Micro-scale PNT (Position, Navigation and Timing) and MEMS Sensing Development at HRL

Speaker: David T. Chang
Affiliation: Manager of Sensing Technologies Dept., HRL Laboratories


Positioning, navigation and timing (PNT) information is a critical need to the daily operations of our society. The military and civilians have become increasingly dependent on Global Positioning Systems (GPS) for accurate and precise PNT in a wide variety of operational environments — from commercial aviation to GPS-guided munitions.  However, as military and civilian activities are increasingly carried out in areas where GPS is denied, unreliable or inaccessible, the use of GPS has evolved from being a strategic advantage to a vulnerability. Many environments — such as buildings, urban canyons, under dense foliage, underwater and underground — have limited or no GPS access. Moreover, adversaries can easily block GPS access by jamming, spoofing and other GPS-denial threats.  As a result, alternative sources of PNT are required. The potential solution is the use of distributed, micro-scale timing and inertial navigation devices as alternative technologies.  In this talk, I will present an overview of the micro PNT development at HRL Laboratories for low cost, ubiquitous and GPS-free navigation and timing applications.


David T. Chang received the B.S., M.S., and Ph.D. degrees from the University of California, Los Angeles, in 1990, 1992, and 1998, respectively, all in physics. Since 1998, he has been involved in the design, fabrication, and characterization of surface- and bulk-micromachined sensors and resonators for inertial navigation and RF communication applications at HRL. He is currently the Manager of the Sensing Technologies Department and a Senior Research Scientist with HRL Laboratories, and has over 20 years of experience in the research and development of high performance MEMS sensing technologies. He has 43 patents and over 30 publications in the areas of micro and nano fabrication technologies, inertial and infrared sensors, RF MEMS, and heterogeneous integration of dissimilar semiconductors.

For more information, contact Prof. Rob Candler ()

Date(s) - Aug 26, 2016
11:00 am - 1:00 pm

E-IV Tesla Room #53-125
420 Westwood Plaza - 5th Flr., Los Angeles CA 90095