Specific Issues
Space Shuttle missions to the International Space Station were restricted by beta angle cutout. Beta angle is defined as the angle between the orbit plane and the vector from the Sun. Due to the relationship between an orbiting object's beta angle (in this case, the ISS) and the percent of its orbit that is spent in sunlight, solar power generation and thermal control are affected by that beta angle. Shuttle launches to the ISS were normally only attempted when the ISS is in an orbit with a beta angle of less than 60 degrees.
Read more about this topic: Launch Window
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