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.

Filter by
Sorted by
Tagged with
4
votes
2answers
2k views

How does one dogleg from Florida to a sun-synchronous orbit?

From NASA Spaceflight's article SpaceX Falcon 9 launches first NRO mission with NROL-76: The NROL-76 launch was not to be targeting a sun-synchronous orbit, typically used by the NRO’s optical ...
13
votes
2answers
3k views

Why would Sun-synchronous orbits be impossible around perfectly spherical bodies?

This is a special case follow-up to Are sun-synchronous orbits possible around any body? Reading Wikipedia on Sun-synchronous orbit a few days ago when trying to refresh my memory on orbital mechanics ...
13
votes
1answer
867 views

Are sun-synchronous orbits possible around any body?

Sun-synchronous orbits are popular around Earth, and the Mars Reconnaisance Orbiter uses one as well (so I think Wikipedias definition as a geocentric orbit is wrong). Considering that probably any ...
2
votes
1answer
215 views

Is there a significant difference between launching a polar orbit mission south from New Zealand versus launching it north?

The Channel News Asia article New Zealand launches into space race with 3D-printed rocket says: Ships and planes need re-routing every time a rocket is launched, which limits opportunities in ...
4
votes
2answers
505 views

MOM's NOT-so-sun-synchronous orbit about Mars - how large is it's J2?

edit: See my supplementary answer below for additional information. @Hohmannfan nailed it. This question and answer started me wondering - how big is the J2 (oblateness) term of Mars' gravity ...
11
votes
2answers
2k views

Why does the Sun-synchronous orbital plane rotate?

I've seen this movie: It shows Sun-synchronized orbit of a satellite. What causes this orbit to be Sun-synchronized? I mean, from what I know, it shouldn't rotate as ...
8
votes
2answers
1k views

Are sun synchronous orbits possible for any place on Earth?

Do sun-synchronous orbit pass any spot around Earth at a specified local time? If yes or no, what is the reason? (I know that this type of orbit passes everywhere at the equator at the same local time....
4
votes
4answers
7k views

Sun synchronous orbit and LTAN

I have to size the electric power system for a satellite on a circular, sun-synchronous orbit at 800 km altitude. In the problem I have been given the LTAN (Local Time of the Ascending Node) also, ...
8
votes
1answer
5k views

How Local time of a sun synchronous orbit is related to Right ascension of ascending node?

My question may sound naive and hence would like to apologise if this question is already answered in same or other form in this forum. How does ...
6
votes
3answers
361 views

Are sun-synchronous orbits always North to South?

So someone told me that weather satellites orbit from north to south generally because that helps them to obtain a sun-synchronous orbit (his explanation for why this was true was too complicated for ...
1
vote
1answer
153 views

What is the darkest orbit around Earth?

What orbits around Earth has the least and most sun light exposure? I wondered: When taking pictures either of Earth or otherwise with various telescopes in orbit, does it help to be in Earth's ...
4
votes
1answer
68 views

Mechanics of Sun-Synchronous Orbit & North Korea's KMS-4

QUICK QUESTION: Is North Korea's KMS-4 in a proper Sun-synchronous orbit? https://www.n2yo.com/?s=41332 2016-009A FOLLOW-UP QUESTION: How do I tell? I want to understand the mechanics. RESEARCH:...
3
votes
0answers
186 views

Is there a Lunar Sun-synchronous orbit over the terminator? [duplicate]

Dusk/dawn Sun-synchronous orbits are possible at Earth thanks to the fact that Earth is a bit flattened. Would it be possible with a similar orbit around the Moon? The flattening of the Moon seems to ...
3
votes
0answers
393 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 ...
0
votes
1answer
141 views

Satellites that take advantage of, or require constant availability of sunlight on the spacecraft itself, available in Sun-synchronous orbits?

ditto: "Are there satellites that take advantage of, or require constant availability of sunlight on the spacecraft itself, available in Sun-synchronous orbits?" This question is an offshoot of this ...