How RTK Error Corrections Work

• Behind the scenes, RTK relies on a network of GNSS satellites that transmit signals to both the base station and the mobile receiver. The base station, positioned at a stable, fixed location with visibility to satellite constellations and within radio range of the rover, continuously calculates the discrepancies between its precise coordinates and the coordinates obtained from GNSS signals. These discrepancies, or errors, include factors such as 𝘀𝗮𝘁𝗲𝗹𝗹𝗶𝘁𝗲 𝗼𝗿𝗯𝗶𝘁 𝗲𝗿𝗿𝗼𝗿𝘀, 𝗮𝘁𝗺𝗼𝘀𝗽𝗵𝗲𝗿𝗶𝗰 𝗱𝗲𝗹𝗮𝘆𝘀, 𝗮𝗻𝗱 𝗺𝘂𝗹𝘁𝗶𝗽𝗮𝘁𝗵 𝗲𝗳𝗳𝗲𝗰𝘁𝘀, which occur when signals reflect off surfaces before reaching the receiver. • The base station sends real-time correction data to the mobile receiver, which applies these corrections to its own measurements. This process involves several key steps: 𝟭. 𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁𝗶𝗮𝗹 𝗖𝗼𝗿𝗿𝗲𝗰𝘁𝗶𝗼𝗻𝘀 – The base station calculates the difference between the observed GNSS measurements and the true position, generating differential corrections. 𝟮. 𝗥𝗲𝗮𝗹-𝗧𝗶𝗺𝗲 𝗧𝗿𝗮𝗻𝘀𝗺𝗶𝘀𝘀𝗶𝗼𝗻 – These corrections are transmitted to the mobile receiver via radio signals, enabling immediate adjustments. 𝟯. 𝗣𝗼𝘀𝗶𝘁𝗶𝗼𝗻 𝗥𝗲𝗳𝗶𝗻𝗲𝗺𝗲𝗻𝘁 – The mobile receiver applies the corrections to refine its position estimates, resulting in highly accurate coordinates. • To maintain optimal performance, it is crucial that the error in RTK positioning remains minimal—typically within a few centimeters. If the error exceeds this acceptable range, adjustments or recalibrations may be necessary to ensure measurement accuracy. Also Check: ▪️"𝗥𝗧𝗞 𝗣𝗼𝘀𝗶𝘁𝗶𝗼𝗻𝗶𝗻𝗴 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱" ----https://lnkd.in/d9K2bxsC ▪️"𝗥𝗧𝗞 🆚 𝗣𝗣𝗞" ----https://lnkd.in/d9rWPcgK 🔻𝗦𝗵𝗮𝗿𝗲 𝘆𝗼𝘂𝗿 𝗽𝗲𝗿𝘀𝗽𝗲𝗰𝘁𝗶𝘃𝗲 👇🏾 🔻Follow 👉🏾: Gensre Engineering & Research Video Credit 🎥: Geospatial World & SatLab