Russia's satellite navigation system, delivering global positioning and timing data. Operates on FDMA signals, with standard accuracy of 5–10 m, improvable to sub-meter with differential corrections. Used in transportation, geodesy, and military applications for reliable navigation.

A satellite-based navigation system providing position, velocity, and time data via trilateration. Uses signals from at least four satellites to compute coordinates in WGS-84, with standard positioning accuracy of 5–10 m and differential methods (e.g., DGPS) achieving 10–20 cm. Primary GNSS applications include vehicle navigation, surveying, and time synchronization.

A geodetic reference system used by GLONASS, defining Earth's ellipsoid and coordinate framework. Offers comparable accuracy to WGS-84, typically within 1–2 m for positioning. Applied in Russian navigation systems and geospatial data integration.

A global reference system defining Earth's shape, orientation, and gravity field for GNSS positioning. Provides a consistent coordinate framework with sub-meter accuracy for GPS and other systems. Widely used in mapping, navigation, and geospatial analysis.

A computer system for processing and analyzing GNSS data, integrating navigation parameters and corrections. Supports real-time or post-processing tasks with accuracy dependent on input data quality (e.g., 1–10 m for standard GNSS). Used in control centers for navigation system management and data visualization.

A device receiving GNSS satellite signals, critical for accurate pseudorange and carrier-phase measurements. Sensitivity and placement affect signal quality, yielding positioning accuracy from meters to centimeters. Used in navigation receivers for vehicles, surveying, and mobile applications.

A ground-based station providing differential corrections to improve GNSS accuracy. Transmits data like DCI to achieve sub-meter to centimeter precision. Essential for DGPS and RTK applications in navigation and surveying.

A facility monitoring and managing GNSS satellite constellations and ground infrastructure. Ensures signal integrity and accuracy, typically maintaining positioning errors below 1–2 m. Used for system-wide navigation control and data processing.

A local coordinate system with axes pointing East, North, and Up from a reference point. Provides intuitive coordinates for local GNSS applications with 1–5 m accuracy. Used in surveying, robotics, and local navigation where geographic orientation is important.

A system overseeing GNSS operations, including satellite health, orbit corrections, and data dissemination. Maintains positioning accuracy within 1–5 m for standard applications. Used in mission control for GNSS reliability and performance.

A device processing GNSS signals to compute position, velocity, and time. Achieves 5–10 m accuracy in standard mode, improvable with corrections. Used in automotive, aviation, and personal navigation devices.

Onboard satellite equipment transmitting GNSS signals, including clocks and antennas. Ensures signal stability for positioning accuracy of 1–10 m. Critical for GNSS constellation functionality in navigation applications.

A comprehensive system integrating GNSS receivers, corrections, and algorithms for positioning. Provides accuracy from 5 m (SPP) to centimeters (RTK/PPP). Used in transportation, surveying, and autonomous systems.

A localized station monitoring GNSS signal quality and providing regional corrections. Enhances accuracy to sub-meter levels for nearby users. Used in regional navigation networks and surveying.

A structured storage system for GNSS data, including ephemeris, measurements, and corrections. Supports post-processing for accuracies from meters to centimeters. Used in navigation analysis, geodesy, and research.

Data correcting GNSS pseudorange errors due to atmospheric or clock inaccuracies. Improves positioning to sub-meter or centimeter levels. Used in DGPS, RTK, and marine navigation systems.

Digital data formats (e.g., binary or text) used in GNSS for transmitting measurements or corrections. Ensures compatibility across systems, supporting accuracies from 1–10 m. Used in data exchange for navigation processing.

A parameter indicating the version of GNSS ephemeris or clock data. Ensures receivers use current data for 1–5 m accuracy. Critical for navigation reliability in real-time applications.

Data collected by GNSS receivers, including pseudorange, carrier phase, and Doppler measurements. Provides raw inputs for positioning with accuracies from 1–10 m, enhanced by corrections. Used in navigation, surveying, and post-processing applications.

A correction applied to GNSS pseudorange measurements to mitigate errors from clock biases or atmospheric delays. Improves accuracy to sub-meter levels in differential GNSS. Used in DGPS and RTK for precise navigation.

A correction for the rate of change in pseudorange, addressing Doppler shift and satellite motion. Enhances velocity accuracy to 0.1–0.5 m/s in GNSS systems. Applied in dynamic navigation like aviation and automotive.

A protocol for transmitting differential GNSS corrections, supporting formats for pseudorange and carrier-phase data. Enables sub-meter to centimeter accuracy. Used in marine navigation, RTK, and DGPS systems.

Up-to-date satellite ephemeris and clock data used for GNSS positioning. Ensures accuracy within 1–5 m by providing precise orbital information. Critical for real-time navigation and surveying applications.

A metric indicating the accuracy of differential GNSS corrections for a satellite. Typically expressed in meters (e.g., 0.1–1 m), it guides users in assessing correction reliability. Used in SBAS and DGPS for navigation accuracy.

An index quantifying the reliability of differential corrections for a satellite. Guides users on correction quality, supporting sub-meter accuracy in GNSS. Used in SBAS and DGPS for navigation precision.

Time delay in GNSS signal propagation due to hardware or ionospheric effects. Impacts pseudorange accuracy, typically corrected to maintain 1–5 m precision. Used in signal processing for navigation systems.

A GNSS method using precise satellite orbit and clock data for positioning without a local base station. Achieves 10–20 cm accuracy after convergence. Used in remote surveying, marine navigation, and scientific applications.

