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Added Altitude Pressure equation (#8909)

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* Added Altitude Pressure equation

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* Update physics/altitude_pressure.py

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* Added positive and negative pressure test cases

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This commit is contained in:
Bazif Rasool
2023-07-30 20:30:58 +05:30
committed by GitHub
parent d31750adec
commit 8b831cb600
2 changed files with 52 additions and 113 deletions
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"""
Title : Calculate altitude using Pressure
Description :
The below algorithm approximates the altitude using Barometric formula
"""
def get_altitude_at_pressure(pressure: float) -> float:
"""
This method calculates the altitude from Pressure wrt to
Sea level pressure as reference .Pressure is in Pascals
https://en.wikipedia.org/wiki/Pressure_altitude
https://community.bosch-sensortec.com/t5/Question-and-answers/How-to-calculate-the-altitude-from-the-pressure-sensor-data/qaq-p/5702
H = 44330 * [1 - (P/p0)^(1/5.255) ]
Where :
H = altitude (m)
P = measured pressure
p0 = reference pressure at sea level 101325 Pa
Examples:
>>> get_altitude_at_pressure(pressure=100_000)
105.47836610778828
>>> get_altitude_at_pressure(pressure=101_325)
0.0
>>> get_altitude_at_pressure(pressure=80_000)
1855.873388064995
>>> get_altitude_at_pressure(pressure=201_325)
Traceback (most recent call last):
...
ValueError: Value Higher than Pressure at Sea Level !
>>> get_altitude_at_pressure(pressure=-80_000)
Traceback (most recent call last):
...
ValueError: Atmospheric Pressure can not be negative !
"""
if pressure > 101325:
raise ValueError("Value Higher than Pressure at Sea Level !")
if pressure < 0:
raise ValueError("Atmospheric Pressure can not be negative !")
return 44_330 * (1 - (pressure / 101_325) ** (1 / 5.5255))
if __name__ == "__main__":
import doctest
doctest.testmod()