Synchronize two Satellites?

[BlackDev]

Hey,

I've just installed enhanced navball, kw rockets and remote tech 2. Now I'm stuck at the point where I have to cover kerben with a satellite network.
I'm surely able to shoot the satellites up into an low orbit, so the ealry communication devices will work, but I run in a problem by synchronizing my satellites with each other.

Is there a way to get orbtis of two satellites synchron to each other? Maybe even a function of the enhanced navball I don't know yet? Or another mod that can accomplish that?

[Ottomic]

...Mechjeb?

[Istaitsu]

you can either match orbits and eye ball their reletive positions or download kerbal engineering redux and use the rendezvous readouts to be more precise, specifically you want to look at the phase angle to make sure they are in the right position

[duanevp]

The distance at which you orbit is a matter of speed. match speed and you match height above Kerbin. match height above Kerbin and you've matched speed. in a lower orbit you're flying slower. In a higher orbit you're flying faster. So, synchronizing a new satellite with an existing one is a matter of executing burns to either increase or decrease speed. It will change the height of your orbit but you'll also start to shift position relative to the first satellite. Once you've shifted your position relative to the first satellite then just match speed/orbital height again. they'll now orbit at the same altitude at the same speed and stay in the same positions relative to each other.

This is the same basic principle as getting two spacecraft close enough to dock, except that instead of using it to get closer, you're using it to position the two craft further away.

[BlackDev]

What does mechjeb do?

I know about the altitude, the problem is that space isnt 2D so if i manage to get the altitude/speed exact the same, there is stil the problem about the third axis.
And thats where I'm stuck now, i managed to get them rellatively close to each other in matters of speed/altitude but I'm correcting "up" and "down" all the time which leads to wrong movements on other points of the orbit.

The satellites should not be on a rondevou point but kind of delayed on their orbit so that they build a ring of satellites when all is done. Can engineering redux rondevou this? I have this mod installed and every satellite has a flight computer on stuck on them..

Does someone have a tutorial on the hand for such a problem solved with engineering redux or mechjeb so I could watch it in action?

[Istaitsu]

Originally posted by BlackDev:

I know about the altitude, the problem is that space isnt 2D so if i manage to get the altitude/speed exact the same, there is stil the problem about the third axis.
And thats where I'm stuck now, i managed to get them rellatively close to each other in matters of speed/altitude but I'm correcting "up" and "down" all the time which leads to wrong movements on other points of the orbit.

for this you need to point your sattelite at normal which is the pink markers on your navbal, then you need to thrust at the ascending/descending nodes which is were your orbits cross

Originally posted by BlackDev:

The satellites should not be on a rondevou point but kind of delayed on their orbit so that they build a ring of satellites when all is done. Can engineering redux rondevou this? I have this mod installed and every satellite has a flight computer on stuck on them..

again you need to pay attention to the phase angle of your two sattelites, for example i have 3 sattelites in kerbinsync orbit with each sattelite being 120 degrees apart from each other so they cover every longitute of kerbin

[Itharius]

Originally posted by BlackDev:

What does mechjeb do?

The question you should ask is, what DOESN'T mechjeb do?

[Ulrin]

Hi,

I put my com sat in kerbostationnary orbit, which is at 2.868.750,7 km high from Kerbin (no need to be so precise :D, and the speed is 1009 m/s, but dont worry about, as ure speed and altitude is link, if u made a circular orbit at 2868k ure speed will be close to), by this way, they dont move relatively too each other. Perso, i put one above KSC, and the two other 90° each side (they cant link KSC, but are link to the first one)

One mod i use before was Kdata, help for that cauz it indicate when ure at Geostationnary position. if u dont want, u can have an indication wiz ure period time, which have to be closest possible from 6h as Kerbin period.

U will need RCS, or small engine for be precise, and as always, prograde pt at periapsis increase Apophis altitude, retrograde decrease; and the opposite, prograde at apophis increase periapsis altitude when retrograde lower that point.

