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Re: [Paparazzi-devel] gps_alt and gps_hmsl

From: Felix Ruess
Subject: Re: [Paparazzi-devel] gps_alt and gps_hmsl
Date: Thu, 13 Jan 2011 16:56:54 +0100

Hi Martin,

maybe someone can enlighten me about the difference between gps_alt and
gps_hmsl in the (fixedwing) GPS interface?

the one is for the Ellipsoid and the other for the Geoid. It was added to be sent over to the ArduIMU that uses it if "barometer" is enabled. As that is never the is unused.

That is what would probably make sense, but this is not the case, both is set to hMSL from the NAV_POSLLH message. (Unless you still have an older Ublox with the UTM message..)

Cheers, Felix

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