IRIS close-up of a solar flare
The Slit-Jaw Imager (SJI) aboard IRIS (Interface Region Imaging Spectrograph) observes a tiny region of the Sun at an image resolution (0.166 arc-seconds per pixel) almost four times higher than the Solar Dynamics Observatory (SDO) (0.6 arc-seconds per pixel). In addition, IRIS has a narrow slit in the imaging plane (the thin, dark vertical line in the center of the inset) which directs some of the light to a spectrograph which allows solar physicists to determine velocity and temperature of the solar plasma.
In this zoom-in from a full-disk view of the Sun from SDO, the imager is observering the Sun at a wavelength of 133nm (1330 angstroms). The imager field-of-view is moved across the solar disk in four steps, allowing the slit to pass over different regions of the Sun to determine the properties of the plasma.
Note: IRIS and SDO are in very different orbits. You can see samples of the orbits at The 2013 Earth-Orbiting Heliophysics Fleet. IRIS is in a near-Earth orbit, while SDO is much higher at geosynchronous orbit. This difference in camera location creates a small parallax between the images composited from these two cameras.
Please give credit for this item to:
NASA's Scientific Visualization Studio
Datasets used in this visualization
SDO AIA 1600 (1600 Filter)ID: 757Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2014-01-28T07:25:00 - 2014-01-28T08:07:39
SDO AIA 304 (304 Filter)ID: 677Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2014-01-28T07:25:00 - 2014-01-28T08:07:39
SDO AIA 171 (171 Filter)ID: 680Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2014-01-28T07:25:00 - 2014-01-28T08:07:39
IRIS Slit-Jaw Imager (SJI)ID: 816Observed Data Collected with Imager LMSAL 2014-01-28T07:30:21 - 2014-01-28T08:07:38
Note: While we identify the data sets used in these visualizations, we do not store any further details, nor the data sets themselves on our site.