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 Terrestrial Hydrology: People
Andreas  Colliander's Picture
Jet Propulsion Laboratory
M/S 300-323
4800 Oak Grove Drive
Pasadena, CA 91109
818 354-0270
Curriculum Vitae:

Andreas Colliander

Dr. Andreas Colliander is a Research Scientist in the Terrestrial Hydrology Group of the Science Division. His research interests include development of remote sensing techniques for geophysical parameter retrieval (including soil moisture) and estimating the impact of climate change on hydrologic cycle. He is currently mainly focused on NASA's SMAP (Soil Moisture Active and Passive) mission as a member of the science algorithm development team. His work addresses calibration and validation of the soil moisture, freeze/thaw and net ecosystem exchange products of the mission. Additionally, he has also been funded by NASA to develop uniform long-term soil moisture data product, and study calibration and inter-calibration issues of the SMAP, SMOS, Aquarius, AMSR-E and AMSR2 satellite instruments.

Dr. Colliander is a Senior Member of the IEEE, and serves as a co-lead of the Microwave Radiometer Working Group of the IEEE Geoscience and Remote Sensing Society.

  • Ph.D., Electrical Engineering, Helsinki University of Technology (2007)
  • M.S., Electrical Engineering, Helsinki University of Technology (2002)

Research Interests
  • Microwave remote sensing techniques, especially for hydrology applications.


SMAP - Soil Moisture Active Passive Icon SMAP - Soil Moisture Active Passive
The Soil Moisture Active Passive mission provides measurements of soil moisture, freeze/thaw state, as well as sea surface salinity and ocean wind.

Professional Experience
  • Jet Propulsion Laboratory, California Institute of Technology (2008 - Present)
    • Research Scientist, Surface Hydrology Group
  • European Space Agency, European Space and Technology Research Centre (ESTEC), The Netherlands (2007-2008)
    • Postdoctoral Research Fellow
  • Aalto University (formerly Helsinki University of Technology), Laboratory of Space Technology, Finland (2001-2007)
    • Research Scientist and Project Manager

Selected Awards
  • NASA Early Career Public Achievement Award (2017)
  • NASA Group Achievement Awards, (2013, 2016)

Selected Publications

Selected Peer-Reviewed Publications (out of about 70)

