- Created by Unknown User (santora), last modified on 25.09.2017
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Date
Attendees
Goals
- Decide on hardware architecture (components to buy)
- Present data from UAV Porto Experiment
- Suggest PM actions
Discussion items
| Time | Item | Who | Notes |
|---|---|---|---|
Action items
- Mariusz Eivind Grøtte Investigate references for HSI atmospheric correction (lit review)
- Unknown User (joaoff) Get some analysis of HSI data in open ocean
- Unknown User (julianve) Get CAD model for camera interior (lenses etc.), must be something we can model with?
- Unknown User (orlandic) Software architecture and onboard processing pipeline
- Unknown User (rogerbi) Ask Tor-Arne for computers and Terje/Nina for access to the lab
- Unknown User (julianve) / Mariusz Eivind Grøtte Ask Fred how easy it is to change the optics and SNR designed for
- Mariusz Eivind Grøtte Redefine what is 100 GSD in our documents and for mission reqs.
- Unknown User (sivertba) Ask someone who might be interested in thermal modeling
- Mariusz Eivind Grøtte Create Gantt Chart
Status
Mission design update
- Working on timeline, need input from everyone
- Gantt charts and milestones etc.
- Looking at the slewing motion and trying to model the target area. - Optimal slewing rate calculation.
Data from HSI
- Viable results from 400-700 nm range
- 3000 lumen ref. to what (from a Master's thesis) for signal measurement. FFI tools may support to infer noise --> SNR
- Previous calculations on light intensity in space http://nuts.cubesat.no/upload/2015/03/06/prototype_design_for_cubesat_by_thomas_hanssen_nornes.pdf
- SNR discussion, multiple sources of noise: water to camera, thermal noise, electronic noise, conversion noise. Not just light intensity.
- Seeing the ocean is not the problem, if it is dark it’s dark (no data). If we are looking at something we want to see, like algal blooms, there’s a lot there that will reflect the signal.
- Drone data in Joao’s report was from shallow water.
Hardware
- There’s a graphic that explains the latest prototype.
- Julian will start the pcb layout this week.
- The sensor is a NIR enhanced (more sensitive over 700nm) version of the one that is flying on the drones right now.
- Got CAD files from Fred but only of the house, not lenses.
Software
- Working on getting data from memory to any type of processing system.
- Agreed that the first data from the sensor can be 12-bit data packed in 16-bit buffers. If needed we can repack it as 12-bit data for communication.
- will need updated code from Idletech with a more realistic data cube.
- writing code for different matrix implementation.
- working on basic jpeg compression.
Communications
- No update until we have met with all the platform providers, possibly in October or November.
- Roger will be gone for 3 weeks.
Process
- Next week, Tuesday from noon to 1pm Julian, Milica and Joao will meet with Idletechs.
- Follow up question: Is it possible to have computers in the lab soon? Ask Tor-Arne for computers and Terje/Nina for access to the lab.
Actions ahead
- Need to find anyone who is interested in looking into Thermal expansion simulation.
- Need CAD model to do simulations on thermal impact. Information from Fred on how much displacement of the lens can be tolerated. Then compare with simulations of different materials.
- Sivert might have someone interested in doing that.
- 100m ground sampling distance and ground sampling resolution is both being used in the specification. Need to decide which one that is going to be used for presentations.
- We might do 50m ground sampling distance. Better processing means lower ground sampling distance and higher resolution.
- If ground sampling distance 100m is the case, that’s achievable and a conservative estimate.
- Ask Fred how easy it is to change the optics. Maybe include Fred on one of the weekly engineering meetings.
- Is atmospheric correction is necessary?
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