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 Earth Surface Science: People
Simon Hook's Picture
Jet Propulsion Laboratory
M/S 183-501
4800 Oak Grove Drive
Pasadena, CA 91109

Simon Hook

Simon Hook is a geologist in the Earth Surface Science Group, Climate, Oceans and Solid Earth Science Section. His research is focused on improving our understanding of geologic and hydrodynamic processes on Earth and other planets. He is currently leading an international team of interdisciplinary scientists to relate recent observations of Mars to terrestrial environments and their relationship to water and life.

Simon is an expert on optical radiometry, in particular thermal infrared spectroscopy. He is a member of several instrument teams including AATSR, ASTER, MODIS, Landsat (5 and 7) and NPP. He has developed validation sites at Lake Tahoe, CA/NV and Salton Sea, CA for determining the absolute radiometry of airborne and spaceborne mid and thermal infrared radiometers and surface temperature retrieval algorithms. The measurements at the site are unique and now used as an absolute reference standard for multiple instruments developed by both domestic and foreign research agencies.

Simon continues to develop new instrumentation in support of scientific studies. He recently demonstrated a new design for a hyperspectral thermal imager in the laboratory using a QWIPS detector. He is now leading an effort to build an airborne hyperspectral thermal imager called HyTES in support on the NRC Recommended HyspIRI mission.

A key aspect of Simon's research is the development of new techniques to analyze and extract critical information from optical remotely sensed data, in particular, temperature and emissivity. Techniques developed by Simon are widely used by researchers and have also been incorporated into commercial packages.

Simon is actively involved in planning activities at NASA and other agencies for future missions. He is a co-lead on the NRC Recommended HyspIRI mission study ( He is also the chair of the JPL Science and Technology Advisory Committee which reports to the Chief Scientist and Technologist on how to improve research life at JPL.

  • B.S. in Geological Sciences - University of Durham, England (1982)
  • M.Sc. in Geological Sciences - University of Edmonton, Canada (1985)
  • Ph.D. in Geological Sciences - University of Durham, England (1989)


HyspIRI Mission Study Icon HyspIRI Mission Study
The Hyperspectral Infrared Imager or HyspIRI mission will study the world’s ecosystems and provide critical information on natural disasters.

The MODIS/ASTER (MASTER) airborne simulator is a joint development involving the Airborne Sensor Facility at the Ames Research Center, the Jet Propulsion Laboratory and the EROS Data Center.

Professional Experience
  • Jet Propulsion Laboratory (1991-present)
    • Principal Scientist (2006-present)
    • Research Scientist (1996-2006)
    • Lead Scientist New Millennium Program Earth Science (2003-present)
    • Project Scientist, Advanced Spaceborne Thermal Emission Reflectance Radiometer (ASTER) (1993-2003)
    • Member of Technical Staff (1991-1996)
  • University of Nevada, Reno - Adjunct faculty (2001-present)

