Global Navigation Satellite Systems Engineering, Policy, and Design
A 4D extension of complex numbers, bicomplex numbers allow for a compact representation of GNSS meta-signals with components from two different frequencies. Acquisition and tracking algorithms are obtained from the bicomplex signal representation, giving it potential for effective dual-frequency GNSS signal processing.
DANIELE BORIO, EUROPEAN COMMISSION, JOINT RESEARCH CENTRE (JRC)
By Inside GNSS
Cheryl Gramling knew early on what she wanted to do in life. Today, she is assistant chief for technology, mission engineering and systems analysis division, at NASA’s Goddard Space Flight Center, and she’s playing a key role in getting us back to the Moon.
By Peter Gutierrez
With the new SimORBIT high-accuracy orbital modeling software from Spirent, developers can now calculate LEO orbits and their characteristics for more precise GNSS/PNT testing.
By Inside GNSS
The team at UK based OxTS recently completed a survey with its developmental LiDAR mounted backpack at an unexpected location: Minster Lovell Hall, an English Heritage site in Oxfordshire.
By Inside GNSS
An approach leveraging time-transfer from Earth-GPS.
SRIRAMYA BHAMIDIPATI, TARA MINA, GRACE GAO, STANFORD UNIVERSITY
By Inside GNSS
The Robot Plotter is a compact, fully autonomous, self-driving robot that uses RTK-GNSS positioning to place lines and other markings on a variety of ground surfaces. The machine, made by Netherlands-based Tyker Automation, sets out markings 12 to 16 times faster than traditional three- or four-person crews.
By Peter Gutierrez
Dee Ann Divis, the founding editor of Inside Unmanned Systems and contributing editor for Inside GNSS, died Nov. 22 at the age of 62, just days from her Dec. 19 birthday.
By Brett Davis
In the wake of the latest COP session on international climate change, and as the world continues to deal with the effects of a warming planet, researchers say more and better data can help ameliorate the damage and provide answers on how to respond to it.
By Brett Davis
The industry is innovating in GNSS, IMU and HD mapping technology, but more work is needed to develop higher performance, lower cost applications that enable instant, extremely accurate positioning at the centimeter level or better for lane-level navigation.
By Kevin Jost
Combining multipath assisted positioning and fingerprinting using deep learning brings the best of two worlds together: low complexity and good performance.
MARKUS ULMSCHNEIDER, CHRISTIAN GENTNER AND ARMIN DAMMANN, GERMAN AEROSPACE CENTER (DLR), INSTITUTE OF COMMUNICATIONS AND NAVIGATION
By Inside GNSS
JIYUN LEE, GIHUN NAM AND K. ANDREW SUN, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)
A: Many forms of differential GNSS (DGNSS) exist to provide GNSS users with corrections to their pseudorange and carrier-phase measurements along with information to support their applications and provide integrity assurance [1].
By Inside GNSS
In this column, guest contributor Mike Horton from ANELLO Photonics introduces a new gyro technology that bridges the market gap between high-performance (but expensive) sensors (fiber-optic and ring laser gyros) and low-cost (but imprecise) MEMS gyros. Benefits of improved gyro quality enabled by SIPHOG are illustrated, including GNSS-denied navigation scenarios.
By Inside GNSS
While an independent report from NASEM has validated some NTIA GPS interference claims, no real mitigation is in in sight.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
