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Kerbal Space Program - Tutorial - How to get to a specific height

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Uploaded on Jul 28, 2011

Getting the crew where you want them and back:

1. Get into a low orbit
2. Make the orbit circular
3. Get to the desired altitude (using a Hohmann transfer orbit)
4. Get back to about 50 km (using a Hohmann transfer orbit)
5. De-orbit

1. Get into orbit
-Launch
-At about 10 km slowly start lowering the nose in the desired heading (in this case 090).
-The horizontal speed should be at least 2349 m/s at 40 km.

2. Make the orbit circular
-Likely you're now going up in an epiliptical orbit. Calculate the orbit-speed of the altitude you expect to be at at apoapsis (highest altitude relative to Kearth).
-If you overshoot try again at the new apoapsis.

3. Get to the desired altitude (using a Hohmann transfer orbit)
-Calculate the speed needed to reach the desired altitude
-Example:
Altitude 60.000 m - 300.000 m (altitude of ISS)
Required acceleration 2312,8 m/s - 2484,4 m/s

At apoapsis accelerate
-Example:
An apoapsis of 305.690 m requires 1980,6 m/s for the orbit to become circular.

4. Get back to about 50 km (using a Hohmann transfer orbit)
-Going to a lower orbit enables landing to be more precise. It doesn't take extra fuel since the burns involved are 2 deceleration burns.
-An altitude of 50 km allows you to overshoot slightly without entering the atmosphere.
-Example:
Altitude 305.200 m - 50.000 m
Required deceleration 1974,9 m/s - 1805,6 m/s

At periapsis (lowest altitude relative to Kearth) decelerate.
-Example:
A periapsis of 48.790 requires 2332,7 m/s for the orbit to become circular.

5. De-orbit.
-Use your remaining fuel.

Made by Atreides
Youtube-channel: EagleNED

Programs used:

Kerbal Space Program v 0.8.5
http://www.kerbalspaceprogram.com/

Kerbal Space Program Calculator v 0.8.1
(by Warringer)

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