orbital height

or·bi·tal height

the distance between the midpoints of the upper and lower margins of the orbit.
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The orbital height of the satellite has been modified to 600 km above the earth's surface compared to 690 km, which is the current orbit of DubaiSat-1.
The launch characteristics such as the orbital height, inclination and local time of descending node will also be featured.
orb] it's orbital height plus Earth radius for an Earth-based satellite.
The $10million Ansari X Prize was last week award-ed to Scaled Composites for launching Spaceship One, a privately built, reusable, craft to orbital height twice within a fortnight.