Topical Issue - Space Weather Instrumentation
Open Access
Technical Article

Fig. 8

image

Download original image

The squared difference between variations observed by three NMs. (SOPO-SYO_NM)2, (SOPB-SYO_NM)2 and (SOPO-SOPB)2 are shown by black open circles, red open triangles and blue open squares, respectively. Differences became smaller after 2019, except in several short periods. Minor tick marks on the horizontal axis are indicated every 27 days.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.