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Preparing to Install Heliospheric Imager

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In an APL clean room STEREO team members from the Naval Research Laboratory prepare the Heliospheric Imager for installation aboard the "A" observatory (the one that will be placed "ahead" of Earth in its orbit around the sun). The Heliospheric Imager - part of the larger SECCHI (Sun Earth Connection Coronal and Heliospheric Investigation) instrument suite - will obtain the first direct imaging observations of coronal mass ejections in interplanetary space.

The principal investigator for the SECCHI instrument suite is Russell Howard of the Naval Research Laboratory, Washington, D.C.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory