adisalib

Download and install

Download the latest version as gzipped tarball and (for Linux) untar and install as root:

tar -xvzf adisalib-latest.tar.gz
cd adisalib<-x.y.z-yyyy-mm-dd>
sudo python setup.py install

Now the module can be used in python scripts by

import adisalib

The module has never been tested with Windows, but it should work.

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ICAO Standard Atmosphere (ISA) - functions and routines

© Dietmar Thaler 2014-2016

E-Mail: info@foehnwall.at

Web : http://www.foehnwall.at/pythonmodules.html

Warning

adisalib calculates ISA only up to 32000 gpm!

Note

This module makes use of the numpy library. NumPy is the fundamental package for scientific computing with Python. Make sure you have it installed. See http://www.numpy.org/ and http://sourceforge.net/projects/numpy/

Both Python 2.7 and Python >= 3.4 compatibility assured.

The core routines of the library are:

• isa_pressure(height)
• isa_density(height)
• isa_temperature(height)
• isa_height(pressure)
• isa_QNH(barometer_altitude, pressure)
• isa_QFE(barometer_altitude, arp_altitude, pressure)
• isa_densityaltitude(density)
• isa_table(h1,h2,dh)

Added are a couple of constants, variables and conversion routines (see below). A simple demo program that produces a matplotlib-graphic can be found at www.foehnwall.at/isa.html.

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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License. If not, see <http://www.gnu.org/licenses/gpl.html> .

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adisalib.c2k(tk)

Converts temperature in Celsius to temperature in Kelvin

adisalib.celsius2kelvin(tc)

Converts temperature in Celsius to temperature in Kelvin

adisalib.f2m(foot)

Converts foot to meter

adisalib.foot2meter(foot)

Converts foot to meter

adisalib.isa_QFE(barometer_altitude, arp_altitude, pressure)

Returns QFE (pressure at aerodrome reference point arp) as function of:

barometer_altitude in gpm

arp_altitude in gpm

pressure … pressure reading at baromter_altitude in hPa

adisalib.isa_QNH(barometer_altitude, pressure)

Returns QNH in hPa below 3200 gpm aas numpy array

barometer_altitude in gpm

pressure … barometer reading in hPa at barometer altitude as numpy array

adisalib.isa_density(hh)

Density in ISA below 32000 gpm

hh … altitude in gpm

isa_density … density kg/m**3 at level hh

adisalib.isa_densityaltitude(density)

ISA-density altitude for a given air density

rho … actual air density

isa_densityaltitude … altitude where ISA-density equals rho (in gpam)

adisalib.isa_height(pressure)

Height in ISA below 32000 gpm as function of pressure

pp … pressure in hPa

isa_height .. height in gpm

adisalib.isa_pressure(height)

Pressure in ISA below 32000 gpm as function of height

hh … altiude in gpm

isa_pressure .. pressure at level hh in hPa

adisalib.isa_table(h1=0, h2=32000, dh=500, csv=False)

Prints a table with ISA-Data.

h1 and h2 … lower and upper vertical boundary in Meter

dh … vertical increment in Meter

csv … flag (locical)

True … the output is a CSV-formatted file with a semicolon ‘;’

as field separator and a dot ‘.’ as decimal separator.

False … Textfile

adisalib.isa_temperature(hh)

Temperature of ISA-Standardatmosphere as function of altitude

z … altitude in gpm

isa_temperature … ISA temperature in K

adisalib.k2c(tk)

Converts temperature in Kelvin to temperature in Ceslius

adisalib.kelvin2celsius(tk)

Converts temperature in Kelvin to temperature in Ceslius

adisalib.m2f(meter)

Converts meter to foot

adisalib.meter2foot(meter)

Converts meter to foot