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

# ResQ.Core.Velocity

### [ResQ.Core](./ResQ.Core.md "ResQ.Core")

## Velocity Class

Represents a velocity vector in NED (North-East-Down) coordinate frame.

```csharp theme={null}
public record Velocity : System.IEquatable<ResQ.Core.Velocity>
```

Inheritance [System.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object "System.Object") → Velocity

Implements [System.IEquatable\<](https://learn.microsoft.com/en-us/dotnet/api/system.iequatable-1 "System.IEquatable`1")[Velocity](./ResQ.Core.Velocity.md "ResQ.Core.Velocity")[>](https://learn.microsoft.com/en-us/dotnet/api/system.iequatable-1 "System.IEquatable`1")

### Example

```csharp theme={null}
// Drone moving North at 10 m/s, East at 5 m/s, and climbing at 2 m/s
var velocity = new Velocity(10.0, 5.0, -2.0);

// Calculate ground speed (ignoring altitude change)
double groundSpeed = Math.Sqrt(velocity.Vx * velocity.Vx + velocity.Vy * velocity.Vy);
```

### Remarks

The NED frame is a local tangent plane coordinate system commonly used in aviation
and robotics. Positive X is North, positive Y is East, and positive Z is Down.

| Constructors                                                                                                                                       |                                                                         |
| :------------------------------------------------------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------- |
| [Velocity(double, double, double)](./ResQ.Core.Velocity.Velocity\(double,double,double\).md "ResQ.Core.Velocity.Velocity(double, double, double)") | Represents a velocity vector in NED (North-East-Down) coordinate frame. |

| Properties                                               |                                                                          |
| :------------------------------------------------------- | :----------------------------------------------------------------------- |
| [Vx](./ResQ.Core.Velocity.Vx.md "ResQ.Core.Velocity.Vx") | Velocity in North direction (m/s). Positive is North, negative is South. |
| [Vy](./ResQ.Core.Velocity.Vy.md "ResQ.Core.Velocity.Vy") | Velocity in East direction (m/s). Positive is East, negative is West.    |
| [Vz](./ResQ.Core.Velocity.Vz.md "ResQ.Core.Velocity.Vz") | Velocity in Down direction (m/s). Positive is Down, negative is Up.      |