ArduSat-PL - ogólne rozmowy

[Adam.Przybyla]

Dla jednego bloku danych? Mysle, ze bez problemu. Moze trzeba bedzie laczyc kilka komunikatow  razem, jesli bedzie ograniczenie na ilosc lacznosci. Z powazaniem
                                                                                          Adam Przybyla

Właśnie się tak zastanawiam - chyba nie wiemy, które sensory są podpięte do których arduino - czy wiemy?
Jeśli nie, to możemy zrobić tak, że wszystkie ardu będą zbierać dane przez xxx minut przynajmniej i zapisywały czas rzeczywisty. To wtedy będzie kilka bloków danych, które sobie możemy połączyć na Ziemi.

            ... jak rozumiem, arbitrazem zajmoje sie jednostka nadrzedna. Z powqazaniem
                                                                                                                         Adam Przybyla

[kanarkusmaximus]

Też spytać się o potwierdzenie tego?

[Adam.Przybyla]

Też spytać się o potwierdzenie tego?

           ... tak, o ile moglbys poswiecic na to troche czasu. Z powazaniem
                                                                                               Adam Przybyla

[kanarkusmaximus]

Też spytać się o potwierdzenie tego?

           ... tak, o ile moglbys poswiecic na to troche czasu. Z powazaniem
                                                                                               Adam Przybyla

Chcę na to poświęcić nieco czasu i przesłać do ArduSata dłuższy email z serią pytań - o to mi chodziło tutaj. Zgaduję, że Tobie o coś innego?

[Adam.Przybyla]

Też spytać się o potwierdzenie tego?

           ... tak, o ile moglbys poswiecic na to troche czasu. Z powazaniem
                                                                                               Adam Przybyla

Chcę na to poświęcić nieco czasu i przesłać do ArduSata dłuższy email z serią pytań - o to mi chodziło tutaj. Zgaduję, że Tobie o coś innego?

            ... nie, o to samo. Dzis postaram sie sciagnac ostatnia wersje softu. Zobaczymy co mozna na teraz ustalic. Z powazaniem
                                                                                                                                                                            Adam Przybyla

[kanarkusmaximus]

Dzięki za wyjaśnienia.   Adamie, czy czas abyś założył wątek o loggerze danych?

[Adam.Przybyla]

Dzięki za wyjaśnienia.   Adamie, czy czas abyś założył wątek o loggerze danych?

            ... moze sprobojmy opisac tu swoimi slowami co dokladnie mialby robic nasz program, co pobierac i co wysylac i na co zwracac uwage,
mysle, ze mimochodem wyjdzie nam watek o ... logerze;-) Z powazaniem
                                                                                                        Adam Przybyla

[kanarkusmaximus]

Zgadzam się, poknuję zatem i dam odpowiedź w przeciągu kilkunastu godzin.

[kanarkusmaximus]

Email do ekipy ArduSata posłany. Adamie, masz kopię na swoim mailu. Zapytałem chyba o wszystko, co było tutaj przedmiotem dyskusji w ostatnich tygodniach.

[Adam.Przybyla]

Email do ekipy ArduSata posłany. Adamie, masz kopię na swoim mailu. Zapytałem chyba o wszystko, co było tutaj przedmiotem dyskusji w ostatnich tygodniach.

              ... powracam z backup'ow;-) dzieki za CC:) Z powazaniem
                                                                             Adam Przybyla

[kanarkusmaximus]

Aha ! Jest odpowiedź! Wiele rzeczy nam wyjaśnia! Na grubo odpowiedzi z Nanosatisfi. Mój komentarz po głębszej analizie tekstu.

1. Schematics of ArduSat:
- we don't know which arduino is connected to which sensor. Could you provide the current schematic of ArduSats?
- we found this schematic: https://docs.google.com/file/d/0B4QvoZKcYdIDeUQzb25JNVlTVE0/edit?pli=1
which is for sure outdated
- we do not know how many SD cards are onboard each ArduSat and which arduino is connected to it.
When it comes to datalogging, you don't need to know how the sensors or SD card are connected. We're providing some basic libraries to handle that in the SDK.
https://github.com/ArduSat/ArduSatSDK
http://api.ardus.at/annotated.html
Here's how you save experiment data:


2. Examples and libraries
- Are there any examples related to orientation, camera and GPS available? The camera might need all three of them to do one good shot.
- It is very difficult to prepare a code without such examples. Could I request at least one or two basic tutorials in this topic?
- Communication system - we would like to perform a simple "beep beep" experiment. However, again there are no examples. What we are right now thinking is to create something similar to this code: http://ukhas.org.uk/guides:linkingarduinotontx2 , of course with RTC line in it, if possible.
Taking a photo is certainly the most popular experiment, though due to some bandwidth restrictions, we will be publishing a limit to the number of photos per experiment. We will publish with plenty of notice, though did want to make you aware of that now. Also, orientation of the camera will need to come through us for ArduSat-1 and ArduSat-X (ie require some intervention on our end), though we hope to have something working through the library functions for ArduSat-2. More to come on that in the near future as well.
"Beep Beep" is not an experiment that the satellite is capable of at this time, though could be considered for future missions.

