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Research Output

  • 516 Citations
  • 8 h-Index
  • 17 Article
  • 14 Conference contribution
  • 8 Conference article
  • 2 Paper
2019

Interpretation of lidar ratio and depolarization ratio of ice clouds using spaceborne high-spectral-resolution polarization lidar

Okamoto, H., Sato, K., Borovoi, A., Ishimoto, H., Masuda, K., Konoshonkin, A. & Kustova, N., Dec 9 2019, In : Optics Express. 27, 25, p. 36587-36600 14 p.

Research output: Contribution to journalArticle

Large-and-Sparse-particle Clouds (LSC): Clouds which are subvisible for space-borne lidar and observable for space-borne cloud radar

Iwasaki, S., Seguchi, T., Okamoto, H., Sato, K., Katagiri, S., Fujiwara, M., Shibata, T., Tsuboki, K., Ono, T. & Sugidachi, T., Jan 1 2019, In : Polar Science.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Measurement of water mist particle size generated by rocket launch using a two-wavelength multi-static lidar

Jin, Y., Sugimoto, N., Nishizawa, T., Yoshitomi, T., Sawada, A., Sarae, W., Hattori, A., Yamasaki, Y., Okamoto, H. & Sato, K., Aug 10 2019, In : Applied Optics. 58, 23, p. 6274-6279 6 p.

Research output: Contribution to journalArticle

Modeling the depolarization of space-borne lidar signals

Sato, K., Okamoto, H. & Ishimoto, H., Jan 1 2019, In : Optics Express. 27, 4, p. A117-A132

Research output: Contribution to journalArticle

4 Citations (Scopus)
2018

Active sensor synergy for arctic cloud microphysics

Sato, K., Okamoto, H., Katagiri, S., Shiobara, M., Yabuki, M. & Takano, T., Apr 13 2018, In : EPJ Web of Conferences. 176, 08004.

Research output: Contribution to journalConference article

Application of multiple-scattering polarization lidar for the evaluation of space-borne lidar algorithms

Okamoto, H., Sato, K., Katagiri, S., Fujikawa, M., Nishizawa, T., Sugimoto, N., Jin, Y., Shimizu, A. & Ishimoto, H., Apr 13 2018, In : EPJ Web of Conferences. 176, 02014.

Research output: Contribution to journalConference article

Development of Tm,Ho: YLF laser for future space-based doppler wind lidar

Ishii, S., Sato, A., Aoki, M., Akahane, K., Nagano, S., Nakagawa, K., Sato, K. & Okamoto, H., Jan 1 2018, Lidar Remote Sensing for Environmental Monitoring XVI. Singh, U. N. & Sugimoto, N. (eds.). SPIE, 1077903. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10779).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Next-generation-synergetic-observation-system for the unified analysis of CALIPSO, ADM-Aeolus and EarthCARE-ATLID

Okamoto, H., Sato, K., Ishii, S., Aoki, M., Nishizawa, T., Sugimoto, N., Jin, Y., Ohno, Y., Horie, H. & Fujikawa, M., Jan 1 2018.

Research output: Contribution to conferencePaper

Physical model for multiple scattered space-borne lidar returns from clouds

Sato, K., Okamoto, H. & Ishimoto, H., Mar 19 2018, In : Optics Express. 26, 6, p. A301-A319

Research output: Contribution to journalArticle

5 Citations (Scopus)

Refinement of the CALIOP cloud mask algorithm

Katagiri, S., Sato, K., Ohta, K. & Okamoto, H., Apr 13 2018, In : EPJ Web of Conferences. 176, 05043.

Research output: Contribution to journalConference article

2017

Development of Algorithm for Discriminating Hydrometeor Particle Types With a Synergistic Use of CloudSat and CALIPSO

Kikuchi, M., Okamoto, H., Sato, K., Suzuki, K., Cesana, G., Hagihara, Y., Takahashi, N., Hayasaka, T. & Oki, R., Oct 27 2017, In : Journal of Geophysical Research: Atmospheres. 122, 20, p. 11,022-11,044

Research output: Contribution to journalArticle

5 Citations (Scopus)

Development of multiple scattering polarization lidar to observe depolarization ratio of optically thick low level clouds

Okamoto, H., Sato, K., Nishizawa, T., Sugimoto, N. & Jin, Y., Feb 22 2017, Radiation Processes in the Atmosphere and Ocean, IRS 2016: Proceedings of the International Radiation Symposium (IRC/IAMAS). Schmutz, W., Davies, R. & Egli, L. (eds.). American Institute of Physics Inc., 050002. (AIP Conference Proceedings; vol. 1810).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Information content of cloud physical properties derived from satellite active remote sensors

