Sky and Telescope - January 2016 - 30
S&T: GREGG DINDERMAN, SOURCE: NATIONAL SOLAR OBSERVATORY
INNER-OUTER IMAGES: NASA / SOHO; MIDDLE IMAGE: JOHN BROWN & ROBERT ARNOLD
Citizen CATE
MISSING LINK This composite image of the March 2006 total solar eclipse combines outer-corona data from the Solar and
Heliospheric Observatory's LASCO C2 coronagraph (red), a white-light eclipse image taken from the ground, and an image of
the Sun itself from SOHO's Extreme-ultraviolet Imaging Telescope (blue).
Path
of T
ot al
ity
Aug
us t
21,
201
7
SOLAR RELAY The planned observing sites for the Citizen
CATE Experiment (yellow dots) are spaced to provide continuous observation of the solar corona as the Moon's shadow
whisks across the continent from Oregon to South Carolina.
Corporate Sponsors Needed
Two companies have generously contributed to the
Citizen CATE project. DayStar Filters will supply the telescope optical tube assemblies and neutral-density filters
for capturing partial phases. MathWorks has agreed to
provide software for image acquisition and processing,
as well as funding to cover equipment and other costs
for the project. The project has funds for about 35% of
a 60-site experiment and is seeking more sponsors to
make this unique citizen-science experiment a success.
30
Januar y 2016 sky & telescope
vast oceans, so establishing even just two or three sites
within the lunar shadow is a logistical challenge.
In contrast, the path of totality in 2017 will be accessible from thousands of convenient locations. In a 2012
paper titled "The U.S. Eclipse Megamovie in 2017,"
researchers Hugh Hudson, Scott McIntosh, and others explain how citizen scientists positioned at various
locations along totality's path could collect images of the
eclipse and combine them into a continuous video of the
event. The Citizen CATE Experiment builds on the ideas
introduced in that creative paper.
Instead of scattering themselves randomly across
the eclipse path, our observers will be positioned at
regular intervals, such that as the shadow of the Moon
leaves one observer, it will fall on the next one to the
east. In this way, Citizen CATE establishes a "relay race"
of coronal observations, with one group of observers
passing the baton to the next group every 2 minutes or
so. Alexandra Hart, an accomplished solar imager from
England, compiled the initial list of observing sites and
found that, after accounting for access, the effort will
require roughly 60 locations to assure continuous coverage or totality. After the eclipse ends, we'll align and
interleave the observers' images and then assemble them
into a continuous movie to reveal the dynamics of polar
plumes for a full 90 minutes.
Since the small community of professional solar
astronomers in the U.S. can't possibly staff 60 observing
sites, we'll rely heavily on the help of amateur astronomers (see the box on the facing page).
Sky and Telescope - January 2016
Table of Contents for the Digital Edition of Sky and Telescope - January 2016
Contents
Sky and Telescope - January 2016 - Cover1
Sky and Telescope - January 2016 - Cover2
Sky and Telescope - January 2016 - 1
Sky and Telescope - January 2016 - Contents
Sky and Telescope - January 2016 - 3
Sky and Telescope - January 2016 - 4
Sky and Telescope - January 2016 - 5
Sky and Telescope - January 2016 - A
Sky and Telescope - January 2016 - B
Sky and Telescope - January 2016 - 6
Sky and Telescope - January 2016 - 7
Sky and Telescope - January 2016 - 8
Sky and Telescope - January 2016 - 9
Sky and Telescope - January 2016 - 10
Sky and Telescope - January 2016 - 11
Sky and Telescope - January 2016 - 12
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Sky and Telescope - January 2016 - 81
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Sky and Telescope - January 2016 - 83
Sky and Telescope - January 2016 - 84
Sky and Telescope - January 2016 - Cover3
Sky and Telescope - January 2016 - Cover4
Sky and Telescope - January 2016 - S0
Sky and Telescope - January 2016 - S1
Sky and Telescope - January 2016 - S2
Sky and Telescope - January 2016 - S3
Sky and Telescope - January 2016 - S4
Sky and Telescope - January 2016 - S5
Sky and Telescope - January 2016 - S6
Sky and Telescope - January 2016 - S7
Sky and Telescope - January 2016 - S8
Sky and Telescope - January 2016 - S9
Sky and Telescope - January 2016 - S10
Sky and Telescope - January 2016 - S11
Sky and Telescope - January 2016 - S12
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