Discrepancy Between VRS (Company 1) and Base Station/Rover (Company 2) Hello All,   At the very beginning of a road project (streetscape project) that is essentially 1 mile long. Company 1 was asked to set control points for aerial UAV lidar that was goi...

ICYMI: Discrepancy Between VRS (Company 1) and Base Station/Rover (Company 2) #VRS #Geodesy #Lidar #UAV #Surveying

Topcon Legacy-E+ Firmware Hello,   i am looking for the latest (last) firmware release for the Topcon Legacy-E+ GNSS receiver. Is anyone able and willing to help me? It's not possible to get the latest releas...

Topcon Legacy-E+ Firmware #Topcon #GNSS #Geodesy #FirmwareUpdate #Receiver

17. Chapter 4: Introduction Chapter 4: Triangulation, limelight, human endurance and one of the “Ghosts” of Mountjoy, Thomas Drummond. How a hidden framework of measurement shaped the map of Ireland. Slieve Snaght…

Thank you, Professor Lilley. My next post, about the first triangulation behind the map of Ireland, is now online. Please see here: fromlimelighttosatellite.com/2026/04/03/1...

Read and subscribe to receive weekly posts.

#IrishHistory #Cartography #Surveying #Geodesy #SlieveSnaght #Donegal

Discrepancy Between VRS (Company 1) and Base Station/Rover (Company 2) Hello All,   At the very beginning of a road project (streetscape project) that is essentially 1 mile long. Company 1 was asked to set control points for aerial UAV lidar that was goi...

Discrepancy Between VRS (Company 1) and Base Station/Rover (Company 2) #GNSS #Geodesy #UAV #Lidar #Surveying

Get ready for #EGU26!
Join us to plan your GA week and meet your fellow geodesists.
Date and Time: 13th April, 14.00 CEST
Sign up here: buff.ly/axOXu6Z

#EGU #Geodesy #Networking

Last year's campaign had everything: a last-minute route reversal, a team member evacuated mid-trip, and a polar bear spotted just 1 km from the station.

Follow the full story in our latest blog post buff.ly/kE22ao8 by Christian Solgaard.
#Geodesy #EarthObseravtion #GNSS #EarthScience #Greenland

Adjustment Computations, Sixth Edition and GNSS Hello, I am looking for a text that will help me understand a least squares adjustment on a boundary survey and project control. There are not many people around here that survey with a tot...

ICYMI: Adjustment Computations, Sixth Edition and GNSS #Surveying #Geodesy #GNSS #BoundarySurvey #ProjectControl

📣#𝗘𝗨𝗥𝗘𝗙 𝗦𝘆𝗺𝗽𝗼𝘀𝗶𝘂𝗺 𝗹𝗮𝘁𝗲𝘀𝘁 𝗻𝗲𝘄𝘀

⚛️ Half-day tutorial session (Tuesday, June 23, morning) focused on quantum sensors
Preliminary program is available at euref2026.sciencesconf.org/resource/pag...

👉 euref2026.sciencesconf.org
#geodesy #refrenceframes #GNSS #EPN_CB

18th Geodesy Campfire 🔥
On Thursday, 16 April 2026 at 13:30 CEST, join us on Zoom for an exciting session with David Rodríguez Collantes and Klara Middendorf, covering topics from geophysical applications of GNSS to satellite gravimetry for studying hydrological extremes.
#EGU #Geodesy

What do you call this type of monument? Hello all, wondering if anyone knows exactly what this is. I have an old deed description that calls for pipes and I'm consistently finding this monument at the corners. I've seen these befo...

What do you call this type of monument? #Monument #Surveying #LandSurvey #DeedDescription #Geodesy

K index I see unusually high geomagnetic activity recently (). Does this actually affect the quality of GNSS? If over a certain value, say 5, should I avoid doing that work or are there steps I can...

ICYMI: K index #GNSS #GeomagneticActivity #KIndex #Geodesy #SatelliteNavigation

💭 Comparing large-scale hydrological models & satellite gravimetry (GRACE/GRACE-FO) with superconducting gravimeters is still challenging.

🔬 More gravimeters + better satellites/models → seamless water storage monitoring.

📄 EGU: meetingorganizer.copernicus.org/EGU26/EGU26-...

#Geodesy #EGU2026

OS benchmark cut on the rendered wall of a ruined building

Bah. Found this benchmark over the weekend and forgot to post it on #BenchmarkMonday ( #geodesy ). It is this one: www.bench-marks.org.uk/bm229665

K index I see unusually high geomagnetic activity recently (). Does this actually affect the quality of GNSS? If over a certain value, say 5, should I avoid doing that work or are there steps I can...

K index #GeomagneticActivity #GNSS #KIndex #Geodesy #SpaceWeather

Fuses in TDL 450 Cable I just bought a used TDL 450H, so i no longer have to rely on the internal radio in my R6-4. I had to order a cable for it and was surprised to see the fuse that came with it is 15 amps for ...

