JPL uses GPS to find Sierra Nevada water weight; Near collision of drone and regional jet prompts questions, West Antarctic ice sheet melt at “point of no return,” First Galileo FOC satellites at launch site, China’s GBAS tested in Tianjin
By Inside GNSSWell, I could have taken up the subject of the deteriorating condition of U.S./Soviet, excuse me, U.S./Russian relations. But there are only so many windmills that I have time to tilt at.
So, rather than tracing the dissolution of bilateral GNSS cooperation in the wake of Russia’s reclaiming the Crimea and, who knows, perhaps eventually a large swath of eastern Ukraine, I thought I’d turn to an only slightly more remediable issue — GNSS carriage requirements.
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: How do you compute a relative position using GNSS?
A: In many applications the absolute position of an object is less important than the relative position to other objects in the vicinity. An obvious example is a collision avoidance system, wherein the proximity of nearly vehicles is much more important than whether the vehicles are located on street “X” or “Y.”
By Inside GNSSSIDEBAR: Michel Monnerat’s Compass Points
“I was born in Arles, in the south of France,” says Michel Monnerat, “but I left France before my first birthday. We moved many times, from place to place.”
Monnerat’s father worked for a civil engineering company, specializing in maritime works — harbor construction, coastal protection, and such. His family lived in Ivory Coast, Cameroon, and Tunisia, but Monnerat spent most of my early life in Lomé, the capital city of Togo.
By Inside GNSSEurope has been talking up its European Geostationary Navigation Overlay Service (EGNOS, for short) — and why shouldn’t it? Talking about Galileo doesn’t get satellites off the ground. EGNOS, on the other hand, is up and running, and has been since 2009. If the object is to build confidence in European savoir faire, why not talk about a real success like EGNOS?
By Peter GutierrezA shift in the Air Force’s acquisition plan should shave a year off the time needed to finish development of new M-code–equipped receivers and potentially inspire more commercially flavored innovation — and perhaps even the entry of new vendors.
The new approach enables the Pentagon to fulfill a congressional mandate to buy only M-code receivers after fiscal year 2017 and could help convince the user community, jaded by previous delays, to speed adoption of the more resilient devices.
By Dee Ann DivisDon’t be misled by the title. This is not another round of speculation about who should be proclaimed the rightful “Father of GPS.”
By Inside GNSSWith the optimism of college-bound seniors touring the Ivy League, GPS managers have been weighing options to dramatically change the GPS constellation. Now, after studying the costs, considering the benefits, and assessing the funding climate, officials have made the starkly fiscal decision to stick close to home and take a few extra years to finish.
By Dee Ann DivisWorking 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 GNSS1. E-CROWDSHIPPING
Palo Alto, California USA