| Diagnostics of magnetic fields in the solar atmosphere is common motivation in future solar observations. We at NAOJ achieved precise spectro-polarimetric measurements at the photospheric line with the Solar Optical Telescope (SOT) on HINODE. In order to extend our spectro-polarimetric capability to diagnose chromospheric magnetic fields, we are now running two projects: One is a sounding rocket experiment CLASP (Chromospheric Lyman-Alpha SpectroPolarimeter) aiming to explore Hanle diagnostics by UV polarimetry at spectrum lines such as Lyman-alpha and Mg II h & k. One is a spectro-polarimeter SCIP (SUNRISE Chromospheric Infrared spectroPolarimeter) aboard the SUNRISE balloon-borne 1 m optical telescope aiming to pursue Zeeman diagnostics by precise spectro-polarimetry of multiple photospheric and chromospheric lines. Scientific and engineering demonstration through these projects is an important step toward the next-generation solar observations, such as DKIST and SOLAR-C. |