Questions tagged [sun-synchronous]

Questions about orbits utilizing nodal precession so that spacecraft are able to maintain the same local mean solar time at any given point of an orbit. The effect is achieved through choosing inclination and altitudes of the apses.

7 questions with no upvoted or accepted answers
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1answer
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formula linking RAAN and LTAN

I just want to ask if someone does possess the formula linking the local hour to the right ascension of the ascending node (RAAN). I will try to explain myself: I know that I want my satellite to be ...
4
votes
0answers
151 views

How can I find orbital parameters for a sun-synchronous orbit?

I would like to compute ephemerides for a satellite on a sun-synchronous orbit, starting with only the following parameters1: altitude or inclination; local time of the ascending or descending node; ...
3
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0answers
389 views

If a sun-synchronous orbit passes over the poles twice a year, how can it have a constant (e.g. 98°) inclination?

I am sooooo confused. The answer to Are sun synchronous orbits possible for any place on Earth? ends with In short, yes, sun-synchronous orbits are possible for any location on Earth. and mentions ...
2
votes
1answer
64 views

Maintenance manouvers for a Dawn-Dusk SSO?

I'm in charge of the ADCS for a class project, which consists on a 25U-cubesat, in a 650-km dawn-dusk Sun-synchronous orbit or SSO. What are the orbit correction/maintenance manouvers a spacecraft ...
1
vote
0answers
152 views

Length of time in a satellite spends in Earths shadow

I have come across a problem that has had me stumped for a while now. A spacecraft is in a Sun-synchronous Earth orbit with a =1.40 R⊕ and e = 0.2. The argument of periapsis is ω = 0◦ , and the ...
1
vote
0answers
143 views

Satellite Orbit-Sun Geometry of Sun synchronous Orbit

What is the difference in satellite orbit-sun geometry of Sun synchronous orbits of 6am local time , 9 am local time , 12 pm local time ?
0
votes
1answer
380 views

Rotation Of Line Of Apsides

Why does the line of apsides rotate in the plane of the orbit ? In case of a sun synchronous orbit does it have any effect on imaging accuracy or quality?