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How did Phoenix manage to orientate itself E-W when Landing
Sandro
post Jun 4 2008, 01:20 PM
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Hi together

During the hot phase of the EDL-sequence with thrusters active, phoenix made automatically many different attitude controls. Among them was the orientation of phoenix's arm to the north. I wondered how phoenix found out his actual orientation and where north was. Since Mars does not have a strong dipol magnetic field like earth, I assume there must have been some other way to figure out the current orientation?!

I thought of maybe using the sun? But this would have been not easy at all!

Does anyone know how this was done?

Many thanks in advance!

Regards,
Sandro
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Posts in this topic
- Sandro   How did Phoenix manage to orientate itself E-W when Landing   Jun 4 2008, 01:20 PM
- - jmknapp   QUOTE (Sandro @ Jun 4 2008, 09:20 AM) I w...   Jun 4 2008, 02:20 PM
|- - ugordan   Are you sure propagation of IMU data is good enoug...   Jun 4 2008, 02:24 PM
|- - MahFL   I am pretty sure the IMU's contolled the posit...   Jun 4 2008, 02:35 PM
|- - jmknapp   QUOTE (ugordan @ Jun 4 2008, 10:24 AM) Ar...   Jun 4 2008, 03:26 PM
- - nprev   I can see IMUs providing that degree of accuracy, ...   Jun 4 2008, 04:55 PM
- - dvandorn   Yep -- this is what's called a stable matrix. ...   Jun 4 2008, 05:51 PM
- - Sandro   oh man, didn't think the answer is going to be...   Jun 5 2008, 07:19 PM

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