GNSS (all systems) Archives - Page 51 of 165 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Real-Time Automated Aerial Refueling with Stereo Vision: Overcoming GNSS-Denied Environments In or Near Combat Areas

In-flight refueling requires sustained minimal separation between paired aircraft with little room for error. In or near combat zones, wide-area GPS-denial or spoofing means that an GPS-independent system must be available. Regardless of the selected sensor package, a common set of properties must be satisfied to facilitate mid-air docking: a high degree of accuracy, precision, and integrity.

By Inside GNSS

August 6, 2021

GNSS Backup eLoran Trialed Using Grandmaster Clock

UrsaNav and ADVA have conducted an enhanced long-range navigation (eLoran) field trial using UrsaNav’s eLoran receiver and ADVA’s Oscilloquartz grandmaster clock technology. The successful demo showed that eLoran offers a robust and reliable backup for GPS and other GNSS and could be used to provide an assured position, navigation, and timing (PNT) service.

By Inside GNSS

August 5, 2021

Contract to Develop Positioning and Navigation Network for the Moon

The U.S. Air Force Research Laboratory’s AFWERX program awarded a Phase II SBIR contract to Masten Space Systems to develop and demonstrate a lunar positioning and navigation network prototype. With functionality similar to GPS, the network will enhance cislunar security and awareness by enabling navigation and location tracking

By Inside GNSS

GNSS Forecasting Takes Guesswork out of UAV BVLOS Mission Planning

Situational awareness and risk assessment are key to UAV mission planning in both dense urban areas and, surprisingly, in open-sky areas such as over ocean coastlines. Successful results depend closely upon scheduling for the most advantageous hours, or even minutes, to overfly particular areas.

By Inside GNSS

Topcon, DDK Positioning, Iridium and Oceaneering International Team for Offshore Solution

Topcon Positioning Systems will supply GNSS hardware components to DDK Positioning Ltd. of Aberdeen, Scotland, to integrate with signals from the Iridium satellite network to create a robust, resilient and completely independent GNSS-augmenting positioning solution.

By Inside GNSS

Evaluation of Sensor-Agnostic All-Source Residual Monitoring for Navigation

The addition of alternative sensors such as cameras, magnetometers, and small ranging radios increases the likelihood of a mismodeled and/or faulty sensor, affecting the accuracy and performance of the overall navigation solution. Unlike two-sensor systems such as GPS-inertial integration, systems of three or more sensors present the problem of ambiguity as to which sensor is adversely affecting the solution. This presents the need for a robust framework that can maintain navigation integrity despite the additional sensor modalities.

By Inside GNSS

August 4, 2021

Q: How to mitigate a spoofing signal while tracking it for intent analysis?

In a GNSS spoofing attack, a terrestrial radio transmitter mimics GNSS signals at a greater signal strength than the actual system can transmit. In order to detect and mitigate a spoofing attack, it is important to know where a spoofing signal comes from and what it tries to accomplish for its ultimate neutralization.

By Inside GNSS

August 3, 2021

New Galileo G2 Payloads Hit the Testing Beds

Testing of the first Galileo Second Generation (G2) hardware has begun, with versions of the satellites’ navigation payloads and antennas undergoing evaluation to check whether they meet the ambitious performance levels set for the coming generation of Europe’s GNSS.

By Inside GNSS

GNSS Interference Mitigation: Modulations, Measurements and Position Impact

Interference mitigation techniques should protect GNSS receivers from interference and jamming without biasing their final position, velocity and timing solution. This column analyses five popular interference mitigation techniques, including the Adaptive Notch Filter (ANF) and Pulse Blanking (PB), evaluating their impact on pseudoranges and on the final position and timing solution. Several GNSS modulations are considered, showing the advantage of using GNSS signals with similar spectral characteristics.

By Inside GNSS

August 2, 2021

Resilient PNT for Critical Applications: The Need for Modular Open System Architectures – and Much More

There has been much discussion of the need for resilient PNT over the past few years as dependencies have grown and an evolving threat matrix has become more active. As a nation, we need a measured and cost-effective response commensurate with the level of threats and the possible consequences.

By Inside GNSS

July 30, 2021

Skylark Wide-Area Corrections Expand to Japan

Swift Navigation of San Francisco and Tokyo-based KDDI Corporation, a telecommunications company have partnered to bring precise positioning to the Japanese market.

By Inside GNSS

Hydrogen Atomic Clocks to Fly on Galileo Second Generation

The European Commission and the European Space Agency (ESA) selected Leonardo’s hydrogen atomic clocks for Galileo Second Generation.

By Inside GNSS

July 29, 2021

Spacestar PPP Service Heads into Orbit

Fugro’s SpaceStar GNSS Precise Point Positioning (PPP) service provides high-accuracy positioning in space. Highly accurate positioning in LEO is becoming increasingly important for Earth observation applications, safe constellations management, and space debris collision avoidance.

By Inside GNSS

GNSS (all systems)

What Has 72 Sensors, 8 Legs, 32 Wheels, Weighs 460 Tons and Uses ...

Enhanced RTX GNSS Correction Service Performance Empowers Surveyo...

Real-Time Automated Aerial Refueling with Stereo Vision: Overcoming GNSS-Denied Environments In or Near Combat Areas

GNSS Backup eLoran Trialed Using Grandmaster Clock

Contract to Develop Positioning and Navigation Network for the Moon

GNSS Forecasting Takes Guesswork out of UAV BVLOS Mission Planning

Topcon, DDK Positioning, Iridium and Oceaneering International Team for Offshore Solution

Evaluation of Sensor-Agnostic All-Source Residual Monitoring for Navigation

Q: How to mitigate a spoofing signal while tracking it for intent analysis?

New Galileo G2 Payloads Hit the Testing Beds

GNSS Interference Mitigation: Modulations, Measurements and Position Impact

Resilient PNT for Critical Applications: The Need for Modular Open System Architectures – and Much More

Skylark Wide-Area Corrections Expand to Japan

Hydrogen Atomic Clocks to Fly on Galileo Second Generation

Spacestar PPP Service Heads into Orbit