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EVE Underflight Calibration Sounding Rocket Launches Successfully
UPDATE: June 23, 2012, 13:30 MDT: The NASA EVE Underflight Calibration Sounding Rocket launched successfully. Based on the quicklook realtime data, all of the rocket EVE instrument channels appear to have made excellent solar EUV irradiance measurements. The two new soft X-ray spectrometers appear to have worked too. Detailed data analysis will be done to further analyze the quality of the rocket data and to produce a solar EUV irradiance reference spectrum that then can be used to calibrate the satellite SDO EVE and other solar EUV instruments.

EVE Underflight Calibration Sounding Rocket Launch
June 20, 2012
On March 23, 2011, two on-board cameras followed a sounding rocket on its journey from Earth to space and back again. The rocket was launched to measure solar energy output and calibrate the EVE instrument on the Solar Dynamics Observatory. Credit: NASA
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The Solar Dynamics Observatory (SDO) was launched on 11 February 2010, and the EUV Variability Experiment (EVE), one of the three solar instruments aboard SDO, began normal operations on 1 May 2010. As part of the planned SDO EVE program, sounding rockets are flown regularly to provide underflight calibrations in order to more accurately track instrument degradation trends.

The principal investigator is Dr. Tom Woods from the Laboratory For Atmospheric And Space Physics, University of Colorado.

The next launch of the EVE underflight calibration sounding rocket payload is planned for June 23, 2012 at 13:00 MDT (window 13:00 - 13:30 MDT) (3:00pm EDT) from the White Sands Missile Range. This flight's primary purpose is to provide the third underflight calibration for the SDO EVE satellite instrument. Launch time is near local noon to minimize the atmospheric absorption of the solar EUV radiation during the rocket observations.

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› Download detailed launch information PDF (948 KB)
Jennifer Rumburg
NASA Headquarters