TAG: gold standard

In GNSS Race, Could Galileo Be Surging into Second?

March 4, 2015By
σ(pr_gnd) versus elevation for Galileo E1 (dotted lines) and GPS L1 (solid lines for different smoothing constants: red (10s), green (30s), cyan (60s), purple (100s).

A Lockheed Martin vice president has stated that the first GPS III satellite will likely launch in 2017, not 2016 as had been projected in the most recent update. The company is readying the first satellite for launch availability by the end of 2015, for launch as early as the end of this year, but Mark Valerio, vice president and general manager of Lockheed Martin's military space business, stated in a Feb. 18 news briefing that he expects the Air Force will schedule its launch for early 2017. read more

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Out in Front: Epic Fail

July 1, 2014By

Sometimes the patient has to get sick in order to get better. The eruption of a malady leads to identification of an underlying condition; appropriate treatment can then be devised to cure the body of its ills. Sound like House, M.D.? As a variant on this plot line, the patient can know full well what is wrong deep down inside,... read more

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The Gold Standard: What’s in a Name?

February 12, 2014By
Don Jewell

Our esteemed editor-in-chief and publisher at GPS World, Alan Cameron, penned an editorial in January concerning claims made by the People’s Republic of China regarding the Gold Standard for PNT (position, navigation and timing). The Chinese recently claimed that its BeiDou system averaged a user range error (URE) of 2.5 meters using zero age of data (ZAOD), 95% of the... read more

This article is tagged with , , , and posted in Defense, Opinions

The System: Competition for the Gold Standard

February 1, 2014By
The main antenna of the second Galileo Full Operational Capability (FOC) satellite being inspected with a flashlight in advance of mass property testing at the European Space Agency’s  ESTEC Test Centre in the Netherlands. Thermal-vacuum testing on the second model began in early 2014. The two FOC satellites will be launched on a Soyuz rocket from Europe’s French Guiana Spaceport in mid-2014. Whether four more can rise and begin providing initial Galileo services by the end of the year is the question of the hour.

BeiDou Releases Public Service Performance Document In late December, director Ran Chengqi of China’s Satellite Navigation System Management Office announced the BeiDou Navigation Satellite System (BDS) Public Service Performance Standard. The document details the public service performance parameters of the BeiDou system, including service area, accuracy, integrity, continuity, and availability. It is a basic commitment to customers from BDS providers,... read more

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Who Carries the Gold Standard Now?

January 28, 2014By
GNSS_opener

China’s BeiDou system claimed a user range error (URE) of 2.5 meters zero age of data (ZAOD) 95% recently.  The parallel GPS specifications commit to 6 meters 95% ZAOD and 7.8 meters 95% all AODs.  Does this mean that BeiDou is more accurate than GPS? Not so fast. In late December, director Ran Chengqi of China’s Satellite Navigation System Management... read more