Global Navigation Satellite Systems Engineering, Policy, and Design
The EU’s Galileo program posted an official notice on 11 July advising users that Galileo service is degraded on all satellites until further notice.
By Inside GNSS
Our source inside the European GNSS Agency (GSA), which is the EU agency responsible for Galileo services, has told us: “They are working on it. Teams from industry and the Agencies are working 24/7 to restore the Galileo services as soon as possible to their nominal levels. The current estimation is that the services should be restored within 48 hours. In any case, we expect the service to be again nominal before the end of the weekend [13-14 July 2019],” the source said.
By Inside GNSS
At an event in the U.S. Capitol last week Senators Ted Cruz (R-TX) and Ed Markey (D-MA) discussed the importance of GPS to America and the need for a backup system when signals are not available.
By Inside GNSS
Entry-Level Antenna Provides Robust Position Accuracy and Reliability
NovAtel unveiled the new SMART2™ family of antennas today, adding robust entry-level options to their SMART Antenna portfolio that meets the needs of users requiring scalable accuracy in a single compact enclosure.
By Inside GNSS
KENNEDY SPACE CENTER, FLORIDA — NASA is poised to demonstrate an advanced atomic clock that could someday markedly improve satellite navigation.
By Dee Ann Divis
UPDATE: A week after this story appeared the news broke that Fred Kennedy had quit as the head of the Air Force’s new Space Development Agency after just four months on the job. News reports suggested that issues with his boss, Undersecretary of Defense for Research and Engineering Mike Griffin, were at the heart of the resignation. — Dee Ann Divis
The director of the Department of Defense’s new Space Development Agency (SDA) said Friday that one of his priority projects is to create an alternate GPS capability using frequencies different from those of the current constellation.
By Dee Ann Divis
Novel protection level formulas, combining RAIM with solution separation and Precise Point Positioning, are applied to static, automotive, and flight scenarios. The authors of this article demonstrate that protection levels below 2 meters are achieved with reduced computational loads.
Passengers stranded at airports is not an uncommon occurrence, but when weather does not appear to be an issue, anxious travelers can get restless searching for answers.
Over the last day or two, a number of U.S. flights were canceled as aircraft were grounded and passengers were left scratching their heads.
By Stan Goff
With the rethinking of the Galileo Commercial Service (CS), the E6B signal will disseminate Precise Point Positioning (PPP) corrections whereas the E6C component will be encrypted for authentication purposes. Different processing options for the E6 signals are investigated and it is shown that the sensitivity gap between data and pilot processing can be bridged by introducing non-coherent integrations and inter-frequency aiding. Extended integrations mitigate the impact of noise while inter-frequency aiding reduces the dynamics perceived by the E6B tracking loop.
By Daniele Borio and Melania Susi
The House Appropriations Committee approved all but $10 million of the $1.758 billion requested by the White House for the GPS program.
By Dee Ann Divis
Curtis Hay is a Technical Fellow at General Motors, where he develops precise GNSS and map technology for safe and reliable autonomous and semi-autonomous vehicles. He has appeared on many international stages, but while he very much enjoys traveling and meeting people in faraway lands, both for work and for pleasure, he knows where home is.
By Peter Gutierrez
Hostile cyber operations such as jamming and spoofing of GNSS signals are a growing concern. While they do not cause major damages to the satellite navigation system as such, they can have severe effects on critical national infrastructures and many other systems. Here, we address how international telecommunications law as well as the international law on the prevention of war apply in this context.
By Ingo Baumann
Improvements to GPS performance are often incremental, achieved by squeezing better performance out of existing systems with clever tweaks, smarter analysis and sharper receivers. Then again, every once in a while, there’s a huge leap in the capabilities of the system itself—an advance so big that it makes you appreciate all over again the elegant wizardry of satellite navigation.
By Dee Ann Divis
