M104 Sombrero Galaxy

Saturday, October 8, 2016

Preparation for Eclipse 170821

Eclipse 170821 preparatory links:

Links to Ionosonde stations:

At USA National Geophysical Data Center NGDC :


Description of Ionograms:
Computation of ionospheric electron density from the black line plasma resonance frequency in ionograms


NumberElectronsPerCubicCentimeter =

1.24E4 * PlasmaResonanceFrequencyInMHz^2

Example, at 10 MHz , 1.2E6 electrons per cubic centimeter

At 4 MHz , about 1.9E5 electrons per cc

 Typical electron densities

Eclipse 170821 preparations - Study of Wallops Island Virginia WI937 VIPIR Ionograms

Example below from:

Ryan Hamel 978-934-4900 <>
Dr. Terry Bullett <>     links to VIPIR   describes NASA Wallops Island Flight Facility

Mirrion Ionosonde Data:


Eclipse 170821 preparations - Solar Eclipse Balloon launch from Carbondale Illinois, with Student participation

"...At 90,000 feet, the video camera will be able to see some 200 miles out toward the horizon. Guzik said it may be possible to see the moon’s shadow coming toward Carbondale at a distance, though the group will have little or no control over which way the camera is pointed at any given time..."

More Preparation for Eclipse 170821 :

NASA Eclipse Resources

From NASA's Education Message for May 11 :

"....On Aug. 21, 2017, the United States will experience a solar eclipse! This celestial event will provide a golden opportunity to engage and educate diverse audiences, and NASA has the resources to help.

Along a path 60 to 70 miles wide stretching from Oregon to South Carolina, observers will be able to see a total solar eclipse. Others across North America will see a partial eclipse. The event will happen around lunch time across the country. For an interactive map with timing information along the path of the eclipse, visit

Visit the following websites to find additional information and resources, including:
-- Tips for safely viewing the solar eclipse.
-- Recorded interviews with NASA scientists, mission specialists and eclipse path communities.
-- Topical online eclipse videos, featuring a variety of STEM and cultural topics.
-- Social media community development and networking.
-- Mobile educational eclipse applications.
-- Public challenges and engagement activities.
-- 2-D and 3-D printing exercises for K-16 students.
-- Citizen science campaigns in partnership with NASA mission observations.
-- Adjunct activities and educational resources.
-- Live streaming of observations and programming.

Total Eclipse 2017 -- Through the Eyes of NASA

Eclipses and Transits

Watch "The Solar Eclipse 2017 PREVIEW Show" with NASA EDGE.  ..."

Many thanks to NASA Education Messages.