Lecture Notes
Updated Wednesday, 21-Jan-2004 09:43:00 EST

Space Environment

c = 3 108 m/sec = 186,000 miles/sec

Common Name

Wavelength (l ), meters

radio

2-100 m.

microwaves (and radar)

0.01 -- 2 m.

light

10-6 m.

x-rays

10-10 m.

gamma rays

10-13 m.

Charged particles not deflected are trapped (green region) in magnetic field. This figure shows a cross-section of Earth's magnetic field.


Van Allen Radiation Belts (cross-sections)

green = proton belt (positively charged particles)

orange = electron belt (negatively charged particles)

(actually there are a number of belts, but only the two primary ones are shown here)

 

Copyright © 1998, Robert G. Melton

Updated Wednesday, 21-Jan-2004 09:43:00 EST