TM figures
| Allocated TM | 17.5 kbits/s | |
|---|---|---|
| Download capacity per orbit | 5.670 GB | = 45.36Gbits (over 30 days) |
Subtelescopes/detectors
Source: SPICE User Manual Iss 5.0 (Nov 2014)
SPICE consists of only 1 spectral telescope with slit and scanning mirror. The 2D image (1 wavelength dimension, 1 spatial dimension along the slit) is projected on 2 detectors, 1 covering the long wavelengths, the other covering the short wavelengths.
| wavelength range | detector (readout) size | FOV | Volume/Detector readout | |
|---|---|---|---|---|
| SW array | (approx.) 70.1nm - 79.3nm | 968px @0.0095nm/pix x 800 px (along slit) | 11' (14' for 30" slit) x 16' | 1.55MB |
| LW array | (approx.) 97.1nm - 105.1nm | 968px @0.0083nm/pix x 800 px (along slit) | 11' (14' for 30" slit) x 16' | 1.55MB |
Selection of SPICE spectral lines
Source: SPICE User Manual Iss 5.0 (Nov 2014)
| Ion | Wavelength (Å) | Log T (K) | FIP (eV) | M/q |
|---|---|---|---|---|
H I | 1025 | 4.0 | 13.6 | -- |
| C II | 1036 | 4.3 | 11.3 | 12.0 |
| C III | 977 | 4.5 | 11.3 | 6.0 |
| O IV | 787.7 | 5.2 | 13.6 | 5.3 |
| O V | 760 | 5.4 | 13.6 | 4.0 |
| O VI | 1032 | 5.5 | 13.6 | 3.2 |
| S V | 1037 | 5.5 | 13.6 | 3.2 |
Ne VI | 786.5 | 5.2 | 10.36 | 8.0 |
| Ne VII | 1005 | 5.5 | 21.6 | 4.0 |
| Ne VIII | 973 | 5.6 | 21.6 | 3.3 |
| Ne VIII | 770 | 5.8 | 21.6 | 2.8 |
| Mg VIII | 772 | 5.9 | 7.7 | 3.4 |
| Mg IX | 706 | 6.0 | 7.7 | 3.0 |
| Mg XI | 997 | 6.2 | 7.7 | 2.4 |
| Si VII | 1049 | 5.6 | 8.1 | 4.8 |
| Si XII | 521 (2nd) | 6.5 | 8.1 | 2.6 |
| Fe X | 1028 | 6.0 | 7.9 | 6.2 |
| Fe XVIII | 975 | 6.9 | 7.9 | 3.3 |
| Fe XX | 721 | 7.0 | 7.9 | 2.9 |
Auxiliary lines:
| Ion | Wavelength (Å) | Log T (K) | FIP (eV) | M/q |
|---|---|---|---|---|
| Ne VIII | 780 | 5.8 | 21.6 | 2.8 |
| Si XII | 499 (2nd) | 6.5 | 8.1 | 2.6 |
Observational modes
Source: SPICE User Manual Iss 5.0 (Nov 2014)
SPICE has several observing modes, called studies:
| Observing mode | Use Case/Target | Line List | # repeats | Total Duration | Data Rate | Max time / orbit |
|---|---|---|---|---|---|---|
| (min) | (kbits/s) | |||||
| SPICE Spectral Atlas | Sun centre, limb, AR, CH | Full spectrum | 2 | 22 | 40.34 | |
= NOMINAL MODE 1 | Centre, Poles, limb, AR | 15 lines (2 profiles, 13 intensities) | 1 | 180 | 0.45 | |
=NOMINAL MODE 2 | Centre, AR, CH | H I, C III, O VI, NeVIII profiles | 10 | 110 | 20.46 | |
| SPICE Limb mode | Low corona above limb | C III, O VI, Ne VIII profiles | 1 | 240 | 2.5 | |
| SPICE CME Watch | AR, prominence, limb | 5 spectral profiles, 10 intensities | 30 | 22.66 hr | 4.46 | |
| SPICE 30"-wide Movie (sit&stare) | centre, AR | 1-2 line profiles | 1 | 10 | 34.44 | |
centre, AR | 1-2 line profiles | 40 | 16 | 20.28 | ||
| SPICE Waves mode (sit&stare) | QS, CH, AR | C III, O VI, NeVIII profiles | 5 | 300 | 50.72 | |
| SPICE Two-Exposure mode | combi of 6 bright and faint lines | 5 | 300 | 2.86 |
LowLatency or Precursor programs
SPICE plans to run a mini-study before the start of each new study, that is configured exactly like the science study but has lower resolution/cadence/slit width/... and produces ~0.1MB.
Special datasets
| Observing mode | Use Case/Target | Line List | Duration/dataset | Data Rate | Max time / orbit |
|---|---|---|---|---|---|
| few strong lines | 32 | 15.1 |
Engineering modes & power consumption
Source: SPICE User Manual Iss 5.0 Sect 4.3 (Nov '14) & SPICE detailed budget report Iss 3.0 (July '13)
Average Power allocation for SPICE is 30W
Mode | Datarate: HK+LL+SCI (bps) | Avg Power consumption (Watts) | Peak Power consumption (Watts) |
|---|---|---|---|
| OFF | 0 | 0 | 0 |
| STARTUP/BOOT | 100 | 17.06 | |
| STANDBY | 100+0+0 | 22.45 | |
| ENGINEERING | 100+0+0 | 23.47 | |
| OPERATE(*) | 100 + <92 + see above | 24-32 (TBC) | 40.1 (TBC) |