Rho

A small library which helps estimate air density (rho) based on air temperature, pressure, dew point and altitude.

Installation

`npm install @mariuspopovici/rho`

Usage

Parameters

• temperature Air temperature in degrees Celcius (°C) or Fahrenheit (°F) depending on unit type.
• air pressure Air pressure in hPA or inHg depending on units type
• dew point Air temperature in degrees Celcius (°C) or Fahrenheit (°F) depending on
• units of measurement Optional, defaults to metric. Change to imperial to indicate that inputs are in imperial units of measurement.
• altitude Optional, defaults to 0. Specify altitude if pressure is measured at sea level.

Examples

    var rho = require('@mariuspopovici/rho');
    // calculate Rho with values expressed in imperial units
    var density = rho(68.9, 30.1, 68.9, 'imperial');

Output should be 1.1984

    var rho = require('@mariuspopovici/rho');
    // calculate Rho adjusted for altitude
    var density = rho(29, 1010, 20, 'metric', 2000);

Output should be 0.9402

    var rho = require('@mariuspopovici/rho');
    // calculate Rho with values expressed in metric units (default)
    var density = rho(20.5, 1019.3, 20.5);

Output should be 1.1984

Result is reported in kg/m³ and can be optionally converted to lb/ft³.

    var rho = require('@mariuspopovici/rho');
    // calculate Rho with values expressed in imperial units
    var density = rho(68.9, 30.1, 68.9, 'imperial').toPoundsPerCubicFeet();

Tests

`npm test`

Contributing

In lieu of a formal style guide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code.