120 results

The SGP4 model to calculate orbital state vectors of near-Earth satellites

Precise modeling of satellite's perturbed motion (special perturbations approach)

Compute the Earth's magnetic field at points in space according to the IGRF model.

Satellite Orbits: Models, Methods and Applications

Various plotting/drawing functions that can be saved as KML output, and loaded in Google Earth

Solar Position Algorithm for Solar Radiation Applications

Contains functions for declination, solar longitude, radius vector, equation of time, times of sunrise and sunset, sun angles and azimuths.

Computes sunrise and sunset times from any geographical location on Earth, and computes the geolocation from sunrise/sunset times.

Plot earth in 3D

DE430 spans from 1549-12-21 to 2650-01-25 and is based on the International Celestial Reference Frame (version 2.0).

Geocentric equatorial position of the Sun (in [m]), referred to the ICRF

DE405 covers 1599-12-09 to 2201-02-20. Referred to the International Celestial Reference Frame.

Matlab based application to predict the orbit and track the geostationary satellites in real time.

variation on the SPHERE command to facilitate plotting of orbital trajectories

Integrate n-body trajectories from the Earth to the Moon. Includes non-spherical Earth gravity.

Lunar High precision Orbit Propagator

The SGP8 model to calculate orbital state vectors of near-Earth satellites

Satellite Gravity Field Missions: Simulation Scenarios

LOWTRAN7 is an Air Force Research Laboratory (AFRL) atmosphere radiance and transmittance model published August, 1988.

Example of creating a 3D textured Earth globe

This GUI lets you plot orbits around Earth interactively.

Visualize Classical Orbital Elements

Optimization Toolbox version of a MATLAB script that solves the two impulse, patched-conic interplanetary trajectory problem.

3D Visualization of SUN, EARTH and Moon

MATLAB script that solves the non-spherical gravity-perturbed two impulse Hohmann orbit transfer problem.

User defined interplanetary mission design using the method of patched conics.

Estimate Sunrise and Sunset Times

This package allows for the easy computation of multiple parameters for space objects.

From initial positions and velocities, the motion of planets, comets and spacecraft can be modeled.

Optimization of interplanetary trajectory correction maneuvers (TCM) during Earth-to-Mars spaceflight using the SNOPT algorithm.

Optimization Toolbox version of the MATLAB script that determines optimal Earth-to-Mars impulsive TCM maneuvers.

Prediction of solar eclipse and its duration using the time of new moon

Compare how similar two geomagnetic field models are by producing a sensitivity matrix of their Gauss coefficients.

Analytic ephemeris of the Sun and inner planets (Mercury, Venus and Mars) valid between -4000 B.C. and +2800 A.D.

OTB/fsolve version of the lambert4.m MATLAB script which solves the gravity-perturbed Lambert problem

In this example we will explore some data on exoplanets - planets outside our own solar system.

The computer programs cover topics of interest in spherical astronomy and celestial mechanics.

Read Earth Observing System (EOS) data products in HDF format and visualize them in MATLAB(R).

Two-dimensional trajectory analysis of solar sail Earth-to-Venus and Earth-to-Mars missions.

Constants and coordinate conversions for WGS84 Earth shape

MATLAB script for solving the orbital initial value problem (IVP) for satellites in Earth orbit.

Orbit Determination from Tracking and Data Relay Satellite Measurements

A function to create an animation of the GPS constellation and working principle (pedagogic purpose).

Determines optimal, two-dimensional low-thrust Earth-to-Mars interplanetary trajectories.

Optimization Toolbox version of the tlto_matlab script used to design preliminary lunar missions from Earth park orbit to B-plane encounter.

Function designed to be used by Mat-lab's ode45 for gravity simulation of a projectile being affected by the Earth and the Moon's gravity

Functions to plot the solar path in the Earth-based reference frame

Two MATLAB scripts for the design and long-term analysis of frozen orbits.

Example of using Matlab to control Google Earth via the Google Earth API.

The Albedo Toolbox provides functions for calculating the Earth albedo illuminating a spacecraft.

Optimization Toolbox version of a MATLAB script that can be used to model finite-burn interplanetary injection from a circular Earth orbit.

A suite of MATLAB functions for converting between geodetic and geocentric coordinates.

Predict the times of rise and set of celestial bodies. Compute and display topocentric coordinates (azimuth and elevation) of these events.

perform a parametric “sweep” of ballistic interplanetary trajectories from a user-defined Earth park orbit to encounter at Mars

A function to create an animation to model the orbitography and the gravitational field of a star - planet - satellite system.

Numerically integrate the orbital equations of motion of an Earth to Mars interplanetary trajectory.

Computation of rising and setting times of major planets, the Sun, and the Moon utilizing the iterative method

Transforms position between a number of geo- and heliocentric coordinate frames

A function to make a gif animation of some light beams deflected by the gravity field of a star.

System of point-masses following inverse square law