  1. Colliander, A., Z. Yang, R. Mueller, A. Sandborn, R. Reichle, W. Crow, D. Entekhabi, and S. Yueh. (2019). Consistency between NASS Surveyed Soil Moisture Conditions and SMAP Soil Moisture Observations. Water Resources Research. Accepted Article.
  2. Das, N.N., D. Entekhabi, R.S. Dunbar, M. J. Chaubell, A. Colliander, S. Yueh, T. Jagdhuber, F. Chen, W. Crow, P.E. O'Neill, A. Berg, D. D. Bosch, T. Caldwell, M.H. Cosh, C. Holifield Collins, E. Lopez-Baeza, M. Thibeault, J.P. Walker. (2019). The SMAP and Copernicus Sentinel 1A/B Microwave Active-Passive High Resolution Surface Soil Moisture Product. Remote Sensing of Environment, In Press.
  3. Chen, F., W.T. Crow, M.H. Cosh, A. Colliander, J. Asanuma, A. Berg, D.D. Bosch, T.G. Caldwell, C. Holifield Collins, K. Høgh Jensen, J. Martínez-Fernández, H. McNairn, P.J. Starks, Z. Su, and J.P. Walker. (2019). Uncertainty of Reference Pixel Soil Moisture Averages Sampled at SMAP Core Validation Sites. J. Hydrometeorology, Vol. 20, pp. 1553-1568.
  4. Colliander, A., M.H. Cosh, S. Misra, T.J. Jackson, W.T. Crow, J. Powers, H. McNairn, P. Bullock, A. Berg, R. Magagi, Y. Gao, R. Bindlish, R. Williamson, I. Ramos, B. Latham, P. O'Neill, S. Yueh. (2019). Comparison of high-resolution airborne soil moisture retrievals to SMAP soil moisture during the SMAP validation experiment 2016 (SMAPVEX16). Remote Sensing of Environment, Vol. 227, pp. 137-150, 10.1016/j.rse.2019.04.004.
  5. Purdy, A.J., J.B. Fisher, M.L. Goulden, A. Colliander, G. Halverson, K. Tu, J.S. Famiglietti, "Soil Moisture Improves Global Evapotranspiration," Remote Sens. Environ., Vol. 219, pp. 1-14, 2018.
  6. Colliander, A., T.J. Jackson, S.K. Chan, P. O'Neill, R. Bindlish, M.H. Cosh, T. Caldwell, J.P. Walker, A. Berg, H. McNairn, M. Thibeault, J. Martinez-Fernandez, K.H. Jensen, J. Asanuma, M.S. Seyfried, D.D. Bosch, P.J. Starks, C. Holifield Collins, J.H. Prueger, Z. Su, E. Lopez-Baeza, S.H. Yueh, "An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites," Remote Sensing of Environment, Vol. 207, pp. 65-70, 2018.
  7. Colliander, A., J.B. Fisher, G. Halverson, O. Merlin, S. Misra, R. Bindlish, T.J. Jackson, S. Yueh, "Spatial Downscaling of SMAP Soil Moisture using MODIS Land Surface Temperature and NDVI during SMAPVEX15," IEEE Geoscience and Remote Sensing Letters, Vol. 14, No. 11, 2017.
  8. Derksen, C., X. Xu, R.S. Dunbar, A. Colliander, Y. Kim, J. Kimball, A. Black, E. Euskirchen, A. Langlois, M. Loranty, P. Marsh, K. Rautiainen, A. Roy, "Retrieving Landscape Freeze/Thaw State from Soil Moisture Active Passive (SMAP) Radar and Radiometer Measurements," Remote Sensing of Environment, 194, 48-62, 2017.
  9. Colliander, A., J.T. Jackson, R. Bindlish, S. Chan, S.B. Kim, M.H. Cosh et al., "Validation of SMAP surface soil moisture products with core validation sites," Rem. Sens. Env., Vol. 191, pp. 215-231, 2017.
  10. Burgin, M.S., A. Colliander, E.G. Njoku, S.K. Chan, F. Cabot, Y. Kerr, R. Bindlish, T. Jackson, "A Comparative Study of the SMAP Passive Soil Moisture Product with Existing Satellite-Based Soil Moisture Products," IEEE Trans. Geosci. Rem. Sens., Vol. 55, No. 5, pp. 2959-2971, 2017.
  11. Chen, F., W.T. Crow, A. Colliander, et al., Application of Triple Collocation in Ground-Based Validation of Soil Moisture Active/Passive (SMAP) Level 2 Data Products, IEEE J. Sel. Topics App. Earth Obs. Rem., Sens., Vol. 10, No. 2, 2017.
  12. Colliander, A., E.G. Njoku, T.J. Jackson, S. Chazanoff, H. McNairn, J. Powers, M.H. Cosh. (2016). Retrieving soil moisture for non-forested areas using PALS radiometer measurements in SMAPVEX12 field campaign. Remote Sensing of Environment, Vol. 184, pp. 86-100, 2016.
  13. Chan, S.K., R. Bindlish, P.E. O'Neill, E.G. Njoku, T.J. Jackson, A. Colliander, et al., "Assessment of the SMAP Passive Soil Moisture Product," IEEE Transactions on Geoscience and Remote Sensing, Vol. 54, No. 8, pp. 2016.
  14. Colliander, A., Jackson, T., McNairn, H., Chazanoff, S., Dinardo, S., Latham, B., O'Dwyer, I., Chun, W., Yueh, S., Njoku, E., "Comparison of Airborne Passive and Active L-band System (PALS) Brightness Temperature Measurements to SMOS Observations during the SMAP Validation Experiment 2012 (SMAPVEX12), " IEEE Geoscience Remote Sensing Letters, Vol. 12, No. 4, April 2015.
  15. McNairn, H., Jackson, T., Wiseman, G., Belair, S., Berg, A., Bullock, P., Colliander, A., Cosh, M., Kim, S., Magagi, R., Moghaddam, M., Adams, J., Homayouni, S., Ojo, E., Rowlandson, T., Shang, J., Goita, K., Hosseini, M., "The Soil Moisture Active Passive Validation Experiment 2012 (SMAPVEX12): Pre-Launch Calibration and Validation of the SMAP Satellite", IEEE Transactions on Geoscience and Remote Sensing, Vol. 53, No. 5, May 2015.

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