# Questions tagged [inclination-change]

Questions about changing the orbital plane of a trajectory.

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### At which direction do you apply thrust to perform an inclination change maneuver?

Assume that the vehicle is already at the orbital node. No combined plane changes are included. At which direction is the thrust applied to do an inclination change maneuver? So far, Google hasn't ...
541 views

### How exactly did Jupiter change Ulysses orbital plane from nearly ecliptic to polar?

Ulysses spacecraft trajectory is truly amazing. Utilizing gravity assist from Jupiter it was sent into polar orbit around the Sun. I can understand gravity assist concept, I can also (intuitively) ...
2k views

### Change of inclination using low thrust

I am studying low-thrust maneuvers, in particular a change of inclination only. According to (Ruggiero et al., 2011)[1], if one writes the perturbation force in the Gauss planetary equations in terms ...
186 views

### what is 'f' (true anomaly) for in the orbital inclination change equation

I've been trying to make sense of the formula for an orbital inclination change for an elliptic orbit. This is for an orbit that is not altered in any way apart from its inclination. The equation from ...
457 views

### How to attain an equatorial orbital inclination from a non-equatorial launch site?

The orbital inclination of a satellite is limited to inclinations roughly equal or greater than the latitude of the launch site, unless additional energy is expended for an orbital plane change. In ...
229 views

### Biggest orbital inclination change done in Earth's orbit

Generally orbital inclination change is said to be (fuel) expensive. What is the biggest orbital inclination change (in degrees) done in Earth's orbit for an orbiting object? Can this be broken down ...
15k views

### How to calculate Orbital Inclination knowing the launch azimuth and launch latitude?

A new spaceport is proposed for Camden County, Georgia (USA). The latitude is 30.56N and the only available launch azimuth is 123 degrees. What is the resulting LEO without mid-course maneuvers? Can ...
181 views

### North-South Satellite Manuever

I am doing North-South manuever for GEO satellite. My purpose is to reduce the inclination. My initial inclination is 0.07 deg, and my target inclination is 0.0002 deg. I have tried the maneuver in ...
48 views

### Does better satelite propulsion help selling secondary payloads?

Generally orbital inclination change is said to be (fuel) expensive so everyone is trying to reach their final orbit straight from the launch vehicle. Small launch vehicles (Rocket Lab etc.) reach ...
7k views

### Why is it most efficient to change orbit inclination while crossing the equator?

At T+26:31 into the SpaceX ANASIS-II Mission Livestream, the host mentions that the mission trajectory calls for an orbital inclination change which is performed when the orbit of the second stage and ...
5k views

### Why is it best to perform an orbital inclination change at apoapsis?

Wikipedia on its page on efficiency of orbital inclination change writes: However, maximum efficiency of inclination changes are achieved at apoapsis, (or apogee), where orbital velocity V, is ...
139 views

### Could any modern launch vehicle have put Ulysses in it's polar heliocentric without going to another planet first?

This answer to Why aren't satellites launched into a Polar LEO to get into Polar Heliocentric Orbit? leaves me wondering if it could be done today without the trip to Jupiter. Could a replica of the ...
1 vote
807 views

### Satellite inclination, 3D scanning of earth's surface

Has any attempt been made to change the "plane" of the orbit (not altitude) of a satellite, across earth's diameter, continuously in small steps, from pole to pole for a satellite with zero ...
212 views

### Inclination Maneuver of GEO Satellite

I have performed inclination maneuver for GEO satellite at ascending or descending node. The inclination of the satellite is 0.05 deg. Then I performed the maneuver so the inclination change to 0....
323 views

### Would lunar flyby be less costly in delta-v than direct change from ISS's to Hubble's orbit?

The question Has anything ever executed an orbit change such as between ISS and Hubble? has a in interesting answer. It made me wonder, would something like the (patented) Lunar Flyby technique use ...
154 views

### Why does TDRS 1's inclination evolve so much differently than that of all the others starting in 1995?

The plot below is from the question Why do the geosynchronous TDRS satellites have this distribution of inclinations?, and the explanation says Inclination and mean motion (rev/day) for TDRS ...
230 views

### Inclination and latitude of GEO satellite

My satellite inclination is almost zero, but the latitude that I got was almost 0.1. In my mind, the latitude is should be near zero when the inclination is zero, but as I explain above, I got ...
910 views

### What is the optimal inclination change strategy?

Consider a transfer between two circular orbits of similar radius, the only difference being the inclination difference, $\alpha$. What's the minimal $\Delta v$ required to perform this transfer? ...
143 views

### Delta-v cost of longitudinal plane change correction?

In a recent question, the slow drift of a landing site on a rotating body relative to an orbiter came up. This would sometimes require a plane change correction when one desires to recover the ...
242 views

### How will Chandrayaan-2 reach a polar orbit?

This Wikipedia article says the the Chandrayaan-2 orbiter will be in a polar orbit above the moon. The orbiter will perform its mission for one year in a circularized lunar polar orbit of 100 × 100 ...
92 views

### How can I change plane (inclination and OMEGA) during a bielliptical transfer?

I'm trying to minimize deltav in a transfer between two elliptical orbits. The 'standard' strategy the professor provided consists in a change of inclination and RAAN and then a bielliptical or ...
201 views

### How do long range space probes adjust trajectory?

More specifically, after the main launch adjustments have been made using the primary boosters and temporary adjusting propellants how might even the slightest trajectory and orientation corrections ...
260 views

### What delta-v per orbit would a spacecraft need to hover next to Saturn's rings?

In order to collect Saturn's ring particles for sample return to Earth, a spacecraft would need to share the orbit of this debris. If it is inclined it will have to pass through the rings twice each ...
2k views

### Best time to perform an orbital inclination change — during ascent, or once in circular LEO?

Given that the $\Delta V$ required to perform an orbital inclination change is proportional to velocity, I was wondering when the best time to perform such a maneuver would be. Would it be best to ...
656 views

### Oberth Effect for non-tangential acceleration

Due to the Oberth Effect, it is most efficient to accelerate a spacecraft along its orbit at or as close-as-possible-to periapsis, and decelerate within close proximity to apoapsis. But all ...