Citizen Scientist Data Entry

Please enter the science data about your #shadowbands video on this form. Press the "submit" button when done.

Citizen Scientist Contact Info
Name
City
State
Email

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My #shadowbands Video
Video URL

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The Video URL is the web address where you posted your #shadowbands video.

August 21, 2017 Eclipse Observation

Click on this map to set the required GPS position.

GPS Latitude ° Latitude
GPS Longitude ° Longitude
Local Elevation meters above local ground level (not sea level)
Timezone
Nearest City
State
White Surface
Width meters
Height meters
Tilt ° Altitude
Facing ° Azimuth
Material
Tilt
Also known as Altitude, the angle that the normal vector is tilted upwards from the horizon.
For example, -90°=Down, 0°=Level, and +90°=Up.
Facing
Also known as Azimuth, the true direction that the normal vector makes on a compass, not the magnetic direction.
For example, 0°=North, 90°=East, 180°=South, and 270°=West.
Normal Vector
The direction perpendicular to a plane, facing outwards.
For example, a vertical South-facing wall has Altitude=0° and Azimuth=180°.
Video Camera or Cellphone
Make
Model
Lens Focal Length mm (if known)
Frame Width Pixels
Frame Height Pixels
Resolution Megapixels
Tilt ° Altitude
Facing ° Azimuth
Focus (Auto or Manual?)
EV Compensation [+/-] exposure value

Usually the camera facing is about 180° away from the white surface facing.

Weather

We want to know how wind and temperature affect #shadowbands. Please measure the weather just after at first contact (C1), and again just after third contact (C3).

Weather Before Eclipse (After C1)
Wind Direction ° Azimuth
Wind Speed knots
Air Temperature °F
Weather After Totality (After C3)
Wind Direction ° Azimuth
Wind Speed knots
Air Temperature °F

The wind direction is the compass direction that the wind is coming from. Please show wind ribbons in the #shadowbands video to measure local wind speed and direction. To make wind ribbons, just tie some long ribbons on a long stick so they can blow in the wind.

Visual Observations
Did you see #shadowbands by eye?
What colors did you see in the #shadowbands?
Completion
Any Comments?
What is + ?

About knomon.com

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What is a knomon?

A knomon is a pinhole gnomon.

A gnomon casts a shadow, and is the central post on a sundial. A gnomon has limited precision because its shadow fades quickly with distance. A gnomon casts an umbra, just like the moon casts an umbra during a solar eclipse.

A knomon casts a cone of light. The cone of light can be cast much further into a large dark room to make a very precise sundial. Put a piece of white paper in the cone of light to safely observe partial eclipses and even sunspots! A knomon is useful for finding local noon and true North.

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