GNSS Hotspots | January 2013
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1. TIMING IS EVERYTHING
Washington, D.C.
1. TIMING IS EVERYTHING
Washington, D.C.
GNSS is in a class of its own and the positioning/navigation/timing (PNT) technology of choice for most applications. Why wouldn’t we always use it?
It is affordable, it is a mature technology with many form factors, and its level of performance spans several orders of magnitude — millimeters to meters. There are a bewildering number of permutations of user equipment, augmentation solutions, processing algorithms, and operational procedures to choose from.
However. . . .
By Inside GNSSWorking Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
By Inside GNSSQ: What will limit the spread of multi-frequency GNSS receivers into the mass market?
A: To set the scene, we need to define our terms of reference. By multi-frequency we mean receivers that operate with navigation signals in more than just the standard upper L-band from about 1560–1610 MHz where we find GPS L1, Galileo E1, Compass B1, and GLONASS L1. The obvious additional frequency is the lower L-band, from about 1170 to 1300 MHz, where again the same four constellations have signals.
By Inside GNSSThe whole GNSS world should have a warm spot in its heart for centripetal forces.
After all, a centripetal force — in this case, gravity — is what keeps planets in rotation around our Sun and satellites, around the Earth.
Centrifugal force, of course, is what throws us off a merry-go-round or carousel. Centripetal force is what keeps us on board.
For those on a merry-go-round, the centripetal force is not gravity, but rather the tensile strength of our arms pulling us toward the center of rotation, at right angles to the motion of our seats.
By Inside GNSSGalileo promoters have always tended to try to link the program to new jobs and economic growth, arguing that once Europe’s global satnav system is up and running, new services will be possible and opportunities for EU companies will abound.
Such arguments needed to be made, to bolster the chronically tenuous political support Galileo has garnered from the European Union (EU) powers-that-be and the chronic lack of faith among just about everybody in Europe’s ability to actually make the system fly.
By Peter GutierrezNavigation users may benefit from GPS modernization sooner than expected thanks to an apparent shift in the schedule of the modernized GPS ground control segment still under development.
The change means that full operational implementation of the new signals will come earlier in the delayed modernization of the operational control Segment (OCS).
By Dee Ann DivisThe world’s four GNSS programs aren’t exactly a classical quartet, weaving Mozart stanzas in disciplined execution.
By Inside GNSSThe Air Force Research Laboratory (AFRL) has selected Surrey Satellite Technology US LLC (SST-US), of Englewood, Colorado, to investigate cost reduction and augmentation of the current GPS constellation through the application of a small satellite approach.
AFRL has contracted with SST-US to identify and analyze how small satellites can improve aspects of GPS system performance, such as accuracy, coverage, and robustness at costs far below those of past procurements.
By Inside GNSSThe 20th St. Petersburg International Conference on Integrated Navigation Systems (МКИНС2013) will take place at Elektrobribor company, the Russian Federation State Research Center, on May 27-29, 2013.
Conference topics will cover civil uses and aspects of:
By Inside GNSSThe 2013 European Geosciences Union General Assembly and exhibition will take place in the Austria Center Vienna (ACV) from April 7 through April 12.
The event attracts more than 11,000 geoscientists from all over the world. The official language is English. The early registration deadline is March 13. The program will be available after March 25.
By Inside GNSSThe 2013 Geospatial World Forum and industry exhibition will be held at the Beurs – World Trade Center in the international port city of Rotterdam on May 13-16.
This year’s theme is "Monetizing Geospatial Value and Practices." The keynote speakers are Chris Gibson, vice president of Trimble and Mark Reichardt, president and CEO of the Open Geospatial Consortium (OGC).
By Inside GNSSThis five-day workshop is one of several sponsored by the Office for Outer Space Affairs of the United Nations in various European countries. The workshops will give participants an overview of GNSS systems and applications with the aim of strengthening a network of national reference stations and promoting the interoperability of navigation, positioning and timing systems in the region.
The UN/Croatia workshop will take place on Baška, Krk Island on April 21-25, 2013.
It is free.