DONALD M. HASSLER

Born: Dec. 19, 1961

US Citizenship

Education

Ph.D. Physics, University of Colorado, Boulder, 1990.

M.S. Physics, University of Colorado, Boulder, 1988.

B.A. Physics, Kenyon College, Gambier, Ohio, 1984.

Employment

Senior Research Scientist (3/97 - present)

Section Manager (9/99 - present)

Instrumentation and Space Research Division

Southwest Research Institute, Boulder, CO

Adjunct Professor, Dept. of Astrophysical and Planetary Sciences

University of Colorado

Boulder, CO (12/03 - present)

Scientist, High Altitude Observatory

National Center for Atmospheric Research

Boulder, CO (12/93 - 3/97)

Physicist, Harvard-Smithsonian Center for Astrophysics

Cambridge, MA (1/92 - 12/93)

NSF-NATO Postdoctoral Fellow, Institut d'Astrophysique Spatiale

Verrieres-le-Buisson and Orsay, France (6/91 - 12/91, 1/94 - 7/94)

Research Associate, Laboratory for Atmospheric and Space Physics

University of Colorado, Boulder, CO (1/91 - 6/91)

Community Service

NASA Sun-Earth System Roadmap Committee member, 2004-2006

NASA Solar Probe Science and Technology Definition Team member, 2003-2005

ESA Solar Orbiter Remote Sensing Working Group member, 2002-2003.

NASA Sun-Earth Connection Roadmap Committee member, 2001-2002.

NASA LWS Solar Dynamics Observatory Science Definition Team member, 2000-2001.

Biographical Sketch

Dr. Hassler is a Senior Research Scientist and Section Manager in the Department of Space Studies at SwRI. He has an experimental background in ultraviolet spectroscopy and the characterization of space instruments. His current research interests include the development and characterization of new space instrumentation, detector physics, ultraviolet spectroscopy, the dynamics of the solar atmosphere and solar wind, and characterization of the Mars radiation environment. He is currently Principle Investigator of a NASA sounding rocket program to build a next generation UV spectrograph, called RAISE (Rapid Acquisition Imaging Spectrograph), as well as Principle Investigator of two IR&D projects to develop new instrumentation for future Mars missions (“The Mars-Sun Connection and the Impact of Solar Variability on Mars Weather and Climate: An Experiment Concept Study”). He has been either PI or Co-I on seven previous sounding rocket flights and participated in the instrument development, calibration and data analysis for the first successful flight of the Spartan 201-1 satellite flown on the Space Shuttle (STS-56). He is a funded Co-Investigator on the SOHO, STEREO and SDO missions. He is also a member of the NASA Solar Probe Science and Technology Definition Team, the ESA Solar Orbiter Science Payload Working Group, the NASA LWS/SDO Science Definition Team, the 2002 NASA Sun-Earth Connection Roadmap Committee, and the 2006 Sun-Earth System Roadmap committee.

Publications

Hassler, D.M., D.H. Grinspoon, S. Rafkin, S. Perrier, J.-L. Bertaux, 2004. Diurnal, Seasonal, Solar Cycle and Episodic Effects of Space Weather at Mars, Icarus, in preparation.

Hassler, D. M., 2003. The "Mars-Sun Connection" and the Impact of Solar Variability on Mars Weather and Climate, BAAS, 35, 1409.

Hassler, D.M., 2003. Solar Probe: Mission to the Sun (Overview and Status Report), Proc. SPIE, 4853, 180.

Hassler, D.M., C.E. DeForest, and D.C. Slater, 2003. EUV Solar Spectroscopic Explorer (ESSEX): Mission Concept for a Next Generation Imaging Spectrograph, Proc. SPIE, 4853, 71.

Hassler, D.M. and E. Buchlin, 2002. SUMER Observations of an Equatorial Coronal Hole, Ap. J. Lett., in preparation.