3. Onboard instruments
- Have you done tests of ArduSat instruments in simulated orbital conditions? For example I have trouble in guessing what will be the luminosity of Earth and Sun for the photodiodes/resistors - I even think that they will be very quickly saturated.
The same question goes to the GPS, which would rather give different results than on the Earth (a common problem for LEO navigation). We also don't know which sensitivities of instruments were chosen, if they are not selectable.
Orientation and GPS will not addressable from the arduino nodes. We're working to try and get GPS data available after-the-fact so you can sync it with your other data. As for orientation, you'll have to let us know before the experiment how you'd like the satellite oriented.

Finally, have you installed a watchdog onboard or are you using this trick:
http://tushev.org/electronics/arduino/item/46-arduino-and-watchdog-timer
We are doing some watchdog behavior.

Do you have any results from ground tests, which you could publish?
Here is sample data, though we do not have published ground test data from the engineering satellite at this time. More to come on this.

4. Timeline:
- I guess that work on our code will take us at least next few months. There is a risk that we won't be ready before planned end of ArduSats mission, i.e. March 2014. Can you confirm our time would be in this situation transferred to a next satellite?
- How should we send the code and receive comments from Nanosatisfi? Is it through email or one of websites? (See below)
When it comes time to submit the code, you will use https://ardusat.org/ui/development . There will be a button to submit your code for review.
Yes, if your code doesn't get on the first launch, we will move your time to the next one.

5. websites and resources
There are several web resources, which are related to ArduSat, but some of them seem not to be active. Could you help us in this topic?
Ardusat.org will be your primary resource, and will be undergoing an overhaul of sorts in the coming weeks, which should also net further details and information.

Which ones of these should we follow?
When it comes time to submit the code, you will use https://ardusat.org/ui/development . There will be a button to submit your code for review.

- is there any website with current news related to ArduSats?
For "news", it's best to follow our Twitter and Facebook:
https://twitter.com/nanosatisfi
https://www.facebook.com/pages/NanoSatisfi/307866409295499

- is there any message board or forum related to ArduSats?
We have added a message board to ardusat.org - just click the Community link at the top.

[kanarkusmaximus]

I jeszcze jedna odpowiedź. Znów na grubo uzyskana odpowiedź.

trying to do our best to perform three experiments during our mission time:

- Datalogging from sensors
- Few pictures from the orbit
- "Beep beep" transmission, which would be heard by radio amateurs

However, there is a lack of information, examples and there are many websites with some scarce data about ArduSat, so we are right now very confused. That is also why I am sending you this email and ask for some answers.

A beep-beep transmission will not be possible with the first version of ArduSat. Unfortunately, we can't use the radio from the arduinos on board. However, we will be publishing the orbit information and you should be able to hear the satellite with any ham radio equipment when it passes over. There are a number of satellite tracking tools online that you use already (since satellite orbit info is public).

Here's some example code for taking a picture. We're limiting each experiment to one picture due to the bandwidth restrictions on the satellite.
https://github.com/bordicon/ArduSatSDK/commit/af6b32bc86897bf019dbcd99746c143aaba9c489

1. Schematics of ArduSat:
- we don't know which arduino is connected to which sensor. Could you provide the current schematic of ArduSats?
- we found this schematic: https://docs.google.com/file/d/0B4QvoZKcYdIDeUQzb25JNVlTVE0/edit?pli=1
which is for sure outdated
- we do not know how many SD cards are onboard each ArduSat and which arduino is connected to it.

We cannot publish any schematics of the satellite due to export regulations. We'd love to do it but the law says we can't.

Here's a video about saving experiment data:
#Link do YouTube niepoprawny#
And the example code:
http://pastebin.com/UB0EbQYG

Here's a list of sensor addresses:
https://github.com/ArduSat/ArduSatSDK/blob/master/I2C_add/I2C_add.h

2. Examples and libraries
- Are there any examples related to orientation, camera and GPS available? The camera might need all three of them to do one good shot.
- It is very difficult to prepare a code without such examples. Could I request at least one or two basic tutorials in this topic?
- Communication system - we would like to perform a simple "beep beep" experiment. However, again there are no examples. What we are right now thinking is to create something similar to this code: http://ukhas.org.uk/guides:linkingarduinotontx2 , of course with RTC line in it, if possible.

