After Elena was done investigating her target for the mission, she decided to not do the job herself. Even tho that sci-fi world was interesting, for the time being she wanted to stay in RASHTROYNI. The time axis of PSYGER was quite distant from RASHTROYNI, so at minimum Elena had to leave for 3 days if she wanted to complete the mission herself.
Not only that, she found this mission to be a good chance for her brand new creations to see another world. Yes, she was thinking about her newly created race of the Anomalous Beings. After their creation they were mostly restricted to Elena's mini world.