AmbaSat is a DIY “SpriteSat”, essentially a 3.5 mm circuit board with a solar cell on its back side. AmbaSat plans to launch 200 SpriteSats at a time in Extreme Low Earth Orbit (ELEO), where they will transmit for 3 months before burning up in the atmosphere. These Arduino based systems use LoRa (a low power, long range radio protocol) and utilize the existing 5000+ LoRa gateways to the Things Network (www.ThingsNetwork.com).
I purchased one of these units and have been documenting my experiences. This page contains links to the relevant pages.
Lab Notes: LoRa Activities and Experiments
General notes regarding all my LoRa Activities including AmbaSat testing
Creating a TTN Application for AmbaSat
How to create a Things Network account, setup a gateway and application to receive data from the AmbaSat.
Connecting your TTN App to Short Term Storage
The Things Network provide 7 day storage for your data. This is useful for testing and debugging until you develop a long term solution. Note: you can skip over this if you built a Tago.io dashboard. Tago.io will store data for 30 days and provides for easy downloads.
Creating an AmbaSat Dashboard with Tagi.io
Once created, it is very easy to add displays, gauges and graphs for other AmbaSat parameters such as power levels, reboot counts, packet counts, accelerometer, etc.
Mapping Range of LoraWAN and AmbaSat
My early attempts to map the range of the AmbaSat. Best as a disappointing 1.8km. I need to get a better antenna for my receive gateway.
Simulating AmbaSat in Space Under Solar Power
I wondered how the system and software would perform in space should the AmbaSat be tumbling in and out of sunlight. Would the microprocessor be constantly rebooting? So I devised an experiment to simulate the condition.