Sato, K. & Okamoto, H., Feb 22 2017, Radiation Processes in the Atmosphere and Ocean, IRS 2016: Proceedings of the International Radiation Symposium (IRC/IAMAS). Schmutz, W., Davies, R. & Egli, L. (eds.). American Institute of Physics Inc., 050003. (AIP Conference Proceedings; vol. 1810).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power laws for the backscattering matrices in the case of lidar sensing of cirrus clouds

Kustova, N. V., Konoshonkin, A. V., Borovoi, A., Okamoto, H., Sato, K. & Katagiri, S., Jan 1 2017, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics. Matvienko, G. G. & Romanovskii, O. A. (eds.). SPIE, 1046637. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10466).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Relationship between ice supersaturation and ice microphysics inferred from CloudSat, CALIPSO and AIRS

Okamoto, H., Sato, K., Hagihara, Y. & Ishimoto, H., Feb 22 2017, Radiation Processes in the Atmosphere and Ocean, IRS 2016: Proceedings of the International Radiation Symposium (IRC/IAMAS). Schmutz, W., Davies, R. & Egli, L. (eds.). American Institute of Physics Inc., 070006. (AIP Conference Proceedings; vol. 1810).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Testing hydrometeor particle type discrimination derived from CloudSat and CALIPSO

Kikuchi, M., Okamoto, H., Sato, K. & Hagihara, Y., Feb 22 2017, Radiation Processes in the Atmosphere and Ocean, IRS 2016: Proceedings of the International Radiation Symposium (IRC/IAMAS). Schmutz, W., Davies, R. & Egli, L. (eds.). American Institute of Physics Inc., 070005. (AIP Conference Proceedings; vol. 1810).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)
2016

Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds

Konoshonkin, A. V., Kustova, N. V., Borovoi, A. G., Okamoto, H., Sato, K., Ishimoto, H., Grynko, E. & Foerstner, J., Jan 1 2016, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics. Romanovskii, O. A. & Matvienko, G. G. (eds.). SPIE, 1003533. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10035).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Depolarization Ratio of Clouds Measured by Multiple-Field of view Multiple Scattering Polarization Lidar

Okamoto, H., Sato, K., Makino, T., Nishizawa, T., Sugimoto, N., Jin, Y. & Shimizu, A., Jun 7 2016, In : EPJ Web of Conferences. 119, 11007.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Development of a multiple-field-of-view multiple-scattering polarization lidar: Comparison with cloud radar

Okamoto, H., Sato, K., Nishizawa, T., Sugimoto, N., Makino, T., Jin, Y., Shimizu, A., Takano, T. & Fujikawa, M., Dec 26 2016, In : Optics Express. 24, 26, p. 30053-30067 15 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Evaluation of Retrieval Algorithms for Ice Microphysics Using CALIPSO/CloudSat and Earthcare

Okamoto, H., Sato, K., Hagihara, Y., Ishimoto, H., Borovoi, A., Konoshonkin, A. & Kustova, N., Jun 7 2016, In : EPJ Web of Conferences. 119, 16007.

Research output: Contribution to journalConference article

2 Citations (Scopus)

Modeling Lidar Multiple Scattering

Sato, K., Okamoto, H. & Ishimoto, H., Jun 7 2016, In : EPJ Web of Conferences. 119, 21005.

Research output: Contribution to journalConference article

4 Citations (Scopus)

Optical and microphysical properties of cirrus clouds retrieved from combined lidar and radar measurements

Konoshonkin, A. V., Borovoi, A. G., Kustova, N. V., Okamoto, H. & Sato, K., Jan 1 2016, 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics. Romanovskii, O. A. & Matvienko, G. G. (eds.). SPIE, 100353X. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10035).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2015

The earthcare satellite: The next step forward in global measurements of clouds, aerosols, precipitation, and radiation

Illingworth, A. J., Barker, H. W., Beljaars, A., Ceccaldi, M., Chepfer, H., Clerbaux, N., Cole, J., Delanoë, J., Domenech, C., Donovan, D. P., Fukuda, S., Hirakata, M., Hogan, R. J., Huenerbein, A., Kollias, P., Kubota, T., Nakajima, T., Nakajima, T. Y., Nishizawa, T., Ohno, Y. & 9 others, Okamoto, H., Oki, R., Sato, K., Satoh, M., Shephard, M. W., Velázquez-Blázquez, A., Wandinger, U., Wehr, T. & Van Zadelhoff, G. J., Aug 1 2015, In : Bulletin of the American Meteorological Society. 96, 8, p. 1311-1332 22 p.

