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Old February 10th 19, 05:59 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,601
Default GPS week rollover issue

Thanks.Â* Way more complex than needed for my flying - completed my
diamonds with camera and barograph.Â* Now I just fly for fun and use
OLC/Skylines to extract the data for my logs.

On 2/10/2019 10:14 AM, Martin Gregorie wrote:
On Sun, 10 Feb 2019 09:32:19 -0700, Dan Marotta wrote:

This raises a question with me.Â* I've often heard that Cambridge started
the whole GPS flight logging thing.Â* If that is true, why did FAI come
up with a different file structure?Â* If it is true, why not simply use
the Cambridge file?Â* Is it not "secure" enough?

Did the Cambridge file include baro height as well as GPS?
What about the task, pilot, glider and other stuff in the header, i.e.
A,C and H records?

FWIW, now that the use of finish rings and variable barrel size
turnpoints is becoming common in some countries the IGC 'C' records
(which list the start and end of a task as well as the turnpoints) really
need extending to allow the logger to record the type and size of all the
items that define a task, especially where variable barren sizes are used
in a handicapped event.



--
Dan, 5J