Several observations of low-energy protons and electrons in the Earth's magnetosphere with OGO 3

Simultaneous observations of proton (190 eV < E < 48 keV) and electron (170 eV < E < 46 keV) d i f f e r e n t i a l energy spectrums during segments of t h r e e outbound t r a v e r s a l s of OW 3 through ---t h e magnetosphere f o r t h e period l l -1 5 June 196d0n L-shells 3.3 t o 16 are presented.1 5 June 1966 were 8 X 10 < cv 1.5 X 10 (cm -see-sr) -< 5 X 10 (a -sec-sr)-l (4.7 --< E < 7.6 keV) and 6 X 10 (cm -s e c -s r ) -l (16 < E < 26 keV) with l o c a l p i t c h angles 78" ( + -4") and at a geomagnetic l a t i t u d e 23O (+ lo).Peak i n t e n s i t i e s of protons (30 < E < 48 keV) were observed a t L --7.0.Proton i n t e n s i t i e s a t L = 4 on (cm -sec-sr)-' (330 --< E < 530 eV), 5 2 6 2 6 (cm -sec-sr)-' (4.7 --< E < 7.6 keV) and , < 10 (16 --< E < 26 keV) and a t L = 7.5 were (330 ,< E 5 530 eV), 4 X 106 2 -1 4 2 -1 (cm -see-sr) 2 6 2 --A preliminary -order-of-magnitude estimate of t h e t o t a l energy of trapped protons,/ (190 eV --< E < 48 keV) within t h e e a r t h ' s magnetosphere i s 5 x 1 O 2 l ergs and t h e estimated contribution from t h i s lowenergy proton d i s t r i b u t i o n t o the quiet-time t e r r e s t r i a l r i n g current f i e l d a t t h e e a r t h ' s surface i s --10 y .A t r a n s i e n t , narrow peak of r e l a t i v e l y high low-energy proton and e l e c t r o n & S A .