Read a roundup of recent products in the GNSS and inertial positioning industry from the June 2025 issue of GPS World magazine.
MOBILE
Mobile Clock Generators
With an integrated MEMS resonator
SiTime’s Symphonic is a mobile clock generator built around the SiT30100, which integrates a MEMS resonator and a temperature sensor in a compact 2.22 mm² chip. Designed for 5G and GNSS chipsets, Symphonic delivers precise, resilient clock signals while supporting efficient power consumption in mobile and IoT devices, including smartphones, tablets, laptops and asset trackers.
The integrated temperature sensor feeds data to compensation algorithms, providing frequency stability as low as ±0.5 parts per million to enhance GPS accuracy and shorten lock times, which is critical for reliable performance in challenging environments. The device operates across a -30°C to 90°C temperature range and is engineered for dynamic stability and power optimization, helping to mitigate electromagnetic interference. Symphonic features four configurable clock outputs, each capable of delivering 76.8 MHz, 38.4 MHz or 19.2 MHz, suitable for baseband, radio frequency and GNSS applications. The single-chip design eliminates the need for external resonators.
Dual-Band L1/L5 Antenna
For critical positioning and timing applications
The TW3885TL is a dual-band GNSS antenna engineered to deliver reliable, interference-free signal reception for critical positioning and timing applications. Supporting both L1 and L5 frequency bands, the antenna is compatible with a wide range of global navigation satellite systems, including GPS, QZSS, Galileo, BeiDou, GLONASS and NavIC, as well as regional satellite-based augmentation systems.
The TW3885TL incorporates advanced filtering technology designed to reduce interference from crowded radio frequency environments. It features a low-noise preamplifier, with a typical noise figure of less than 2.5 dB, and offers high gain, typically around 40 dB. The antenna maintains a low axial ratio, under 2.0 dB, and exhibits tight phase center variation, which contributes to precise timing and superior signal quality. Constructed with a weatherproof enclosure rated to IP69K, the TW3885TL is suitable for permanent outdoor installations and can be mounted through-hole, with optional accessories available to support various mounting configurations.
UAV
Software Upgrades
Enable positioning in GNSS-denied environments
eBee VISION application software now includes a suite of updates for UAV navigation in environments where GNSS signals are compromised or unavailable. The latest software enables autonomous position updates with map referencing, allowing for precise navigation even when satellite signals are jammed, spoofed or blocked. This product is suitable for defense personnel, public safety agencies, and industrial teams working in high-stakes environments where GNSS signals are unavailable (densely populated urban areas, near critical infrastructure, or in contested zones with active interference). The update introduces optical flow stabilization for target lock, which uses visual cues to keep the camera centered on a point of interest during zoom-ins or drone movement. The software allows for adaptive behavior after GNSS recovery or visual repositioning. Additional enhancements include real-time mission duration and return-to-home estimates, optimized cruise speed in windy conditions, high-precision landings using lidar-based altitude calibration, a gimbal auto-recovery mechanism to clear obstructions mid-flight, and smart motor speed reduction to prevent overheating during extreme conditions.
AgEagle Aerial Systems, ageagle.com
IMU
For unmanned commercial and defense applications
The IMU-H100 is a micro-electromechanical systems inertial measurement unit (IMU) designed to improve tactical guidance and navigation for UAVs, short-range missiles, precision-guided munitions, and a range of commercial applications.
The tactical-grade unit features accelerometers and gyroscopes on all three axes. It offers a gyro bias of 1° per hour and an accelerometer bias of 1 mg. The unit measures 5 in³ and weighs 160 g. The IMU-H100 surpasses comparable products in data rate, measurement range, stability and repeatability, even under challenging conditions such as vibration, shock, high acceleration, spinning, temperature changes and acoustic noise.
