SOHO-Extreme ultraviolet Imaging Telescope (EIT):
Coordinated observations for the total solar eclipse
of 1999 August 11

• Full-field EIT images during totality (roughly 1999 August 11 09:30 - 12:30 UT)

• EIT subfield images of a polar hole bracketing totality in Austria, in support of the HAO PEPPI experiment

• Full-field EIT synoptic images from the days immediately before the eclipse

• Full-field Fe XII 195 Å to Fe IX, X 171 Å ratio image from the synoptic observations during totality

• Full-field EIT synoptic images from after the eclipse

• Useful links to other eclipse-related Web pages

Observations during totality

Polar plume observations during totality

Click on the image of the first frame
for a GIF movie sequence

1999/08/11 10:35 - 10:55 UT

Pre-eclipse observations

• Images from August 10

• Images from August 11

EIT synoptic images, 1999 August 10

Click on any thumbnail image for a 1024 x 1024 GIF image.

171 Å	195 Å	284 Å	304 Å
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
01:00 UT	01:13 UT	01:06 UT	01:19 UT
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
07:00 UT	07:13 UT	07:06 UT	07:19 UT
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
13:00 UT	13:13 UT	13:06 UT	13:19 UT
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
19:00 UT	19:13 UT	19:06 UT	19:19 UT

EIT synoptic images, 1999 August 11

171 Å	195 Å	284 Å	304 Å
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
01:00 UT	01:13 UT	01:06 UT	01:19 UT
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
06:30 UT	06:43 UT	06:36 UT	06:49 UT
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
08:05 UT	08:18 UT	08:11 UT	08:24 UT

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Fe XII/Fe IX, X ratio images (temperature-sensitive)

Click on any thumbnail image for a 1024 x 1024 GIF image.

11:08/10:55 UT	11:42/11:48 UT	12:21/12:27 UT

Brighter is hotter (above 1.5 x 10⁶ K); darker is cooler (below 1.0 x 10⁶ K).

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Post-eclipse observations

171 Å	195 Å	284 Å	304 Å
512 x 512 image	512 x 512 image	512 x 512 image	512 x 512 image
19:00 UT	19:13 UT	19:06 UT	19:19 UT

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Other useful links

• LASCO and EIT observing plan for 1999 August 11, in tabular form

• LASCO Eclipse 99 page with images

• SOHO coordination page for eclipse support

• A composite white-light eclipse image (taken in Romania) and EIT He II 304 Å image, obtained just after 11:00 UT on 1999 August 11

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Web curator: Joseph B. Gurman
Responsible NASA official: Joseph B. Gurman, Facility Scientist, Solar Data Analysis Center
gurman@gsfc.nasa.gov
+1 301 286-4767

NASA Goddard Space Flight Center
Solar Physics Branch / Code 682
Greenbelt, MD 20771

Last revised - J.B. Gurman