T920 High-Precision Satellite Common View Receiver

Multi-system high-precision satellite common view receiver

The core synchronization benchmark for national time service, metrology comparison and scientific research time and frequency systems

High-precision satellite common view time transfer solution

The T920 high-precision satellite common-view receiver simultaneously receives signals from multiple systems, including GPS, GLONASS, BeiDou, and Galileo, and outputs high-precision code and carrier phase observations in compliance with CCTF (2015) and CGGTTS V2E standards. It supports OSNMA enhanced signal authentication, AIM+ interference mitigation, and APME+ multipath estimation technologies, and provides data in multiple formats, including RINEX, BINEX, SBF, and RTCM, along with 16 GB of local storage. It outputs precise 1 PPS, 10 MHz, NTP, and PTP reference signals, and supports PPS, 10 MHz, NTP, and PTP accuracy assessment and testing. Remote monitoring and configuration are enabled via a web interface.

Applicable fields: international time comparison, metrology laboratories, scientific research institutions and enhanced navigation applications

Important Features

Full GNSS satellite system multi-band reception
Meet CCTF standards to achieve ultra-precise time and frequency comparison
Compliant with CGGTTS V2E standard
Compatible with Galileo OSNMA to improve data security
AIM+ and APME+ technologies reduce interference and multipath errors
Web remote monitoring and rugged design for harsh environments
Support NTP, PTP first-level clock synchronization, detection, evaluation and calibration

Application Scenario

National Time Service Center

Support for UTC(k) implementation

Submit commonview data in CGGTTS format to the International Bureau of Weights and Measures (BIPM)

Constructing a relative time difference reference between multiple cesium/hydrogen clocks

Metrology laboratory and high-precision time and frequency calibration system

High-stability crystal oscillator or atomic clock for calibration experiments Maintain nanosecond-level time synchronization with the main laboratory Output RINEX/CGGTTS/UTC difference report

Timing redundancy system for high-security scenarios

The common view path serves as a redundant bypass for the primary GNSS path. Can form a safety net with solutions such as PTP, NTP, and ePRTC. Access to AIM+ interference monitoring and OSNMA signal authentication mechanisms.

Research Projects

Ensures traceability and verifiability of time bases for multiple devices or nodes. Provides high-precision timestamp and co-parallax analysis support. Participates in time-frequency link accuracy experiments or simulations.

Performance Indicators

Functional modules	Parameter items	Indicator/Description
GNSS technology	Tracking Channel	544 hardware channels, capable of simultaneously tracking all visible satellite signals for L1 and L2 P-code traces, as well as some CA-P signals for dual-frequency tracking of L2C (GPS)
	Measurement data output	Data output rates (code, carrier, navigation data) up to 100 Hz selectable
	Anti-interference	Unique anti-jamming system for detecting, marking and mitigating common strong jammers. Signal suppression (jamming) and spoofing are controlled
	Multipath Mitigation	Backend multipath estimator for sensing the multipath effects of multiple wave paths. All multipath suppression and evaluation algorithms are freely configurable.
Supported data formats	CGGTTS V2E	Available on devices and PC
	RINEX	obs, nav, meteo) V2.x, 3.05, 4.00
	BINEX
	NMEA V2.30 和 V4.10 output
	RTCM output	Supports all MSM messages
	Standard 16 GB data storage
	Up to 48 heartbeat tasks can be performed simultaneously	8 independent sessions × 6 data formats
Connection characteristics	Detection Input	High-precision NTP, PTP synchronization services and input detection and evaluation functions
	Reference input
	1 PPS input (with detection function)
	Multiple PPS outputs (up to 100 Hz)
	10 MHz reference output
	4 high-speed serial ports
	1 Ethernet management port (100 Mbps)
	Integrated WiFi (802.11 b/g/n)
	1 full-speed USB port
	1 USB host port for connecting external storage devices
	Support HTTP/HTTPS access
	Provides advanced web UI	Provides authorization control and status monitoring, and has a lightweight Web UI for low-bandwidth environments
	Built-in FTP server, FTP connection, SFTP, SYNC+, CloudUIT functions
	Supports NTRIP (v1 and v2) clients, servers, and forwarders
	Support point-to-point communication protocol
Measurement accuracy	Code carrier noise	0 by design
	Frequency code deviation	< 10 ns
	System deviation in normal mode	< 2 ns
	Code measurement	< 0.5 ns
	Phase measurement	< 5 ps
	PPS delay calibration	20 ps
	NTP measurement accuracy	50 us
	PTP measurement accuracy	10 ns
Time accuracy	1 PPS output jitter	5 ns
	1 PPS output rising edge time	< 2 ns
	Events	20 ns
	NTP synchronization accuracy	50 us
	PTP synchronization accuracy	10 ns
	IRIG-B DC synchronization accuracy	10 ns