Hassler, D.M., 2000. Spectroscopic Observations of Polar Plumes with SOHO/SUMER, Publications of the Astronomical Society of the Pacific, 205, 83.

Hassler, D. M., I.E. Dammasch, P. Lemaire, P. Brekke, W. Curdt, H. Mason, J.-C. Vial, K. Wilhelm, 1999. Solar Wind Outflow and the Chromospheric Magnetic Network, Science, 283, 810.

Hassler, D.M., D. Slater, R. Smartt, & S. Koutchmy, 1998. SOPHIE: A Solar EUV Multi-layer Reflecting Coronagraph, Proc. SPIE, 3443, 61.

Hassler, D.M., P. Lemaire, Y. Longval, 1997. Polarization Sensitivity of the SUMER Instrument on SOHO, Applied Optics, 36, 353.

Hassler, D. M., K. Wilhelm, P. Lemaire, U. Schuehle, 1997. Observations of Polar Plumes with the SUMER Instrument on SOHO, Solar Phys., 175, 375.

Hassler, D.M. and T.G. Moran, 1994. Broadening of Fe X (6374 Å) Profiles Above the Limb in a Coronal Hole, Space Science Reviews, 70, 373.

Hassler, D.M., L. Strachan, L. D. Gardner, J. L. Kohl, M. Guhathakurta, R.R. Fisher and K. Strong, 1994. Ly-a and White light Observations of a CME During the Spartan 201-1 Mission, Solar Dynamic Phenomena and Solar Wind Consequences, ESA SP-373, 363.

Hassler, D.M., L.D. Gardner and J.L. Kohl, 1992. Measuring Electron Temperature in the Extended Corona, Mass Supply and Flows in the Solar Corona, ESA SP-348, 375.

Hassler, D.M., G.J. Rottman and F.Q. Orrall, 1991. Systematic Radial Flows in the Chromosphere, Transition Region and Corona of the Quiet Sun, Ap. J., 372, 710.

Hassler, D.M., G.J. Rottman and G.M. Lawrence, 1991. Position Offsets in Curved Channel Microchannel Plate Detectors, Applied Optics, 30, 3575.

Hassler, D.M., G.J. Rottman and F.Q. Orrall, 1991. Absolute Velocity Measurements in the Solar Transition Region and Corona, Adv. Space Res., 11, 141.

Hassler, D.M., G.J. Rottman, E.C. Shoub and T.E. Holzer, 1990. Line Broadening of Mg x ll609 and 625 Coronal Emission Lines Observed Above the Solar Limb, Ap. J. Lett., 348, L77.

Auchere, F., D.M. Hassler, D. Slater, T.N. Woods, 2001. Sounding Rocket Inter-calibration of the EIT Instrument on SOHO, Solar Phys., 202, 269.

Auchere, F., D.M. Hassler, D. Slater, T.N. Woods, 1999. SwRI/LASP Sounding Rocket Inter-calibration with the EIT Instrument on SOHO, Proc. SPIE, 3765, 351.

Bookbinder, J., E.E. DeLuca, P. Cheimets, L. Golub, D.M. Hassler, C. Korendyke, P. Glenn, E. Silver, 2002. The Reconnection and Microscale (RAM) Solar-Terrestrial Probe, Proc. SPIE, 4853, in press.

Brekke, P., D.M. Hassler, U. Schuehle and K. Wilhelm, 1997. Doppler Shifts in the Solar Transition Region and Corona of the Quiet Sun Observed with SUMER on SOHO, Solar Phys., 175, 349.

Brekke, P., D.M. Hassler and K. Wilhelm, 1997. Systematic Redshifts in the Quiet Sun Transition Region and Corona Observed with SUMER on SOHO, Proc. 5th SOHO Workshop, ESA SP-404, 229.

Brekke, P., D.M. Hassler, 1995. Needs for Improved Laboratory Wavelengths in the EUV, Laboratory and Astronomical High Resolution Spectra, ASP Conf. Series, A.J. Sauval, R. Blomme, and N. Grevesse, eds., 81, 589.

