WASM-NRLMSISE-00

This is the WASM port of this NRLMSISE-00 code.

Installation

npm install nrlmsise-00

Usage

    const module = await nrlmsiseModule();
    const NrlmsiseModel = module.NrlmsiseModel;

    // Create an instance of the NrlmsiseModel class
    const model = new NrlmsiseModel();

    // Prepare input values
    const doy = 172;  // Day of year
    const sec = 29000;  // Seconds in the day
    const alt = 400;  // Altitude in km
    const g_lat = 60;  // Geodetic latitude
    const g_long = -70;  // Geodetic longitude
    const lst = 16;  // Local solar time
    const f107A = 150;  // 81-day average of F10.7 flux
    const f107 = 150;  // Daily F10.7 flux
    const ap = 4;  // Magnetic index

    // Run the model
    model.run_model(doy, sec, alt, g_lat, g_long, lst, f107A, f107, ap);

    // Log the results (access the properties directly)
    console.log("HE:", model.HE);
    console.log("O:", model.O);
    console.log("N2:", model.N2);
    console.log("O2:", model.O2);
    console.log("AR:", model.AR);
    console.log("Total Mass Density:", model.TotalMassDensity);
    console.log("H:", model.H);
    console.log("N:", model.N);
    console.log("Anomalous Oxygen:", model.AnomalousOxygen);
    console.log("Exospheric Temp:", model.ExosphericTemp);
    console.log("Temperature at Alt:", model.TemperatureAtAlt);

Resources

• C++ Source
• Original C source code
• Official Fortran source code
• CCMC Modelweb description
• NRL description

Prerequisites

• CMake >= 3.13
• GNU gcc
• Emscripten SDK (for WASM build)
• make

Installing Emscripten

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
./emsdk install latest
./emsdk activate latest
source ./emsdk_env.sh

Ensure emcmake and emcc are in your PATH:

which emcmake
which emcc

Build

Native build

make

WASM build

make wasm

For WASM artifacts, use the files in the bin/wasm/

License

Apache 2.0