GNSS (all systems)

Software-Defined GNSS Simulator: A Step Forward

A few studies (by universities and industry) have shown the feasibility of simulation of real-time digital intermediate frequency (IF) signals based on a graphics processor unit (GPU). And a couple of articles have also demonstrated use of a universal software radio peripheral (USRP)–based software-defined radio (SDR) as a simulator (in playback mode) in real test environments.

Read More >

By Inside GNSS

ISGNSS and CGSIC 2015: International Symposium on Global Satellite Navigation Systems and Asia/Pacific Rim meeting of the CGSIC

The 16th International Symposium On GNSS 2015 will be held November 16 – 19, 2015 at Miyakomesse in Kyoto, Japan.

ISGNSS 2015 will be co-located with the Asia and Pacific Rim meeting of the CGIC (Civil GPS Service Interface Committee) to help improve understanding of the world trends in developing and deploying GNSS. The program will include keynote addresses, oral presentations, interactive poster sessions, panel sessions, open interactive forums and a trade exhibition.

Read More >

By Inside GNSS
[uam_ad id="183541"]

Still Not a Thing, Part 2

One of the first feature articles I wrote as a newly minted GNSS magazine editor 26 years ago was about an advanced rail traffic management system based on GPS that Burlington Northern, with the help of Rockwell Collins, had designed and implemented.

Read More >

By Inside GNSS

Farm Vehicle Automation

Now that we have had GNSS-driven precision in the fields for nearly 20 years, with widespread and growing acceptance by farm vehicle manufacturers and farmers, what lies ahead for precision agriculture?

Read More >

By Inside GNSS
[uam_ad id="183541"]

Are there special considerations for dealing with raw GNSS data?

Q: Are there special considerations for dealing with raw GNSS data?

A: Most GNSS users are only interested in position, velocity, and/or time (PVT) information provided by a receiver. In fact, most mass-market GNSS receivers (e.g., those in cell phones or in your vehicle) only provide PVT information along with some supporting data (such as the number of satellites tracked, dilution of precision, course over ground, and so forth).

Read More >

By Inside GNSS
May 20, 2015

Estimating the Short-Term Stability of In-Orbit GNSS Clocks

Global navigation satellite systems provide position, velocity, and time (PVT) solutions to users whose receivers calculate position based on one-way ranging from satellites. As is well-understood, a key step in the positioning process involves a determination of the difference between the time of signal transmission identified in the satellite’s broadcast navigation message and the time of its reception by user equipment.

Read More >

By Inside GNSS

Thinking Small

Unmanned aerial vehicles (UAV) are finding increased application in both domestic and governmental applications. Small UAVs (maximum take off weight less than 20 kilograms) comprise the category of the smallest and lightest platforms that also fly at lower altitudes (under less than 150 meters).

Designs for this class of device have focused on creating UAVs that can operate in urban canyons or even inside buildings, fly along hallways, and carry listening and recording devices, transmitters, or miniature TV cameras.

Read More >

By Inside GNSS
IGM_e-news_subscribe