RADZONE - Ephin levels (in any of the E1300,P4GM,P41GM channels) are more than 1/3 of RADMON safing thresholds.
    RADMON - Radmon is disabled for radiation zone (for comparison with actual radiation levels).
    SCA00 - Ephin SCA00 channel is saturated (@8372224). (data currently available only since Nov.2001)
    PERIGEE - Time of closest earth approach (for comparison).