Welcome to CEGS, Thailand

Center of Excellence in GNSS and Space Weather, hosted by King Mongkut’s Institute of Technology Ladkrabang (KMITL). Ionosphere observation products from GNSS receivers, Ionosonde, and VHF radar provided by ECSW software.

Ionospheric irregularities by ROTI Keogram (latitude) — **Ionospheric irregularities by ROTI Keogram.** Ionosphere products

Latest daily products

Ionospheric irregularities by ROTI Keogram10-15 01:01 UT
ROTI index, scatter vertical TEC and grid VTEC 2-D maps10-15 01:01 UT
Total Electron Content (TEC) at 8 stations10-15 01:01 UT
Scintillation S4 index, Chumphon (CPN1) and Bangkok (KMIT)10-15 01:01 UT
Positioning error map10-15 01:01 UT
Ionospheric delay gradient at Bangkok station (KMIG)10-15 01:37 UT
TEC Forecasting10-15 06:05 UT
Ionogram (Quick look images) at Chumphon station (CPN)10-15 16:22 UT

Paused: Aerosol Optical Depth (AOD) (since 2025-01-29).

Status at 2026-10-15 16:26 UT

Start here

Ionosphere products, GNSS receivers, Ionosonde and VHF radar
Data request, GNSS and Ionosonde data · NTRIP
Knowledges, GNSS, Ionosphere and Space Weather

Scintillation S4 index and Total Electron Content (TEC)

**Scintillation S4 index, Chumphon (CPN1).** L5, elevation ≥ 40°.

**Scintillation S4 index, Bangkok (KMIT).** L5, elevation ≥ 40°.

Total Electron Content (TEC), KMIT station (Bangkok, Thailand) — **KMIT station (Bangkok, Thailand).** All stations

This web portal aims to

Maintain the GNSS, ionospheric data, and sensor database from the stations which we operate and maintain in Thailand and nearby countries.
Provide the observation of solar parameters, space environment parameters, and GNSS and ionosphere graphs.
Provide data downloading service for research.
Develop data products from these observations and support research operations at our Laboratory.
Provide NTRIP service from several GNSS stations.
Disseminate the knowledge and awareness of GNSS, Ionosphere, and Space Weather Effects.

CEGS was established in 2020 under continuous financial support from PMU-B, NRCT, NICT (Japan), ENRI (Japan), KRIS and others. Us · Facility

VHF antenna, VHF radar station, KMITL Chumphon campus — **VHF radar station**, KMITL Chumphon campus, Chumphon, Thailand.

Team at the Korat station (RMUTI, Rajamangala University) — **Korat station** (RMUTI, Rajamangala University).

When using our data, please acknowledge: Thai GNSS and Space Weather Information Center, King Mongkut’s Institute of Technology Ladkrabang, Thailand. Contact