Archives

The Best and Final Look at the GPS 24+3 Configuration

February 17, 2010 - By

I didn’t plan it this way, but my coverage of GPS 24+3 turned out to be a three-part series, with this column being part three. One reason it turned into a three-part series is because I’m learning more about it along the way, but its mostly because details weren’t released all at once. read more

This article is tagged with and posted in Newsletter Editorials, Opinions, Survey, Survey Scene

The Spy Who Loved Me

February 16, 2010 - By

With apologies to James Bond, Ian Fleming, and, well, just about everybody else. Here is a grab from my mail bag.  The message was subject-lined: GPS Spy Applications. “I recently suspected my wife of cheating, having been involved with gps as a land surveyor since 1995, I used and application called mobile-spy. “In order to install the application onto an... read more

This article is tagged with , and posted in All Blogs, Editor's Wide Awake Blog, GNSS, Personal Tracking

GPS 24+3 Configuration: A Closer Look

February 3, 2010 - By

In the few years I’ve been writing this column, very few subjects have warranted back-to-back newsletter coverage. The new GPS 24+3 configuration is one of them. The reason I’ve continued with this discussion is because it will significantly affect your GPS operations, especially if you’re using RTK or DGPS. read more

This article is tagged with and posted in Newsletter Editorials, Opinions, Survey, Survey Scene

Innovation: Mobile-Phone GPS Antennas

February 1, 2010 - By

Can They Be Better?
We examine the antenna designs that provide GPS functionality to mobile phones and why most phones still do not provide GPS operation indoors. We also see what it will take to make them better. read more

This article is tagged with and posted in GNSS, Innovation

Multi-Sensor, Multi-Network Positioning

February 1, 2010 - By

Currently, no single technology, system, or sensor can provide a positioning solution any time, anywhere. The key is to utilize multiple technologies. We are now exploring a multi-sensor multi-network (MSMN) approach for a seamless indoor-outdoor solution. Its hardware platform is described in the previous article. The digital signal processor (DSP) is embedded in the GPS module. All sensors are integrated to the DSP that hosts core software for real-time sensor data acquisition and real-time processing to estimate user location. A smartphone handset provides wireless network measurements. read more

This article is tagged with and posted in Algorithms & Methods, Personal Navigation

Going 3D

February 1, 2010 - By

To enrich user experience of location-based services and personal navigation, three-dimensional models such as those used in urban planning are added to a smartphone platform, without the requirement of additional hardware. read more

This article is tagged with , , , and posted in Personal Navigation

The System: New Math for GPS

February 1, 2010 - By

The U.S. Air Force GPS Wing and 50th Space Wing have begun repositioning GPS satellites in space to fly what they call the 24+3 or Expandable 24 constellation plan. The initiative will take up to 24 months to fully implement. Benefits to users will be slowly realized during that time, as the number of GPS satellites in view will increase, potentially increasing GPS receiver accuracy. Plus: Penny-Wise, Pound-Foolish U.S. Coast Guard to Pull Loran Plug; Galileo Satellites Awarded to OHB; Compass at Three read more

This article is tagged with and posted in The System, Uncategorized

Expert Advice: Integrity: Lessons from the 2008 Financial Collapse

February 1, 2010 - By

Deterministic risk modeling, the basis of the Efficient Market Hypothesis (EMH) at the core of modern quantitative finance, is known to be fundamentally flawed, but its elegance and convenience has blinded researchers to growing evidence of its weaknesses. The near-complete acceptance of the EMH led to models that dramatically accentuate its flaws, which in turn led to absurd but eagerly accepted conclusions for loan-default risk. These models proved dramatically vulnerable to changes in the housing market in 2007–2008 and led directly to the ensuing crash. read more

This article is tagged with , and posted in Expert Advice & Leadership Talks, GNSS, GNSS Opinions, Opinions