Table 20 Most frequently observing modes for the icy satellites according to the major phases. Data rates and data volumes have been evaluated assuming 1140 spectral elements per frame (typical for satellite observations) and a target rate of 5 bits/data elements after compression. Actual data rates and data volumes will vary depending on the information content of the scene or the selection of a specific spectral table with a number of spectral elements different from 1140 (maximum number of spectral elements: 1280)
From: Moons and Jupiter Imaging Spectrometer (MAJIS) on Jupiter Icy Moons Explorer (JUICE)
Mission phase | JUICE Altitude (km) | Spatial binning | Spatial elements | Ground swath / ROI size (km) | Repetition time (s) | Duration | Data rate (Mbits/s) | Data Volume per line (Mbits) | S/C pointing / MAJIS science mode |
|---|---|---|---|---|---|---|---|---|---|
Flybys (Ganymede, Calisto, Europa) | 40000 | 1 | 400 | 2400 | 2.1 | 2100 s | 1.086 | 2280 | Yaw steering or S/C slew / Synchronized scan or pushbroom |
200 to 1000 | 1, 2, 4 | 400, 200, 100 | 12 × 4 to 60 × 80 | 0.6 | 15 s to 130 s | 0.95, 1.9, 3.8 | 14 to 500 | Pushbroom / Motion compensation | |
Satellite exospheres | 10000 km | 1 | 128 | 350 km Altitude range | 2 | 600 s | 0.36 | 110 | X axis parallel to the limb, Limb slew / scan mode |
GEO-1 1000 × 9200 km | 2470 to 2722 | 1 | 400 | 148 to 175 km | 0.6 | 616 s | 3.8 | 2340 | Yaw steering / pushbroom |
GCO5000 | 5100 | 4 | 100 | 300 km | 7.8 | ≤ 4.5 hr | 0.073 | ≤ 1180 | Yaw steering / Nominal pushbroom |
GEO-2 600 × 2000 km | 1900 to 2000 | 1 | 400 | 120 km | 0.6 | 1000 s | 3.8 | 3800 | Pushbroom / Motion compensation |
GCO500 | 500 | 1/2 | 400/200 | 30 × 7.5/30 × 15 | 0.6 | 60 s | 3.8/1.9 | 228/114 | Pushbroom / Motion compensation- |