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README.txt
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README.txt
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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