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Abstract:
Gan is one of the few geomagnetic observatories in the Indian Ocean and located close to the geographic equator. The observatory is located remotely behind the runway of an international airport. All electric power has to be produced by a solar panel and the dat transfer is organized by a point-2-point WLAN connection. Its is an INTERMAGNET observatory since 2012. In February 2022, the geomagnetic observatory Gan was upgraded with two new data-loggers, a new solar panel and a new solar charger and the DI-flux theodolite got a new fluxgate sensor. The solar charger can now be accessed in real-time and gives information on the state of the power supply including the batteries. Currently, during adverse weather conditions, the limiting factor for the power supply is the battery, not the soar panel. The two data loggers are connected to a FGE variometer with two analogue outputs. As the individual loggers fail more frequently than the FGE, this arrangement provides additional, cost-efficient redundancy. It also allows to directly compare the two data-logger, e.g to test software updates.
