Note that all data volumes & rates are based on powers of 10, i.e. 1Gbit = 109Â bits.
TM figures
| Allocated TM | 10.5 kbits/s | Â |
|---|---|---|
| Download capacity per orbit | 3.4 GB | = 27.2 Gbits |
Subtelescopes/units that can be commanded independently
| Â | wavelength | detector size | FOV | TM/raw image | compression rates |
|---|---|---|---|---|---|
| METIS_VL | polarized VL in 580-640nm (4 images) | 2048 px * 2048 px | annular FOV 1.5º-2.9º | 7.34 MB (14bit/px) | 13-50 |
| METIS_UV | 121.6nm (Ly_beta) | 1024 px * 1024 px | annular FOV 1.5º-2.9º | 1.84 MB (14bit/px) | 13-50 |
Full set of raw METIS images (4 VLs+1UV) accounts for 31.20MB.Â
If partially* rebinned and compressed (factor 2.5), a full METIS dataset accounts for 4.6MB to 16MB depending on the science goal.
* METIS images are rebinned differently in the inner band of the FOV as in the outer band: typically with binning factor 2 < 2.5º and 4 >2.5º for global corona and binning factors 2 < 2.5º and 4 >2.5º for smaller scale features like CMEs and oscillations
Observational modes
source:Â Metis user Manual Iss 3 (May 2016), tables 4.1.3.2-3
Main science programs
| Observing mode | Â | Use case | Telescope(s)Â | Cadence | Data Vol / set | Data Rate | Max Duration |
|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | (min) | (Mbits) | (kbits/s) | Â |
| METIS standard modes | Â | Â | Â | Â | Â | Â | Â |
| WIND | Â | electron density measurement and solar wind velocity <0.5AU (1.6 - 5 solar radii) | METIS_VL+UV | 5-30min | 14.12Mb (4VL+1UV) | 8 - 47 | days |
| Â | Â | Â | Â | Â | Â | Â | Â |
| MAGTOP | Â | slow wind source regions (magnetic topology) near perihelion (1.6 - 5 solar radii) | METIS_VL+UV | 5-20min | 23.34Mb (4VL+1UV) | 20 - 78 | days |
| Â | Â | Â | Â | Â | Â | Â | Â |
| GLOBAL |  | Global corona configuration/evolution during CME events close or far from sun, binning dependent on distance | METIS_VL+UV | 5-30min | 12Mb - 8Mb (4VL+1UV) | 4.5 - 40 | days  |
| Â | Â | Â | Â | Â | Â | Â | Â |
| LT-CONFIG | Â | Long-term evolution of coronal configuration close or far from sun, binning dependent on distance | METIS_VL+UV | 20-30min | 4.99Mb (4VL+1UV) | 2.8 - 4.2 | days |
| Â | Â | Â | Â | Â | Â | Â | Â |
| METIS special modes | Â | Â | Â | Â | Â | Â | Â |
|  | Brightness fluctuations spectra at perihelion only (1.6 to 3 solar radii) | METIS_VL only | 3 step acquisition, variable cadence: 1s - 20s - 10min  | 4.67Mb (1 VL image) | 311 (avg/hr) | hours | |
| Â | Â | Â | Â | Â | Â | Â | Â |
| CMEOBS | Â | CME driven shocks and SEP (filamentary structure) triggered by METIS-internal flag (at any distance) | METIS_VL+UV | 1-5min | 23.34Mb (4VL+1UV) | 77.8 - 389 | hours |
| Â | Â | Â | Â | Â | Â | Â | Â |
| COMET | Â | Mapping emission of sungrazing comets (at any distance) | METIS_VL+UV | 5-20min | 23.34Mb (4VL+1UV) | 20 - 78 | days |
| Â | Â | Â | Â | Â | Â | Â | Â |
| PROBE | Â | Coordinated observations with Solar Probe Plus (at any distance) | METIS_VL+UV | 5-30min | 19.85Mb (4VL+1UV) | 11 - 66 | days |
Engineering modes & power consumption
Source: METIS EIDB Iss 3.2 Tables 4.11-4.13 for power consumption incl. PDR margin.  -> to be updated
Power allocation for METIS is 28W
| Mode | Datarate: HK+LL+SCI (bps) | Avg Power consumption HOT / COLD (Watts) | Peak Power consumption HOT / COLD (Watts) |
|---|---|---|---|
| Â OFF | Â 0+0+0 | 0 | 0 |
| SAFEÂ | 50+0+0 | 13.8 / 15.7 | 19.5 / 22.2 |
| SETUPÂ | 50+0+0 | 16.8 / 18.2 | 25.7 / 28.3 |
| SWMÂ | 50?+0+0 | 13.8 / 15.7 | 19.5 / 22.2 |
| DIAGÂ (**) | 500+80?+see above | 28.5 / 29.9 | 40.3 / 42.9 |
| OPS(*) | 500+80+see above | 24.4 / 25.8 | 25.7 / 28.3 |
(*) All the observation modes are run in OPS engineering mode and consume the associated power.
(**) for diagnostics: similar to OPS mode but with IOM activation (extra 3.2W)