---
title: "SignalStrength"
description: "coverage, freshness at the tenth percentile, precision where truth is known, and independent corroboration"
section: concepts
address: /concepts/signalstrength
contract: 0476e35e6e275db5
---

# SignalStrength

coverage, freshness at the tenth percentile, precision where truth is known, and independent corroboration

[figure: SignalStrength is a view at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | view |
| scope | none |
| key | read and never stored as one number |
| store | derived |
| family | rules_engine |



## Fields


| field | type | required | note |
|---|---|---|---|
| `coverage` | `share` | no |  |
| `freshness_p10` | `duration` | no |  |
| `precision` | `share` | no | where truth is known |
| `corroboration` | `count` | yes |  |
| `population` | [PopulationStatement](/concepts/populationstatement) | yes |  |



## Routes that use it
- [`/v1/read/monitor_strength`](/reference/read/monitor_strength) returns it