A standardized data format for exchanging raw GNSS observation data (pseudorange, carrier phase). Enables post-processing for high-precision applications, supporting accuracies from meters to centimeters. Used in geodesy and scientific research.

A statistical measure of error magnitude in GNSS positioning, reflecting deviations from true values. Typical RMS errors for standard GNSS are 1–5 m, reduced to centimeters with RTK or PPP. Used to evaluate system performance in navigation.

A GNSS technique using carrier-phase measurements for centimeter-level positioning accuracy (1–2 cm). Relies on a base station providing real-time corrections to a rover. Applied in precision agriculture, construction, and surveying.

A measure of GNSS signal strength relative to interference. Higher ratios (e.g., >20 dB) ensure reliable positioning with 1–10 m accuracy. Used in receiver design and signal quality assessment.

A ratio comparing GNSS signal power to background noise. High S/N (e.g., >30 dB) supports accurate pseudorange measurements (1–5 m). Critical for receiver performance in navigation and surveying.

A GNSS method using pseudorange data without corrections, achieving 5–10 m accuracy. Relies on satellite ephemeris and clock data. Used in basic navigation for vehicles and consumer devices.

A metric signaling interruptions in GNSS signal tracking. Impacts reliability, potentially degrading accuracy to >10 m during outages. Used in aviation and safety-critical navigation systems.

The rate of change of a satellite's orbital inclination, affecting ephemeris accuracy. Contributes to positioning errors of 1–2 m if uncorrected. Used in orbit modeling for GNSS navigation.

The rate of change of a satellite's orbital node, impacting GNSS ephemeris accuracy. Uncorrected, it contributes to positioning errors of 1–2 m. Used in orbit determination for precise navigation calculations.

A metric quantifying the geometric quality of satellite configuration for positioning accuracy. Lower PDOP values (e.g., <3) indicate better accuracy, typically 2–5 m for standard GNSS. Used to assess reliability in navigation and surveying.

Pseudorange derived from the Coarse/Acquisition code on L1 frequency. Provides standard GNSS accuracy of 5–10 m, suitable for basic positioning. Used in consumer devices and navigation systems.

Pseudorange measured with the Precise code on L1 frequency. Offers improved accuracy (1–5 m) over C/A code due to higher chip rate. Used in military and high-precision GNSS applications.

Pseudorange derived from the Precise code on L2 frequency, enabling dual-frequency corrections. Achieves 1–5 m accuracy, enhanced to centimeters with RTK. Used in surveying and geodesy.

Pseudovelocity derived from Doppler shift of the C/A-code carrier on L1. Provides velocity accuracy of 0.1–0.5 m/s. Used in dynamic navigation for vehicles and aviation.

Pseudovelocity from the P-code carrier on L1, offering 0.05–0.2 m/s accuracy. Supports high-precision velocity estimation in GNSS. Used in military and scientific applications.

Pseudovelocity from the P-code carrier on L2, enabling dual-frequency velocity corrections. Achieves 0.05–0.2 m/s accuracy. Used in precision navigation and geophysical monitoring.

A GNSS satellite transmitting navigation signals, including ephemeris and timing data. Ensures positioning accuracy of 1–10 m, depending on corrections. Core component for GNSS navigation and timing.

The cumulative signal delay from satellite hardware and ionospheric effects. Corrected to maintain 1–5 m positioning accuracy in GNSS. Used in signal processing for navigation reliability.

Carrier-phase measurement on L1 frequency, used for high-precision GNSS. Achieves centimeter-level accuracy with RTK or PPP. Applied in surveying and geodetic monitoring.

Carrier-phase measurement on L2 frequency, enabling dual-frequency ionospheric corrections. Provides centimeter accuracy in RTK or PPP. Used in precision surveying and scientific applications.

A network distributing GNSS data or correction streams to users. Ensures low-latency data access, supporting 1–10 m accuracy in real-time applications. Used in navigation and data services.

A JavaScript library for creating interactive charts and graphs to visualize GNSS data. Supports plotting positioning accuracy, signal strength, and navigation parameters. Used in web-based GNSS analysis tools and dashboards for data presentation.

A coordinate system fixed to Earth's surface for GNSS positioning. Provides global reference for coordinates with 1–5 m accuracy. Used in navigation, mapping, and geospatial analysis.

A format for storing GNSS receiver measurements, including pseudorange and phase data. Supports post-processing for 1–10 m accuracy. Used in navigation and geodetic applications.

The smallest unit of digital data in GNSS signal processing, affecting data precision. Impacts measurement resolution, contributing to positioning accuracy of 1–5 m. Used in encoding navigation messages and receiver data processing.

A time reference system synchronized with GNSS satellite clocks for accurate timing. Ensures time accuracy within nanoseconds, supporting 1–5 m positioning precision. Used in navigation and telecommunications synchronization.

A numerical method for solving differential equations in GNSS orbit and clock modeling. Provides high accuracy for satellite trajectory predictions, supporting 1–2 m positioning. Used in ephemeris calculations and navigation processing.

A standard for GNSS data formats and correction messages, like RTCM SC-104. Enables sub-meter to centimeter accuracy in differential GNSS. Used in marine navigation, RTK, and DGPS systems.

Programs processing GNSS data for positioning, corrections, or analysis. Supports accuracies from 1–10 m, depending on algorithms and inputs. Used in receivers, control centers, and navigation applications.

A data format for GNSS receiver measurements, including pseudorange and carrier-phase. Supports post-processing for 1–10 m accuracy. Used in navigation, surveying, and multi-path correction applications.