Issue with csv log of ads-b received frames

[saifuhameed]

When loading back csv log file, the location of aircrafts are totally wrong, most of them indicates they are more than 10000km away.

[srcejon]

Is your position set correctly in Preferences > My Position

[saifuhameed]

Is your position set correctly in Preferences > My Position

Yes. Live data in 'ADS-B data' window and map are showing correctly. Maximum distance I reached on live table/map is around 300Km. After many hours of logging (1146079 frames in a file), when the file is opened back some of the aircraft positions shows very far (>10000km) that is unrealistic.

[saifuhameed]

Is your position set correctly in Preferences > My Position

I have only very little knowledge about the sdrangel code and ads-b decoding of flight location, but I had a quick look into the logger files. What I understood is that frames are send to decoder from the file line by line but 'IGNORING' the time stamp of the frame logged to the file. There is a possibility that same airplane returning back after many hours (after landing and take-off) so the location calculation from received frame (even and odd frames) might be offset by many hours at a certain time and this may lead to wrong calculation for few frames? May be I'm totally wrong on this but highlighting a concern just came in my mind.

[srcejon]

Can you attach the .csv file to this issue? Thanks.

[saifuhameed]

I have shortened the data to around less than 35000 frames to show at least 3 wrong distances, zipped file 255kb. How can I send you this file personally?

[srcejon]

You can email me a - but I don't think anything in there can really identify you.

[saifuhameed]

You can email me at- but I don't think anything in there can really identify you.

Done, please check in your SPAM folder too.

[github-actions]

This issue is going to be closed due to inactivity

[saifuhameed]

Can you attach the .csv file to this issue? Issue exists.

Any feed back regarding changes in code?

[srcejon]

Any feed back regarding changes in code?

Yes, it's a problem related to not using the timestamp. Have a local fix, that I'll release along with a few other updates fairly soon.

[saifuhameed]

you fixed it?. great Sent from Outlook for Android<https://aka.ms/AAb9ysg>

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________________________________ From: srcejon ***@***.***> Sent: Wednesday, April 16, 2025 12:09:45 PM To: f4exb/sdrangel ***@***.***> Cc: Saifudheen ***@***.***>; Author ***@***.***> Subject: Re: [f4exb/sdrangel] Issue with csv log of ads-b received frames (Issue #2406) Any feed back regarding changes in code? Yes, it's a problem related to not using the timestamp. Have a local fix, that I'll release along with a few other updates fairly soon. — Reply to this email directly, view it on GitHub<#2406 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AMY5MWKR22VGA4T75EK2ZY32ZYM5TAVCNFSM6AAAAABXOIM2MGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQMBYHEYTGOBVGE>. You are receiving this because you authored the thread.Message ID: ***@***.***> [https://avatars.githubusercontent.com/u/57259258?s=20&v=4]srcejon left a comment (f4exb/sdrangel#2406)<#2406 (comment)> Any feed back regarding changes in code? Yes, it's a problem related to not using the timestamp. Have a local fix, that I'll release along with a few other updates fairly soon. — Reply to this email directly, view it on GitHub<#2406 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AMY5MWKR22VGA4T75EK2ZY32ZYM5TAVCNFSM6AAAAABXOIM2MGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQMBYHEYTGOBVGE>. You are receiving this because you authored the thread.Message ID: ***@***.***>