Harry's GPS Suite Forum

I'm using a Dual SkyPro XGPS160... I don't think there is an option to lower its update rate from 10Hz...??

LapTimer / Administration / Sensor List / Dual XGPS GNSS has an option. Not sure to which update rate it switches (need to check the code), please try the option.

Harry

I have the same issue but it looks like there is acceleration recorded, just very erratic. Harry, I did your instructions to recalculate and I see the following - see attached.

Prior to doing the recalculation there is maybe 3-5 recordings only.

You need to smooth the data. Currently, noise of positions is the dominant source of acceleration. Shift the slider to the right. Light means no smoothing.

- Harry

Only applying "strong" smoothing eliminates the spikes. However I think something is wrong because it is showing no more than 0.75g on any corner. I am fairly experienced driver on R-compound tires that can hit 1.5g pretty consistently in other times.

I have the same issue! Been really frustrated since I have a track day tomorrow. I am pretty sure it's a bug introduced after the latest update. On the video preview screen while recording, the accleration values are displayed correctly. But they are not saved if an external GPS (dual skypro) is used. Only if I disable the external GPS and use internal (1hz) one, the values are saved.

In case I am posting two duplicated replies. Please delete my earlier one.

godnamnit wrote:I have the same issue! Been really frustrated since I have a track day tomorrow. I am pretty sure it's a bug introduced after the latest update. On the video preview screen while recording, the accleration values are displayed correctly. But they are not saved if an external GPS (dual skypro) is used. Only if I disable the external GPS and use internal (1hz) one, the values are saved.

In case I am posting two duplicated replies. Please delete my earlier one.

Please make sure you see a GPS update rate of 10 Hz while driving. In case you see 10 Hz and do not get acceleration, it is a problem with app/adapter etc. In case you do not get 10 Hz, it is a problem with the GPS connection.

- Harry

Harry wrote: Please make sure you see a GPS update rate of 10 Hz while driving. In case you see 10 Hz and do not get acceleration, it is a problem with app/adapter etc. In case you do not get 10 Hz, it is a problem with the GPS connection.

- Harry

While driving, I see both the 10hz GPS update rate (skypro) and my phone's (30hz) internal acceleration sensor working. The acceleration data is just not stored in log.

godnamnit wrote:

Harry wrote: Please make sure you see a GPS update rate of 10 Hz while driving. In case you see 10 Hz and do not get acceleration, it is a problem with app/adapter etc. In case you do not get 10 Hz, it is a problem with the GPS connection.

- Harry

While driving, I see both the 10hz GPS update rate (skypro) and my phone's (30hz) internal acceleration sensor working. The acceleration data is just not stored in log.

Same here. I had a track weekend 2 weeks ago, and no acceleration data is stored, except at S/F and split points. I have Dual SkyPro at 10hz.

Strong smoothing only seems to apply to lateral acceleration, as I still see very spiky behavior in the longitudinal axis.

ereynold60 wrote:
Same here. I had a track weekend 2 weeks ago, and no acceleration data is stored, except at S/F and split points. I have Dual SkyPro at 10hz.

Now here is something interesting / confusing. I exported my data to VBO and when viewed in CircuitTools, the acceleration data IS there... no smoothing or re-computation performed. So it must be in LapTimer's DB somewhere and just no showing in LapTimer screens or in Overlays ???