220.127.116.11 Understand cometary properties and evolution by mapping the hydrogen Ly-α emission, proportional to the outgassing rate, along its trajectory close to the Sun (Raymond et al., 1998; Uzzo et al., 2001; Bemporad et al., 2005; Ciaravella et al., 2010).
- SWA, SWA Normal Mode, long-term survey, other instruments: RPW, MAG, EPD.
- Global maps in the field of view 1.5-2.9 degrees of HI Ly-α emission and of polarized VL emission in the range 580-640 nm.
- COMET, min. obs time 3 hr, data volume ≤ 715 Mb. Repeated several times, if necessary, in available observation windows.
- Other instruments: EUI, SoloHI.
- Long-term survey.