The difficult part is not to go to kerbostationnary orbit, but putting ure sat at the good place relatively to Kerbin, for that, remember that when u lower ure altitude, u go faster than an higher target (and "go to" if she front of u) and if u up ure orbit, u will go slower than ure target, enable her to meet u (even if ure target is a position relative to another sattelite)

Heres my short range com ring 4 example

http://steamcommunity.com/sharedfiles/filedetails/?id=293010636

[Ulrin]

But, for Mün, (and others) there's not geostationnary orbit due to Mün rotation, so ill put sat at 500km, but i have to correct regulary their relative position

[Istaitsu]

Originally posted by Facialjack:

Hi,

I put my com sat in kerbostationnary orbit, which is at 2.868.750,7 km high from Kerbin (no need to be so precise :D, and the speed is 1009 m/s, but dont worry about, as ure speed and altitude is link, if u made a circular orbit at 2868k ure speed will be close to), by this way, they dont move relatively too each other. Perso, i put one above KSC, and the two other 90° each side (they cant link KSC, but are link to the first one)


http://steamcommunity.com/sharedfiles/filedetails/?id=293010636

one thing to note is that they changed the rotation period of kerbin recently down to 6 hours so kerbin stationary orbit is now 2863.33 km

Originally posted by Facialjack:

But, for Mün, (and others) there's not geostationnary orbit due to Mün rotation, so ill put sat at 500km, but i have to correct regulary their relative position

for situtations like that i would recommend a knot orbit (the orbit used for GPS) which requires about 6 satelites

[BlackDev]

I will not put these satellites in geostationary orbit, my plan was to put it around 255.6km and then, in the furture putting some aditional in geostationary.

My problem is only getting the orbit of, lets say five, satellites as equal as possible. I startet a communication array mission before and it looked great in first time, but after some time they where much to asynchron to keep the distance i need to cover all of kerbin.

In 255km this happens alot faster then in geostationary as the planet blocks sight very soon.
Wasn't geostationary around 2.868km instead of 2.868.750km?

*edit*
Is there a tutorial about the tools and kind of this issue in the web? Havn't found one yet which explains my problem, only a few for getting the correct altitude for geostationary.. as mentiont altitude is not THAT big problem its more altitude in connection with angle..

[Ulrin]

Well, u know, Nasa have teams that check and correct orbit when needed, mechjeb seams to be ure solution as its an autopilot (but i dont use him so not sure if he can do what u need)
Check http://wiki.kerbalspaceprogram.com/wiki/Main_Page
and http://forum.kerbalspaceprogram.com/forum.php
that one is the site of creator of KSP, wiz all community life, some more experienced than me can maybe give u an answer

"one thing to note is that they changed the rotation period of kerbin recently down to 6 hours so kerbin stationary orbit is now 2863.33 km"

Ty Istaitsu, i didnt know that affetc kerbostannionary altitude, will check my sat 4 correction

[Istaitsu]

Originally posted by BlackDev:

I will not put these satellites in geostationary orbit, my plan was to put it around 255.6km and then, in the furture putting some aditional in geostationary.

My problem is only getting the orbit of, lets say five, satellites as equal as possible. I startet a communication array mission before and it looked great in first time, but after some time they where much to asynchron to keep the distance i need to cover all of kerbin.

In 255km this happens alot faster then in geostationary as the planet blocks sight very soon.
Wasn't geostationary around 2.868km instead of 2.868.750km?

*edit*
Is there a tutorial about the tools and kind of this issue in the web? Havn't found one yet which explains my problem, only a few for getting the correct altitude for geostationary.. as mentiont altitude is not THAT big problem its more altitude in connection with angle..

http://steamcommunity.com/sharedfiles/filedetails/?id=227399379&searchtext=remote+tech+2
This is the best tutorial i can think of off the top of my head, the information i think you want is in the "Setting up your first network" section.

Otherwise my only other advise is to match apoapsis, periapsis, and semi major axis as best you can and bring an ion thruster or RCS thrusters to correct the position every 60-ish orbits

*edit*
also the altitude for a stationary orbit is determined by the rotation period (or solar day) of a body in question. kerbin's day is 6 hours so you would need to have an altitude of about 2563.33lm (don't remember the exact altitude to the meter) for an orbital period of 6 hours

[BlackDev]

Thanks, I'll take a closer look on the guide and mechjeb2/engineering redux
I have a good amount of fuel in tanks that function as the satellites body and a very effizient kw rockets engine on my satellite setup, should give me enough capability to make all maneuvers that would be nessasary for a while