Global Navigation Satellite Systems Engineering, Policy, and Design
Problems with a navigation payload on a recently launched GLONASS-M satellite appear to have become a greater cause for concern for Russian Federal Space Agency (Roskosmos) than previously expected, leading to a further delay in a scheduled September 25 launch until next February.
By Inside GNSS
DataGrid, Inc. has released the third generation of its programmable DGRx-GNSS receiver for OEM integrators as well as a high-sensitivity mode for DGRx-GNSS that allows the receiver to track the L1 and L2C codes transmitted by GPS and GLONASS satellites down to a signal level of only 15 dB-Hz.
By Inside GNSS
NovAtel OEMStarNovAtel Inc. rolled out a series of new products and a firmware upgrade at the Institute of Navigation’s ION GNSS 2009 conference held September 22-25 in Savannah, Georgia, USA.
The Calgary, Alberta, Canada–based GNSS manufacturer announced the launch of their new single-frequency GNSS receiver, OEMStar. The low-cost, 14-channel, L1 receiver measures 46 x 71 millimeters and consumes just 750 milliwatts of power when tracking both GPS and GLONASS signals.
By Inside GNSS
Septentrio AsteRx2eHSeptentrio has launched AsteRxi, the company’s first multi-sensor GNSS receiver as well as the AsteRx2eH, a single-board dual-frequency dual-antenna GPS/GLONASS heading receiver, specially designed for demanding machine control, marine survey, photogrammetry and other multi-antenna applications.
By Inside GNSS
GLONASS Launch, September 25, 2008A problem caused by the signal generator in an on-orbit GLONASS-M satellite (#726) led the Russian space agency (Roscosmos) officials to delay a scheduled September 25 launch of three new spacecraft.
Sergey Revnivykh, deputy director general of Roscosmos’s Central Research Institute of Machine Building, told Inside GNSS today (September 30) that the agency has set up a task force that includes Revnivykh to investigate the problem with the on-orbit satellite and to ensure that the new spacecraft are free of similar technical difficulties.
By Inside GNSS
GLONASS-K spacecraft (artist’s illustration)With a nearly restored and modernizing GLONASS system beginning to make inroads into mass market products and services, Russia has revealed plans to build out a space-based augmentation system (SBAS) and establish its first ground monitoring stations outside the Russian territory.
In a July 30 presentation at an International Committee on GNSS (ICG) working group on interoperability, Dmitry Marareskul, head of the onboard satellite navigation sector of Information Satellite System Reshetnev Corporation in Zheleznogorsk, revealed Russia’s plans to expand its network of GLONASS monitoring and measuring stations to include sites in Australia, Cuba, and South America.
By Inside GNSS
Spirent Communications plc has launched the GSS6300 Multi-GNSS Signal Generator, intended for high-volume production test applications for devices that use commercial GPS/SBAS, GLONASS, and/or Galileo receivers.
The GSSS6300 provides a comprehensive remote control interface, designed to facilitate integration into automated test equipment (ATE) environments.
By Inside GNSS
Spirent Communications has launched its GSS6700 Multi-GNSS Constellation Simulator with test test capability GPS, GLONASS, and the planned European Galileo system.
By Inside GNSS
Block IIR Satellite L-Band Transmitter Array of 12 Helical Antennas. Lockheed Martin photo.After GPS Wing engineers and contractors figure out how to solve the elevation-dependent signal anomalies on the latest GPS satellite — Space Vehicle Number 49 (SVN49), they may want to take a look at another nine Block IIR and IIR-M spacecraft that European scientists say exhibit similar, but less severe, behavior.
In an article that will appear in the July/August issue of Inside GNSS, Tim Springer and Florian Dilssner, GNSS engineers in the Navigation Support Office of the European Space Operations Center (ESOC), described the effects of the anomaly as well as the U.S. Air Force’s initial attempts to solve the problem by altering the broadcast satellite orbital positions and time. A version of the article was posted June 25 on the magazine’s website.
By Inside GNSS
GPS Networking, of Pueblo, Colorado, has launched the VGLCDLA30RPDC, a variable gain GPS in-line amplifier with LCD display and push button control.
Featuring a range of 0–30 dB, the VGLCDLA30RPDC’s push button control can increase or decrease gain in increments of 1 dB, enabling operators to make precise adjustments quickly and view the output power at any given time for more efficient testing.
The unit operates on 110VAC or 220 VAC transformer (wall mount) and 240 VAC (United Kingdom). Connector options include types N, SMA, TNC, and BNC.
By Inside GNSS
The Radio Technical Commission for Maritime Services (RTCM) has completed a revision (Version 2.0) of its standard for Networked Transport of RTCM via Internet Protocol (Ntrip).
Designated as RTCM Standard 10410.1, Among other things, the new standard defined by RTCM’s Special Committee 104 (SC104) provides a protocol for streaming differential correction data or other kinds of Global Navigation Satellite System (GNSS) data to stationary or mobile users over the Internet.
By Inside GNSS
Applanix
has introduced the POSTrack 410 flight management and direct
georeferencing system designed for use with the latest generation of
medium-format airborne digital photogrammetric camera.
The POSTrack 410 incorporates Applanix’s POS AV GNSS-inertial navigation
system (INS) and POSPac Mobile Mapping Suite (MMS) office software,
featuring the IN-Fusion technology and SmartBase module. This system
can process both GPS and GLONASS signals as well as those from
satellite-based augmentation systems.
The 17th International Conference on Integrated Navigation Systems will take place in St. Petersburg, Russia from May 25 to May 27, 2009.
The annual event has become a traditional meeting place for scientists and engineers involved in navigation, motion control and guidance for land, aerospace and marine civil applications.
The leader of the conference working group is Margarita V. Grishina.
The conference is organized by Elektropribor, the state research center of Russia.
By Inside GNSS