Buchlin, E. and D.M. Hassler, 2000. Recent SOHO/SUMER Observations of a Polar and Equatorial Coronal Hole, BAAS, 32(2), 810.

Dammasch, I.E., K. Wilhelm, W. Curdt, and D.M. Hassler, 1999. The Ne VIII 770 Å Resonance Line: Solar Wavelengths Determined by SUMER on SOHO, A&A, 346, 285.

Dammasch, I.E., D.M. Hassler, W. Curdt, and K. Wilhelm, 1999. Statistical Analysis of EUV Lines Inside and Outside of Solar Coronal Holes, Space Sci. Rev., 87, 161.

Dammasch, I.E., D.M. Hassler, K. Wilhelm and W. Curdt, 1999. Solar MgX and Fe XII Wavelengths Measured by SUMER, Proc. of the 8th SOHO Workshop, ESA SP-446, 263.

DeForest, C.E., J.T. Hoeksema, J.B. Gurman, B. Thompson, R. Howard, S.P. Plunkett, R. Harrison, D. Hassler, 1997. A Comprehensive Observation of Polar Plumes, Solar Phys., 175, 393.

Durda, D. D., S. A. Stern, W. B. Colwell, J. Wm. Parker, H. F. Levison, and D. M. Hassler 2000. A new observational search for Vulcanoids in SOHO/LASCO Coronagraph images, Icarus, in press.

Elmore, D.F., G.L. Card, C.W. Chambellan, D.M. Hassler, H.L. Hull, A.R. Lecinski, R.M. MacQueen, K.V. Streander, J.L. Streete, and O.R. White, 1998. Chromospheric Helium Imaging Photometer, Appl. Optics, 37, 4270.

Feldman, U., I.E. Dammasch, K. Wilhelm, P. Lemaire, D. M. Hassler, 2003. SOHO SUMER Atlas: Images of the Solar Upper Atmosphere from SUMER on SOHO, ESA SP-1274.

Gardner, L.D., D.M. Hassler, L. Strachan, J.L. Kohl, 1994. Spartan 201 Observations of the Ultraviolet Extended Solar Corona, Solar Coronal Structures, Proc. of IAU Colloq. No. 144, eds. V. Rusin, P. Heinzel, J.C. Vial, p. 631.

Golub, L. and D.M. Hassler, 2000. High Resolution Coronal Imaging with Multilayers, Adv. Space Res., in press.

Handy, B.N., D.M. Hassler, D. Slater, T.N. Woods, 2002. SwRI/LASP Sounding Rocket Lyman-alpha Intercalibration with the Transition Region and Coronal Explorer, Solar Phys., in preparation.

Kohl, J.L., L.D. Gardner, L. Strachan and D.M. Hassler, 1994. Ultraviolet Spectroscopy of the Extended Solar Corona During the Spartan 201 Mission, Space Science Reviews, 70, 253.

Kopp, G., M. Derks, D.F. Elmore, D.M. Hassler, J. Woods, J. Streete, J. Blankner, 1997. Tunable Liquid Crystal Filter for Solar Imaging at Helium I 1083 nm. Applied Optics, 36, 291.

Landi, E., D. Mullan, G. Poletto, D.M. Hassler, K. Wilhelm, 1999. Plasma Flows and Mass Flux in Coronal Hole Regions, Proc. 8th SOHO Workshop, ESA SP-446, 417.

Lemaire, P., K. Bocchialini, K. Aletti, D.M. Hassler, K. Wilhelm, 1999. Search for Signaturesof a Coronal Holein Transition Region Lines Near Disk Center, Space Sci. Rev., 87, 249.

