Observations of O++ by ISEE 1 have revealed occasional O++/O+ density ratios of the order of unity within the plasmasphere. However, most plasmaspheric O++/O+ density ratios are generally below 0.3. These ratios agree generally with those seen by GEOS 1. Within the plasmasphere the O++ population appears to be primarily cold and isotropic (as is typical for major ions). Outside the plasmasphere, O++/O+ field-aligned flux ratios may be of the order of 0.1--0.2, though they are frequently much smaller, and the O++ distributions are typically field aligned. A rare observation of a unidirectional conic in O++ is also reported.