[meteorite-list] GIANT Lunar Download

From: Sean T. Murray <stm_at_meteoritecentral.com>
Date: Fri, 4 Mar 2011 19:21:45 -0500
Message-ID: <EB0738848F0449A694EC9733940AB4DF_at_PlatinumII>

It's a really nice image to zoom in and fly around the surface of the
moon... though, I did have some issues viewing the downloaded file. Did
anyone else get errors when opening the tiff? When I was able to get Paint
Shop Pro to open the file (1 out of 10 times, it would show the image), I
did notice some pixel block errors around the horizon. The file looks to be
the correct size, but I am going to try to download it again.

Sean

-----Original Message-----
From: Sterling K. Webb
Sent: Friday, March 04, 2011 3:17 PM
To: lebofsky at lpl.arizona.edu ; actionshooting at carolina.rr.com
Cc: meteoritelist meteoritelist
Subject: Re: [meteorite-list] GIANT Lunar Download

As a passionate downloader with archives of
downloaded material that exceed a total of
three terabytes (but growing every day), I can
tell you that speed at which you receive data
is affected by a variety of factors of which ISP
willingness is only one.

I know the maximum rate my provider can
and does supply me with, having done so
consistently when allowed by the source, a
hair under 4 Megabit/s (636 Kb/s). This
download would take 14.7 minutes at that
rate, but it's going to take (still downloading)
about 48 minutes.

Servers always parcel out downloads in a way
to optimize their own performance to the demand
and the nature of the requestor. For example,
if I were the server at asu.edu, I would see to
it that a requestor at lpl.arizona.edu got it as
fast as he wanted it, like say, 1000 Kb/s or so.
They correctly appraised that I was only worth
193 Kb/s... and they were right!

And Pete, you can (or should be able to) use
the computer for all other tasks (except a
competing giant download). You don't have
to suddenly become a "single-tasker" when
downloading.

Beautiful, isn't she? Those who don't want a
giant download and would be satisfied with a
good-sized jpeg under one Mb, can find it at:
http://apod.nasa.gov/apod/ap110303.html


Sterling K. Webb
------------------------------------------------------------
----- Original Message -----
From: <lebofsky at lpl.arizona.edu>
To: <actionshooting at carolina.rr.com>
Cc: "meteoritelist meteoritelist" <meteorite-list at meteoritecentral.com>
Sent: Friday, March 04, 2011 12:24 PM
Subject: Re: [meteorite-list] GIANT Lunar Download


It took me less than 10 minutes and you will be limited by how fast your
Internet provider download rate is (not what they claim).

Great image.

Larry

> I downloaded it last week and on Roadrunner it took <5 mins!!
>
> STuart.
>
> ---- Pete Pete <rsvp321 at hotmail.com> wrote:
>>
>> Hi, all,
>>
>> I suggest not trying to download unless you aren't needing your computer
>> for a while.
>> My computer is new, and it took about fifteen minutes.
>>
>> I think it is worth the time, if you appreciate our little buddy.
>>
>> Cheers,
>> Pete
>>
>>
>> http://www.skyandtelescope.com/news/116932598.html
>> http://www.skyandtelescope.com/news/116932598.html
>>
>>
>> A Half-Gigabyte View of the Moon
>>
>>
>> Ever since NASA's Lunar Reconnaissance Orbiter began circling the Moon
>> at low altitude in mid-2009, planetary scientists and the public have
>> marveled at the incredible trove of observations it's been beaming back
>> to Earth. Most often in the spotlight are the jaw-dropping closeups of
>> Apollo landing sites by the Lunar Reconnaissance Orbiter Camera (LROC).
>> It can resolve the surface at 2 feet (0.5 m) per pixel ??" good enough
>> to reveal even the paths worn in the lunar soil by the astronauts'
>> boots.
>>
>> A new 24,000-pixel-square mosaic from NASA's Lunar Reconnaissance
>> Orbiter shows the Moon's nearside as never before. Click here for a
>> larger (but not full-size!) version; a labeled version is here.
>> NASA / GSFC / Arizona State Univ.The work of LROC's wide-angle camera,
>> which provides surface context for those incredible narrow-angle shots,
>> has largely gone unheralded ??? until now. This past week the team
>> released a new mosaic of the Moon's near side taken entirely with
>> wide-angle frames. Acquired during a two-week period in December, the
>> 1,300 black-and-white frames create a full-disk mosaic measuring 24,000
>> pixels across. Gulp!
>> "As the Moon rotated under LRO's orbit," explains LROC team leader Mark
>> Robinson (Arizona State University), "the ground track progressed from
>> east to west (right to left in this mosaic)." The image run was timed to
>> keep the Sun high up in the lunar sky but not straight overhead (its
>> altitude varied from 69?? to 82??). This created enough shadowing to
>> define crater rims and other topography crisply, unlike the shadow-free
>> view that we see during a full Moon. The combined image shows slight
>> banding where the 1,024-pixel-wide swaths were stitched together.
>>
>> A close-up of Rupes Recta (usually called the Straight Wall) from the
>> new LROC mosaic of the lunar nearside. Located near the eastern edge of
>> Mare Nubium, this steep-faced scarp is about 70 miles (114 km) long.
>> NASA / GSFC / Arizona State Univ.Weighing in at just 2 pounds (0.9 kg),
>> LROC's wide-angle camera is small enough to fit in your hand. It
>> features an aperture only 1.2 mm across and a focal length of just 6 mm
>> (for visible-light work). Yet from LRO's very low orbit, currently only
>> 20 miles (30 km) up, this mighty mite can pick out surface details as
>> small as 250 feet (75 m). Click here to view the specifications for
>> LROC's wide- and narrow-angle cameras.
>> The image looks dark because Robinson and his team have kept the Moon as
>> it really is: dark. On average, the lunar surface reflects only about
>> 12% of the sunlight that strikes it. So a full Moon really isn't
>> dazzlingly bright ??" it only looks that way to our eyes because of the
>> contrast with the black sky around it.
>> If your computer's up to it, you can download the full half-gigabyte
>> mosaic here.
>>
>> ______________________________________________
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>
> --
> Stuart McDaniel
> Lawndale, NC
> ______________________________________________
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Received on Fri 04 Mar 2011 07:21:45 PM PST