Home - Space-force/skyhigh GitHub Wiki

Welcome to the skyhigh wiki!

Env:

• 30km,
• -50 deg C
• and less then 1% atmospheres.

Tech

• GPS
• Cellphone Module
• Camera
• Lora antenna: 915 Mhz is used in the US. 868 Mhz is UK/Europe.
• "The voltage supplied by batteries is temperature dependent and for most batteries when the temperature drops below 0 deg C they struggle to supply the necessary voltage. Lithium batteries however are far more resilient and nearly all flights use the unrechargeable Lithium Energizers which are easy to get hold of. Another possibility are Lithium Polymer cells, these are rechargeable and can supply a large current however they haven't been rigorously flight tested and there are concerns about maintenance of their structural integrity - unfortunately Lithium cells when damaged can become unstable and explode!"

Tests

• Parachute Tests
• Battery Runtime Tests
• Cold Sensitivity Tests

Further Reading:

• GSBC, What is a High Altitude Balloon http://community.balloonchallenge.org/t/what-is-a-high-altitude-balloon-hab/678
• UKHAS, A Beginners Guide to High Altitude Ballooning https://ukhas.org.uk/general:beginners_guide_to_high_altitude_ballooning
• DIY Space Exploration, Introduction to High Altitude Balloons https://web.archive.org/web/20130901013526/http://www.diyspaceexploration.com/introduction-to-high-altitude-balloons/
• https://www.raspberrypi.org/blog/pytrack-skygate-hab-software/ - Talks about using different radios and how to integrate easier.

Notes: Redundancy Keep electronics warm Lookup Regulations: Automatic cutdowns and other stuff. Don't touch the balloon, use gloves, oils will affect it. Hydrogen is dangerous but easier to use. Helium harder to get at quantity.