Astronomers didn't think that "twinkling" was a particularly scientific sort of word (probably because of the connection with nursery rhymes!) and so they made it sound a bit better by calling it "scintillation".

When they make a measurement of the twinkling in space caused by the solar wind, they call it, rather grandly, an interplanetary scintillation measurement or IPS measurement.

Just remember the twinkling of stars that you see with your eye is caused by the Earth's atmosphere and IPS is caused by material in space between the planets. But the effect is much the same!