[meteorite-list] Source for small display cases?

From: Michael Gilmer <michael_w_gilmer_at_meteoritecentral.com>
Date: Mon, 11 Feb 2008 07:25:24 -0800 (PST)
Message-ID: <862895.82746.qm_at_web58415.mail.re3.yahoo.com>

Hi Everyone!

Can anyone share a source for clear plastic/acrylic
display cases that is reasonably-priced and takes
PayPal? I'm looking for something bigger than the
gem jars used for micromounts, but smaller than the
typical large cases used for some collectibles like
model cars. What would be ideal is a large gem jar
with a diameter of about 3 inches and a height/depth
of 3 inches, give or take.

I've looked all over the web, and I can only find
overpriced offerings or sites that don't take PayPal.

I have to use PayPal to keep my collecting seperate
from the household money and avoid the wrath of the
CFO. ;)

Thanks in advance!

MikeG

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----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 8 Feb 2008 17:06:43 -0800 (PST)
> From: Ron Baalke <baalke at zagami.jpl.nasa.gov>
> Subject: [meteorite-list] Mars Exploration Rover
> Update - February 6,
> 2008
> To: meteorite-list at meteoritecentral.com (Meteorite
> Mailing List)
> Message-ID:
> <200802090106.RAA17029 at zagami.jpl.nasa.gov>
> Content-Type: text/plain; charset=us-ascii
>
>
>
http://marsrovers.jpl.nasa.gov/mission/status.html#opportunity
>
> OPPORTUNITY UPDATE: Still Grinding After All These
> Years -
> sol 1389-1395, Feb 06, 2008:
>
> With only about a month remaining before
> Opportunity's fourth
> anniversary (in Earth years) of Mars exploration,
> NASA's robotic
> geologist is still grinding into the surface of
> rocks to unlock the
> secrets of their interior chemistry. Meanwhile, fall
> arrived in the
> southern hemisphere of Mars on Dec. 9, 2007,
> Opportunity's 1,378th
> Martian day, or sol, of exploration of the Red
> Planet. Ten days later,
> Earth made its closest approach to Mars, coming
> within 88 million
> kilometers (54.8 million miles).
>
> Opportunity used the rock abrasion tool to bore a
> shallow hole into a
> rock target known as "Lyell_1" and then spent about
> 70 hours integrating
> data about iron minerals inside the rock using the
> Moessbauer spectrometer.
>
> During integration with the Moessbauer spectrometer,
> the rover adds
> measurements in a running total, sort of like
> exposing film. A longer
> exposure builds up the light areas, improves
> contrast, and results in a
> clearer, more distinct image, whereas a shorter
> exposure produces an
> image that is somewhat underexposed, darker, and
> less well defined.
> Similarly, longer integrations with the Moessbauer
> spectrometer yield
> more distinct signatures of iron content and the
> chemical state of the
> iron.
>
> At the end of the Moessbauer campaign, Opportunity
> re-positioned the
> robotic arm to take images of the grind hole. The
> rover's handlers
> postponed acquiring images until after the holidays.
> On sol 1395 (Dec.
> 27, 2007), Opportunity acquired a mosaic of
> microscopic images of the
> ground rock surface before placing the
> alpha-particle X-ray spectrometer
> on a new rock target known as "Lyell_2." The
> resulting 2-by-2-by-14
> mosaic was a collection of microscopic images
> arranged side-by-side like
> the four windowpanes in a square window. Within each
> of the four panes,
> Opportunity took 14 microscopic images at various
> distances from the
> rock surface. Because the microscopic imager is a
> fixed-focus camera,
> this process of acquiring images at different
> heights enables the rover
> to obtain images with different focal points.
> Because engineers don't
> always know where the best focus point will be, they
> start high, move
> closer, and finish low. Ideally, the middle pictures
> will be perfectly
> focused and higher and lower images will be slightly
> fuzzy.
>
> Usually, the rover takes a stack of five microscopic
> images. This time,
> however, Opportunity took one image up high, one
> image down low, and
> four images at each of the three intervening
> heights. The multiple
> images will allow image processing experts to
> determine a digital
> average and cancel out unwanted data, known as
> "noise" to engineers.
>
> In addition to studies using the Moessbauer and
> alpha-particle X-ray
> spectrometers, Opportunity conducted routine
> atmospheric tests,
> acquiring so-called Tau measurements of atmospheric
> dust with the
> panoramic camera. The rover took additional
> panoramic camera images of
> the immediate area using multiple filters. By
> combining images taken
> with different filters, engineers can create both
> true- and false-color
> views.
>
> Following is a typical sol in the life of the
> Opportunity rover: Each
> Martian day is divided into blocks of activities
> separated by naps. The
> first block, known as the "engineering block,"
> begins when sunlight is
> strongest and temperatures are warmest. This is when
> the rover performs
> the bulk of the day's activities, including drives
> and housekeeping
> activities such as arm movements. After this,
> Opportunity takes a "nap"
> with no activities to allow the early afternoon sun
> to recharge the
> rover batteries.
>
> In the late afternoon, the rover wakes up for a
> communication session
> with the orbiting Odyssey spacecraft. This period is
> known as the
> "Odyssey block" and involves "pre-Odyssey,"
> "Odyssey," and
> "post-Odyssey" activities. Afterward, the rover naps
> or goes into a deep
> sleep. During deep sleep, the rover shuts off power
> to almost everything
> on board. The following morning, the rover may wake
> up autonomously if
> there is enough solar power -- this time period is
> called "solar array
> wakeup." During this block, engineers usually
> schedule one or two small
> activities, followed by another nap to recharge the
> batteries.
=== message truncated ===



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Received on Mon 11 Feb 2008 10:25:24 AM PST