Detailed mode descriptions need updating for close/far mode.
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Note that all data volumes & rates are based on powers of 10, i.e. 1Gbit = 109Â bits.
TM Figures
| Allocated TM | 3.6 kbits/s | Â |
|---|---|---|
| Download capacity per orbit (168 Days) | 6.532 GB | = 52.254Gbits |
| SSMM allocation | Â | Â |
Operational Modes
Source: EPD Burst Mode Document (scheduled bursts), EPD Detailed Budgets Report 4.1
Mode | Data Rate (bps) | Duty Cycle (%) | Duty Cycle (hrs / orbit) | Orbital Volume (Gbits) |
|---|---|---|---|---|
| EPD Normal Mode | 3474.7 | 100% | 4032 | 50.440 |
| Scheduled Burst Mode | 5107 | 0.694% | 28 | 0.515 |
| Triggered Burst Mode | 89.5 | 100% | 4032 | 1.299 |
Note That HK and LL data are included in Normal Mode. Triggered mode is an average rate based on the available volume after normal mode and scheduled burst modes are taken into account, since no native rates are available.. the scheduled burst volume includes a 5% packetisation overhead that was not in the EPD documentation.
In any case EPD have the flexibility to alter cadences and data rates to steer their TM corridor, so these are representative rates rather than set in stone. These figures also do not include the proposed weighting of data towards perihelion.