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Inside GNSS magazine • Volume 10 Number 3

May/June 2015

Online News, Articles, and Features

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Cover Story

Thinking Small

Prototyping an Accurate Position and Attitude Estimator for Small UAVs with Commercial IMUs and Low-Cost GNSS
A design team tells how they developed a low-cost attitude determination and navigation system based primarily on mass market OEM GNSS receivers and antennas, aided by MEMS inertial sensors.
Article
Technical Article

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

Following Launch on GEO/GSO Satellites
An engineering team proposes a method for determining the time of atomic clocks onboard satellites in geosynchronous and geostationary orbits when precise ephemeris data from ground monitoring stations are unavailable during initial checkout following launch.
Columns & Editorials
GNSS Solutions

Are there special considerations for dealing with raw GNSS data?

Working Papers

Double Phase Estimator

Towards a New Perception of the Subcarrier Component
This article introduces an advanced tracking algorithm that exploits a new conception of the subcarrier to fully benefit from the structure of BOC-modulated signals.
Washington View

Same Issues, Fierce Debate as LightSquared Bankruptcy Ends; GPS Spectrum Battle Reappears

The Adjacent-Band Compatibly Assessment aims to head off future interference issues by letting companies know in advance the power limits by which they need to abide in order to avoid interfering with GPS.
Thinking Aloud

Still Not a Thing, Part 2

Do You Know How Fast Your Train Is Going?
The National Transportation Safety Board has included positive train control on its “Most Wanted List” every year since 1990. Why is this still not a thing in 2015?
GNSS Hotspots

GNSS Hotspots

Disposable drones, cyber shark hacks a jet, so over in-car navigation, and an LBS shopping spree.
Thought Leadership Series

Farm Vehicle Automation

Not With GNSS Alone
More difficult operating environments, scarcity of skilled workers, and use with valuable crops drive the search for hi-tech solutions.
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