NEAR-FIELD PATTERN MEASUREMENTS OF SUBMILLIMETER-WAVE ANTENNA AND OPTICS FOR JEM/SMILES

The superconducting submillimeter-wave limb-emission sounder (JEM/SMILES) is the earth observation mission which is developed in the cooperation between National Space Development Agency of Japan (NASDA) and Communications Research Laboratory (CRL). JEM/SMILES is currently developed for the Japanese Experiment Module (JEM, dubbed as "KIBO") of the International Space Station (ISS). JEM/SMILES will obtain global maps of CIO, BrO, HC1, Os and other stratospheric trace gases related to ozone chemistry by observing their spectral emission lines in two frequency bands at 624.32-626.32GHz (LSB) and 649.12-650.32GHz (USB) This paper presented an outline of the JEM/SMILES instruments, and the measurement method of the antenna and quasi-optical beam in the submillimeter-wave as special technique of the near-field planer scanning. To evaluate the characteristics of the beam pattern and pointing of the beam, the measurement method for a submillimeter-wave antenna and optics will be estimated by using two sets of phaseless patterns in its near-field. And also, we introduce simply the progress reports about development of the JEM/SMILES, and we arrange the technical problem which became clear as development progress. Finally, we report the clue of solution as earth observation mission using the JEM-Exposed Facility.