Closed MedadRufus closed 3 years ago
First data on ICSPACE21 on day 2
I confirm that the balloon is waking up at 11.05 degrees sun elevation. Below is the calculation for when the sun was rising on day 2 of ICSPACE21. Info at 8848m altitude, at 04:53 UTC on 5 September 2020 at position 49.9455,28.2977
The Sun elevation was at 15.57 degrees elevation at the end of that day. Info at 8848m altitude, at 15:02 UTC on 5 September 2020 at position 45.5146,28.2977
Data taken from: https://www.suncalc.org/#/45.5146,28.2977,4/2020.09.05/07:53/8848/3
We can optimise this by putting the mcu in low power mode, while GPS searches for first fix of day, to save a few mA. Around 6mA.
closed in favour of #32
It is estimated that the tracker transmits for the first time at only 23 degrees sun elevation. However, as the sun goes down, it is able to tx all the way to 12 degrees.
Its important to maximise the time it transmits