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Date
Attendees
- Unknown User (joaoff)
- Unknown User (julianve)
- Unknown User (rogerbi)
- Unknown User (sivertba)
- Tore Bø
- Jan Tommy Gravdahl
Goals
- Tore Bø - visitor from NUTS (interested in JPEG2000 compression)
- Gantt Chart
- NASA Ames presentation
- RCN report
- HSI design documents & specs (GDrive)
- Follow-ups
- CAD model
- SNR
Discussion items
| Time | Item | Who | Notes |
|---|---|---|---|
| 10 min | HSI Data | Unknown User (joaoff) |
|
| 5 min | Hardware | Unknown User (julianve) |
|
| 10 min | Software | Unknown User (orlandic) & Jan Otto Reberg |
|
| 5 min | Comms. | Unknown User (rogerbi) |
|
| 10 min | Mission Design | Mariusz Eivind Grøtte |
|
| 5 min | Thermal | Unknown User (sivertba) |
|
Action items
- Unknown User (orlandic) and Unknown User (joaoff) updates and add details to the processing chain diagram. Decide what comes first, second etc.
- Unknown User (joaoff) and Unknown User (julianve) updates the Excel-file (parameter design for camera).
- Mariusz Eivind Grøtte and Unknown User (joaoff) will work on deriving/reverse-engineer the camera in order to make CAD-model. Need both for PCB and Thermal.
- Unknown User (julianve) writes up a list for things needed from Fred.
Status on follow-ups for last weeks action items (5 min)
- Not complete (week 40) Mariusz Eivind Grøtte Get preliminary results from EOIR tool in STK (or MODTRAN) on "what can we see from space"
- Not complete (week 40) Unknown User (julianve) First revision of PCB
- Not complete (week 40) Unknown User (rogerbi) A cost benefit analysis of power usage vs compression for comms.
- Not complete (week 40) Unknown User (rogerbi) Present architecture for ground station, how will it work. Decide when upgrade happens, does that involve getting the total package such as h/w and s/w? And need a data system for storing and archiving.
- Not complete (week 40) Unknown User (sivertba) Find a student to do thermal analysis and coordinate with Mariusz
- Not complete (week 40) Unknown User (joaoff) Report of what has been done with HSI imaging
- Not complete (week 40) Give feedback on Gantt chart (ALL) - Still want a list of activities from each - respond to emails
Data from HSI
Discussion on how the processing chain should be. Do geometric processing last? Use JPEG2000 to do the spatial compression.
SNR calculations are going on. Find the correct model for noise is difficult.
Walking through calculations on data from test campaigns (google drive). Calculation of SNR, noise not well modelled but a good start.
Mariusz: try play with functions in Matlab and model noise (start easy->complex models).
Issues with determining dark current and Quantization error, have some spec sheets to find out - may estimate to begin with - oceanoptics website.
Hardware
New documentation for the camera (version 5) is uploaded to the Gdrive. New calculations are made.
We still need to make a better CAD-model. Mariusz Eivind Grøtte is working on this, but needs a lot of input in order to finish this.
Julian is working on layout for the PCB. Finding a source for components (image sensors) are hard; not really available on Digikey and so on.
Challenge: How to mount the optics to the new PCB with the image sensor. What kind of fixtures can be used? There might be changes in the distance between the optics to the sensor, but the light after the optics are parallel, so that should not affect operation. Must be verified. The full design should be verified and approved by Fred before production.
Thermal model
Mariusz, Sivert, Roger had a short meeting with a phd-student from mechanical eng. on thermal/environment tests. Should have a meeting with a professor there.
Julian suggests that we try to reverse-engineer the casing and order parts so we can build several for testing.
Need to test smaller cut-off parts and a prototype encasing from CAD. Need to establish material properties (better required?), Young's modulus, elasticity etc. Measurement of thermal expansion coefficient and dimension distortions (micrometers).
Software
Milica has been working on OTFP pre-processing - 500x500x100 size data cube. Working on parallelisation. Plans for next two weeks are to test on the board in communication with memory, further optimization of hardware implementation and so on.
JPEG - Close to complete the flow from input to bitstream.
IdleTechs
None
Communications
Roger is working on SDR-report/design. Will go to AMES with updated info.
Mission Design
Had a mission requirement review today - under re-iterations. Needs feedback on slides for Ames meeting.
RCN Report
Work on-going. Requirements are listed.
Actions ahead
- Respond to the Gantt chart request!
- See to the left on items