Relationships among the harmonic coeffficients of scan plane anisotropies
Abstract
Frequently, a detector on a spinning spacecraft measures the flux of charged particles whose velocities lie in a plane containing the magnetic field. This flux may be Fourier analyzed as a function of the spacecraft roll angle. Relationships among the Fourier coefficients are derived using the adiabatic solution of the Vlasov equation. These relationships depend only on the fact that the lowest order (in gyroradius) of the distribution function is a function of the magnetic moment and that the firstorder term is a function of the lowest order. These relationships may be used to separate the proton from the electron counts registered in Saturn's inner magnetosphere by the University of California's Cerenkov counter on Pioneer 11.
 Publication:

Journal of Geophysical Research
 Pub Date:
 December 1985
 DOI:
 10.1029/JA090iA12p12081
 Bibcode:
 1985JGR....9012081N
 Keywords:

 Cerenkov Counters;
 Error Analysis;
 Harmonic Functions;
 Particle Flux Density;
 Roll;
 Spaceborne Telescopes;
 Distribution Functions;
 Electron Flux Density;
 Fourier Analysis;
 Magnetic Moments;
 Pioneer 11 Space Probe;
 Proton Flux Density;
 Saturn Atmosphere;
 Vlasov Equations