Table 1.

Instrument range and sensitivity corresponding to the requirements for the mission instruments. NRT: Near Real-Time. Detailed descriptions of the instruments are given in the text.

Requirements Range Sensitivity, rate Instrument name
Particle composition 0–50 amu 0.4 amu, 1 Hz NRT Ion and Neutral Mass Spectrometer (INMS)
On-board temperature −170 to +160 °C 1 °C, 1 Hz Thermistors
S/C acceleration 0–5 g 10−8 ms−2, 1 Hz Italian Spring Accelerometer (ISA)
Plasma velocity, temperature ~0.03–1.3 eV 16 Hz NRT Ion Velocity Meter (IVM)
Plasma density 109–1012 m−3 109 m−3, 1 Hz NRT multi-Needle Langmuir Probe (m-NLP)
Total electron content 3–300 TECU 3–5 TECU, 10 Hz Integrated GPS Occultation Receiver (IGOR)
Total electron content 3–300 TECU 1 TECU, 10 Hz S4 Radio tomography receiver (CITRIS)
Magnetic field ±80 μT 0.5 nT, 10 Hz NRT Fluxgate Magnetometer (FGM)

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