We cannot control the orientation from the onboard arduinos. For orienting the satellite, we'll be providing a workflow where we will turn the satellite manually for specific experiments. GPS data will be available after the experiment to sync with experiment data.

3. Onboard instruments
- Have you done tests of ArduSat instruments in simulated orbital conditions? For example I have trouble in guessing what will be the luminosity of Earth and Sun for the photodiodes/resistors - I even think that they will be very quickly saturated.
The same question goes to the GPS, which would rather give different results than on the Earth (a common problem for LEO navigation). We also don't know which sensitivities of instruments were chosen, if they are not selectable.

We have done some testing but obviously there are many conditions that aren't testable. For the luminosity sensor, you'll have to write code that understands the conditions of space (like the saturation you mentioned).

I believe GPS we have will be the ground position but I'll have to ask an engineer about that.

Finally, have you installed a watchdog onboard or are you using this trick:
http://tushev.org/electronics/arduino/item/46-arduino-and-watchdog-timer

We are doing some watchdog behavior. I'm not privy to the exact details however.

Do you have any results from ground tests, which you could publish?

Not at this time. We're still working on getting a simulated environment ready for on-ground user experiment testing.

4. Timeline:
- I guess that work on our code will take us at least next few months. There is a risk that we won't be ready before planned end of ArduSats mission, i.e. March 2014. Can you confirm our time would be in this situation transferred to a next satellite?
- How should we send the code and receive comments from Nanosatisfi? Is it through email or one of websites? (See below)

Your time will be rolled onto the next satellite.

5. websites and resources
There are several web resources, which are related to ArduSat, but some of them seem not to be active. Could you help us in this topic?

Which ones of these should we follow?
- http://www.youtube.com/user/nanosatisfi?feature=watch (youtube channel, few simple examples, a lot that is missing)
- http://codebender.nanosatisfi.com/ (I cannot log in into there! I started working on that site, but now I can't log in. Could you help me? My user's name is this email address) --> Is this a page where I should send the code?

- https://ardusat.org/ui/development (again, lack of examples related to ArduSats)
- https://github.com/ArduSat  (seems to be inactive, i.e. very low activity)

Also:
- is there any website with current news related to ArduSats?
- is there any message board or forum related to ArduSats?

We have rolled codebender.nanosatisfi.com into http://ardusat.org - (the development area).
https://github.com/ArduSat/ArduSatSDK contains some example code (pretty much every sensor).
We have added a message board to ardusat.org - just click the Community link at the top.
For "news", it's best to follow our Twitter and Facebook:
https://twitter.com/nanosatisfi
https://www.facebook.com/pages/NanoSatisfi/307866409295499

[kanarkusmaximus]

No to tak sobie czytam i:
- wydaje mi się, że przesyłany kod do ArduSatowców ma być znacznie prostszy niż się nam wydawało. "Oni" zajmą się kwestią orientacji satelity.
- eksperyment z nadaniem sygnału bip bip bip nie jest możliwy - czy redukujemy liczbę eksperymentów do dwóch czy coś dodajemy?
- dane z GPSa będą dodane już po eksperymentach dla możliwości powiązania danych z miejscem na orbicie
- nie mogą przedstawić schematów ArduSatów.
- znamy już strony, które mamy śledzić - wydzielę je do oddzielnego wątku niebawem

Suma sumarum, po prostu musimy przedstawić pierwsze wersje kodu i działać. Z pewnością logger danych z sensorów można "dość szybko" zrobić. Co do fotek (napiszę to w oddzielnym wątku) - trzeba będzie po prostu ustalić miejsca wykonania zdjęć oraz spodziewaną orientację satelity i wsio.

Ogólnie dość pozytywne wieści. Czy reszta zespołu się ze mną zgadza?

[jmvh]

- eksperyment z nadaniem sygnału bip bip bip nie jest możliwy - czy redukujemy liczbę eksperymentów do dwóch czy coś dodajemy?

A mamy w ogóle jeszcze jakiś pomysł?

Co do fotek (napiszę to w oddzielnym wątku) - trzeba będzie po prostu ustalić miejsca wykonania zdjęć oraz spodziewaną orientację satelity i wsio.

Wreszcie jakiś konkret!

However, we will be publishing the orbit information and you should be able to hear the satellite with any ham radio equipment when it passes over.

Ciekawi mnie czy mają dokładniejsze dane na temat orbity niż dostępne publicznie TLE. Operatorzy satelitów są traktowani jednak inaczej.

[kanarkusmaximus]

Wydaje mi sie, że możemy całość zredukować tylko do dwóch projektów i się postarać je dobrze zrealizować.

Adamie - jak Twoje prace?