ITRF & ICRF Explained: How Earth’s Motion Shapes Global Positioning Accuracy

Описание: Ever wondered how we measure Earth’s rotation, crust movement, and satellite positions with millimeter precision? 🌍 In this video, we explore the science behind the International Terrestrial Reference Frame (ITRF) and International Celestial Reference Frame (ICRF) — the backbone of modern geodesy, GNSS accuracy, and space navigation.

🛰️ What you'll learn:
Why WGS 84 isn’t enough for high-precision geodesy
How tectonic plate movement affects GNSS reference stations
What Earth Orientation Parameters (EOP) are and why they matter
How celestial bodies like quasars and pulsars anchor our reference frames
The role of GNSS, VLBI, SLR, and DORIS in defining ITRF
How satellite laser ranging (SLR) helps measure Earth’s geocenter
Differences between ITRF and WGS 84 — and why 1mm matters
Why ITRF 2020 is the future, but many still use ITRF 2014

📡 Whether you're a surveyor, geophysicist, GNSS engineer, or just curious about how we track Earth’s motion, this video gives you a complete overview of the systems that keep our positioning accurate — from satellites to space telescopes.

🎓 This video is part of the "GNSS & Geodesy Fundamentals" series on Offshore Surveys — your trusted resource for mastering satellite navigation, reference frames, and Earth science.

#ITRF2020 #ICRFExplained #GeodesyFundamentals #GNSSAccuracy #EarthRotation #SatelliteLaserRanging #VLBI #DORIS #WGS84vsITRF #OffshoreSurveys

If you are interested to know more about the subject please check out the References below. If you like the content, Please give me a Big Thumbs Up and perhaps Subscribe to my channel.

Reference :
https://www.fig.net/resources/publica...
https://www.iers.org/IERS/EN/Home/hom...
https://itrf.ign.fr/en/homepage
https://itrf.ign.fr/ftp/pub/itrf/itrf...
https://www.iag-aig.org/
https://confluence.qps.nl/qinsy/lates...
https://ggos.org/item/terrestrial-ref...
https://earth-info.nga.mil/
http://www.iausofa.org/2020_0721_C/so...