Lemaire, P., K. Wilhelm, W. Curdt, U. Schuhle, E. Marsch, A.I. Poland, S.D. Jordan, R.J. Thomas, D.M. Hassler, M.C.E. Huber, J.-C. Vial, M. Kuhne, O.H.W. Siegmund, A. Gabriel, J.G. Timothy, M. Grewing 1997. First Results of the SUMER Telescope and Spectrometer - Solar Ultraviolet Measurements of Emitted Radiation - on SOHO: (II) Imagery and Data Management, Solar Phys., 170, 105.

Lemaire, P., K. Wilhelm, W. Curdt, U. Schuehle, A.I. Poland, S.D. Jordan, R.J. Thomas, D.M. Hassler, J.-C. Vial, 1997. High Resolution Solar Ultraviolet Measurements, Adv. Space Res., 20, 2249.

Rottman, G.J., D.M. Hassler, M.D. Jones and F.Q. Orrall, 1990. The Systematic Radial Downflow in the Transition Region of the Quiet Sun from Limb-to-Limb Observation of the C iv Resonance Lines, Ap. J. , 358, 693.

Strachan, L., L.D. Gardner, D.M. Hassler and J.L. Kohl, 1994. Preliminary Results from Spartan 201: Coronal Streamer Observations, Space Science Reviews, 70, 263.

Strachan, L., L.D. Gardner, D.M. Hassler, J.L. Kohl, S. Fineschi and M. Romoli, 1993. Radiometric Calibration of UVCS/SOHO and UVC/SPARTAN, Proceedings of the Ninth Workshop on the Vacuum Ultraviolet Calibration of Space Experiments, Boulder, CO, March 10-11, 1993.

Warren, H.P., and D.M. Hassler, 1999. The Density Structure of a Solar Polar Coronal Hole, J. Geophys. Res., 104, 9781.

Wilhelm, K., I.E. Dammasch, E. Marsch, and D.M. Hassler, 2000. On the Source Regions of the Fast Solar Wind in Polar Coronal Holes, A&A, 353, 749.

Wilhelm, K., P. Lemaire, I.E. Dammasch, J. Hollandt, U. Schuehle, W. Curdt, T. Kucera, D. M. Hassler, M.C.E. Huber, 1999. Solar Irradiances of UV and EUV Lines during the Minimum of Sunspot Activity in 1999, Adv. Space Res., 24, 229.

Wilhelm, K., E. Marsch, B. N. Dwivedi, D.M. Hassler, P. Lemaire, A. Gabriel, M.C.E. Huber, 1998. The Corona Above Polar Coronal Holes as seen by SUMER on SOHO, Ap. J., 500, 1023.

Wilhelm, K., P. Lemaire, I.E. Dammasch, J. Hollandt, U. Schuehle, W. Curdt, T. Kucera, D. M. Hassler, M.C.E. Huber, 1998. Solar Radiances and Irradiances of UV and EUV Lines during the Minimum of Sunspot Activity in 1996, A & A, 334, 685.

Wilhelm, K., P. Lemaire, W. Curdt, U. Schuhle, E. Marsch, A.I. Poland, S.D. Jordan, R.J. Thomas, D.M. Hassler, M.C.E. Huber, J.-C. Vial, M. Kuhne, O.H.W. Siegmund, A. Gabriel, J.G. Timothy, M. Grewing, U. Feldman, J. Hollandt and P. Brekke 1997. First Results of the SUMER Telescope and Spectrometer - Solar Ultraviolet Measurements of Emitted Radiation - on SOHO: (I) Spectra and Spectroradiometry, Solar Phys., 170, 75.

Wilhelm, K., W. Curdt, E. Marsch, U. Schuhle, A. Gabriel, P. Lemaire, J.-C. Vial, M. Grewing, D. Hassler, M.C.E. Huber, S.D. Jordan, A.I. Poland, R.J. Thomas, M. Kuhne, J.G. Timothy, and O.H.W. Siegmund 1995. SUMER - Solar Ultraviolet Measurements of Emitted Radiation. Solar Physics, 162, 189.

