Forums > Windsurfing   Gps and Speed talk

ka72 Speed Reader now supports SBP files too!!

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Created by Dylan72 > 9 months ago, 26 Jan 2009
Dylan72
QLD, 660 posts
26 Jan 2009 6:56PM
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The SpeedReader at www.ka72.com/ now supports SBP files as well as SBN files. If you put in a file that spans multiple days, it will separate it into separate sessions (not pretty, but it works.) Multiple sessions from the same day are rolled in together and the scores calculated over them.

The site tries to determine whether you are using a GT-11 or GT-31 and displays either trackpoint Alphas or doppler Alphas accordingly. I'd appreciate some more testing here, to try and fool it into thinking a GT-11 file is from a GT-31. It uses the firmware revision number to check, and I'm pretty sure there are several more of those that I haven't encountered.

Dylan.

nebbian
WA, 6277 posts
26 Jan 2009 6:23PM
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Hi Dylan,

Great work! It split my SBP file into six, the way it should.

All numbers were spot on, including alphas

One minor point, it might be nice to put an extra <br> between results so that it's easier to see the separation of different days sailing.

Well done

Dylan72
QLD, 660 posts
26 Jan 2009 8:29PM
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nebbian said...


One minor point, it might be nice to put an extra <br> between results so that it's easier to see the separation of different days sailing.

Yah yah. Remember, I'm a software developer, I don't really care for the aesthetics!

Seriously, I know it doesn't look very nice at present (though I've just ducked back to the site and added a horizontal rule between sessions.) I'm trying to work out how to present quite complex data, and not wanting to spend too long on going down the wrong path, only to have to re-work huge amounts of stuff later.

Anyway, I'm glad it works for you. I'm still getting very minor variances for some of my calculated 1hr scores, but most everything else is working fine now.

Dylan.

evets
WA, 685 posts
27 Jan 2009 8:44AM
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Just ran my sbn through it, very impressed Dylan. Same results as realspeed

Dylan72
QLD, 660 posts
27 Jan 2009 11:54AM
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I've noticed that parsing out the firmware revision is not working correctly 100% of the time with SBP files. I need to do a little more work there, especially as it uses the firmware to work out whether to present Alphas as trackpoints or doppler.

Also, there is at least one submitted file that gives me an "out of memory" error when I try to process it. V. interesting, can't wait to get home and try to work out what is going on there.

Dylan

graceman
WA, 323 posts
27 Jan 2009 10:55AM
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Hi Dylan, Excellent with the sbp conversion.

Device: Navilink.GT11
V1.62(B1115)
Session Date: 20/01/2009
Number of Points: 2863
2 Second Peak (kts): 33.82
5x10 Average (kts): 29.85
1 Hr (kts): 11.36
Alpha 500 (trackpoints): 16.94
Nautical Mile (kts): 23.36
Total Dist (doppler km): 28.25

Compared to Realspeed:
33.82 29.85 11.73 16.94 23.36 26.16

Only slight differences between doppler and trackpoints in my set-up.
Great job



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"ka72 Speed Reader now supports SBP files too!!" started by Dylan72