Stimulated Emission of Energetic Particles (SEEP)

The SEEP detector was a sensor on the S81-1 satellite. This low-altitude (200 km) satellite measured the electron precipitation from the Earth's radiation belts that was caused by very low frequency (VLF) waves from lightning or controlled (human-produced) radio waves. The SEEP data is useful in the study of electron loss rates from the radiation belts, which includes whistler ducts and lightning-induced electron precipitation.

Below are some sample SEEP data from May 22, 1982.
Explanation of data screen:
The x-axis of the graphs is in frames. A frame is 256 bytes of data that are acquired every 64 ms. The numbers in the boxes "Start Frame" and "End Frame" are the frames where the x-axis starts and ends. The "Frames to Average" is the number of data points (one per frame) that are averaged (boxcar average) in one point shown on the graph. Each individual graph has up to four different colored lines on it.

Data from Lockheed-Martin:
Frames 46664-52569
Frames 49278-51106

Data from Stanford:
Frames 46664-47529
Frame 46668.6

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This page was last updated on July 1, 1997
Send comments to Dr. Bob Davis, Taylor University