Authors: Philip H. Scherrer and the HMI Team
Affiliation: Stanford University
The Heliospheric and magnetic imager investigation will focus on analysis of observations obtained with the HMI instrument on the Solar Dynamics Observatory mission. HMI will obtain high resolution and high cadence Dopplergrams and magnetograms. The resolution will be about 1 arc-sec with a cadence of more than one per minute for Dopplergrams and line-of-sight magnetograms and 90-100 seconds for the vector magnetograms. The instrument will have one primary mode, “on”. The observables will be computed on the ground from sets of filtergrams obtained in up to 6 positions across the FeI line at 617.3nm with a 4096x4096 pixel camera as a cadence of one image each 2 seconds interleaved on two cameras. The HMI Science Operations Center (SOC) will be at Stanford University (data) and Lockheed Martin Solar and Astrophysics Lab (operations) and will be operated as a joint SOC (JSOC) with the AIA instrument. The ground data system will process the data in a processing pipeline generating a collection of standardized data products which will be available for all to use for investigations. The Co-Investigator team will provide analysis code to populate the pipeline. The total data generated and archived at the JSOC will be on the order of several TB/day and will be available for browsing and distribution via online tools such as the VSO. Other papers at this meeting will describe the HMI instrument, and the helioseismology and magnetic field science goals in more detail.