Observations

Mk4-STEREO-LASCO Composites

HAO / MLSO is now providing daily composite images of the solar corona as seen from 3 viewing angles: STEREO B, Earth-Sun, and STEREO-A. The STEREO A/B composites consist of SECCHI images from: EUVI (inner corona seen against the solar disk), the MLSO MK4 K-Coronameter (blue), the COR1 Coronagraph (green) and the COR2 Coronagraph (in red). The SOHO/MK4 composite combines EIT (solar disk), MK4 (blue) and LASCO C2 (red). MK4 images are NOT rotated to match the STEREO viewing angles.

Full Res Mk4 Images & Movies Available

The home page of this MLSO website now features full-resolution GIF images and movies for the Mk4 instrument. Clicking on the thumbnail images for this instrument will now give you higher resolution GIF images of the latest data.

CHIP Full Resolution Movies Online

High resolution movies of CHIP data are now available in the data summary pages.

Funding Approved for New Coronagraph

NCAR/ESSL has approved funding for a new coronagraph to replace the aging Mk4 instrument. Keep track of this exciting development on our New Coronagraph page. The Mk4 is still offline while a new camera is being installed and tested. Thank you for your patience.

PICS Narrow-band Limb Images

The PICS instrument is now serving images of the limb taken with a narrow-band H-alpha filter. The new data replaces the broad-band images in the MLSO data portal, and its first date of appearance was May 5th, 2009. The animation to the left shows narrow-band limb images of prominence activity occurring at approximately 21:08 UT on May 8th, 2009.

Eclipse Archive

The High Altitude Observatory of the National Center for Atmospheric Research has built an archive of images of solar eclipses which are deemed to be of sufficient quality for research. The data begin from 1869, extend to the present day and are from a diverse range of sources, but have been converted to a standard format.

New Dome at NCAR's Mesa Lab

The High Altitude Observatory and the COSMO K-coronagraph project have funded a new solar dome at the National Center for Atmospheric Research (NCAR) Mesa Lab. The new dome is the same size (16.5 feet diameter) as the large dome at MLSO and will house the HAO solar-pointed spar, which is a duplicate of the MLSO spar. This new facility will be used to test and calibrate the COSMO K-coronagraph before it is deployed to MLSO in early 2013.

CoMP Data Now Available

Coronal Multichannel Polarimeter (CoMP) data are now available from the MLSO data calendar. Expect the number of days with processed data to increase in the coming weeks, so check back often!

Transit of Venus

On June 5th, MLSO observed the last transit of Venus in our lifetimes! Visit our transit page to view movies taken during the event.

Links to Other Sun "Spots"

If you found the MLSO pages interesting, you might enjoy visiting the following web sites:

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