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Publisher: GerSpatial
Price: 24.99 USD

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App Description

SatTracker is designed for real-world prediction of Earth-orbiting satellite ground tracks. It is very accurate and, with fresh sets of orbital elements downloaded from within the application, it will keep that accuracy indefinitely. It provides ground tracks for multiple satellites, like some other applications, but unlike any others, it will compute visibility for multiple ground stations.

SatTracker uses the SGP4 algorithms which are ideally tuned to the publicly-available orbital elements and, as a result, generates the most accurate orbits possible with these orbital elements.

As well as ground tracks, the application calculates daytime, twilight and nighttime regions as well as calculating when each satellite is in sunlight so that it is visible – assuming there’s no cloud. To help with this, SatTrackerBasic can also display global cloud cover updated hourly (though this requires a paid subscription to a third-party data-provider). The various items which can be plotted are configurable, and so is the representation. The map can be displayed in two map projections: a simple rectangular projection or as a pair of azimuthal projections centred on the North and South poles.

Powerful database functionality is built-in to allow the management of thousands of satellites and ground stations.


- plots Earth-orbiting satellite positions and ground tracks;
- Sun and Moon position (and Moon phase) are plotted;
- maps show the day and night coverage on the Earth;
- the time can be adjusted freely forwards and backwards, and run in simulated future or past times;
- current cloud cover is optionally downloaded and displayed;
- the location of the South Atlantic Anomaly (which can affect satellite operations) is shown for a given satellite;
- ground station horizons are plotted, taking account of the real horizon obstructions, for both transmit and receive links;
- ground stations are grouped into related sets;
- plots are either on a rectangular grid or a pair of polar projections;
- dark mode, retina display and Apple Silicon.

This application has actually been used in planning real satellite operations!

Note also that SatTracker is a not a video-games quality, 3d graphics simulation, and was never intended to be. It was designed with the needs of satellite professionals in mind, particularly those in Mission Control Rooms who need to see where relatively few satellites are with respect to the visibility horizons of the available ground stations. Specifically for these engineers, the location of the South Atlantic Anomaly is shown (as requested during the development phase of the App).

For a preview of what SatTracker v1.3 can do, please download the User Manual available at

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