Skip Navigation

Brian Drouin

Photo of Brian Drouin


4800 Oak Grove Drive
M/S 183-901

Pasadena, CA 91109





Curriculum Vitae:

Click here

Member of:

Laboratory Studies And Atmospheric Observations

Group Supervisor


Dr. Brian Drouin's background in chemistry and mathematics, and interest in molecular structure and symmetry, have fostered a career molecular spectroscopy to support remote sensing observations. Beginning with microwave spectroscopy of organometallic compounds, his Ph. D. work involved measurement and analyses of highly precise rotational transition frequencies of molecules in cold molecular beams. At JPL he has recorded and analyzed millimeter and submillimeter spectra of both astrophysical and atmospheric molecules while incorporating state-of-the-art hardware and software novel spectrometers. He is now a JPL research scientist and is responsible for measurements of molecular line-shape parameters for the Microwave Limb Sounder, as well as measurements of collision rates for water at very low temperatures, and THz measurements of molecules that are expected to be observable with the Herschel Space Observatory. He is the primary caretaker for the JPL spectral line catalog used throughout the spectroscopy and remote sensing communities. He is also the Deputy Principle Investigator for the Polar Radiant Energy in the Far-InfraRed Experiment (PREFIRE) that will quantify the radiative processes effected by changing temperatures in the Arctic.


  • B.S. in Mathematics, University of Wisconsin (1995)
  • B.S. in Chemistry, University of Wisconsin (1995)
  • Ph.D. in Chemistry, University of Arizona (1999)

Professional Experience

  • Jet Propulsion Laboratory (1999-Present)
    • Principal Scientist (2018 - present)
    • Group Supervisor, Laboratory Studies and Atmospheric Observations (2015 - present)
    • Research Scientist, Science Division (2005 - 2018)
    • Scientist, Science Division (2001-2005)
    • California Institute of Technology Postdoctoral Scholar at JPL (1999-2001)
  • University of Arizona, Department of Chemistry (1995-1999)
    • Research Assistant, Microwave Spectroscopy (1996-1999)
    • Teaching Assistant, Physical & General Chemistry (1995-1999)
  • University of Wisconsin, (1993-1995)
    • Undergraduate Researcher, Inorganic Chemistry (1993-1995)
    • Undergraduate Researcher, Horticulture (1994-1995)
    • Undergraduate Researcher, Analytical Chemistry (1993, 1995)

Research Interests

  • Instrumentation for remote detection of far-infrared radiation (D-PI, PREFIRE)
  • Atmospheric Chemistry, Climate Change and Pollution (PI - Millimeter and Submillimeter Spectroscopy for Atmospheric Research)
  • Low Temperature Collisional Dynamics (PI - Measurements of State-to-State Collision Rates for Water)
  • Molecular Spectra and Structure (PI - Laboratory Spectroscopy and Analysis for Herschel, PI - Millimeter and Submillimeter Spectral Line Catalog)
  • Instrumentation for Laboratory and Field Studies (PI - Spectrometer-on-a-Chip)

Selected Awards

  • URSI/NRSM: Hans Liebe Award Fellowship / Lectureship (2021)
  • Explorer Award - For successful Earth Ventures Instrument-4 Proposal, PREFIRE (2018)
  • JPL Voyager Award - Demonstration of a miniaturized pulse-echo millimeter wave spectrometer (2016)
  • NASA Individual Outstanding Accomplishment "Significant scientific discovery by measuring the structure, spectrum, and dipole moment of HOONO" (2006)

