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Mission
Space Segment
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SGPS Requirements

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SGPS Requirements Chart

Parameter Current SGPS Specification PORD Requirement
Proton Energy Range 1 MeV to 500 MeV in 10 log bins plus >500 MeV Integral 151, 139
Flux Range (cm2-s-ster-keV)-1 (Min) 8x102 E-1.8 / >500 MeV = 4x102 151
Flux Range (cm2-s-ster-keV)-1 (Max) 5.4x109 E-2.1 / >500 MeV = 2x103 151
Differential Direct Energy Flux Accuracy 25% 144
Sensor Heads 2 Identical viewing in +X and -X 146
XY Sensor FOV <=90° Symmetric 146
XZ Sensor FOV <=90° Symmetric 146
Data Refresh Rate 1 minute (goal 1 second) 148
Noise < 10 keV for bands with threshold energy between 30 keV and 100 keV, <10% of band’s threshold energy at >100 keV 85, 86
Energy Band Stability <+3% 88
Size 26.6 cm, 26.6 cm, 12.6 cm CBE
Mass 4.9 kg CBE
Power 5.1 W CBE