Cover Story Archives - Page 6 of 12 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

September 3, 2012

Spoofs, Proofs & Jamming

TABLE 1. Spoofer antenna requirements for various hardened GPS signal types

“Here is Edward Bear, coming downstairs now, bump, bump, bump, on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn’t.”
– A.A. Milne, Winnie-the-Pooh

Is our faith in the integrity and infallibility of the Global Positioning System misplaced or, perhaps, insufficiently grounded?

By Inside GNSS

July 17, 2012

SIDEBAR: Safe Navigation from Hybrid, Redundant Navigation Sensor Sys¬tems

Return to main article: "Drones to the Rescue!"

Navigating safely is always necessary, and unmanned platforms especially need to do so, as they still must demonstrate to the general and technical public that flying without a pilot on board works and is safe (or as safe as piloted crafts). So, when asking ourselves what is the right approach to safe navigation in UAVs, one word steps immediately into the discussion: redundancy.

By Inside GNSS

SIDEBAR: Requirements for Precision-Based Integrity and Geodetic Quality Control in UAV-Based SAR Missions

Return to main article: "Drones to the Rescue!"

By Inside GNSS

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SIDEBAR: Flight Control and Target Identification Requirements and Results with EGNOS and Multi-Constellation GNSS

Return to main article: "Drones to the Rescue!"

Following a route defined by application requirements and remotely sensing the environment in order to analyze and interpret the outcome on- and off-line: this is the axioma of every aerial remote-sensing mission and, indeed, also for search missions. Yet, the specific requirements for navigation might vary according to the application.

By Inside GNSS

July 5, 2012

Drones to the Rescue!

August 1994, early morning. Spain’s Central Pyrenees Mountains still in darkness.

At the outset of an ascent to a 3,000-meter peak along the international border, one of the co-authors encounters a group of tourist hikers who have begun searching for a colleague who had left the camp the previous evening. In the pre-sunrise gloom, helicopters cannot yet operate.

A week later, the body of the hiker is found. The rescue efforts came, unfortunately, too late.

By Inside GNSS