Research & Development

September 1, 2014

Innovation: How Deep Is That White Stuff?

By Richard B. Langley

photo: SCOTT STEPHENSON, XIAOLIN MENG, TERRY MOORE, ANTHONY BAXENDALE, ANTHONY BAXENDALE and TIM EDWARDS

July 1, 2014

Innovation: Not Just a Fairy Tale

By Richard B. Langley

FIGURE 1. Global vTEC map obtained with the NeQuick electron density model for a sunspot number of 150 at 13h UT in the month of April (grid resolution 2.5 degrees × 2.5 degrees).

June 1, 2014

Innovation: The European Way

By Richard B. Langley

photo: Symmetricom

May 1, 2014

Innovation: Reducing the Jitters

By Richard B. Langley

Dornier Do 128-6

April 2, 2014

Innovation: Ground-Based Augmentation

By Richard B. Langley

By Sarang Thombre, Jussi Raasakka, Tommi Paakki, Francescantonio Della Rosa, Mikko Valkama, Laura Ruotsalainen, Heidi Kuusniemi, and Jari Nurmi

March 1, 2014

Innovation: A PET Project from Finland

By Richard B. Langley

FIGURE 2. The network of the four stations used in the evaluation procedures.

February 1, 2014

Innovation: Ionospheric Modeling Using GPS

By GPS World Staff

FIGURE 1. A cycle slip affecting phase measurements but not the pseudoranges.

January 1, 2014

Innovation: Cycle Slips

By Richard B. Langley

November 1, 2013

Innovation: Hunting for GNSS Echoes

By Richard B. Langley

October 1, 2013

Innovation: Getting Closer to Everywhere

By Richard B. Langley

September 1, 2013

Innovation: Under Cover

By Richard B. Langley

By Oliver Montenbruck, Chris Rizos, Robert Weber, Georg Weber, Ruth Neilan, and Urs Hugentobler

July 1, 2013

Innovation: Getting a Grip on Multi-GNSS

By Richard B. Langley

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