Global Navigation Satellite Systems Engineering, Policy, and Design
L-3 Interstate Electronics Corporation (IEC), based in Anaheim, California, The miniaturized the TruTrak Evolution GPS receiver from L-3 Interstate Electronics is a single-board, L1/L2 24-channel secure GPS receiver, measuring 1.8 x 2.0 x 0.4 inches. It consists of a security module, radio frequency down converter, and I/O logic.
By Glen Gibbons
NovAtel, Inc., has announced its new flagship GNSS + INS receiver, the SPAN-SE. NovAtel’s SPAN (Synchronous Position, Attitude and Navigation)
single- or dual-frequency technology tightly couples two complementary technologies: GNSS
National Instruments offers the NI GPS Toolkit for LabVIEW, an extension of the graphical system design environment that expands the NI RF PXI platform to include multi-satellite GPS signal simulation. Using NI LabVIEW software to create waveforms that simulate up to 12 satellites (C/A codes in the L1 band), engineers can test receiver characteristics such as sensitivity, time to first fix (TTFF) and position accuracy with the NI PXIe-5672 RF vector signal generator.
By Glen Gibbons
Raven Industries offers the GPS FiberLink, a fiber-optic cable designed to pass GPS L1/L2 frequencies over distances up to 610 meters (2,000 feet). According to the company, the product will accommodate future expansions of GPS signals, given its coverage of frequencies ranging from 800 MHz up to 1800 MHz, while provide protection from lightning strikes. The unit will operate on 12V to 36V AC or DC power sources.
By Glen Gibbons
Atheros Communications offers the AR1511, a 44-channel GPS receiver-on-chip solution, consisting of the CMOS AR1511 GPS IC teamed with the ORION v3.0 multi-mode navigation software. It is comprised of a single-conversion RF front-end and a GPS baseband processor combined on a single die. The L1 RF front-end includes an on-chip low noise amplifier (LNA), and a configurable phase-locked loop (PLL) that supports six (6) TCXO frequencies.
By Glen Gibbons
NovAtel introduces its GNSS-750 choke ring antenna with a 3D design that enables low-level elevation tracking and the ability to track satellites as soon as they are visible, down to the horizon and even below. It incorporates an ultra-wideband Dorne-Margolin element and has optimized antenna gain so it can be used with most manufacturers’ geodetic receivers. The GNSS-750 tracks all four GNSS constellations (GPS, GLONASS, Galileo, Compass) and their signals, including SBAS and L-Band signals for differential services. The unit measures 380 mm x 200 millimeters and weighs 7.6 kilograms.
By Glen Gibbons
The IT2200B is part of the Rakon Integrated 2200 series of surface mount device (SMD) temperature compensated crystal oscillators (TCXOs), which can be used to aid GPS weak signal detection in portable devices. Measuring 2.5 x 2.0 millimeters, the IT2200B employs an analog integrated circuit for the oscillator and temperature compensation. The RSX-10 crystal is surface mounted on top of the ceramic IC carrier. The segregation of the crystal from the oscillator further improves the reliability of the product. Frequencies ranging from 10 to 45 MHz.
By Glen Gibbons
The Trimble BD960 GNSS system is a multi-channel, multi-frequency, OEM GNSS receiver, in a Eurocard form factor measuring 100 x 106.7 x 12.7 millimeters. The centimeter-level positioning technology is designed to ease product and system development by original equipment manufacturers. It includes 72 channels for GPS L1, L2C, and L5 code and carrier signal tracking and four additional channels for satellite-based WAAS/EGNOS/MSAS support and three levels of OmniSTAR L-band services.
By Glen Gibbons
Suntsu Frequency Control, Inc. offers the SGPS2 series GPS- disciplined frequency and time standard. Combining a Furuno 16-channel GPS receiver and Suntsu’s own oven controlled crystal oscillator (OCXO) technology in a 2 x 2 x 1.25 inches (50.8 x 50.8 x 31.75 millimeters) package, the entire unit is mountable on printed circuit boards with a micro-miniature connector (MMCX) antenna connection on the side. The OCXO frequency is disciplined with timing signals from GPS satellites to maintain frequency accuracy to <1×10-12 in 24 hours.
By Glen Gibbons
Pendulum Instruments, an Orolia Group company, offers the GPS-12RG, a combined GPS and GLONASS controlled frequency standard. This portable (weight, 3.1 kilograms) reference clock is designed for laboratory and telecommunications applications and can trace its operation to both GPS and GLONASS satellites. An internal rubidium oscillator provides stability of a few parts in 10-12, also in hold-over operation in cases when satellite contact is lost, according to the company.
By Glen Gibbons
Spirent’s new GSS8000 series GNSS Constellation Simulator enable users to integrate up to three GNSS constellations in a single simulator, including combinations of GPS (L1, L2, L5), Galileo (E1, E5ab, E6), GLONASS (L1, L2), and satellite-based augmentation systems or SBAS (L1, L5). In the future, GSS8000 architecture will also support QZSS, Compass/Beidou, and GLONASS L3, according to the company.
By Glen Gibbons
KDS Daishinku Corporation offers a new version of temperature compensated crystal oscillator (TCXO) for GPS-related applications — the DSB321SDA/DSB221SDA. KDS Daishinku currently produces a high-precision surface mount device (SMD) TCXO, DSB321SD. With the new TCXO, phase noise performance of the output signal has improved to a typical figure of 94dBc/Hz at10Hz and -117dBc/Hz at100Hz with an output frequency 16.369MHz while retaining the DSB321SD’s frequency temperature stability of ±0.5ppm at -30C to +85C, according to the company.
By Glen Gibbons
