VIETNAMESE Repeat Station Survey
Geomagnetic repeat stations are defined locations within a certain region (usually a country) where absolute measurements are carried out in regular time intervals, usually annually to once every 5 years. Repeat station data are used to map the main field and study secular variation in detail. The French National Observatory (CLF) participated in the vietnamese repeat station measurements.
The Vietnamese repeat station survey is made under a cooperation between the Hanoi Institute of Geophysics (Vietnam) and the Institut de Physique du Globe de Paris (France), the first magnetic measurement campaign on the 56 points of the repeat station network was realized in 1991, the second in 1997 [Chau 2001] and the third one in 2003. The measurements at each station of the repeat network were realized by Vietnamese researchers with the collaboration of Mr. Daniel GILBERT, from IPGP.