# Apollo lunar descent guidance

##### Citations

482 citations

### Cites methods from "Apollo lunar descent guidance"

...A trajectory based on a quartic polynomial in time was used during the Apollo mission [5]....

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301 citations

### Cites methods from "Apollo lunar descent guidance"

...In the next sections, therefore, we extend the approach of [3] to solve the minimum-landing-error problem....

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212 citations

### Cites result from "Apollo lunar descent guidance"

...This is in contrast with other approaches that either compute a closed-form solution by ignoring the constraints of the problem [5], [14], propose solving a nonlinear optimization on board [6], [7], or solve a related problem that does not minimize fuel use [8]....

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185 citations

184 citations

### Cites methods from "Apollo lunar descent guidance"

...Workarounds for this exist that try to avoid these parts of the state space, as was most prominently done in the guidance system of the Apollo Lunar Module [22], or switch between alternative orderings of the parametrization each of which exhibit singularities in different areas of the state space....

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...Workarounds for this exist that try to avoid these parts of the state space, as was most prominently done in the guidance system of the Apollo Lunar Module [22], or switch between alternative orderings of the parameterization each of which exhibit singularities in different areas of the state space....

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...If it is detected, it requires a recovery strategy, in the worst case manual intervention as in the aforementioned Apollo mission [22]....

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##### References

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