Data from the light ion mass spectrometer (LIMS) on the SCATHA satellite is used to study the low-energy (<100 eV) plasma populations at a near-geosynchronous orbit. The characteristics of the plasma in the noon to midnight sector during quiet to moderately acctive times are emphasized. The observed plasm populations tended to group into three distinct types. These were a warm trapped distribution, a warm field-aligned distribution, and a distribution with kTi<1 eV. The cold plasma was seen after 1800 LT during periods of magnetic quiet and was observed to be flowing sunward during active periods. The cold plasma is identified as encounters with the plasmasphere, while the warm plasma populations are assumed to lie outside of the plasmasphere in the plasma trough. The presence of these warm plasma populations may be responsible for the difference in the shape of the bulge-region plasmasphere deduced from whistler measurements (Carpenter, 1966) and from in situ measurements made on OGO 5 (Chappell et al., 1970). The effects of the spacecraft potential upon the low-energy plasma measurement is studied. A threshold effect may be operative whereby when the cold plasma density decreases to less than about 2 ions/cm3, the spacecraft potential rises to a positive value such that cold plasma fluxes are effectively excluded from detection.