Chinese Meridian project

The Meridian Space Weather Monitoring Project (or Chinese Meridian Project) is a ground-based program to monitor China’s geospace environment to acknowledge the needs of both basic science and useful space weather operations. The Meridian Project consists of a chain of 15 ground-based observatories located roughly along 120°E longitude and 30°N latitude. Each observatory is equipped with multiple instruments to measure key parameters such as the baseline and time-varying geomagnetic field, as well as the middle and upper atmosphere and ionosphere from about 20 to 1000 kilometers. Starting in 2011, the project will collect data for at least 11 years, providing the wide-range, continuous, and multiparameter data sets needed to guide model developments, which in turn will better describe and predict the characteristics and dynamics of the geospace environment.

This web site introduces some instruments and provides free access to the data produced by these instruments one year ago. If you need more information about other instruments, datasets and real time data, please fill in the form below and send to us.

Acknowledging Use Of Meridian Project Data

The Merdian Project Data are in the public domain and as long as you acknowledge the Meridian Project you may use the data in your publications and presentations.

Use the following as an acknowledgement:
    We acknowledge the use of data from the Chinese Meridian Project.

We would appreciate preprints/reprints of your papers when they become available.

Our email addres:

Naming Convention of Data Files

The data file names take the generic form:
sta: the code for a station.
istnn: ist is the short name for a instrument, nn is the order of the same instrument in the same station.
dst: the code for the dataset.
LIv: LI means the level of the data. v stands for the version number of the data file.
spn: the time span of this file, it has two modes: a) STP means single point in time; b) nnX, where nn is a number and X takes one of these values: M for Minute, H for Hour, D for Day, L for Month, for example, 01H means the data file store one hour data.
yyyymmddHHMMSS: The starting point in time, and the data later than this point are stored in the file.
ext: the file format extension.

ISM Receiver and regular antenna of the Ionosphere TEC/Scintillation Monitor

ISM The Choke ring antenna

Ionosphere TEC/Scintillation Monitor(ISM)

The Ionosphere TEC/Scintillation Monitor is built based on the dual-frequency GPS module Novatel.

ISM produce the following datasets:


EMDR20 All Sky Meteor Radar(MET)

The EMDR20 all sky meteor radar produced by ATRAD of Australia.

MET produce the following datasets:

DPS Digisonde™ Portable Sounder and Magnetic Loop Turnstile Antenna

DPS DPS-4 Transmitting Antenna 

Digisonde™ Portable Sounder(DPS)

Digisonde™ Portable Sounder (DPS), produced in the University of Massachusetts Lowell’s Center for Atmospheric Research (UMLCAR).

DPS produce the following datasets:

Apply For Data

Please use this form for any requests related to the Meridian Project.