Table 1
Galileo PLS Performance Parameters

Electrons
        Energy range: 0.9 V < E/Q < 52 kV

         Polar Angle     Energy Resolution,   Geometric Factor,+
       Sensor Coverage,  delta E/E at FWHM      cm2-sr-eV-eV-1
           theta (°)

1E          14°-41°            0.14              1.9 × 10-5
2E          38°-62°            0.12              3.7 × 10-5
3E          58°-80°            0.10              4.1 × 10-5
4E          81°-102°           0.08              5.0 × 10-5
5E         100°-122°           0.10              4.1 × 10-5
6E         121°-146°           0.12              3.6 × 10-5
7E         142°-171°           0.14              1.3 × 10-5

Positive Ions
        Energy range: 0.9 V < E/Q < 52 kV

1P*          9°-41°            0.15              9.8 × 10-5
2P          35°-59°            0.12              3.5 × 10-5
3P          62°-84°            0.09              4.1 × 10-5
4P          78°-99°            0.07              5.0 × 10-5
5P          97°-119°           0.09              4.0 × 10-5
6P         118°-141°           0.11              3.6 × 10-5
7P*        136°-166°           0.15              1.5 × 10-4

Ion Composition
        Energy range: Species dependent

        Differential (D) Sensor:        0.9 V to 20 kV (H+)
                                        0.9 V to 800 V (S+)
                       Resolves:        H+, H2+, He+, O+, Na+, S+, K+ with M/dM = 4.1

            Integral (I) Sensor:        10 V to 52 kV (H+)
                                        0.9 V to 14 kV (S+)
                       Resolves:        H+, H2+, He+, O+, S+, SO2+ with M/dM ~ 2.0

1MD*, 1MI   11°-38°             0.03             2.4 × 10-6
2MD*, 2MI   87°-93°             0.03             4.7 × 10-6
3MD*, 3MI  142°-169°            0.03             2.4 × 10-6

* 3-mm entrance diameter, others are 1 mm.
+ Preliminary values based upon ray tracing (see text).