The Citizen Continental-America Telescopic Eclipse Experiment

CATE Network Practice Dates:

Next Solar Practice Runs:
08 & 09 July
22 & 23 July
05 & 06 Aug
12 & 13 Aug

Lunar Practice Run:
25 July


The CATE training workshops are over, and the equipment has been distributed to our CATE volunteers.

Next: we need to practice as a network.  Let's get all of our site volunteers to take at least one solar HDR image with their equipment on the weekends listed above, and upload your eight data files.

To test our day-of-eclipse HDR movie, we'll use an HDR image of the moon.  Each CATE site should plan to take an HDR image of the moon using the equipment and software on the evening of 25 July.

Don't limit yourself to practicing only on these dates: please use your equipment, software and the observing procedure to take sample data as often as you can.  

The solar eclipse will be the ultimate deadline: you must be ready to take data at exactly the start of totality; the eclipse will not wait! The only way to increase your odds of collecting data is to practice, practice, practice between now and the eclipse!

The Citizen CATE Experiment will use a fleet of telescopes to observe the total solar eclipse of 21 Aug 2017.  As the shadow of the moon travels across the continental USA, citizen astronomers from more than 68 sites will take images of the brightness of the inner solar corona.  While the totality phase of the eclipse will last only 2 minutes at each site, the combined Citizen CATE Experiment data set will reveal for the first time how this part of the solar atmosphere changes during 90 minutes. New scientific results about the dynamics of the magnetic fields and plasmas in this part of the solar corona will be derived from the data, and the image sequence will provide a beautiful perspective of the solar eclipse as never seen before.
Supported by:


  • First CATE paper: Results from 2015 and 2016! Our tests in 2015 and 2016 are discussed in this paper, as well as more details about our plans for 2017.  The paper is published with "Open Access" so that ...
    Posted Jan 12, 2017, 12:58 PM by Matt Penn
  • Eclipse 2016 Observations, Tanjung Pandan. Eclipse 2016 Observation Blog - Bob Baer. I traveled to Tanjung Pandan, Indonesia in March, 2016 to observe a total solar eclipse as part of the Citizen CATE Experiment. The observation ...
    Posted Aug 3, 2016, 7:41 AM by Bob Baer
  • Fourth Sponsor for Citizen CATE Experiment! colorMaker, Inc, a California corporation, has signed a letter of agreement with the NSO and AURA to become the fourth sponsor of the Citizen CATE Experiment.  colorMaker has agreed to ...
    Posted Apr 29, 2016, 10:54 AM by Matt Penn
  • Third Citizen CATE Experiment Sponsor! We're happy to announce that Celestron, LLC has signed a letter of agreement with the CATE.  Celestron will provide 60 CG4 German Equatorial Mounts and RA drive motors to ...
    Posted Feb 8, 2016, 1:44 PM by Matt Penn
  • Update for March Indonesian Eclipse Students traveled to Tucson for a two-day workshop on 14-15 January.  Here they assembled the telescopes, received training using the cameras and control computers, and then packed the ...
    Posted Jan 22, 2016, 1:46 PM by Matt Penn
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