ICYMI: Fuses in TDL 450 Cable #TDL450 #Fuses #R6_4 #RadioEquipment #Geodesy

Interested in #geodesy? The TIGER Symposium will cover topics including Earth rotation and Earth tides, cryospheric and hydrologic deformation, volcano deformation, and seismogeodesy. It should be a great opportunity for collaboration. Abstract deadline April 15. Details in links below. ⚒️

Stake out with GNSS I started my own business 1.5 years ago after 30 years of working for others. As part of that, I purchased a GNSS base/rover system (Carlson Brx7) and I have really been putting it to great...

ICYMI: Stake out with GNSS #GNSS #Geodesy #Surveying #RoverSystem #Mapping

Fuses in TDL 450 Cable I just bought a used TDL 450H, so i no longer have to rely on the internal radio in my R6-4. I had to order a cable for it and was surprised to see the fuse that came with it is 15 amps for ...

Fuses in TDL 450 Cable #TDL450 #GNSS #Geodesy #Radio #Fuses

Have you signed up for our Campfire tomorrow?
#ShareYourResearch #Geodesy

[8/8] Aujourd’hui, la géodésie s’appuie sur les satellites pour mesurer la Terre avec une précision centimétrique. Cette longue histoire montre que la connaissance scientifique est collective, évolutive et liée aux enjeux politiques et économiques. #geography #geodesy #scientifichistory #earthshape

Déterminer la forme de la Terre : une aventure scientifique et politique entre la France et le Royaume-Uni Quelle est la forme exacte de la Terre ? Est-elle aplatie ou plutôt allongée aux pôles ? La question a agité les milieux scientifiques anglais et français pendant plusieurs siècles.

[1/8] Étienne Ghys, mathématicien au CNRS et à l’ENS de Lyon, retrace l’histoire de la mesure de la Terre. Il montre comment la détermination de sa forme mêle sciences, expéditions et rivalités politiques entre France et Royaume-Uni. #geography #geodesy #scientifichistory #earthshape

Stake out with GNSS I started my own business 1.5 years ago after 30 years of working for others. As part of that, I purchased a GNSS base/rover system (Carlson Brx7) and I have really been putting it to great...

Stake out with GNSS #GNSS #Geodesy #Surveying #RoverSystem #Stakeout

🚨 Final Call! 🎨

Only days left to join the #Geodesy #Cartoon #Competition! Turn #geodesy into art & win up to 900 € 🏆

💡 Team up or use AI tools — get creative!
🗓️ Deadline: Mar 22, 2026 Winners @ #IAG Geodesy Reception during #EGU26

👉 https://geodesy.science/cartoon/competition
#ScienceCommunica

Save the date for the 17th Geodesy Campfire🔥
On Thursday, 19 March 2026 at 14:00 CET, join us on Zoom for an exciting session with Hugo Lecomte and Marius Schlaak, covering topics from optical atomic clocks and geoid studies to satellite gravity products for climate applications.
#EGU #Geodesy

Photos of the expert panel members on the Expert Panel on Enhancing Canada's Geodetic Infrastructure.

We're pleased to announce our Expert Panel on Enhancing Canada’s Geodetic Infrastructure, chaired by Denis Hains. go.cca-reports.ca/4uitrzN

#Geodesy #Geodetic

La figure de la Terre: Un débat franco-anglais (XVIIe-XXIe siècle), an exhibition running at the Bibliothèque Mazarine in Paris from 1 April to 20 June 2026. This exhibition offers a historical and scientific journey through more… More

La figure de la Terre: Un débat franco-anglais (XVIIe-XXIe siècle), an exhibition running at the Bibliothèque Mazarine in Paris from 1 April to 20 June 2026. This exhibition offers a historical and scientific journey through more… More

NGS YXZ TO GEODETIC website is gone? My goto NGS YXZ TO GEODETIC converter seems to be MIA.     Just checking if others can no longer reach website from above.   Looks like I may have to start using NCAT. &...

ICYMI: NGS YXZ TO GEODETIC website is gone? #Geodesy #Surveying #GeographicInformationSystems #GIS #Mapping

IAG International Symposium on Reference Frames for Applications in Geosciences (REFAG2026) held from 2 to 4 March 2026 in Munich

#REFAG2026 was held 2–4 March in Munich🇩🇪

Great presentations and discussions!
• 200 participants
• advances in terrestrial🌍 and celestial #referenceframes, Earth orientation, and multi-technique #geodesy

#EarthScience

L1 phase center or average L1+L2 for Antenna Calibration? (CGO2/landstar8/igage) See actual question at the end. Unnecessary background info: I use CHCNav CGO2 for processing a static network (logging from cors sites & on-site bases). I use LandStar8 field software ...

ICYMI: L1 phase center or average L1+L2 for Antenna Calibration? (CGO2/landstar8/igage) #GNSS #Geodesy #AntennaCalibration #CHCNav #LandStar8

Bits and Bites of Geodesy – Satellite Gravimetry: Studying Earth’s water cycle from space During winter, mountains gain mass because of snow covering the peaks. In spring, the snow melts and flows downstream until it reaches the ocean or evaporates into the atmosphere to reach back on the…

Did you know that we can study Earth's water cycle by measuring its gravity field with satellites?

In our latest blog post, Kiana Karimi shares insights into this interesting application of GRACE and GRACE-FO. Read the article here: buff.ly/cbfMiF6

#EGU #Geodesy #Water #SatelliteGravimetry