Results 11 to 20 of about 71,235 (270)

Friedrich Robert Helmert, founder of modern geodesy, on the occasion of the centenary of his death [PDF]

open access: yesHistory of Geo- and Space Sciences, 2017
Friedrich Robert Helmert died in Potsdam in 1917 at the age of 74 after serving for over 30 years as director of the Royal Prussian Geodetic Institute and of the Central Bureau of the Internationale Erdmessung, the forerunner of today's International ...
J. Ihde, A. Reinhold
doaj   +1 more source

Overview on the scientific and academic contribution of prof Risto RIBAROSKI with emphasis on his publications [PDF]

open access: yesMicro, Macro & Mezzo Geoinformation, 2021
Prof. Ribaroski has abundant, versatile and significant opus. While he was one of the few in geodesy professors in Macedonia, teaching many generations of students in geodesy and other subjects in geodetic-civil engineering fields, he was also able to ...
Bashkim IDRIZI
doaj  

An influence of the covariance between single orbit parameters on the accuracy of observations of the pseudo-ranges and phase differences

open access: yesMetrology and Measurement Systems, 2020
The possibilities to improve values of the satellite orbit elements by employing the pseudo-ranges and differences of carrier phase frequencies measured at many reference GPS stations are analysed. An improvement of orbit ephemeris is achieved by solving
Skeivalas Jonas   +3 more
doaj   +1 more source

Investigation of the Thiva 2020–2021 Earthquake Sequence Using Seismological Data and Space Techniques

open access: yesApplied Sciences, 2022
We investigate an earthquake sequence involving an Mw = 4.6 mainshock on 2 December 2020, followed by a seismic swarm in July–October 2021 near Thiva, Central Greece, to identify the activated structures and understand its triggering mechanisms. For this
George Kaviris   +14 more
doaj   +1 more source

Optomechanical Accelerometers for Geodesy

open access: yesRemote Sensing, 2022
We present a novel optomechanical inertial sensor for low-frequency applications and corresponding acceleration measurements. This sensor has a resonant frequency of 4.715 (1) Hz, a mechanical quality factor of 4.76(3) × 105, a test mass of 2.6 g, and a projected noise floor of approximately 5 × 10−11 ms−2/Hz at 1 Hz.
Adam Hines   +6 more
openaire   +3 more sources

The usage of geospatial tools in traffic sign detection [PDF]

open access: yesZbornik radova Departmana za geografiju, turizam i hotelijerstvo, 2023
The topic of this scientific paper is the detection of traffic signs based on the data obtained using modern geodetic methods (LiDAR, mobile laser scanning), by using geospatial tools.
Nikolić Natalija   +2 more
doaj   +1 more source

Atomic clocks for geodesy [PDF]

open access: yesReports on Progress in Physics, 2018
73 pages, 22 ...
Heiner Denker   +5 more
openaire   +4 more sources

Study of karst manifestations in Solotvyno based on aerial photography from a UAV

open access: yesReports on Geodesy and Geoinformatics, 2023
This article is devoted to the study of surface karst manifestations on the territory of inactive salt mines of Solotvyno, Transcarpathian region, Ukraine. The historical development of the salt mine from the moment of the creation of the first mine (the
Hlotov Volodymyr   +4 more
doaj   +1 more source

Seismology and geodesy of the sun: Solar geodesy [PDF]

open access: yesProceedings of the National Academy of Sciences, 1981
Measurements of the elliptical figure of the sun made in 1966 are analyzed on an hourly basis. This analysis yields an improved measure of the previously found solar distortion, rotating rigidly with a sidereal period of 12.38±0.10 days. It also yields a set of residùals used to search for signals due to low-frequency solar oscillations.
openaire   +3 more sources

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