TY - RPRT TI - The decrease in effective photocurrents due to saddle points in electrostatic potentials near differentially charged spacecraft AU - Mandell, M. J. AU - Katz, I. AU - Schnuelle, G. W. AU - Steen, P. G. AU - Roche, J. C. PY - 1978 UR - https://ntrs.nasa.gov/citations/19790046127 ID - 19790046127 ER -