My GNSS History

A Washington journalist told me that some members of PNT and GPS community try to discredit my reputation instead of criticizing or responding to my technical reports. At his request, I summarize my GNSS credentials once more in here:

In 1983, I co-pioneered high precision GPS at Trimble by introducing Trimble 4000-S. It was a 4-channel geodetic receiver. I single-handedly wrote its entire software. 16 hours a day, 7 days a week for several years. It was the first commercial geodetic GPS receiver and it changed the geodetic survey industry.

Later, after I founded Ashtech; in 1989 we introduced Ashtech L-12. This was the first All-in-One, All-in-View 12-channel geodetic GPS receiver. After that, we introduced Ashtech M-12 and the legendary Ashtech Z-12. These were the first truly portable geodetic GPS receivers. We were also the first to integrate GPS and GLONASS satellites. It took all other companies more than 10 years to catch up and add GLONASS to their receivers. Ashtech still is a very successful company and after changing hands several times, was recently purchased by Trimble.

In 1998 I founded JAVAD Positioning Systems (JPS) and introduced Legacy, Odyssey, and Regency products followed by HiPer. It was a 76-channel geodetic receiver. Other companies later copied HiPer. Today many of GNSS receivers look like it. I sold JPS to Topcon, who changed its name to Topcon Positioning System (TPS) and is a very successful company.

In 2007, after my obligations to Topcon ended and according to the provisions of our agreement, I founded JAVAD GNSS and introduced TRIUMPH products. These were 216-channel receivers, integrated with several communication channels. We also introduced their ALPHA, DELTA, and SIGMA versions. We were again the first to offer European Galileo and Japanese QZSS tracking in mass production. TRIUMPH technology has been shown to have the best signal quality and best multipath reduction capabilities against all others tested by the German Aerospace. We also introduced GLONASS inter-channel (group/carrier delay) calibration to 0.2 millimeter which made GLONASS FDMA as good as GPS CDMA. JAVAD GNSS is growing fast and gaining market share.

In June 2010, we introduced the revolutionary and the only fully integrated geodetic receiver in the market, TRIUMPH-VS, with features like “Lift & Tilt”, “Interference Analyzer”, and “Visual Stakeout”. It is the most advanced high precision GNSS receiver in the market capable of tracking current and next generation signals of GPS, GLONASS, QZSS, and Galileo signals.

In October 2011, we introduced LightSquared compatible GNSS receivers and we plan to introduce LightSquared integrated GNSS receivers and sub-nanosecond (100- and 10-picoseconds) time-transfer products.

I hold B.S. degree in Electronic Physics, M.S. in Electrical Engineering,
M.S. in Mathematics, and Ph.D. in Electrical Engineering from
the University of Iowa, Iowa City, Iowa, U.S.A.