\documentclass[12pt,a4paper]{article}
\usepackage{pst-3dplot}
\usepackage{pst-pdf}
\begin{document}
% Andersrum:
% Definiere über phi und beta
% phi Kreisbogen von (a,0,a) nach (a cos phi, a sin phi, a)
% beta Kreisbogen von (a cos phi, a sin phi, a)
% nach P=(a cos phi cos beta, a sin phi cos beta, a + a sin beta)
% ^P ist bei (2a+Pz)/(2a-Pz)*(Px, Py, 0)
\def\PHI/{33}
\def\BETA/{30}
\def\A/{3}
\def\inner/{2}
\begin{pspicture}(-8,-8)(8,8)
 \psset{Alpha=75}
 \pstThreeDCoor[xMin=-4,xMax=4,yMin=-4,yMax=4,zMin=0,zMax=7,nameX=$x$ $\xi$,%
 nameY=$y$ $\eta$,nameZ=$\zeta$]
% \pstThreeDPlaneGrid(0,0)(4,4)
 \pstThreeDSphere[increment=45](0,0,\A/){\A/}
 \pstThreeDPut(0,0,0){S}
 \pstThreeDPut(0,0,\A/ 2 mul){N}
 \pstThreeDEllipse[beginAngle=0,endAngle=\PHI/,linecolor=green,%
 arrows=->](0,0,\A/)%
 (\inner/,0,0)%
 (0,\inner/,0)
 \nbput*{$\phi$}
 \pstThreeDEllipse[beginAngle=0,endAngle=\BETA/,%
 arrows=->]%
 (0,0,\A/)(\inner/ \PHI/ cos mul,\inner/ \PHI/ sin mul,0)%
   (0,0,\inner/)
   \nbput*{$\beta$}
 
   
% \pstThreeDDot[dotstyle=x,linecolor=red,drawCoor=true](1,-1,2)
\end{pspicture}
\end{document}

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