CSIRO ASKAP Science Data Archive (CASDA)

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CSIRO ASKAP Science Data Archive (CASDA)
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CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Release Date
2015
Language
English

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Abstract
The CSIRO ASKAP Science Data Archive (CASDA) Project has been established to build and implement the archive at the Pawsey Centre and build the data transfer infrastructure required between MRO and Pawsey. The rates of data arriving at the Pawsey Centre are approximately 2.5 Gigabytes (GB) per second, equivalent to 75 Petabytes (PB) per year - hence the need for archiving. The best way to get a return on investment for this huge investment was to make the data open. Open data is crucial to getting the best science from your telescope - both original and derived science.
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Building Electric generator Spherical cap Multiplication sign
Point (geometry) Medical imaging Raw image format Supercomputer Form (programming)
File archiver Volume (thermodynamics)
Data management Programming paradigm Data quality
Uniform resource locator File archiver
Open set
Projective plane
Open set
State observer Patch (Unix) Projective plane File archiver Open set
File archiver
Multiplication sign Videoconferencing
as cap is a radio telescope that we're building in Western Australia it's a new generation of radio telescope which will be able to survey the whole sky to great depths and what we want to find out is how do galaxies evolve over time so the
data comes off the telescope in raw form and gets transmitted by optical fiber to the supercomputer Center in Perth at
that point the data gets processed and it gets converted into images of the sky and those images will be made available
to astronomers worldwide we've asked up
the data volumes are truly enormous and so to make it easier to archive it and
also to make it easier for the astronomers who are going to use it the data was actually processed quite a lot before it gets to be archived so that raises a new paradigm in a sense if you
want to be very sure that your data quality is very good
before you do archive it so the great
thing about archives is that you put the data in in a central location and then
anybody can get it from there the best way to get return on the investment of
this big telescope was to have completely open access data policy there
were two reasons we did this one is because of the internationalization of astronomy generally the sky is up there for anybody to look at the second reason
was we've got these big teams set up who
know the projects they want to do it's important to keep them honest it's
important that they publish and do the
stuff with the data they've got they can't just leave it languishing you know
for 10 years and then oh yes well maybe I'll do something was Daytona they can't
do that anymore because the data is freely available to anybody and somebody
might nip in and steal their idea Open
Data I think is really crucial to getting the best science from your telescope we're building a very expensive telescope and it's important that the best science gets done so let's say for example have a really good idea for a science project and I want to look at this patch of sky over here I go away and I look at it and I do my own thing then the data sits in the archive and somebody from somewhere else might have a another completely different idea to do with the same data patch they will go away extract the data from the archive have look at it do their own clever science and publish something completely different so therefore the same
observation you've got two pieces of clever science one piece that the original person never even thought of and so that's the really great advantage in having open access data the questions
that it can answer are maybe questions that you haven't even thought of yet and that that's I think the beauty of a data archive so I can carry out an experiment
to do what I want to do because I've had that idea but then maybe in the future you know science always moves on and there's always different things to do so
in the future somebody I'll have a completely different question that I haven't thought of and they can use that data to answer their questions they don't need to go back and take expensive telescope time they can just look at the data that exists already to help answer their questions
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