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Better GPS logging


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Adam N
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Posts: 14, Visits: 6
Hello

I'm often flying a special flights (measurement flights) following special patterns,
where the flight log data are then used to verify a specific parameters
of a new radar and mlat systems which we are developing.

For this purpose,
I have used SkyDemon as a non-definitely-accurate logger, for a flight path review on ground
(along the G1000 log on sd-card, but while somehow precise, this is slow - once per second).

Unfortunately, in the KML/GPX file I get from the SkyDemon,
there are wide gaps (sometimes, another data point is logged within a few seconds,
sometimes the gap is just one second, but never shorts, and often much wider).

EDIT: adding a note about the "gaps" - the GPS device (Garmin GLO) is definitelly pushing NMEA messages over BT, in a high rate and constantly. So I would say these gaps are created (maybe on purpose, like due to filtering or such a feature) in a software (SD?).
-‌
‌‌
I would like to ask for a new feature of the SkyDemon,
to enable (on-demand, somewhere in menu, perhaps) a much less granular logging,
or even better yet,
a direct non-filtered raw NMEA-data capture to a file (along the KML/GPX files with a possibly also more precision).

I'm unsure on how hard that would be, but it would definitelly be of a use to myself.
For the rest of the community - perhaps also as well, being able to see their past flight path with more detail,
I can imagine the other pilots would also like that update.


Note.
Sure, we can do flights with a special instrumentation,
but that typically is just the "final flight" through the project;
there are many more flight where an location output made out of a Garmin GLO is quite sufficient,
and this is what this forum post is aimed at.

thank you,
 adam‌

Edited 8/25/2017 10:46:21 AM by Adam N
Tim Dawson
Tim Dawson
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The frequency of data capture for flight logging in SkyDemon is more than sufficient for its intended purpose, which is the future analysis of flights.

If you want something special for a different purpose, you'll probably want to use specialist software.‌‌ We will not be implementing special-purpose high-frequency logging in SkyDemon as it's a mass-market product.
Adam N
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Hello, thank you for answering the topic.
I do understand the answer and it is fair.
‌‌
I have finally solved it using the com0com on a  PC notebook, having the GLO connected to Win10 via BT RFCOMM as a COM port (this was not easy to do, see the other manual on how to do that - but it works, yes), and then having the com0com with hub4com replicating the output to two another (virtual) com ports, one feeding the SD and another one feeding Putty‌ (which saves the whole raw stream to a file). Given that GLO can allow up to four BT clients to connect, my default Android tablet setup (running SD) works nicely along all this.

So no issue, it would have been comfortable to let SD do it (no need for an additional computer) but - at the end of a day, it works for me.‌‌

GO

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