|Allocated TM||20.5 kbits/s|
|Download capacity per orbit||6.642 GB||= 53.136Gbits|
SoloHI consists of 1 white-light telescope with wide FOV. The image is captured on a mosaic of four 2048x1920 APS detectors that are read out independently. This gives flexibility for image operations: independent exposures, cadences, etc.). Data can be read out either from the whole detector or from selected subfields.
Typically, SoloHI images will have one of 3 typical FOVs defined below. These are used in the observing programs/modes currently defined but could be changed in-flight if necessary.
|detector size (radial x transverse)||FOV (radial x transverse)||TM/raw image||compression rates|
|SoloHI Full frame image|
3968 px * 3968 px
5º-45º x 5º-45º (40ºx40º)
lossless (factor 2.5) - lossy (up to 50)
|SoloHI inner FOV subframe image|
192 px * 512 px
5.8º-7.68º x 5º (1.88ºx5º)
13.5º-15.38º x 5º
18.5º-20.38º x 5º
|Radial Swath subframe image|
3968 px * 512 px
|5º-45º x 5º (40ºx5º)|
source: SoloHI UM - SSD-DOC-SOLOHI-013 Rev. B draft 5
The SoloHI baseline observing program will be defined to repeat for each occurrence of the same unique orbit (i.e. each orbit of the trajectory within the same resonance with Venus). Therefore, a SoloHI baseline observing program will be defined for each orbit phase in NMP/EMP and will be executed for all orbits within that resonance.
Example of such an orbit plan is below:
The details of each observing mode are still to be provided by SoloHI.
|Observing modes - Example plan||Use case||#images / day||Science data volume / day||SoloHI data rate||Observing duration / orbit|
|(Gbits) estimate||(kbits/s)||(days) example|
|Perihelion programs:||0.28-0.29 AU|
|Near-Perihelion programs:||0.29-0.36 AU|
|SoloHI Near-perihelion Synoptic Program||348||1.69||20.3||5|
|SoloHI Solar Wind Turbulence Near-perihelion||750||1.94||23.2||2|
|SoloHI Shock Formation Near-perihelion||516||2.45||29.3||2|
|SoloHI Far-Perihelion Synoptic Program||132||1.64||19.7||7|
|Southern Out-of-ecliptic programs:||0.5-0.7 AU|
|SoloHI Southern Synoptic Program||104||0.84||10.3||8|
Dependent on the trajectory
Examples of more-detailed observing program for 1 type of orbit during the mission:
SoloHI concept study report Dec 2011, needs update!