Data / Daily products
Ionosphere products
Ionosphere observation products from GNSS receivers, Ionosonde, and VHF radar provided by ECSW software.
Ionospheric irregularities by ROTI index and Total Electron Content (TEC) maps
Ionogram (Quick look images) at Chumphon station (CPN)
Total Electron Content (TEC) by station
KMIT station (Bangkok, Thailand)
Current · processed 2026-10-25 01:01 UTNUO station (Vientiane, Laos)
Current · processed 2026-10-25 01:01 UTCPN station (Chumphon, Thailand)
Current · processed 2026-10-25 01:01 UTRUTI station (Nakhon Ratchasima, Thailand)
Current · processed 2026-10-25 01:01 UTCHMA station (Chiangmai, Thailand)
Current · processed 2026-10-25 01:01 UTCADT station (Phnom Penh, Cambodia)
Current · processed 2026-10-25 01:01 UTITC0 station (Phnom Penh, Cambodia)
Current · processed 2026-10-25 01:01 UTHUE0 station (HUE, Vietnam)
Current · processed 2026-10-25 01:01 UTHow to read this plot
- Top · VTEC
- Vertical TEC (TECU) from each satellite system; the black line is the median VTEC.
- Middle · ROTI
- ROTI (TECU/min); the dashed line marks 0.5 TECU/min.
- Bottom · Satellites
- Number of satellites by system (GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS).
Bottom axis: Universal time (UTC). Top axis: local time (UTC+7).
Scintillation S4 index (L5, elevation ≥ 40°)
Current · processed 2026-10-25 01:01 UT
Current · processed 2026-10-25 01:01 UTIonospheric irregularities by ROTI Keogram
Current · processed 2026-10-25 01:01 UT
Current · processed 2026-10-25 01:01 UTIonospheric delay gradient at Bangkok station (KMIG)
The ionospheric delay gradient (mm/km) is the spatial rate of change in the ionospheric path delay. It represents how much the ionospheric error differs over a horizontal distance between the GNSS ground station and the aircraft (or user receiver).
Current · processed 2026-10-25 01:37 UTVHF radar images
VHF radar at Chumphon, SEALION project (NICT): F-region · E-region · SEALION home
