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Navigate the World with GNSS
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Navigate the World with GNSS

What is a GNSS?

GNSS (ระบบดาวเทียมนำทางทั่วโลก) enables precise global positioning, การนำทาง, and timing through satellite constellations like GPS, กาลิเลโอ, โกลนาส, and BeiDou. From daily navigation to industrial automation, GNSS delivers meter-level accuracy, operates 24/7, and supports critical infrastructure worldwide. According to Yahoo Finance, the Global Navigation Satellite System (GNSS) market reached USD 223.64 พันล้านใน 2023 and is projected to grow to USD 541.78 พันล้านโดย 2032. The market for GNSS devices and related services is also expected to expand significantly during this period.
What is a GNSS
GNSS Constellations

GNSS Constellations

A GNSS constellation comprises satellites deployed in precise orbits to deliver global positioning, การนำทาง, and timing (PNT) services. The major global GNSS constellations include:
  • • GPS (สหรัฐอเมริกา)
  • • GLONASS (รัสเซีย)
  • • Galileo (European Union)
  • • BeiDou (จีน)
  • • IRNSS/NavIC (อินเดีย)
  • • QZSS (ญี่ปุ่น)
Space Segment
Control Segment
User Segment

ระบบดาวเทียมนำทางทั่วโลก (GNSS) สถาปัตยกรรม

  • Space Segment

    Satellites in orbit continuously transmit broadcast signals containing timing, positional, and orbital data.

  • Control Segment

    Monitors and adjusts satellite operations to ensure orbital precision and time synchronization across the constellation.

  • User Segment

    Ground-based GNSS receivers (เช่น, สมาร์ทโฟน, vehicle navigation systems, เครื่องติดตาม GPS) calculate their location by processing signals from multiple satellites.

Pinpoint & Track

Stay informed about the location of assets, shipments, cargo fleets, และผู้คน.

คุณสมบัติ

GNSS Features
Global Coverage

Global Coverage

GNSS delivers worldwide signal availability, offering positioning capabilities across virtually any location on Earth — whether on land, at sea, or in the air.
ตำแหน่งที่มีความแม่นยำสูง

ตำแหน่งที่มีความแม่นยำสูง

The system achieves remarkable accuracy, typically within a few meters of error. Advanced systems can even pinpoint locations to centimeter-level precision.
Multi-Purpose Functionality

Multi-Purpose Functionality

Beyond mapping and navigation, GNSS supports critical timing applications, such as synchronizing power grids and telecommunications networks with ultra-precise timekeeping.
24/7 ความน่าเชื่อถือ

24/7 ความน่าเชื่อถือ

Unaffected by weather conditions or lighting, GNSS operates continuously and guarantees consistent performance day or night.
การติดตามแบบเรียลไทม์

การติดตามแบบเรียลไทม์

GNSS provides instant location updates, making it indispensable for navigation, การติดตามทรัพย์สิน, vehicle monitoring, and other time-sensitive applications.
Infrastructure-Free Operation

Infrastructure-Free Operation

With no need for ground-based towers or specialized hardware, GNSS offers an accessible and cost-effective solution for both personal and commercial users.

GNSS Trilateration

GNSS Trilateration works by calculating the distance between a receiver and multiple satellites. The receiver (เช่น, smart phone, เครื่องติดตาม GPS) receives signals from several satellites, each transmitting its location and the exact time the signal was sent. The receiver calculates the time it took for the signal to reach it, converting that time into distance since the signal travels at the speed of light.
อันดับแรก, the receiver calculates the distance to Satellite 1, creating a sphere of possible locations. แล้ว, it calculates the distance to Satellite 2, narrowing the location to the intersection (a circle) of two spheres.
ต่อไป, the receiver calculates the distance to Satellite 3, pinpointing its position at the intersection of three spheres. This determines the receiver’s 2D position (latitude and longitude).
To improve accuracy, a fourth satellite can be used to correct timing errors, allowing the receiver to also calculate altitude, giving it a 3D position.

IoT-based GPS Solutions for Industries

  • Fleet Management and Logistics Optimization

    GPS trackers or gateways embedded in vehicles, containers, or pallets transmit real-time location data to centralized IoT platforms, allowing companies to closely monitor routes and accurately predict delivery times. In cold chain logistics, IoT devices integrate GNSS tracking with environmental monitoring—such as temperature and humidity—to ensure perishable goods remain intact throughout transit.

  • Lone Worker Safety

    Smart GNSS-enabled personnel badges enhance lone worker safety in high-risk industries by providing real-time location tracking. Supervisors can monitor worker movements in hazardous zones, ensure compliance with safe areas, and prevent access to restricted sites. A built-in SOS alarm button allows lone workers to request help during emergencies. These badges also automate attendance, boosting both safety and efficiency in environments like construction, mining, and oil and gas.

  • Campus Safety

    Smart location badges with GPS and BLE offer real-time tracking of students and staff indoors and outdoors. Integrated RFID access control blocks unauthorized entry, while a one-click SOS button sends instant emergency alerts with the user’s exact location to security teams.

  • Shipment Visibility

    GPS trackers offer low-power, long-range container tracking using LoRaWAN and global positioning. They deliver real-time location, shock data, and geofencing alerts, ensuring secure, continuous monitoring across remote routes. With multi-year battery life and encrypted data, they help prevent cargo spoilage and theft while enhancing supply chain visibility.

คำถามที่พบบ่อย - คำถามที่พบบ่อย

  • What is difference between GPS and GNSS?

    GPS is the U.S. satellite navigation system, while GNSS refers to all global systems, including GPS, โกลนาส, กาลิเลโอ, and BeiDou.

  • How many global navigation satellite systems are there?

    There are currently four major Global Navigation Satellite Systems (GNSS): จีพีเอส (สหรัฐอเมริกา), โกลนาส (รัสเซีย), กาลิเลโอ (สหภาพยุโรป), and BeiDou (จีน). นอกจากนี้, there are regional systems like QZSS (ญี่ปุ่น) and IRNSS (อินเดีย), which offer coverage in specific areas.

  • Does GNSS require Internet?

    เลขที่, GNSS works independently of the Internet by using satellite signals.

  • How accurate are GNSS?

    GNSS typically has meter-level accuracy, but it can reach centimeter-level with advanced methods like RTK.

  • What is GNSS used for?

    It’s used for navigation, การวางตำแหน่ง, mapping, surveying, and time synchronization across various industries.

  • What is GNSS Cold Start, Warm Start, and Hot Start?

    GNSS receivers operate in three start modes based on available data. A Cold Start requires searching for all satellite signals from scratch, taking the longest time to fix a position. A Warm Start retains time and location data but needs to update satellite info, making it faster than cold. A Hot Start is the quickest, with all data intact, allowing near-instant position acquisition.

  • What factors affect GNSS positioning accuracy?

    GNSS positioning accuracy is affected by factors such as satellite geometry, signal obstructions, atmospheric conditions, and multipath interference.

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