rowsandall acting on spurious data in speedcoach file

[Gregory Smith]

This is not a bug in rowsandall, but I wanted to log it. Today, I did a coastal row. The speedcoach was set to use GPS as the speed input, and appeared to operate correctly throughout. However, in the data export, there were spurious impeller based distance, pace and speed readings in some rows. I have no idea why. I will contact NK about it, but since most folks use GPS as the data source, and there’s a chance that there will be spurious Impeller values, I thought it could be a way that people copuld get messed up plots and not know why.

You might want to think through making an enhancement here.

1. add an option to choose Impeller or GPS as the data source. This could be a check box on the import form, or a magic command in the email import “speed-source gps / imp”.
2. Do a data consistency check on the impeller distance to see if it reasonably close to the GPS distance (say, within 10%). If it isn’t default to GPS based data.

Attached is the weird speedcoach file.

[Sander Roosendaal]

@Gregory Smith How would this create messed up plots on rowsandall.com?

[Gregory Smith]

@sanderroosendaal rowsandall saw data in the impeller columns and used it for pace. But the data was sparse and nonsensical. I fixed it by manually deleting that spurious data and replacing it with zeros.

[Sander Roosendaal]

@Gregory Smith Discussion with code snippet on Slack