SWAN observations yield water production time series for comets C/2017 K2 and C/2022 E3, with K2 declining as r^-3.2 post-perihelion and E3 dropping by about half shortly before perihelion.
The principal investigation of SWAN is observing all-sky images at H Lya to measure the changing spatial structure of interstellar hydrogen streaming through the solar system
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Water Production Rates from SOHO/SWAN Observations of Comets C/2017 K2 (PanSTARRS) and C/2022 E3 (ZTF)
SWAN observations yield water production time series for comets C/2017 K2 and C/2022 E3, with K2 declining as r^-3.2 post-perihelion and E3 dropping by about half shortly before perihelion.