Timeline for How do Inertial Navigation Systems compensate for their inability to measure gravitational acceleration?
Current License: CC BY-SA 4.0
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| Dec 3, 2023 at 3:22 | history | edited | Woody | CC BY-SA 4.0 |
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| Dec 3, 2023 at 2:12 | answer | added | Organic Marble | timeline score: 5 | |
| Dec 2, 2023 at 8:36 | comment | added | Erin Anne | "gravitational ephemeris" is an interesting way to put it, but I think that was indeed the case for Apollo. I seem to recall a story--maybe it's in Eyles' "Sunburst and Luminary"--that Draper was convinced they could fly the Apollo missions on the INS alone without ground or sextant sighting updates. I think they managed to demo it once? I'll try to track the story down. but that would require position and velocity integration inside a model Earth-Moon(-Sun?) system to work right, as you say. | |
| Dec 2, 2023 at 7:40 | history | edited | Woody | CC BY-SA 4.0 |
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| Dec 2, 2023 at 4:27 | history | edited | Woody | CC BY-SA 4.0 |
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| Dec 2, 2023 at 3:43 | comment | added | Greg Miller | The IMU is just a sensor, it is used in combination with other instruments to produce a position. E.g. for Apollo, it was periodically corrected with a sextant: ion.org/museum/item_view.cfm?cid=6&scid=5&iid=293 . By contrast, Artemis uses a camera and a system programmed to detect individual features on the lunar surface. | |
| Dec 2, 2023 at 0:26 | history | asked | Woody | CC BY-SA 4.0 |