The GNSS TEC monitor is developed by IGGCAS, with small size and low power consumption (<15 W). It uses the Novatel OEM 628 card to track signals of GPS, GLONASS and Beidou satellite systems. The monitor can be operated automatically, in an unattended manner. Electric power and internet are needed.

The GNSS TEC and scintillation monitor is developed by IGGCAS, with small size and low power consumption (<20 W). It uses the PolarRx5S receiver to track signals of GPS, GLONASS, Beidou, and Galileo satellite systems. The ionospheric TEC and scintillation values can be derived from the measurements. The monitor can be operated automatically in an unattended manner. Electric power and internet are needed.

PDI was designed and developed by IGGCAS and South Central University for Nationalities. PDI uses a set of technologies (e.g., code multiplexing and antenna/transmitter matching) that allow it to obtain quality Doppler ionograms at a good time resolution with small transmitting antennas. PDI has the capability to detect and characterize small-scale/short-period ionospheric disturbances and to be quickly assembled and set up at temporary field stations for campaign coordinated observations. Under IONISE, we are building a short baseline network of PDI, which consists of multiple receivers spatially separated by ~100 km around Hainan and is expected to characterize the propagation characteristics of low latitude ionospheric disturbances at different spatial and temporal scales, and reveal the possible seeding sources for F region irregularities.

The Sanya VHF coherent scatter radar (which was moved to Ledong in June 2019) works with an operating frequency of 47.5 MHz and a peak power of 24 kW. It is sensitive to irregularities of 3-m scale size and is a useful tool to study the ionospheric E, valley and F region irregularities. The antenna pattern satisfies the perpendicular condition to geomagnetic fields at both E and F regions, and can detect the coherent echoes arising from field-aligned irregularities. The antenna array is composed of six identical modules (each module consist of 2×2 five element Yagi antennas) aligned in the east-west direction that can receive the radar echoes separately and independently.

We are building a larger VHF radar at Ledong which consists of 135 antennas for observing meteor and ionospheric irregularities.

Notably, all-sky meteor radar can also be employed to observe ionospheric E region irregularities.