Terminology

This section explains some of the key terms used throughout the Kurloo app and documentation to ensure clarity and consistency for all users.

Kurloo Nest

The cloud platform where data from Kurloo devices is processed, visualised, and managed in a professional and easy-to-use fashion. Kurloo Nest provides access to displacement monitoring, device management, and project-level reporting and alerting.

Project

A group of monitoring sensors organised within the app and Kurloo Nest, typically aligned to a site, or campaign.

Sensor

Refers to the monitoring point where a physical Kurloo device is installed at a site. A sensor includes not only the device but also its assigned location, installation details, and movement history.

Device

Refers specifically to the physical Kurloo hardware that collects displacement and environmental data at a monitoring site.

Relative Displacement

The measured movement of a sensor relative to its reference position over time, typically shown as changes in East (dE), North (dN), and Height (dH) directions.

Moving Average

A technique that smooths out short-term fluctuations in displacement data by averaging a set number of readings, making long-term trends easier to identify.

RSRP (Reference Signal Received Power)

A key measure of mobile network signal strength used by LTE-M devices.

• Strong signal: Better than -90 dBm
• Weak signal: Between -90 dBm and -110 dBm

RSRQ (Reference Signal Received Quality)

A measure of signal quality relative to noise and interference, important for evaluating mobile communication reliability.

SNR (Signal-to-Noise Ratio)

Indicates the clarity of the satellite signal received by the GNSS system. Higher values suggest better signal quality.

Wi-Fi RSSI (Received Signal Strength Indicator)

Measures the strength of a Wi-Fi connection, used for Kurloo devices operating on Wi-Fi networks.

GNSS (Global Navigation Satellite System)

A collective term for satellite positioning systems, including GPS, GLONASS, ## Galileo, and BeiDou, used by Kurloo devices to determine their position.

Antenna Reference Point (ARP) Height

The ARP Height is the vertical distance from the ground to the bottom of the device's reference point (the base of the reference plate when installed). This is the fundamental measurement point for geodetic calculations and provides a consistent reference for all positioning data.

Antenna Phase Centre (APC) Height

The APC Height is the vertical distance from the ground to the actual GNSS antenna phase centre - the electrical point where satellite signals are received and positioning measurements are made. This is calculated by adding the phase centre offset to the ARP Height.

Antenna Phase Centre Offset

The fixed vertical distance between the Antenna Reference Point and the Antenna Phase Centre. This offset varies by device type:

• Reference units : 173.9mm
• Standard units: 176.9mm