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README for BalloonGUI3 GUI is built for a 1920x1080 screen, if your resolution is different, this may require edits to the postion definition in hs.fig The program generates a GUI for balloon perfomance calculations. The program requires additional functions that are called. The dependency is as follows: AWOSMethod MoistDensity StandardAtmo1976 CustomStandardAtmo1976 MoistDensity LocalMethod MoistDensity StandardAtmo1976 CustomStandardAtmo1976 MoistDensity HeliumMassCalc BalloonGUI3 is programmatically implemented, and is recommended for use. Besides the functions it calls, only it is needed. There are older versions that are not recommended for use. Tank Mass Calculator uses HeliumMassCalc for mass of helium. In the field, it appears that the calculation is more than what is measured by a physical scale, so it should only be used as a check. AWOS Data is from an airport's Automated Weather Observing Station, usually the one closest to the launch site broadcast from the station can be heard by calling the phone number of the station usually listed online. Units are: Temperature: Celcius Dew Point: Celcius Pressure: inches of Mercery Airports and their Phones and Freqs Hagerstown Airport HGR ASOS: 126.375 (301-745-3497) College Park Airport CGS AWOS: 121.225 (301-864-5497) Montgomery Country Airpark GAI AWOS: 128.275 (301-977-2971) Tipton Airport FME AWOS: 123.925 Baltimore Washington Thurgood Marshall Airport BWI ASOS: 410-691-1278 Greater Cumberland Regional Airport CBE Unicom: 122.8 AWOS: 128.625 (304-738-0451) Bedford County Airport KHMZ Unicom: 122.7 AWOS: 123.675 (814-623-2936) Five Lakes Airport AWOS: 301-745-3497 Local Data is measurements taken on-site with on-site equipment. The pressure reading must be absolute/station pressure, not adjusted to be sea level pressure. Weather apps do usually give sea level pressure, so do not use those. Commonly, a cell phone with barometer should be used. I use a cell phone and its app to get pressure, temperature, and dewpoint. Units are: Temperature: Fahrenheit Dew Point: Fahrenheit Pressure: milibars (hectapascals) Note: units can be easily changed for the functions if the need for standardized units becomes nessisary Launch Altitude is in Meters Balloon Temperature is in Fahrenheit Helium Mass and Payload Mass are in kilograms Payload Mass needs to include the mass of the balloon, parachute, command module, and all payloads. DuctTapeFactor is dimentionless All wieghts and lifts in the output is given in pounds. Payload Weight is given in pounds. The Burst Diameter is dependent on the kind of balloon. 1600g seem to burst at 10.5, but can exceed performance and be just short of 11m 2000g are predicted to burst between 10.5m to 11.25m 3000g are predicted to burst at 12m, but actually seem to burst at 11.5m
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MATLAB code pertaining to balloon performance calculations
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