Selected Publications

First author Publications

  1. Drouin, B.J., "Practical uses of SPFIT", J. Molec. Spectrosc. 340, 1-15, 2017.
  2. Drouin, B.J., Crawford, T.J., Yu, S., "Validation of ozone intensities at 10 μm with THz spectrometry", J. Quant. Spectrosc. Radiat. Trans. 203 282-292, 2017.
  3. Drouin, B.J., D.C. Benner, L.R. Brown, M.J. Cich, T.J. Crawford, V.M. Devi, A. Guillaume, J.T. Hodges, E.J. Mlawer, D.J. Robichaud, F. Oyafuso, V. J. Payne, K. Sung, E.H. Wishnow, S. Yu, "Multispectrum analysis of the Oxygen A-band." J. Quant. Spectrosc. & Radiat. Trans. 186, 118-138, 2017.
  4. Drouin, B.J., A. Tang, E. Schlecht, E, Brageot, Q.J. Gu, Y. Ye, R. Shu, M.C.F Change and Y. Kim, "A CMOS millimeter-wave transceiver embedded in a semi-confocal Fabry-Perot cavity for molecular spectroscopy", J. Chem. Phys. 145(7) 074201, 2016.
  5. Drouin, B.J., V. Payne, F. Oyafuso, K. Sung, E. Mlawer, “Pressure broadening of oxygen by water”, J. Quant. Spectrosc. & Radiat. Trans., 133 190-198 2014.
  6. Drouin, B.J., S. Yu, B. M. Elliott, T. J. Crawford, C. E. Miller, “High resolution spectral analysis of oxygen. III. Laboratory investigation of the airglow bands”, J. Chem. Phys. 139, 144301, 2013.
  7. Drouin B.J., J.C. Pearson, S. Yu, H. Gupta “Characterization and use of a 1.3-1.5 THz multiplier chain for molecular spectroscopy.” (invited paper) IEEE-TST 3(3) 314-321, 2013.
  8. Drouin B.J. “Isotopic Spectra of the Hydroxyl Radical” J. Phys. Chem. A 117(39) 10076-10091, 2013.
  9. Drouin, B.J., L. Wiesenfeld, "Low-Temperature water-hydrogen-molecule collisions probed by pressure broadening and line shift", Phys. Rev. A 86, 022705, 2012.
  10. Drouin, B.J., H. Gupta, S. Yu, C.E. Miller, H.S.P. Mueller, "High resolution spectral analysis of oxygen. II. Rotation al spectra of a a 1Δg O2 isotopologues", J. Chem. Phys. 136, 2012.
  11. Drouin B.J., S. Yu, J. C. Pearson, H. Gupta, "Terahertz Spectroscopy for Space Applications, 2.5-2.7: THz Spectra of HD, H2O and NH3" Journal of Molecular Structure Special Issue on THz Spectroscopy, 1006, 2-12, 2011.
  12. Drouin B.J., S. Yu, "Acetylene Spectra near 2.6 THz" Journal of Molecular Spectroscopy 269(2), 254-256, 2011.
  13. Drouin B.J., S. Yu, C.E. Miller, H.S.P. Mueller, F. Lewen, S.Bruenken, H. Habara, "Terahertz spectroscopy of oxygen,O2, 3Σg and 1Δ electronic states", Journal of Quantitative Spectroscopy and Radiative Transfer, 111, 1167-1173, 2010.
  14. Drouin B.J., S. Yu, J.C. Pearson, H.S.P. Mueller, "High resolution spectroscopy of CH3D and 13CH3D", Journal of Quantitative Spectroscopy and Radiative Transfer 110(18) 2077-2081, 2009.
  15. Drouin, B.J., R. R. Gamache, "Temperature Dependent Air Broadened Linewidths of Ozone Rotational Transitions" Journal of Molecular Spectroscopy, 251(1-2), 1-3, 2008.
  16. Drouin, B.J., "Temperature dependent pressure induced linewidths of O2 and 18O16O transitions in nitrogen, oxygen and air", Journal of Quantitative Spectroscopy and Radiative Transfer, 105 (3): 450-458, 2007.
  17. Drouin, B.J., "Submillimeter measurements of N2 and air broadening of hypochlorous acid," Journal of Quantitative Spectroscopy and Radiative Transfer, 103 (3): 558-564, 2007.
  18. Drouin, B.J., J. C. Pearson, A. Walters, V. Lattanzi "THz Measurements of Propane" Journal of Molecular Spectroscopy, 240 (2): 227-237, 2006.
  19. Drouin, B. J., F.W. Maiwald, "Extended THz measurements of nitrous oxide, N2O," Journal of Molecular Spectroscopy, 236 (2): 260-262, 2006.

Recent Peer-reviewed Non-first Author Publications

  1. L’Ecuyer, T.S., Drouin, B.J., Anheuser, J., Grames M., Henderson, D., Huang, X., Kahn, B.H., Kay, J.E., Lim, B.H., Mateling, M., Merrelli, A., Miller, N.B., Padmanabhan, S., Peterson, C., Schlegel, N.-J., White, M.L., Xie, Y., “The Polar Radiant Energy in the Far-InfraRed Experiment: A New Perspective on Polar longwave Energy Exchanges,” Bulletin of the American Meteorological Society (BAMS), accepted 2021.
  2. Pearson, J.C., Drouin, B.J., Yu. S., “Instrumentation for THz Spectroscopy in the Laboratory and in Space”, IEEE Journal of Microwaves, Vol. 1, Iss. 1, 2021 (invited paper to inaugural journal issue)
  3. Sung, K., Wishnow, E.H., et al., "FTS measurements of O2 collision-induced absorption in the 565-700 nm region using a high pressure gas absorption cell", J. Quant. Spectrosc. & Radiat. Trans. 235, 232-243, 2019.
  4. Ilyushin, V., Armieieva, I., et al., "The torsional fundamental band and high-J rotational spectra of the ground, first and second excited torsional states of acetone", J. Molec. Spectrosc. 363, 111169, 2019
  5. Karman, T., Gordon, I.E., et al., "Update of the HITRAN collision-induced absorption section", Icarus 328, 160-175, 2019.
  6. Kim, Y., Zhang, Y., Reck, T.J., Nemchick, D.J., Chattopadhyay, G., Drouin, B., Chang, M.C.F., Tang, A., "A 183-GHz InP/CMOS-Hybrid heterodyne-spectrometer for spaceborne atmospheric remote sensing", IEEE Trans. THz Sci. & Tech. 9(3), 313-334, 2019.
  7. Birk, M., Wagner, G., Gordon I.E., Drouin, B.J., "Ozone intensities in the rotational bands", J. Quant. Spectrosc. & Radiat. Trans. 226, 60-65, 2019.
  8. O'Dell, C.W., Eldering, A., et al., "Improved retrievals of carbon dioxide from Orbiting Carbon Observatory-2 with the version 8 ACOS algorithm", Atm. Meas. Tech. 11(12) 6539-6576, 2018.
  9. Pearson, J., Yu, S., Pearson, J., Sung, K., Drouin, B., Pirali, O., "Extended measurements and an experimental accuracy effective Hamiltonian model for the 3v2 and v4+v2 states of ammonia", J. Molec. Spectrosc. 353, 60-66, 2018.
  10. Nemchick, D.J., Drouin, B.J., Cich, M.J., Crawford, T., Tang, A.J., Kim, Y., Reck, T.J., Schlecht, E.T., Chang, M.C.F., Virbila, G. "A 90-102 GHz CMOS based pulsed Fourier transform spectrometer: New approaches for in situ chemical detection and millimeter-wave cavity-based molecular spectroscopy." Rev. Sci. Instr. 89(7), 073109, 2018.