Selected Publications
(39 Publications in Web of Science)
  1. Hall, D. K., J. E. Box, K. A. Casey, S. J. Hook, C. A. Shuman and K. Steffen, 2008. Comparison of Satellite-Derived Ice and Snow Surface Temperatures over Greenland with in-situ Observations. Remote Sensing of Environment, vol 112, pp. 3739-3749.
  2. Hulley, G. C. and S. J. Hook, 2008. A New Methodology for Cloud Detection and Classification with ASTER data. Geophysical Research Letters, vol. 35.
  3. Hulley, G. C. and S. J. Hook, 2008 The First Gridded ASTER Land Surface Emissivity Database of California and Nevada. Geophysical Research Letters, vol. 35.
  4. Vaughan, R.G., M. Kervyn, V. J. Realmuto, M. J. Abrams, and S. J. Hook, 2008. Satellite Thermal Infrared Measurements of Recent Volcanic Activity at Oldoinyo Lengai, Tanzania. Journal of Volcanology and Geothermal Research, vol. 173, pp. 196-206.
  5. Sentlinger, G. I., S. J. Hook and B. Laval, 2008. Sub-pixel water temperature estimation from thermal-infrared imagery using vectorized lake features. Remote Sensing of Environment, vol. 112, pp. 1678-1688.
  6. IInamdar, A. K., A. French, S. Hook, G. Vaughan and W. Luckett, 2008. Land Surface Temperature Retrieval at High Spatial and Temporal Resolutions over the Southwestern US, vol. 113, D07107, 18p.
  7. Marti-Cardona, B., Steissberg, T. E., Schladow, S. G. and S. J. Hook, 2008. Relating Fish Kills to Upwellings and Wind Patterns in the Salton Sea. Hydrobiologica, vol. 604, pp. 85-95.
  8. Barsi, J. A., S. J. Hook, J. R. Schott, N. G. Raqueno, B. L. Markham, 2007. Landsat-5 thematic mapper thermal band calibration update. IEEE Geoscience and Remote Sensing Letters, vol. 4 pp. 552-555.
  9. Hook, S. J., R. G. Vaughan, H. Tonooka and S. G. Schladow, 2007. Absolute Radiometric In-Flight Validation of Mid Infrared and Thermal Infrared Data From ASTER and MODIS on the Terra Spacecraft Using the Lake Tahoe, CA/NV, USA, Automated Validation Site. IEEE Transactions Geoscience and Remote Sensing, vol. 45, pp. 1798-1807
  10. Crippen, R. E., S. J. Hook, E. J. Fielding, 2007. Nighttime ASTER thermal imagery as an elevation surrogate for filling SRTM DEM voids. Geophysical Research Letters, vol. 34.
  11. Vaughan, R. G and S. J. Hook, 2007. Using satellite data to characterize the temporal thermal behavior of an active volcano: Mount St. Helens, WA. Geophysical Research Letters, vol. 33.
  12. Tonooka, H., F. Palluconi, S. Hook, and T.Matsunaga, 2005. Vicarious Calibration of ASTER Thermal Infrared Bands. IEEE Transactions Geoscience and Remote Sensing, vol. 43 pp. 2733-2746.
  13. Steissberg; T. E., S. J. Hook and S. G. Schladow, 2005. Characterizing Partial Upwellings and Surface Circulation at Lake Tahoe, CA/NV, USA with Thermal Infrared Images. Remote Sensing of Environment, vol. 99, pp. 2-15.
  14. Vaughan, R. G., S. J. Hook, W. M. Calvin and J. V. Taranik, 2005. Surface Mineral Mapping at Steamboat Springs, Nevada with Multi-wavelength Thermal Infrared Images. Remote Sensing of Environment, vol. 99, pp. 140-158.
  15. Vaughan, R. G., S. J. Hook, M. S. Ramsey, V. J. Realmuto and D. J. Schneider, 2005. Monitoring Eruptive Activity at Mount St. Helens with TIR Image Data. Geophysical Research Letters, vol. 32.
  16. Hook, S. J., Clodius, W. B and L. Balick, R. E. Alley, A. Abtahi, R. C. Richards and S. G. Schladow, 2005. In-Flight Validation of Mid and Thermal Infrared Data from the Multispectral Thermal Imager (MTI) Using an Automated High Altitude Validation Site at Lake Tahoe CA/NV, USA. IEEE Transactions Geoscience and Remote Sensing, vol. 43, pp. 1991-1999.
  17. Steissberg; T. E., S. J. Hook and S. G. Schladow, 2005. Measuring Surface Currents in Lakes with High Spatial Resolution Thermal Infrared Imagery. Geophysical Research Letters, vol 32.
  18. Hook, S. J., J. E. Dmochowski, K. A. Howard, L. C. Rowan and K. E. Karlstrom and J. M. Stock, 2005. Mapping variations in weight percent silica measured from multispectral thermal infrared imagery - Examples from the Hiller Mountains, Nevada, USA and Tres Virgenes-La Reforma, Baja California Sur, Mexico. Remote Sensing of Environment, vol. 95, pp. 273-289.
  19. Hook, S. J., G. Chander, J. A. Barsi, R. E. Alley, A. Abtahi, F. D. Palluconi, B. L. Markham, R. C. Richards, S. G. Schladow, and D. L. Helder, 2004. In-Flight Validation and Recovery of Water Surface Temperature with Landsat 5 Thermal Infrared Data Using an Automated High Altitude Lake Validation Site at Lake Tahoe CA/NV, USA. IEEE Transactions Geoscience and Remote Sensing, vol. 42, pp. 2767- 2776, 2004.
  20. Schladow, S. G., S. O. Palmarsson, T. E. Steissberg, S. J. Hook and A. J. Prata, 2004. An Extraordinary Upwelling Event in a Deep Thermally Stratified Lake. Geophysical Research Letters, vol. 31, 2004.
    For earlier papers see the The Web of Science.

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