US-based Simpson neutron monitor network : “Back to the future”

The status and condition of the various neutron monitors operated by the US reached its nadir in the mid 2000s. Now with significant investments by the National Science Foundation, the existing network will be repaired, upgraded and selectively modernized. Furthermore, a key site on the summit of Haleakala will
be outfitted once again with a monitor, supported by a Space Weather Center in Honolulu. We report on the start of this work, plans for the near future with funds from the NSF and longer-term plans to take the network to a new operational and scientific level. We also report on a complementary deployment of a new portable monitor on the summit of Haleakala on Maui – a joint effort between Thai and US institutions.

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