Research output: Contribution to journalArticle

198 Citations (Scopus)
2014

One-dimensional variational (1D-Var) retrieval of middle to upper tropospheric humidity using AIRS radiance data

Ishimoto, H., Okamoto, K., Okamoto, H. & Sato, K., Jun 27 2014, In : Journal of Geophysical Research. 119, 12, p. 7633-7654 22 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2013

Detection and analyses of hydrometeor properties from EarthCARE data

Sato, K. & Okamoto, H., May 22 2013, Radiation Processes in the Atmosphere and Ocean, IRS 2012 - Proceedings of the International Radiation Symposium (IRC/IAMAS). p. 200-203 4 p. (AIP Conference Proceedings; vol. 1531).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Development of level 2 algorithms for EarthCARE CPR/ATLID

Okamoto, H., Sato, K., Hagihara, Y. & Nishizawa, T., May 22 2013, Radiation Processes in the Atmosphere and Ocean, IRS 2012 - Proceedings of the International Radiation Symposium (IRC/IAMAS). p. 448-451 4 p. (AIP Conference Proceedings; vol. 1531).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2011
31 Citations (Scopus)
2010

Application of optimal estimation to retrieve hydrometeor properties from lidar/radar method

Sato, K. & Okamoto, H., 2010, Reviewed and Revised Papers, 25th International Laser Radar Conference.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)
67 Citations (Scopus)

ICE CLOUD MICROPHYSICS FROM CLOUDSAT AND CALIOP: ANALYSIS OF ORIENTED CRYSTALS

Okamoto, H., Sato, K., Yuichiro, H. & Hirakata, M., 2010, Reviewed and Revised Papers, 25th International Laser Radar Conference.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2009

95-GHz Doppler radar and lidar synergy for simultaneous ice microphysics and in-cloud vertical air motion retrieval

Sato, K., Okamoto, H., Yamamoto, M. K., Fukao, S., Kumagai, H., Ohno, Y., Horie, H. & Abo, M., Feb 16 2009, In : Journal of Geophysical Research Atmospheres. 114, 3, D03203.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Multi-wavelength radar algorithm with Doppler function for the retrieval of cloud microphysics with precipitation

Okamoto, H., Sato, K., Otomo, S., Hagihara, Y., Yoshida, R., Iwanami, K., Maesaka, T., Murakami, M., Orikasa, N., Nakazato, M., Yamauchi, H. & Inoue, H., May 25 2009, In : AIP Conference Proceedings. 1100, p. 307-310 4 p.

Research output: Contribution to journalConference article

Retrieval of ice cloud microphysics by synergy use of CloudSat and CALIPSO data

Okamoto, H., Sato, K. & Hagihara, Y., May 25 2009, In : AIP Conference Proceedings. 1100, p. 412-415 4 p.

Research output: Contribution to journalConference article

2008

Observation of particle fall velocity in cirriform cloud by VHF and millimeter-wave Doppler radars

Yamamoto, M. K., Ohno, Y., Horie, H., Nishi, N., Okamoto, H., Sato, K., Kumagai, H., Yamamoto, M., Hashiguchi, H., Mori, S., Hashiguchi, N. O., Nagata, H. & Fukao, S., Jun 27 2008, In : Journal of Geophysical Research Atmospheres. 113, 12, D12210.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Testing IWC retrieval methods using radar and ancillary measurements with in situ data

Heymsfield, A. J., Protat, A., Austin, R. T., Bouniol, D., Hogan, R. J., Delanoe, J., Okamoto, H., Sato, K., van Zadelhoff, G. J., Donovan, D. P. & Wang, Z., Jan 1 2008, In : Journal of Applied Meteorology and Climatology. 47, 1, p. 135-163 29 p.

Research output: Contribution to journalArticle

68 Citations (Scopus)

Vertical cloud properties in the tropical western Pacific Ocean: Validation of the CCSR/NIES/FRCGC GCM by shipborne radar and lidar

Okamoto, H., Nishizawa, T., Takemura, T., Sato, K., Kumagai, H., Ohno, Y., Sugimoto, N., Shimizu, A., Matsui, I. & Nakajima, T., Dec 27 2008, In : Journal of Geophysical Research Atmospheres. 113, 24, D24213.

Research output: Contribution to journalArticle

31 Citations (Scopus)
2007

Cloud microphysics and dynamical characteristics of tropical ice clouds inferred from cloud radar and lidar

Sato, K. & Okamoto, H., Jan 1 2007, Hyperspectral Imaging and Sounding of the Environment, HISE 2007. Optical Society of America, (Optics InfoBase Conference Papers).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2006
54 Citations (Scopus)

The effects of nonsphericity and variation in ice crystal bulk density on 95GHz cloud radar signals

Sato, K. & Okamoto, H., 2006, IRS 2004:Current Problems in Atmospheric Radiation. A. Deepak Publishing, p. 119-122

Research output: Chapter in Book/Report/Conference proceedingConference contribution