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Gregory Halverson

Photo of Gregory Halverson


4800 Oak Grove Drive
M/S 233-300

Pasadena, CA 91109



Curriculum Vitae:

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Member of:

Carbon Cycle And Ecosystems


Gregory develops geospatial data processing software for remote sensing systems. Current projects include a re-design of the ECOSTRESS product generation software, daily high-resolution remote sensing data fusion techniques, thermal stress on coral reefs, thermal habitat compression in the California Bay Delta, and evapotranspiration monitoring applications in the western states.


  • M.Sc. Geographic Information Science,California State University, Northridge (2018)
  • A.A. Computer Programming,Los Angeles Pierce College (2015)
  • B.A. History,California State University, Northridge (2010)
  • A.A. Psychology,Los Angeles Pierce College (2009)

Professional Experience

Jet Propulsion Laboratory, Pasadena, CA (2015-Present)

  • Scientific Applications Software Engineer (2019-Present)
  • JPL Visiting Student Research Program (California State University Northridge) (2017-2019)
  • Year-Round Internship (Columbus Technologies & Services) (2016-2017)
  • NASA DEVELOP Costa Rica Agriculture (2016)
  • Volunteer Agreement (2015-2016)
  • NASA DEVELOP New Mexico Water Resources (2015)

Research Interests

  • Drought monitoring
  • Evapotranspiration
  • Land-surface temperature
  • Water temperature
  • Geospatial data science
  • Computer programming

Selected Publications

  1. Halverson, G., Lee, C., Hulley, G., Hestir, E., Cawse-Nicholson, K., Hook, S., Bergamaschi, B., Acuña, S., Tuffilaro, N., Radocinski, R., Rivera, G., Ade, C., Sommer, T. "Decline in Thermal Habitat Conditions for the Endangered Delta Smelt as Seen from Landsat Satellites (1985-2019)" (in preparation)
  2. Halverson, G., Lee, C., Hulley, G., Hestir, E., Cawse-Nicholson, K., Bergamaschi, B., Palmieri, B., Osti, A., Acuña, S., Tuffilaro, N., Radocinski, R., Rivera, G., Ade, C., Sommer, T. "Multi-Decadal Examination of Thermal Habitat Suitability for the Endangered Delta Smelt in the San Francisco Estuary using Landsat 5, 7, and 8" (in preparation)
  3. Halverson, G., Cawse-Nicholson, K., Fisher, J., Braverman, A., Johnson, M., Kang, E., Li, M., Gunson, M., Hook, S. "Statistical Uncertainty Quantification and Sensitivity Analysis for the ECOSTRESS PT-JPL Evapotranspiration Algorithm" (in preparation)
  4. Fisher, J.B., Lee, B., Purdy, A.J., Halverson, G.H., Dohlen, M.B., Cawse-Nicholson, K., Wang, A., Anderson, R.G., Aragon, B., Arain, M.A., Baldocchi, D.D., Baker, J.M., Barral, H., Bernacchi, C.J., Bernhofer, C., Biraud, S.C., Bohrer, G., Brunsell, N., Cappelaere, B., Castro-Contreras, S., Chun, J., Conrad, B.J., Cremonese, E., Demarty, J., Desai, A.R., De Ligne, A., Foltýnová, L., Goulden, M.L., Griffis, T.J., Grünwald, T., Johnson, M.S., Kang, M., Kelbe, D., Kowalska, N., Lim, J.-H., Maïnassara, I., McCabe, M.F., Missik, J.E.C., Mohanty, B.P., Moore, C.E., Morillas, L., Morrison, R., Munger, J.W., Posse, G., Richardson, A.D., Russell, E.S., Ryu, Y., Sanchez-Azofeifa, A., Schmidt, M., Schwartz, E., Sharp, I., Šigut, L., Tang, Y., Hulley, G., Anderson, M., Hain, C., French, A., Wood, E., Hook, S., in press. "ECOSTRESS: NASA's next generation mission to measure evapotranspiration from the International Space Station" Water Resources Research
  5. Cawse-Nicholson. K., Braverman, A., Kang, E., Li, M., Johnson, M., Halverson, G., Anderson, M., Hain, C., Gunson M., Hook S. (2020) "Sensitivity and uncertainty quantification for the ECOSTRESS evapotranspiration algorithm-DisALEXI" International Journal of Applied Earth Observation and Geoinformation, 89,
  6. Cooley, S., Williams, C., Lee, C., Fisher, J., Perret, J., Halverson, G. (2019) ,"Improving drought assessment with evapotranspiration data: a case study in Guanacaste, Costa Rica" Ecological Applications, 29(2),
  7. Purdy, A., Fisher, J., Goulden, M., Colliander, A., Halverson, G., Tu, K., Famiglietti, J. (2018) "SMAP soil moisture improves global evapotranspiration" Remote Sensing of Environment,, 219,
  8. Famiglietti, C., Fisher, J., Halverson, G., Borbas, E. (2018) "Global Validation of MODIS Near-Surface Air Temperature and Dew Point" AGU Geophysical Research Letters, 45
  9. Colliander, A., Fisher, J., Halverson, G., Merlin, O., Misra, S., Bindlish, R., Jackson, T., Yueh, S. (2017) "Spatial Downscaling of SMAP Soil Moisture Using MODIS Land Surface Temperature and NDVI During SMAPVEX15" IEEE Geoscience and Remote Sensing Letters, 14 (11),