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Perigee height refers to the lowest point in the satellite's orbit above the Earth's surface. It is commonly measured in kilometers or miles and is a crucial parameter in orbital mechanics and satellite operations.
The calculator uses the formula:
Where:
Explanation: The formula calculates the perigee height by subtracting the Earth's mean radius from the perigee radius, which gives the altitude above the Earth's surface.
Details: Accurate perigee height calculation is essential for satellite orbit determination, mission planning, collision avoidance, and ensuring proper satellite operations and communications.
Tips: Enter the perigee radius in meters. The value must be valid (greater than Earth's radius for meaningful results).
Q1: What is the difference between perigee radius and perigee height?
A: Perigee radius is the distance from Earth's center to the perigee point, while perigee height is the altitude above Earth's surface.
Q2: Why is Earth's mean radius used instead of equatorial radius?
A: The mean radius provides a better average value for general calculations, though for precise orbital calculations, more detailed Earth models may be used.
Q3: What are typical perigee height values for different satellites?
A: Low Earth Orbit (LEO) satellites typically have perigee heights between 160-2000 km, while geostationary satellites have much higher perigee heights.
Q4: How does perigee height affect satellite operations?
A: Lower perigee heights result in higher orbital speeds and shorter orbital periods, while also increasing atmospheric drag effects.
Q5: Can this calculator be used for other celestial bodies?
A: This specific calculator is designed for Earth orbits. For other planets, you would need to use the appropriate planetary radius.