Solar Microwave Spectroscopy at Owens Valley Radio          Observatory
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Zirin and his collaborators will use the frequency-agile                        interferometer at Owens Valley Radio Observatory to map coronal                 magnetic fields and electrical currents in active regions and                   near flares.  They will also investigate the microwave spectra of               active regions, small bipolar magnetic regions, and flares.                                                                                                     Solar flares and other forms of activity near sunspots have                     dramatic effects on Earth.  They are caused by electrical                       currents running in the solar corona.  The radio detector                       developed by Zirin and Hurford, the "frequency-agile                            interferometer" at Owens Valley Radio Observatory, is the only                  instrument able to make detailed three-dimensional maps of these                coronal currents.  The mapping procedure will be perfected in                   time for the vigorous solar activity anticipated during the next                solar maximum, in about 1990-1991.
{'FirstName': 'Harold', 'LastName': 'Zirin', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Harold Zirin', 'EmailAddress': 'hz@caltech.edu', 'NSF_ID': '000116728', 'StartDate': '06/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
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