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Space Weather Follow-On L1 mission

 


Diagram showing the relative position of the Sun and the Earth and the five Lagrange points, with contour lines of the effective potential.

Diagram showing the relative position of the Sun and the Earth and the five Lagrange points,
with contour lines of the effective potential. (Image credit: NASA)

Space Weather Follow-On L1 mission (SWFO-L1) will orbit the Sun at approximately 1.5 million kilometers from Earth on the Earth-Sun line, a point known as L1. The SWFO-L1 mission will use a suite of instruments to make in-situ measurements of the solar wind thermal plasma and magnetic field as well as a CCOR instrument to detect CMEs. The L1 orbit allows for continuous unobstructed observation of the corona without interference from the Earth.


A pair of coronagraph images from SOHO's LASCO.  The left half of the image is from the LASCO C2 instrument which measures from 1.5 to 6 solar radii.  The right half of the image is from LASCO C3, which measures from 3.7 to 30 solar radii.  Both show a large stream of solar matter erupting from the top of the sun with smaller streams erupting from other positions.  The solar disk is blocked out of the image by the coronagraph instruments.

A coronal mass ejection event on Feb 27, 2000, captured by
SOHO LASCO instruments, C2 and C3. (Image credit: ESA SOHO & NASA)