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Tagged with lissajous-orbit mission-design
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Why put DSCOVR in a Lissajous orbit? Wouldn't a halo orbit completely avoid the Sun exclusion zone?
Halo orbits are a sub-class of Lissajous orbits. See this answer for (much) more on that.
DSCOVR's orbit will put it in it's Sun Exclusion Zone in about 2020 where the communications line of sight ...