Government Opinions

GPS III Sources Sought?

August 13, 2014By
GPS-III-Lockheed-O

So, there I was, sipping a cold green tea in the shade on my back deck in the beautiful foothills of the Rocky Mountains in early June, when the phone began to ring off the hook. Upon answering, I was hit with a barrage of questions. Have you seen the GPS III Sources Sought? What should we do? Do you... read more

This article is tagged with and posted in Defense PNT Newsletter, Government Opinions, Newsletter Editorials

GPS Industry Breathes Sigh of Relief

June 25, 2014By
LightSquared-spectrum-W

The U.S. Federal Communications Commission convened a June 20 workshop on “GPS Protection and Receiver Performance” whose bite turned out to be far less than its bark had led some in the GPS industry to fear. The hastily assembled workshop — three weeks notice was given — appeared at first notice to derive from the call for “GPS receiver performance standards”... read more

eDLoran Surprise: European Navigation Conference 2014

May 14, 2014By
Shipboard DLORAN receiver installation (orange boxes on rails).

At the ENC-GNSS Conference in Rotterdam, we delved into actions necessary to officially use EGNOS (giving me déjà vu from WAAS’s early days), heard sage words from Brad Parkinson, the father of GPS, and, on the last day, saw amazing proof of a claim many of us initially thought was outrageous —that differential (DLoran) with modern monitoring can result in consistent horizontal accuracies approaching five meters on a moving platform. read more

Out in Front: Complements of the Season

February 1, 2014By
Alan Cameron

In the wake of last month’s Expert Advice column on eLoran — “The Low Cost of Protecting America” by Dana Goward of the Resilient Navigation and Timing Foundation —  come several positive comments and encouraging developments. Rather than rehearse all the arguments why we should care about this, I’ll repeat the one word that I heard most often in GNSS... read more

Directions 2014: Galileo IOV Passes with Flying Colors

December 1, 2013By

Following the second Galileo launch in October 2012, leading to four operational satellites in orbit, a progressive chain of events has taken place in 2013 encompassing all Galileo Services, starting from the first position fix on March 12 (Figure 1), when navigation message continuous broadcast began. read more

Directions 2014: Serve the World, Benefit Mankind — A System Matures

December 1, 2013By
Distribution of visible in-orbit BeiDou satellites.

By adhering to the principles of independence, openness, compatibility, and gradualness, China has steadily pushed forward the deployment of the BeiDou Navigation Satellite System (BDS), following a planned three-step strategy. In 2000, BeiDou Navigation Satellite Demonstration System was completed. By December 2012, five geostationary orbit (GEO) satellites, five inclined geosynchronous orbit (IGSO) satellites, and four medium-Earth orbit (MEO) satellites had been launched, forming the constellation, and formally beginning service provision to the Asia-Pacific region. read more

Directions 2014: Keeping Our Commitment to Civil Users

December 1, 2013By
Colonel William T. “Bill” Cooley.

The cliché “time flies when you’re having fun” accurately describes how quickly the past six months have passed for me. In a program as challenging, rewarding, and mission-critical as GPS, it is full-speed ahead all the time. As the GPS director, I am acutely aware of the importance of time — particularly high-accuracy time. Since declaring initial operational capability in December 1993, the extremely precise time service delivered by GPS has enabled numerous technological advances around the globe. read more

Test Results from Real-Time CORS Streaming, Space Weather and NDGPS

May 16, 2013By
KK2060Hole

Being a person who enjoys spending time in the field using RTK and DGPS, I followed up on my column last month, “Sources of Public, Real-time, High-Precision Corrections,” with a trip to the field to test the NGS CORS Streaming service. About a month ago, I made a trip to Colorado to attend the Space Weather Workshop in Boulder, stop... read more