matmos 0.0.0a1

Library of atmospheric models

MATMOS

MATMOS is a direct and inverse atmospheric model library. Currenty MATMOS supports the International Standard Atmosphere model.

MATMOS allows you to calculate the temperature, pressure and density of the atmosphere receiving as input a given height (direct model), or any of the other quantities (indirect).

As temperature is not a monotonic function of height (equal values of temperature happen at different heights), its inverse cannot be determined without more information. To solve this, the option to specify an altitude range where the temperature is to be found is provided.

The API reference is available here.

Install

pip install matmos

Use

MATMOS allows for input in the form of floats and well as NumPy arrays. The unit convention can be seen in the table below.

Magnitude	Altitude	Temperature	Pressure	Density
Unit	km	K	Pa	kg/m^3

Importing a model

from matmos import ISA

Running and retrieving results

The model is run by simply initializing an instance of the model with height, temperature, pressure or density as inputs. The results are stored as instance attributes and can be retrieved with the usual notation.

Direct model

Solving for a given height:

m = ISA(23.5)                       # 23.5 km

m.t                                 # Temperature
m.p                                 # Pressure
m.d                                 # Density

Inverse model

Solving for a given temperature:

m = ISA(t=225, hrange=[0, 20])      # 225 K, in the range from 0 to 20 km

m.h                                 # Altitude
m.t                                 # Temperature
m.d                                 # Density

Solving for a given pressure:

m = ISA(p=98000)                    # 98000 Pa

m.h                                 # Altitude
m.t                                 # Temperature
m.d                                 # Density

Solving for a given density:

m = ISA(p=0.03)         # 0.03 kg/m^3

m.h                     # Altitude
m.t                     # Temperature
m.p                     # Pressure

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