Session Analysis Overlay

The Session Analysis Overlay provides a Circuit Tools-style interface for detailed telemetry analysis. It presents all your key data in a synchronized full-screen view, making it easy to correlate information across different visualizations.

How to access

1. Navigate to Track Days
2. Click on a track day to view its sessions
3. Click the View Analysis button on any session that has telemetry data

2x2 grid layout

The overlay uses an efficient 2x2 grid layout that puts all essential data in view at once:

+---------------------+---------------------+
|   Speed & Delta-T   |     Track Map       |
|      Charts         |   (GPS Overlay)     |
+---------------------+---------------------+
|     Lap Table       |  G-Force + Stats    |
|  (Select & Compare) |     Panels          |
+---------------------+---------------------+

• Top left -- Speed and delta time charts stacked vertically, plotted against track distance
• Top right -- Interactive GPS track map with speed-colored driving lines
• Bottom left -- Lap table for selecting and comparing laps
• Bottom right -- G-force friction circle plot and statistical panels

Synchronized cursor

All panels share a synchronized cursor position. When you hover or drag on any chart, every other panel updates to reflect the same point on track.

• Track map -- A white marker appears at the cursor position on the driving line
• Charts -- A vertical cursor line is displayed at the corresponding distance
• Live values -- Numeric readouts update to show data at the exact cursor point
• G-force plot -- The current lateral and longitudinal G values are highlighted

Interaction

• Hover on any chart to move the cursor
• Click on the track map to set the cursor to a specific location
• Drag on any chart to scrub through the lap continuously

G-Force friction circle

The friction circle (also called a G-G diagram) plots lateral G-force on the horizontal axis against longitudinal G-force on the vertical axis. This creates a visual representation of how you are using the available grip.

What to look for

• Trail braking technique -- Points that combine braking (negative longitudinal G) with cornering (lateral G) appear in the lower-left and lower-right quadrants. A smooth arc from braking into cornering indicates good trail braking.
• Maximum grip utilization -- Points near the outer edges of the circle mean you are using close to the maximum available grip. A smaller circle may indicate you are leaving grip on the table.
• Smoothness of inputs -- Scattered, erratic dots suggest abrupt inputs. A tight, consistent pattern indicates smooth driving.

Histogram reports

The overlay includes statistical histograms showing how you spend time at different levels across key channels:

• Speed distribution -- How much time is spent at each speed range
• Throttle position -- Time at various throttle openings
• G-force levels -- Distribution of lateral and longitudinal forces

These histograms help you understand your driving patterns at a high level. For example, a speed histogram that is heavily weighted toward lower speeds might indicate excessive caution in slow corners.