Understanding hot, cold, and warm starts in GNSS receivers is key to optimizing startup time and performance. Learn how each mode works, why ephemeris data is crucial, and how power backup solutions impact startup efficiency.

ELT_RTKBase is a stationary GNSS base station built on multi-constellation, multi-frequency receivers such as the Unicore UM980, Bynav M20 or Septentrio mosaic-X5. It offers advanced connectivity options over the internet or local networks. The package includes detailed documentation, making it user-friendly even for beginners.

CORS stands for “Continuously Operating Reference Station”. So when we talk about CORS, we mean a stationary GNSS base station with an antenna installed on a roof. When we say GNSS base station without context, we usually refer to a portable surveying GNSS base—a receiver with an antenna.

ELT_RTKBase is a high-performance GNSS base station designed for precise positioning. It features two NTRIP v1 servers that can also function as TCP clients, making it a flexible solution for RTK applications. The device comes with detailed documentation, including step-by-step screenshots, ensuring easy setup even for beginners.

The first step is to decide whether you need advanced (wired) GNSS base station or a budget (wireless) GNSS base station. If you need Ethernet, PoE, or 5GHz WiFi, choose a wired base station. If 2.4GHz WiFi is sufficient, a budget station will do.

Raspberry Pi 4B, supports Ethernet, dual-band WiFi (2.4GHz and 5GHz), and can be powered via USB or PoE, with rack-mounting capability. The budget station, built on Raspberry Pi ZERO 2W, uses only 2.4GHz WiFi, is USB-powered, and doubles as a GNSS receiver with an NTRIP LED and USB output. 

The base stations differ in GNSS receivers. Unicore UM980 is an entry-level survey-grade receiver, offering good signal quality and wide compatibility. Bynav M20 is simpler, less feature-rich, and not survey-grade, suitable for basic tasks like GNSS mining. Septentrio Mosaic X5 provides advanced features like spoofing protection and regional optimization, ideal for professional geodetic work.

Choosing the right GNSS antenna depends on your needs. The ANN-MB2 is an affordable option for basic use. For professional surveying, harsh climates, high accuracy, or multipath suppression, consider alternatives like the Choke Ring, Survey 160 mm, MultiPatch  or Quad Helix.

The setup of the base station begins with selecting the connection method: via Ethernet, WiFi with WPS, or without it. Properly connecting the equipment before powering it on is crucial. Turning on the station, configuring WiFi, troubleshooting issues, and completing final steps will help finalize the installation. Additional configurations are available for earning with Onocoy or connecting to other NTRIP casters.

This section covers essential safety precautions during hardware setup, including antenna installation, SD card insertion, and differences between base station types. Follow these guidelines to avoid damage and ensure stable device operation.

This section covers Wi-Fi setup using WPS PBC for the ELT_RTKBase base station. Starting from version 1.7.8, the device supports Wi-Fi Protected Setup (WPS), allowing for quick network connection by pressing the WPS button on both the router and the device. In version 1.7.9, WPS activates only if there is no existing network connection. 

This section explains the LED indicators on advanced (wired) and budget (wireless) base stations. The purple LED shows power status, while the green LED indicates satellite reception—its behavior varies by model. The yellow LED signals internet connectivity, blinking during WPS mode, and the red LED confirms a successful NTRIP caster connection.