B: Applications

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May 20, 2015

Estimating the Short-Term Stability of In-Orbit GNSS Clocks

Global navigation satellite systems provide position, velocity, and time (PVT) solutions to users whose receivers calculate position based on one-way ranging from satellites. As is well-understood, a key step in the positioning process involves a determination of the difference between the time of signal transmission identified in the satellite’s broadcast navigation message and the time of its reception by user equipment.

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By Inside GNSS
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Thinking Small

Equations 2, 7, 8, 9, 10 & 11

Unmanned aerial vehicles (UAV) are finding increased application in both domestic and governmental applications. Small UAVs (maximum take off weight less than 20 kilograms) comprise the category of the smallest and lightest platforms that also fly at lower altitudes (under less than 150 meters).

Designs for this class of device have focused on creating UAVs that can operate in urban canyons or even inside buildings, fly along hallways, and carry listening and recording devices, transmitters, or miniature TV cameras.

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By Inside GNSS
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USAF Draft RFP Would Re-Open Competition for GPS Satellite Launch Services
May 14, 2015

USAF Draft RFP Would Re-Open Competition for GPS Satellite Launch Services

GPS Block IIF-5 on its way from Cape Canaveral on February 20, 2014. Photo by Ben Cooper, United Launch Alliance

[Updated May 26, 2015] The U.S. Air Force released a draft request for proposal (RFP) yesterday (May 13, 2015) for GPS III Launch Services, including launch vehicle production, mission integration, and launch operations. The Space Exploration Technologies Corporation — better known as SpaceX and headed by Elon Musk — may well enter the competition.

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By Inside GNSS
Trimble Launches Multi-GNSS, Inertial Module and Enclosure
May 7, 2015

Trimble Launches Multi-GNSS, Inertial Module and Enclosure

Trimble’s BD935-INS (left) and BX-935-INS

Trimble has introduced the BD935-INS module that combines a multi-frequency, multi-GNSS receiver with an integrated 3-D microelectromechanical systems (MEMS) inertial sensor package.

As part of Trimble’s GNSS OEM portfolio, the new compact module augments real-time precise positioning with 3-D orientation, connectivity, and configuration capabilities designed to enable system integrators and OEMs to add GNSS and attitude to specialized or custom hardware solutions.

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By Inside GNSS
Lockheed Completes Integration of First GPS III Spacecraft
May 6, 2015

Lockheed Completes Integration of First GPS III Spacecraft

In April, Lockheed Martin fully integrated the U.S. Air Force’s first next-generation GPS III satellite at the company’s Denver, Colorado–area satellite manufacturing facility. The first in a design block of new, more powerful and accurate GPS satellites, GPS III Space Vehicle One is now preparing for system-level testing this summer. Lockheed Martin photo

Lockheed Martin has finally been able to announce victory in its effort to complete integration of the first GPS Block III satellite.

Integration took place last month at the company’s GPS III Processing Facility near Denver, Colorado, bringing together the system module — which includes the navigation payload that performs the primary positioning, navigation, and timing mission — the functional bus containing the electronics that manage all satellite operations, and the propulsion core that enables the satellite to maneuver for operations on orbit.

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By Inside GNSS
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Car Technology Choice Study Shows Low Interest in Navigation Functions
April 26, 2015

Car Technology Choice Study Shows Low Interest in Navigation Functions

Navigation technologies appear to be losing their charm among new car buyers in the United States.
 
Twenty years after Detroit introduced the first in-vehicle car navigation systems, employing GPS and digital map technology, collision avoidance appears to be the common theme among the most popular automotive technologies, according to a new J.D. Power study released last Wednesday (April 22, 2015).
 

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By Inside GNSS
FAA Awards New GPS WAAS Contract to Raytheon
April 21, 2015

FAA Awards New GPS WAAS Contract to Raytheon

The Federal Aviation Administration (FAA) has awarded a $103-million contract to the Raytheon Company to maintain the GPS Wide Area Augmentation System (WAAS).

The company will develop a payload to be incorporated into a new geostationary satellite and two associated ground uplink stations to support the WAAS system within U.S. airspace. WAAS improves real-time GPS accuracy from 10 meters to about two meters by transmitting differential corrections as well as integrity messages and an additional ranging signal.

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By Inside GNSS
GNSS Markets, Standards, and Resilience at the European Navigation Conference
April 14, 2015

GNSS Markets, Standards, and Resilience at the European Navigation Conference

The 2015 edition of the European Navigation Conference (ENC) in Bordeaux last week found the continent’s GNSS community leaving troubles behind and looking to the future, where the world’s dependence on GNSS is greater, the risks higher, and the potential profits ever more tantalizing.
 
Speaking at the opening session dedicated to “the impact of GNSS on the economic sector,” Topos Cluster President Florence Ghiron answered the question in the simplest of terms: “We expect the GNSS market to grow and to include more and more industrial sectors.”
 

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By Inside GNSS
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