG and the other is the only way to do that automated since you are doing the tent or is it just a matter of like getting the proper registration marks so that you know your control points and direction where in the images right maybe maybe they're not referenced in such a way that you can do that remark I think there's some of that and I think there's also some judgment calls in how much of the cult each color you bring in answer sometimes you see colorize images and they're they're kind of false color they're not really where ya I would see technically and that's subjective anyway on say as I understand it there's a lot of judgment involved in that but I think a lot of things can be automated so who knows I find an answer to your question whether we actually do use memcached layer and to do these queries on but the images in the editors coming from a server and DOS self host or use some kind of called provider of to host all these of the country we sell 1st yeah cool yeah it's a it's a j Ingo mice well i j query on the friend Apache and then cash layer OK right thank you very thank the a half a mile from here on
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Formale Metadaten

Titel Exploring the outer Solar System with Django
Serientitel DjangoCon US 2015
Teil 15
Anzahl der Teile 46
Autor Ballard, Lisa
Mitwirkende Confreaks, LLC
Lizenz CC-Namensnennung 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/32764
Herausgeber DjangoCon US
Erscheinungsjahr 2015
Sprache Englisch

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Fachgebiet Informatik
Abstract I'm a web developer at the Planetary Rings Node, part of the NASA Planetary Data System. Our tiny shop is devoted to archiving, cataloging, and distributing scientific data sets relevant to planetary ring systems. Our base of operations is the SETI Institute, where a research community is busy searching for and studying life in the universe. At the Rings Node I develop and maintain an outer planets space mission data search tool called OPUS which is built with Django. It lets users search data, browse images, and access its API via http. I'll talk about some of the reasons for OPUS, some of the challenges we faced in building it out and porting it - from a hot mess of php - to what it is today, and I'll talk a little about our plans for the future. And we'll see some pretty pictures of the outer planets. :-D

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