This is a short document regarding the meeting tih Andreas Echtermeyer, that took place between 11.00-12.00 on the 20th of October 2017
As Dr. Echtermeyer pointed out, the current lab equipments is not setup to generate the desired temperature gradients that we want to test for, but as he also pointed out, there is no test scenario where you don’t have to customize your setup for the current experiment. Similar setups have been built for systems like the James Webb telescope, and he believed it to be very feasible
Our biggest concern as of now is that we need to be able to say something about what kind of distortions we can accept in the camera, and for what part of the lens and what not that this regards.
We also need to have an idea about what kind of material we want to use, and how it should be produced.
Sivert:
Without much knowledge about the sensitivities of the camera I would suggest that we perhaps could acquire more (than one) camera of the same type as the one we want to send to space for testing purposes (Far from the first person to suggest this …), and have some duplicates that we are not too anxious about. Furthermore we could try to see if the camera responds in an appropriate manner under distress using different sources for relevant (correct nm) monochromatic light. This should be done both during different testing scenarios as well as in an effort to better familiarise with the limitations of the camera with regard to both saturation and minimal amount of photons. If at all possible of course.
2 Comments
Unknown User (livermor)
Question Unknown User (sivertba): where have we discussed performing the thermal testing? Is this lab equipment here? From my experience - if we can do some (even though it doesn't have all the gradients we want to test for) testing - it will help us alot. Then we could talk with other places in Norway that do thermal testing and see if any of them meet our requirements. (I also don't know yet where the requirements come from). We used to do basic thermal testing in an electronics lab (where you could blast it with heat/cold, but not keep it stable - learning if there were any critical things with setup or design), then at FFI (simple setup with more control), then at the actual thermal chambers (vacuum and the whole test world) - just so we wouldn't waste time failing at our first test at the actual thermal chambers which might not be nearby or be very expensive.
Maybe we can have a chat about this so I can learn what has been decided so far? My system engineering head is curious to learn all that has been decided - and since we don't have a system engineering plan yet (or I haven't been able to find it), I don't really know the test and verification scheme.
Unknown User (sivertba)
Hi!
I guess this is some sort of a loose end as of now ...
There are some facilities at NTNU Trondheim that possibly can be used for thermal testing.
I have not been in contact with other facilities regarding thermal testing.
All that has been documented on this subject lies under the following path on our drive folder:
NTNU SmallSats -> Project Documentation -> Thermal Testing Requirements
It lost traction due to the fact that no one has been able to answer what kind of distortions we can allow in the lens housing and other parts of the system to experience.
We also need to have some sort of idea of what kind of material we want to use.
Dr. Echtmeyer seems both eager and positive to help us once we have established these things.
To summarize:
We need more cameras, and we need to know more about the camera model to be able to proceed, the way I see it.