GNSS (all systems) Archives - Page 112 of 153 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

GNSS (all systems)

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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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Flying Blind
March 20, 2015

Flying Blind

It’s 10 p.m. somewhere over the vast oceans that comprise three-quarters of the Earth’s surface. Do you know where your airplane is?

Well, you could, but maybe you don’t.

The anniversary of the disappearance of Malaysia Airlines flight MH370 came and went in March with the fate of the Boeing 777 still unknown.

It didn’t have to happen.

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By Inside GNSS
GNSS and Precision Farming
March 14, 2015

GNSS and Precision Farming

Dr. John Fulton, Ohio State University

Nowhere has the fact that GNSS can guide things besides military weapons and transport manifested itself more profoundly than in agriculture.

While Google and automotive manufacturers struggle to figure out how to put autonomous vehicles on the highway, farmers have been using GNSS for well over a decade to guide equipment through their fields — along with a host of other ag-related, site-specific applications.

Indeed, GNSS — along with an array of other high-tech resources — is transforming agriculture at an accelerating rate.

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By Inside GNSS
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How does a GNSS receiver estimate velocity?

How does a GNSS receiver estimate velocity?

Equations 1 – 11

Q: How does a GNSS receiver estimate velocity?

A: Stand-alone single-frequency GNSS receivers represent the largest slice of the commercial positioning market. Such receivers operate mainly in single point position (SPP) mode and estimate velocity either by differencing two consecutive positions (i.e., approximating the derivative of user position) or by using Doppler measurements related to user-satellite motion.

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By Inside GNSS
NOAA’s National Geodetic Survey (NGS) Geospatial Summit 2015
March 8, 2015

NOAA’s National Geodetic Survey (NGS) Geospatial Summit 2015

Arlington, Virginia

NOAA’s National Geodetic Survey (NGS) Geospatial Summit will be held at the Crystal City Hilton in Arlington, Virginia on April 13-14, 2015.

Registration is now open. Early registration ends March 13, 2015.

NGS will be hosting three events, each one providing a venue for NGS to share information about its products and services as well as hear from its customers across the public and private sectors.

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By Inside GNSS
IEEE ISISS 2015 - International Symposium on Intertial Sensors and Systems
February 10, 2015

IEEE ISISS 2015 – International Symposium on Intertial Sensors and Systems

Kauna’oa Bay and Beach, with Mauna Loa in the background

The 2nd IEEE International Symposium on Inertial Sensors and Systems will be held at the Hapuna Beach Prince Hotel on the Big Island of Hawaii on March 23 – 26, 2015.

Online registration is open.

This event covers the latest developments in the area of modern inertial sensors and emerging applications.

Invited Speakers:

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By Inside GNSS
2015 Space Weather Workshop

2015 Space Weather Workshop

The annual Space Weather Workshop will take place on April 13 – 17 2015 at the Millennium Hotel in Boulder, Colorado, U.S.A.

Registration will be open soon.

This meeting will bring together customers, forecasters, vendors, government agencies and researchers of space weather information.

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By Inside GNSS
INSPIRE - Geospatial World Forum 2015

INSPIRE – Geospatial World Forum 2015

Lisbon Castle

The INSPIRE – Geospatial World Forum 2015 and industry exhibition will be held at the Lisbon Congress Center in Lisbon, Portugal on May 25 – 29, 2015.

The call for abstracts has closed. Early registration is open until March 10, 2015. Spot registration will be available.

This year’s theme is "CONVERGENCE: Policies + Practices + Processes via PPP" Plenary and thematic sessions include:

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By Inside GNSS
GEOINT 2015: United States Geospatial Intelligence Foundation Symposium

GEOINT 2015: United States Geospatial Intelligence Foundation Symposium

Washington D.C. at sunset

The eleventh annual GEOINT Symposium and exhibition will take place on June 22 – 25, 2015 at the Walter E. Washington Convention Center in Washington D.C., U.S.A.

Registration for the GEOINT Symposium will open in February 2015.

The event will feature keynote speakers, breakout sessions, and provide attendees an opportunity to learn from leading experts, share best practices, and uncover the latest developments from government, military and private-sector leaders.


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By Inside GNSS
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