ImperialSpaceSociety / picotracker-Lora

This is the code base and hardware design files for the Lora pico tracker to be flown around the world

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There are unexpected brownouts in ICSPACE23 #66

Closed MedadRufus closed 3 years ago

MedadRufus commented 3 years ago

Figure_1

This causes gaps between transmissions of several minutes. This is for ICSPACE23.

Launched 17 December 2020

MedadRufus commented 3 years ago

Figure_1

This is for ICSPACE21. Its almost perfect

Recorded on 4 September 2020

MedadRufus commented 3 years ago

Figure_1 The Plot for ICSPACE22 on day 1 over EU. There is a lot more gaps in data. The only change from previous flight(ICSPACE21) in the code was to limit channels over US915, unrelated to anything over EU.

Recorded on 19 October 2020

MedadRufus commented 3 years ago

Figure_1

Plot for ICSPACE20. No gaps at all! Recorded on 22 August 2020

MedadRufus commented 3 years ago

Figure_1 Plot for ICSPACE24. Lots of gaps between transmission. No clear clumping. But this was with smaller solar cells(19mm x 39mm vs 19mm x 52mm for previous flights). Recorded on 22 Jan 2021.

MedadRufus commented 3 years ago

Its likely a power issue

MedadRufus commented 3 years ago

Nothing can be done about it, except to reduce peak current consumption and having more sunlight.

MedadRufus commented 3 years ago

32 could improve things

MedadRufus commented 3 years ago

ICSPACE23 and 24 had tilted solar cells, which contributes to the brownouts on each rotation. Earlier flights were held level