TAG: CNAV

L2C and Next-Generation Smart PNT Receivers

August 12, 2015By
SVN49 in space  (artist’s rendering).  The signal anomaly from SVN 49 alerted researchers to new possibilities in analysis and monitoring.

Are you using a legacy-model PNT (position, navigation and timing) receiver or a smart PNT receiver, and why does it matter? Don’t have a clue? Read on! Hint — L2C and CNAV (civilian navigation message format) are the major reason it matters. Yes, it’s all because of L2C, the controversial GPS civilian signal that seems to always be in the news and just... read more

To L2C or Not to L2C? That Is the Operational Question.

July 22, 2015By

Half of the GPS constellation now transmits the new civil signal, L2C. In a matter of weeks, that number will crest into the majority of the constellation when IIF-10 is set active and operational to users. By the end of the year or early 2016, look for 18 usable satellites transmitting L2C. That could be considered a nominal initial operating... read more

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The System: Celebrating 20 Years of GPS

April 1, 2015By
GPSIIF-launch-ULA-8

April marks the 20th anniversary of GPS FOC. U.S. Air Force Space Command declared Full Operational Capability (FOC) for the GPS constellation April 27, 1995, signifying the system met all requirements with 24 operational Block II/IIA satellites in their assigned orbital slots and providing both the military Precise Positioning Service (PPS) performance standard and the civil Standard Positioning Service (SPS)... read more

CNAV Performance ‘Matches or Slightly Outperforms’ Legacy Signals

March 19, 2015By

A quarterly meeting of the U.S. GPS Program’s interagency Civil Navigation Signals (CNAV) Tiger Team on March 5 focused on the new L2C and L5 GPS civil signals. “CNAV Message Types 10, 11, 30 and 33 are currently transmitted on seven GPS IIR-M (L2C) and eight GPS IIF satellites (L2C and L5),” wrote Rick Hamilton, CGSIC Executive Secretariat, USCG Navigation Center, in a status email to the Civil Global Positioning System Service... read more

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CNAV Messages Now Transmitted Daily

January 2, 2015By

News courtesy of CANSPACE Listserv.   Starting December 31, 2014, the Air Force 2nd Space Operations Squadron began transmitting daily CNAV uploads. The CNAV signals should continue to be considered pre-operational and should be employed at the user’s own risk. read more

This article is tagged with and posted in Design & Test, GNSS, Latest News

Directions 2015: What It Takes to Make a Gold Standard

December 1, 2014By
GPS-directions-Cooley

Last year in my “Directions” article, I emphasized the commitment made by the U.S. government to ensure GPS signals are available to all users, and I shared some of our excitement in the GPS Directorate regarding the modernized capabilities we are developing and fielding. This year I’d like to share with you progress we’ve made in the past 12 months, provide an update on the modernization initiatives, and challenge civil users and receiver companies to innovate and accelerate these modernized capabilities for users worldwide. read more

Latest Words from the Acquisition Guru of the World’s Gold Standard for PNT

September 1, 2014By
Col. William Cooley, Director, U.S.A.F. Global Positioning Systems Directorate.

Colonel William “Wild Bill” Cooley, director of the GPS Directorate at Space and Missile Systems Center, discusses CNAV signals, GPS IIF launches, and the OCX with Defense Editor Don Jewell. There is probably no busier United States Air Force officer than Colonel William “Wild Bill” Cooley, Ph.D., the director of the GPS Directorate at Space and Missile Systems Center (SMC),... read more

The System: Sixth GPS IIF Launched into Orbit

June 1, 2014By
Photo credit: United Launch Alliance.

A sixth GPS IIF satellite was launched aboard a United Launch Alliance Delta 4 rocket from Cape Canaveral at 8:08 p.m. EDT May 16. The satellite, designated GPS IIF-6 and built by Boeing, is one of the next-generation GPS satellites, incorporating improvements to provide greater accuracy, increased signals, and enhanced performance for users. According to Boeing, each GPS IIF satellite... read more

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