Cassini MIMI Investigation at Fundamental Technologies
Historical MIMI Memos and Notes
Telemetry Modes and Allocations
(S. Jaskulek, MIMI team meeting, October 1994)
INCA PHA Events
16 PHA ranges (4 TOFs x 4 masses: H, He, [C,N,O], and Heavies)
For each event 2.5 16-bit words--> 40 bits:
| PHF: | 6 bits (6 MSB of the sum of 2 8-bit words) |
| PHR: | 6 bits (6 MSB of the sum of 3 8-bit words) |
| TOF: | 10 bits |
| Azimuth: | 6 bits |
| Elevation: | 6 bits |
| Coincidence: | 1 bit |
| Start & Stop: | 1 bit |
| Range: | 4 bits |
Organized on
the basis of: 6 PHA events x 16 ranges x 40 bits/event -->
3840 bits
(6 PHA events/range on the average, out of 24 available -->
2304 bytes alloc. mem.)
transmitted every 4 subsectors (21.56 s for nominal Pspin)
:
178.2 bits/s
Note: Eventual variations of the s/c rotation period during Spinning Mode will be taken into account by adjusting the 6 PHA events/range number, so as to maintain an approximately constant bit rate for INCA (per T/M mode).
INCA Accumulator Rates
8
accumulators (24 bits --> 12 bits log compressed each)
transmitted every subsector (5.391 s for nominal Pspin)
:
17.8 bits/s
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Updated 8/8/19, Cameron Crane
QUICK FACTS
Mission Duration: The Cassini-Huygens mission launched on October 15 1997, and ended on September 15 2017.
Destination: Cassini's destination was Saturn and its moons. The destination of the Huygens Probe's was Saturn's moon Titan.
Orbit: Cassini orbited Saturn for 13 years before diving between its rings and colliding with the planet on September 15th, 2017.