Tutorials

1. Stationary orbit and above a specific region:

The easiest way to match the the region and the orbit at the same time is to be very close to circular orbit, with Ap or Pe at the right height, wait there until your satellite is at the waypoint (ideally near Ap or Pe) and circularize. The lower your eccentricity, the better the result but the longer it will take. If you use a very eccentric orbit, it might be hard to "hit" the waypoint.

If you now your launcher very well, you can launch direct to stationary and, with a right launch window, directo to the waypoint, once there, just circularize your orbit. It's harder to do and will be very linked to you launcher rocket, but it's the more realistic way to do it.

Once in orbit, try to set you Semi-Major Axis (SMA) as close as possible to the stationary SMA (3.463.334,04m for Kerbin, the Ap (for a circular orbit) is the SMA minus Kerbin radius (2.863.334,04m)). Your orbital period is determined by your SMA, and doing so you make or orbit as synchronous as possible. The lower your eccentricity the better as well, so your satellite is stationary rather than synchronous.

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2. Tundra, Kolniya or other synchronous orbit and above a specific region:

This might look a lot harder than the previous one, because the waypoint will be rotating at a fixed altitude and latitude, so it won't follow the orbit, it will only match your orbit at Ap once a day. But this only a little harder to do. You have to hit the waypoint at the same time you reach Ap. Again, te lower you eccentricity, the better will be your chances of success.

You can calculate how much time will take for you to do so, given your current orbit, doing the following:

• Wait for the waypoint to hit your Ap and take your time to Ap
• Subtract you orbital period form the (semi)synchronous period
• Divide the time to Ap that you measured by this one and this will be the amount of orbits you will have to do

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3. Multiple satellites at the same launch (Navigational Constellation building):

For some constellations you'll be asked to launch more the one satellite at once. Those sat will all be in the same orbit, but the shoul be spaced out in the orbit. To do so, you need to first make sure of two things:

• Your upper stage has enough delta-V to reach the specific orbit with all the satellites still on it and have some spare for raising Ap or lowering Pe until your period is (X+1)/X or (X-1)/X of the final orbit (X being the number of satellites your are launching, example: your are launching 3 satellites, X =3 so your period should be 4/3 or 2/3 of the final orbit);
• Each of the satellites has enough delta-V to circularize to the final orbit.

Once you have a rocket and a satellite that can do this SAVE. This is very important since it's possible that if you fail, you won't be able to revert your flight and the contract won't be able to be completed.

That being said, launch, reach the orbit, and do the same as you did in the previous section. Once you reach the waypoint and circularied, change you Ap or Pe so that your period is (X+1)/X or (X-1)/X (as said above). Do so AT the waypoint. Doing so, you will match the waypoint every X orbits.

Decouple one sitellite per orbit and circularize at the right height and you are done! Don't forget to rename the satellite after, as the contracts will ask for different name to make sure you are using different satellites.

Tip: for the satellites decouplers, set the ejection force very low, so you have as little as possible disturbance on your orbit, but don't set it to 0, for some separation is need. Be ware of your orientation after you ecouple so you don't hit you rocket when burning.

Obs: The waypoint in this contract is only for guidance and don't need to be reached for contract completion.