![Device Sensor](https://nextnav.com/wp-content/uploads/2023/04/sensor2.png)
Device Sensor
Tiny sensors in your device measure environmental conditions.
![Device sends reading. NextNav altitude station data.](https://nextnav.com/wp-content/themes/nn/assets/images/pinnacle/how-step-portrait-1.png?v=2024-07-23)
![NextNav Cloud](https://nextnav.com/wp-content/uploads/2023/04/Data-Center.jpg)
NextNav Cloud
The Pinnacle service compares device data to local conditions, subtracting the weather and other factors to leave behind a highly accurate altitude measurement.
![NextNav Cloud sends altitude.](https://nextnav.com/wp-content/themes/nn/assets/images/pinnacle/how-step-portrait-2.png?v=2024-07-23)
![NextNav Altitude Stations](https://nextnav.com/wp-content/uploads/2023/02/how-it-works-graphic-circle-1-for-website.png)
NextNav Altitude Stations
These stations create a hyperlocal model of environmental conditions.