> ## Documentation Index
> Fetch the complete documentation index at: https://offthepace.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# fct_telemetry_deltas

> Driver-vs-teammate corner-metric deltas.

<Note>Part of the [Marts](/transform/families/marts) family.</Note>

Driver-vs-teammate corner-metric deltas. Grain: one row per (race\_id, driver\_a, driver\_b, corner\_name, lap\_number) for each teammate pair (driver\_a \< driver\_b) within a race, the per-corner difference in braking point, minimum corner speed, and throttle-application point. Built by joining int\_corner\_metrics to itself across same-car teammates. Exported to the app's data bundle but has no current app feature consumer.

## Lineage

```mermaid theme={null}
flowchart LR
  int_corner_metrics --> fct_telemetry_deltas
  stg_laps --> fct_telemetry_deltas
  style fct_telemetry_deltas fill:#e40404,stroke:#e40404,color:#fff
```

## Overview

| Property          | Value                                                                            |
| ----------------- | -------------------------------------------------------------------------------- |
| Layer             | `marts`                                                                          |
| Family            | [Marts](/transform/families/marts)                                               |
| Contract enforced | No                                                                               |
| Upstream          | [`int_corner_metrics`](../int/int_corner_metrics), [`stg_laps`](../stg/stg_laps) |

**9 tests** [guard](/transform/ci/overview) this model  -  9 generic, 0 singular.

## Columns

| Column                   | Type | Nullable | Tests                                  | Description                                                                                          |
| ------------------------ | ---- | -------- | -------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| `race_id`                |      | Yes      | [`not_null`](/transform/ci/structural) | Race identifier.                                                                                     |
| `driver_a`               |      | Yes      | [`not_null`](/transform/ci/structural) | First driver of the teammate pair (lexicographically smaller id).                                    |
| `driver_b`               |      | Yes      | [`not_null`](/transform/ci/structural) | Second driver of the teammate pair.                                                                  |
| `corner_name`            |      | Yes      | [`not_null`](/transform/ci/structural) | Named track corner the delta is measured at.                                                         |
| `track_id`               |      | Yes      | [`not_null`](/transform/ci/structural) | Track identifier for the corner.                                                                     |
| `lap_number`             |      | Yes      | [`not_null`](/transform/ci/structural) | Lap number within the race.                                                                          |
| `braking_point_delta_m`  |      | Yes      | [`not_null`](/transform/ci/structural) | driver\_a − driver\_b braking point (metres). Positive = driver\_a brakes later.                     |
| `v_min_delta_kph`        |      | Yes      | [`not_null`](/transform/ci/structural) | driver\_a − driver\_b minimum corner speed (kph). Positive = driver\_a carries more speed.           |
| `throttle_point_delta_m` |      | Yes      | [`not_null`](/transform/ci/structural) | driver\_a − driver\_b throttle-application point (metres). Positive = driver\_a gets on power later. |