Global Navigation Satellite Systems Engineering, Policy, and Design
Boeing Integrated Defense Systems has awarded GPS Source, Inc., of Pueblo West, Colorado, a multimillion dollar contract for the development of GPS retransmission equipment for the C-17 Globemaster III.
A screen in the Galileo control room displays the spectra of signals received from GIOVE-B shortly after the spacecraft began transmitting navigation signals. ESA photo.Europe’s second Galileo In-Orbit Validation Element (GIOVE-B) satellite began transmitting navigation signals on May 7, including the common GPS-Galileo civil signal MBOC (multiplexed binary offset carrier).
Built under a cooperation between the European Space Agency (ESA) and European Union (EU), GIOVE-B was launched April 27 from the Baikonur cosmodrome in Kazakhstan. The MBOC signal design will be used by the future GPS L1C broadcasts as well as the Galileo Open Service in accordance with an agreement drawn up in July 2007 between the EU and the United States.
Locked to an on-board passive hydrogen maser clock, the GIOVE-B signals will help improve positioning accuracy in challenging environments with multipath and interference as well as better penetration for indoor navigation.
By Inside GNSS
CNS-5000NovAtel, Inc., and KVH Industries took advantage of the auspicious occasion of the PLANS 2008 conference to launch their separately labeled but common-design versions of a GNSS/fiberoptic gyro (FOG) inertial measurement unit (IMU) sensor.
By Inside GNSS
Applanix has announced the availability of a high altitude tactical mapping option for its DSS RapidOrtho system as well as the integration of the Trimble BD960 GNSS receiver module for its POS AV airborne position and orientation system.
With the GNSS module, POS AV products now support GPS L1/L2 and GLONASS L1/L2 processing, both in real-time and post-mission. The BD960 will also be able to receive and process the next-generation GPS L2C and L5 signals.
By Inside GNSS
Hemisphere GPS has reported US$25.9 million in revenues for the first quarter of 2008, an increase of 56 percent from the year-earlier period (US$16.7 million) and a record for the company.
The company also reported record first quarter net income of $5.8 million, or $0.11, an increase of 169 percent compared to $2.2 million, or $0.05 per share, in the first quarter of 2007.
By Glen Gibbons
Spectrum Control, Inc., of Fairview, Pennsylvania, has designed a new single-element patch antenna that can receive and/or transmit two frequency bands — GPS and satellite communications — in one package.
The new antennas were developed for GPS applications using either Globalstar, for telephone and low-speed data communications, or Iridium’s voice and data communications. The frequencies cover 1575MHz (GPS) to 1615MHz (Globalstar) and 1575MHz (GPS) to 1621MHz (Iridium).
By Glen Gibbons
As speculated might occur, Lockheed Martin has joined the Northrop Grumman Corporation team competing for the GPS Next Generation Control Segment (OCX) Phase B contract. Lockheed had led its own team in the first round of competition that ended last November.
With Boeing as part of the other prospective OCX team headed by Raytheon Corporation, both companies with experience operating the GPS ground-based infrastructure are playing supporting roles for the contest to build the new control system.
By Glen Gibbons
Passage of a new regulation on Galileo sets the stage for the next phase of the €3.4-billion satellite navigation system’s development under a public procurement but leaves many details to be worked out among the key players: the European Commission (EC), the European Council, the European Parliament, and the European Space Agency (ESA).
Meeting in Strasbourg, France, the parliament adopted the measure on April 22 with 607 votes in favor, 36 votes against, and 8 abstentions.
“Things are looking up, finally, for the European GNSS programs,” Paul Verhoef, head of the Galileo unit in the EC’s Directorate-General for Transport and Energy, told an April 23 plenary session of the European Navigation Conference 2008 in Toulouse, France.
By Glen Gibbons
The European Space Agency has extended until May 16 the deadline for paper abstracts for oral and poster presentations for NAVITEC 2008, ESA’s fourth workshop on satellite navigation user equipment technologies.
This year’s theme is "GNSS User Technologies in the Sensor Fusion Era." Galileo receiver technologies and experimentation are a special focus of this year’s event.
The workshop will take place from December 10-12 at the European Space and Technology Centre in Noordwijk, The Netherlands.
By Inside GNSS
Spirent Communications plc has announced that the Spirent UMTS Location Test System (ULTS) now supports full certification testing of 3G Partnership Project’s (3GPP) Assisted GPS (A-GPS) RF Minimum Performance test cases for both W-CDMA and GSM devices. With this latest capability, Spirent test equipment can support all A-GPS testing standards including RF performance, signaling conformance, and Secure User Plane (SUPL) Application Enabler, according to the company.
By Glen Gibbons
Santa Clara, California–based wireless/wired communications semiconductor manufacturer Atheros Communications, Inc., which acquired u-Nav Microelectronics last December, has announced its second-generation, single-chip GPS receiver, the AR1511, and companion ORION 3.0 software suite.
By Glen Gibbons
Nearly 30 years after the first launch of a GLONASS spacecraft, Russia is moving to add code division multiple access (CDMA) signals to the frequency division multiple access (FDMA) format that has set the world’s second-oldest global satellite navigation system apart from GPS and other systems under development.
A February 15, 2008, government decree on new GLONASS requirements calls for open CDMA signals with a binary offset carrier or BOC (2,2) signal structure centered at 1575.42 MHz and a BOC (4,4) signal centered at 1176.45 MHz — essentially corresponding to the center points of GPS signals at the L1 and L5 frequencies and nearby Galileo and Compass signals.
An additional GLONASS FDMA signal will be located at L3 frequencies (1197.648–1212.255 MHz), just below the GPS M-code at L2.
Russia will implement the new signals on the next-generation GLONASS-K satellites, with the first launch currently expected in late 2010 with flight testing the following year.
By Glen Gibbons
Close up view of the payload fairing of the Soyuz-Fregat launcher carrying ESA’s GIOVE-B satellite, on the launch pad in Baikonur, Kazakhstan, prior to the April 27, 2008, launch. ESA photo by S. CorvajaA new generation of GNSS signals will become available soon as Europe’s second Galileo In-Orbit Validation Element satellite (GIOVE-B) reached orbit, following successful launch on Sunday (April 27) from the Baikonur cosmodrome in Kazakhstan.
Riding a Soyuz/Fregat launcher, the 500-kilogram (1,100-pound) spacecraft lifted off at 12:16 a.m. Central European Summer Time (CEST). The Fregat upper stage performed a series of maneuvers to reach a circular orbit at an altitude of about 23,200 kilometers inclined at 56 degrees to the equator. The two solar panels that generate electricity to power the spacecraft deployed correctly and were fully operational by 5:28 CEST.
The European space Agency (ESA) operational schedule called for Galileo signals at three L-band frequencies to begin transmitting within seven to eight hours after reaching orbit, according to Giuseppe Viriglio, ESA’s director of telecommunications and navigation.
By Glen Gibbons
