Data coming back from orbit seemed to not make sense. The glow at the equator changed from place to place around the Earth in ways we didn’t expect.
Researchers from the U.S. Naval Research Laboratory, UC-Berkeley, and St. Cloud State University talk about the importance of MIGHTI, a space weather instrument set to launch on the ICON mission next summer.
The two populations of hiss, low and high frequency, inhabit two separate regions in near-Earth space.
Credits: NASA’s Goddard Space Flight Center/Mary Pat Hrybyk-Keith
The space surrounding our planet is full of restless charged particles and roiling electric and magnetic fields, which create waves around Earth. One type of wave, plasmaspheric hiss, is particularly important for removing charged particles from the Van Allen radiation belts, a seething coil of particles encircling Earth, which can interfere with satellites and telecommunications. A new study published in Journal of Geophysical Research using data from NASA’s Van Allen Probes spacecraft has discovered that hiss is more complex than previously understood.
The new study looked at a newly identified population of hiss waves at a lower frequency than usually studied. These low-frequency hiss waves are particularly good at cleaning out high-energy particles — those that can cause damage to satellites — from the radiation belts. The authors of the study noticed that low-frequency waves are actually a separate and unique population, tending to cluster in different regions around Earth compared to their high-frequency counterparts.
The complete article is found here.
This time-lapse video shows the integration of instruments into the ICON payload at the Space Dynamics Laboratory in Logan, Utah. The video covers a 15-week period from mid-February, 2016 until the end of May, 2016. Occasional darkness indicates cleanliness inspections using a UV light, and the blue tower that is occasionally visible is the last tracker used for alignment measurements. The video begins with preparation of the Payload Interface Plate (PIP), with purge lines and the MIGHTI fiber optic assembly. The order of instrument integration is as follows: MIGHTI B, MIGHTI A, ICP-Echo, MIGHTI cal lamp, MIGHTI ebox, IVM A, EUV, FUV, IVM B, star tracker and antenna mast simulators, and ICP flight. The video ends with the payload moved from the handling cart to the shipping container base, ready for testing.
Mark your calendars for the Annual Novato Space Festival, Sunday August 6th, from 10:00 AM to 4:00 PM. Meet legendary Astronauts from the Apollo, Space Shuttle and International Space Station Programs.
NEW THIS YEAR…
EARLY ENTRANCE at 9:30am for families with CHILDREN 12 & UNDER
You’ll get to browse the exhibit area first,
THEN you’ll get to meet Astronaut Jerry Ross and he will read to you from his children’s book!
Data coming back from orbit seemed to not make sense. The glow at the equator changed from place to place around the Earth in ways we didn’t expect. Now we are building the ICON mission, a satellite that will explore this region of the atmosphere, where Earth’s weather meets space weather…It really takes a huge number of people working together to make a space science mission.