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- [Source: Stanford University HMI home page, http://hmi.stanford.edu/ ]
The primary goal of the Helioseismic and Magnetic Imager (HMI) investigation is to study the origin of solar variability and to characterize and understand the Sun’s interior and the various components of magnetic activity. The HMI investigation is based on measurements obtained with the HMI instrument as part of the Solar Dynamics Observatory (SDO) mission. HMI makes measurements of the motion of the solar photosphere to study solar oscillations and measurements of the polarization in a spectral line to study all three components of the photospheric magnetic field. HMI produces data to determine the interior sources and mechanisms of solar variability and how the physical processes inside the Sun are related to surface magnetic field and activity. It also produces data to enable estimates of the coronal magnetic field for studies of variability in the extended solar atmosphere. HMI observations will enable establishing the relationships between the internal dynamics and magnetic activity in order to understand solar variability and its effects, leading to reliable predictive capability, one of the key elements of the Living With a Star (LWS) program.
Group: Instrument_Details
Entry_ID: HMI-SDO
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Photon/Optical Detectors
Short_Name: HMI-SDO
Long_Name: Helioseismic and Magnetic Imager on Solar Dynamics Observatory
End_Group
Group: Associated_Platforms
Short_Name: SDO
End_Group
Group: Spectral_Frequency_Information
Wavelength_Keyword: Visible
End_Group
Online_Resource: http://sdo.gsfc.nasa.gov/mission/instruments.php
Online_Resource: http://hmi.stanford.edu/
Sample_Image: http://hmi.stanford.edu/cover_tiny.jpg
Creation_Date: 2009-04-24
Group: Instrument_Logistics
Instrument_Owner: USA/NASA
End_Group
End_Group
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