ICON FUV O N2 Profiles observations.48-day windows of data from the L2.4 v07 product are collected
into altitude, longitude, latitude, and local time bins. Mean and standard deviations of each parameter are reported in this file
Note that COLUMN_O_N2 data does not have an altitude component. The FUV instrument takes 2D images of the Earth’s horizon in the Far ultraviolet.
The imager is pointing approximately 90 degrees to the spacecraft motion, similar to looking out of the side window of a car as it drives down the road.
Onboard electronics read the image 8 times per second and perform Time Delay Integration (TDI) to remove the motion-blur from the images.
A turret is used to steer the field of view of the instrument left to right to ensure it always looks along the magnetic meridian (towards the magnetic pole).