Harry's GPS Suite Forum

The speed chart does not seem to show any speeds past 100 mph and I am not sure how to allow it to. I am not sure if the data does not go up past 100 MPH as the maximum speed reported by the laptimer app is 99.7 mph. There is a visible (to the point of appearing artificial) plateau in the chart. I am not sure how to resolve it. I also had not seen threads on this so far.

Attached are the laptimer exports and an image showing the plateau at 100 mph.



LapTimer-0003-20130601-121307.hlptrl: database in LapTimer XML format
LapTimer-0003-20130601-121307.kml: Google Earth KML file
LapTimerGPSRecDB.csv: recorded GPS fixes as universal CSV format
LapTimer-0003-20130601-121307.vbo: recorded GPS fixes prepared for Circuit Tools analytic tool

SOFTWARE
Product: Harry's LapTimer
Version: v17.0.6 Petrolhead Edition - Build: May 29 2013, 12:12:01
MD5: ec9cfec8eb6a9443d8bd0ef8130a2546

SYSTEM
Device: iPhone - Model: iPhone 4 (GSM)
OS: iPhone OS 6.1.3 - Databases: G65L64V65P64
Available memory: 3.9 GB - GPS: Internal
UDID: f6c3bfea5467ece152801d72403b64ab
Name: Bud

ONLINE CLIENT
DriverID: RAD - Simplified UDID: 1035374094

GPS DEVICE
XPGS 150A

Hi,

Checked the data. The two fixes making the plateau are 1.25 seconds apart, they are 99.1/99.2 respectively. My theory would be the speed between these two fixes did not change too much and LapTimer compression removed the "missing" four fixes. LapTimer's compression can be adjusted. It removes fixes not adding additional value because they can be recalculated by interpolation. This typically happens on straights. In case you do not want this compression, turn it off in LapTimer ‣ Settings.

GPSes are in general not very good in capturing short speed peeks. That might be another reason the plot shows a plateau.

There is certainly no limit to 100mph for the Dual XGPS or LapTimer's diagram view.

- Harry

Thanks for the response. I'll change the compression settings and try again.

I changed the GPS compression to 'None' and it looks like the plateaus are gone. The data also does not have any gaps anymore. Looks like that was it.