Viewing your runs
Once you have paired your Garmin account and have some files available on our server, you can view your runs. If needed, you can refer to the screenshots in Layout and Account Setup.
- On the Analysis page press the Open File Menu (three horizontal bars) icon.
- If you have runs available, they will be displayed in the table.
- Select all the runs you would like to view using the checkboxes on the left.
- Press the View button on the top right.
- After a couple of seconds, all runs will be opened and displayed.
- By default, the Summary tab will be displayed which contains a table with information about all currently viewed runs, and charts may be viewed by pressing the corresponding tabs at the top.
- You can view individual runs by selecting them from the list view on the left hand side.
Note: You can use the Group by Sessions slider to display runs based on session. You can also open all runs belonging to a session directly from the Sessions tab in the file menu.
Run analysis
There are a few steps to getting the best accuracy from your data.
Select valid runs
Aeroportal will automatically mark laps as valid based on the speed tolerance criteria by selecting the checkbox in the valid column in the Laps summary table.
- The Laps summary table can be found by clicking on a run in the list view on the left, and clicking on the Laps tab at the top.
- Under the Valid column, you can select/deselect laps to be marked as valid.
- Once you are happy with your selection, press the Save Laps & Recalc button, to save your lap selection to our server and recalculate the run. This will also update information in the Summary for all viewed runs. Note: Next time you open this run in the aeroportal, it will be loaded with your valid lap configuration.
Note: If you would like to reset a runs valid laps to its defaults, you can press the Reset Valid Laps button.
A few tips on selecting laps:
- For Out-back runs, you need an even number of laps. You should be able to see the out and back pairs.
- Check the Distance column to make sure the lap looks correct.
- Check the Power column to check you aren’t on a warmup or cooldown lap.
- Look at the CdA column to make sure the CdA looks stable. Sometimes in the velodrome the first and last laps can be outliers because getting into or out of position on the bike.
Check if auto cal is appropriate.
Decide if using auto cal is appropriate or not. We will shortly be adding more guidance on this.
You can set whether to use auto cal for this specific run by selecting true or false under Auto cal by following the guidance in the section Editing Data and Run Setup.
Check run parameters
The run parameters entered into the Garmin via the CIQ are shown under Run parameters section of the Summary tab of an open run. “Default” marks the Setting in device and also copied to “Used” for calibration when first loaded.
If any of these were not correct, or for example you are not using Auto Cal and want to manually change the Aero Cal value then you can set it by following the instructions in “Editing a single run”.
Recalculate
When changing values such as Run Metrics, Auto Cal, Test Type etc, you can open the file menu, check that the runs you want to view are selected, and press View again. This will recalculate the files with your saved values, update individual runs and also update the Summary tab.
Interpreting data
In the summary tab you see a list of all of your viewed runs. The final, calibrated CdA is in the column under “CdA Final”.
In the very first column you can select your baseline. This is usually the first of a block of runs, and is the run you want to compare everything else to.
Under the column grouping “Delta to baseline” you see the difference between each run and the baseline. This is the most important section.
- CdA shows the difference between each run and the baseline in terms of pure CdA.
- Watts shows this difference in terms of power. Since power is a function of speed, you need to select an appropriate speed to calculate the power at.
Aerodynamic power, the power expended purely on aerodynamic drag, can be calculated as follows. This assumes zero headwind.
p_{aero} = \frac{1}{2} \rho v^3
Where:
p_{aero} = Aerodynamic power (Watts)
\rho = Air density (kg/m3), typically around 1.2
v = Speed (m/sec)
Histograms
On each run in the main list of runs to the left, histograms of headwind and wind yaw angle are shown for all of the laps marked as valid, under the Charts tab on the top.
For each headwind bucket it shows the percentage of time spent with that level of headwind.
If aero calibration is correct, it should be centred around zero.
For each yaw angle bucket it shows the percentage of time spent with that wind yaw angle.
This is Abs Yaw where negative values are treated as positive as generally we assume the aerodynamics are symmetric, so you just want to see what variation is.
Here, by bucket we mean a headwind or yaw angle range.
For example, each headwind bar is 2kph wide, so the bar at 4kph counts all of the datapoints where the headwind falls between 3 and 5kph.
