Global Navigation Satellite Systems Engineering, Policy, and Design
With experience in satellite procurement, user equipment development and working with Congress, Col. Steven Whitney may be just the chief the GPS Directorate needs.
By Inside GNSS
Unicore UR380 GNSS Receiver with UB380Unicore released UB380 GPS/GLONASSS/BDS high precision board at ION GNSS+ 2015, held this week in Tampa, Florida.
UB380 is a 384-channel, multi-GNSS receiver that supports GPS, GLONASS, and the BeiDou Satellite System (BDS) based on Unicore’s multi-GNSS system on a chip. The receiver board can support GPS L1, L2, and L5; GLONASS L1, L2; and BDS B1, B2 and B3.
By Inside GNSS
With a successful September 10/11 launch under its belt, the Galileo program continues to move in the right direction, but proponents should be cautious about overstating the rate of progress, lest too-hopeful forecasts come back to bite them (again).
The September 11 European Space Agency (ESA) press release featured a headline proclaiming that 10 Galileo satellites are now in orbit, and while technically that may be true, it bears considering whether the 10 satellites in question are all they’re cracked up to be.
By Inside GNSS
"Precise Point Positioning, Part 2: A Deeper Dive" took place on April
14. Dr. Sanjeev Gunawardena, from the Air Force Institute of Technology,
and
Dr. Sunil Bisnath, of York University, led the discussion.
It was the second of two webinars on high-accuracy GNSS techniques of
real-time kinematic (RTK) and precise point positioning (PPP).
You can still register for free, on-demand viewing of a recorded version of the live event:
By Inside GNSS
A new federal watchdog report released yesterday (September 9, 2015) questions the outlook for the still-developing GPS ground control system saying the Pentagon may not fully understand the true cause of ongoing problems in a program where further delays “may likely pose significant risks to sustaining the GPS constellation and delivering GPS capability.”
By Inside GNSS
At one time, GPS was expected to supplant a wide range of navigation technologies in the world’s positioning, navigation, and timing (PNT) portfolio. But an unexpected thing happened along the way.
By Inside GNSS
Figures and TablesThe current stage of GLONASS evolution is aimed at meeting future user requirements of which the most important is the improved accuracy of positioning.
During the implementation of the GLONASS Space Segment Modernization Program (2012–2015), the GLONASS team is facing the situation in which it is not feasible to launch new navigation satellites because the existing constellation is comprised of GLONASS-M satellites operating beyond their guaranteed design lifetime. Nine more GLONASS-M satellites are in ground storage.
By Inside GNSS
A GNSS single-antenna system can be compared to a single-pixel camera. Electromagnetic waves traveling 20,000 kilometers from every overhead direction can reach us. Yet once at the antenna, this diverse set of information is collapsed into a single magnitude and phase value, then sent off to the receiver so that value can be extracted.
By Inside GNSS
Most folks look to a new year as an opportunity for fresh starts and new projects. For the GPS community, however, the October 1 start of the 2016 federal fiscal year (FY16) will likely be more about the hangover — that is, the issues that are hanging over into the next 12 months, unresolved.
At the top of that list of unfinished business are two system decisions: a go/no-go determination on whether the United States will build eLoran as the U.S. backup to GPS and deciding whether or not to choose a new contractor for the GPS III program.
By Dee Ann Divis
LightSquared’s proposed GPS receiver tests are relying on an outdated standard of GPS accuracy, a choice some experts suggest is a maneuver aimed at dramatically lowering the bar the would-be wireless broadband company has to meet for showing noninterference to GPS signals.
By Inside GNSS
The Precise Time and Time Interval Systems and Applications meeting is technical conference held each year for PTTI managers, system engineers and program planners. It will be held at the Hyatt Regency in Monterey, California on January 25 through 28. It is sponsored by the Institute of Navigation (ION).
In 2016, for the first time, PTTI will be co-located with the ION International Technical Meeting. Registration for one event entitles attendees to attend all sessions of both events.
By Inside GNSS
A Federal Register notice published yesterday (August 18, 2015) seeking comment on plans to shut down a large portion of the Nationwide Differential GPS (NDGPS) network marks the effective end of a program that spurred a hard-fought controversy in the era of Selective Availability (SA).
By Inside GNSS
The Federal Communications Commission (FCC) is weighing a request to waive spectrum rules for a new ultra-wideband (UWB) device that would operate across a wide swath of frequencies including those used by satellite navigation. The proposal has prompted a call for a wider reconsideration of ultra-wideband limits, a suggestion opposed by the GPS community.
By Inside GNSS
