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Reference Applications

Create and analyze reference applications in MATLAB®

The reference applications are fully realized fixed-wing solutions to aircraft analysis, including static stability and linearization, and functions that support the analysis of spacecraft models in Aerospace Blockset.

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Satellite Constellation Access to a Ground Station

Satellite Constellation Access to a Ground Station

Demonstrates how to set up access analysis between a ground station and conical sensors onboard a constellation of satellites. A ground station and a conical sensor belonging to a satellite are said to have access to one another if the ground station is inside the conical sensor's field of view and the conical sensor's elevation angle with respect to the ground station is greater than or equal to the latter's minimum elevation angle. The scenario involves a constellation of 40 low-Earth orbit satellites and a geographical site, located at MathWorks Natick. Each satellite has a camera with a field of view of 90 degrees. The entire constellation of satellites is tasked with photographing MathWorks Natick, which is located at 42.3001 degrees North and 71.3504 degrees West. The photographs are required to be taken between 12 May 2020 1:00 PM UTC and 12 May 2020 7:00 PM UTC when MathWorks Natick is adequately illuminated by the sun. In order to capture good quality pictures with minimal atmospheric distortion, the satellite's elevation angle with respect to MathWorks Natick should be at least 30 degrees (please note that 30 degrees was arbitrarily chosen for illustrative purposes). During the 6 hour interval, it is required to determine the times during which each satellite can photograph MathWorks Natick. It is also required to determine the percentage of time during this interval when at least one satellite's camera can see MathWorks Natick. This percentage quantity is termed the system-wide access percentage.