Emlid RCH203 Reach RS2 Multi-band RTK GNSS Receiver

Emlid Reach RS2 is an affordable Multi-band RTK GNSS receiver (GNSS / GPS RTK Rover) which uses an app as a controller. In this case, it is designed for precise surverying, mapping and data collection with cm accuracy.

Emlid RCH203 Reach RS2 Multi-band RTK GNSS Receiver Features:
Multi-band GNSS covering GPS / QZSS L1 L2, GLONASS G1 G2, Beidou B1 B2 and Galileo E1 E5
Collect Survey Points
Use as Base Station for Surveying/Data Collection
Receive Corrections Data via the Internet
Long Range Radio (LoRa)
Machinery Guidance
CM Accuracy in RTK Mode (Reach RS2 Survey Kit RCH203-KIT Required)
Reachview App
Gets Fix in Seconds
Centimeter Accuracy
RTK over 60km
PPK over 100km
Built in 3.5G Modem, in this case a power-efficient 3.5G HSPA modem with 2G fallback and global coverage
PPP Support, RINEX raw data logs are compatible with PPP services as a result centimeter-precise results are available anywhere on Earth

Products included in Emlid RCH203 RTK GNSS Receiver Package:
Reach RS2
Carry case with a strap
Radio antenna
USB Type-C cable

Centimeter Accuracy with the Reach RS2

The Emlid Reach RS2 needs access to corrections for centimeter accuracy. Obtained over the Internet (NTRIP) or a local base station can be used.

NTRIP Corrections

NTRIP (Networked Transport of RTCM via Internet Protocol) allows a GNSS / GPS RTK rover (client) to communicate with a base station (caster) over the internet to achieve cm level accuracy.

Base Stations
A base station is a unitset to a known latitude, longitude and height. This is referred to as a ‘known’ point. This base will keep monitoring the satellites above and will calculate position corrections and send them to the GNSS / GPS Rover.

An Emlid Reach RS2 is suitable for use as a base station. They are capable of transmitting corrections locally or over the internet. If set up locally, all recorded positions will be relative to the position of the Base Station.

Baseline
Whether using NTRIP or a RS2 sending corrections over the internet. It is important to note the baseline. The baseline is the term given to the distance between the base station and the GNSS RTK Rover (Reach RS2). The baseline is important, because the atmospheric conditions will be different at different locations. Therefore there will be less accuracy the further the rover gets from the base.