Monthly Archives: September 2017

The synergies between GNSS and Earth Observation

Synergies between GNSS and Earth Observation provide real-time information about the state of the Earth’s troposphereSpeaking at a dedicated session entitled “Applications: Earth Sciences and Geo-Information”, part of EUREF’s annual symposium, representatives of the mapping and surveying sector discussed the various synergies between GNSS and Earth Observation and their use for providing real-time information about the state of the Earth’s troposphere.

EUREF, the International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe, is dedicated to the definition, realisation and maintenance of the European Geodetic Reference Systems. Included in this mission is the development and maintenance of the EUREF GNSS Permanent Network (EPN), which is a ground-based GNSS infrastructure for scientific and practical applications in positioning and navigation. EUREF provides standards and guidelines to European National Mapping Authorities in order to harmonise the definition and adoption of national coordinate reference systems. Read more…

Interview with O. Montenbruck and P. Teunissen, editors of Handbook on GNSS

O. Montenbruck and P. TeunissenOliver Montenbruck (left picture), Head of the GNSS Technology and Navigation Group at DLR’s Space Operations Center and Peter Teunissen have edited an exhaustive reference work, the Springer Handbook of Global Navigation Satellite Systems, which brings together international experts to provide a state-of-the-art description of all facets of Global Navigation Satellite Systems.

Besides the obvious things, like navigation software in our cars and smart phones, which service or tools we use in our daily life, would not be possible without GNSS and would be deeply missed?
Peter Teunissen: GNSS radio occultation measurements provide important input for near-real-time weather forecast.
Oliver Montenbruck: Complex power grids and even stock exchanges would not work well without GNSS timing. Read more…

Two more satellites join Galileo service provision

Commissioning of two new Galileo satellitesThe European GNSS Agency (GSA), along with the European GNSS Service Centre (GSC), announce the commissioning of two additional satellites, bringing the total number of satellites available for the Galileo service provision to 18.

The GSA announced beginning of August the completion of in-orbit testing (IOT) of two new Galileo satellites, GSAT0212-SV ID 03- and GSAT0213-SV ID 04 -. Having passed all initial tests, the two satellites are now officially commissioned for operational use and are usable for the Galileo service provision (see NAGU 2017029 and NAGU 2017033). Read more…

Handbook on GNSS published by Springer

Springer Handbook of Global Navigation Satellite Systems

Springer Handbook of Global Navigation Satellite Systems

The Springer Handbook of Global Navigation Satellite Systems is now available.

Described as “A state-of-the-art description of GNSS as a key technology for science and society at large,” the 1,327-page tome is edited by Peter J.G. Teunissen and Oliver Montenbruck.

Teunissen is a professor of Geodesy and Satellite Navigation at Curtin University, Australia, and Delft University of Technology (TU Delft), the Netherlands.

Montenbruck is head of the GNSS Technology and Navigation Group at the DLR’s German Space Operations Center, Oberpfaffenhofen, and chair of the Multi-GNSS Working Group of the International GNSS Service. Read more…

Consortium records scintillation on Galileo signals in Antarctica

Septentrio PolaRx5

Septentrio PolaRx5

At the end of 2016, the DemoGRAPE consortium observed, for the first time ever, ionospheric scintillations on Galileo signals in Antarctica, using Septentrio’s PolaRx5S GNSS reference receiver.

DemoGRAPE investigates improvement of high-precision satellite positioning with a view to developing scientific and technological applications in Antarctica. At higher latitudes, GNSS signal degradation due to ionospheric activity is more pronounced.

The more precise phase-based positioning modes are particularly vulnerable to ionosphere disturbance such as scintillations. Elevated ionospheric activity can cause a loss of precise-positioning mode or, in more extreme cases, a total loss of signal lock. Read more…