Recent Invited Talks/Presentations

“The Radiation Assessment Detector (RAD) for the Mars MSL Mission”, 9^th Workshop on Radiation Monitoring on the International Space Station, Vienna, Sept. 2004.

“ Diurnal, Seasonal, Solar Cycle and Episodic Effects of Space Weather at the Martian Surface”, Spring AGU Meeting, Montreal, April 2004.

“ The "Mars-Sun Connection" and the Impact of Solar Variability on Mars Weather and Climate”, DPS Meeting, Monterey, CA, Sept. 2003.

"LWS Program Needs: Solar/Heliospheric Physics", Invited talk. NASA Living with a Star Workshop, APL, Maryland, 14 Nov. 2002.

"Solar Probe Remote Sensing", Invited talk. NASA Living with a Star Workshop, APL, Maryland, 13 Nov. 2002.

"EUV Solar Spectroscopic Explorer (ESSEX): A Next Generation Imaging Spectrograph to Explore the Dynamic Sun", Invited talk. SPIE Meeting, Waikoloa, Hawaii, 24 Aug. 2002.

"Solar Probe: Mission to the Sun (Overview/Status Report)", Invited talk. SPIE Meeting, Waikoloa, Hawaii, 23 Aug. 2002.

"Coronal Magnetic Field Structure: Open vs Closed Field Lines, Coronal Holes vs Streamers", Invited talk. Magnetic Coupling of the Solar Atmosphere: IAU Colloq. 188, Santorini, Greece, 14 June. 2002.

"SwRI Rocket Observations of Ly-alpha", Invited talk. French LYOT Mission Workshop, Orsay, France, 6 Jun 2002.

"Ly-alpha Spectroscopy and Space Weather". French LYOT Mission Workshop, Orsay, France, 6 Jun 2002.

"Future Capabilities: Space-Based Solar Physics", Invited talk. Cool Stars 12 Meeting, Boulder, Colorado, 3 Aug. 2001.

"Solar Probe: Mission to the Sun", Invited talk. AAS/SPD Meeting, Boston, MA, 30 May 2001.

"Review of Solar Orbiter Strawman Remote Sensing Instrument Package and Capabilities", Invited talk.. 1st ESA Solar Orbiter Workshop, Tenerife, Spain, 15 May 2001.

"Solar Probe: Mission to the Sun", Invited talk. COSPAR International Congress, Warsaw, Poland, 16 July 2000.

"High Resolution Coronal Imaging with Multilayers", Invited talk. COSPAR International Space Congress, Warsaw, Poland, 16 July 2000.

"Comparison of Outflow Properties of Equatorial and Polar Coronal Holes", Invited Talk. EGS Meeting, Nice, France, 18 May 2000.

"The 4th Dimension: The Need for High Resolution Imaging Spectroscopy". NASA Living with a Star Workshop, Greenbelt, Maryland, 9 May 2000.

"Spectroscopic Observations of Polar Plumes with SOHO/SUMER", Invited talk. The Last Total Solar Eclipse of the Millennium Symposium, Instanbul, Turkey, 13-15 Aug. 1999.

"The Source Region of the High Speed Solar Wind", Invited talk, Physics of the Solar Corona and Transition Region Workshop, Monterey, Calif., 26 Aug. 1999.

Public Outreach/Television Interviews/Press Releases

"The Source Region of the Solar Wind", Interview. CBS Evening News with Dan Rather, 4 Feb. 1999.

"SOHO Spacecraft Detects Source of High Speed "Wind" from the Sun", Press Release. NASA Press Release, 4 Feb. 1999.

"The SOHO Mission", Interview. The Real Moment of Science Talk Show, PBS, 20 April 1998.

"Solar Eclipses", Interview. The Real Moment of Science Talk Show, PBS, 13 April 1998.

"The February 26 Total Solar Eclipse", Interview. The Discovery Channel, 27 Feb. 1998.