NASA Logo Jet Propulsion Laboratory California Institute of Technology View the NASA Portal
NASA Banner
NASA Banner
NASA Banner
NASA Banner
JPL Science
JPL Science Division Home
Planetary Science Planetary Science
Astrophysics & Space Sciences Astrophysics & Space Sciences
Earth Science Earth Science
Center for Climate Sciences (3292)
Earth Surface And Interior (329A)
Ocean Circulation And Air Sea Interaction (329B)
Sea Level And Ice (329C)
Stratosphere And Upper Troposphere (329D)
Atmospheric Physics And Weather (329E)
Terrestrial Hydrology (329F)
Carbon Cycle And Ecosystems (329G)
Laboratory Studies And Atmospheric Observations (329H)
Tropospheric Composition (329I)
Aerosols And Clouds (329J)
Directorate Science Affiliates Directorate Science Affiliates
Open Postdoc Positions Open Postdoc Positions
Brochures Brochures
 Terrestrial Hydrology (329F): People
Andreas  Colliander's Picture
Jet Propulsion Laboratory
M/S 300-323
4800 Oak Grove Drive
Pasadena, CA 91109
818 354-0270
818 393-6720
Email Contact:
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
  1. Chen, F., W.T. Crow, R. Bindlish, A. Colliander, M.S. Burgin, J. Asanuma, K. Aida, "Global-Scale Evaluation of SMAP, SMOS and ASCAT Soil Moisture Products using Triple Collocation," Remote Sensing of Environment, Vol. 214, pp. 1-13, 2018.
  2. Das, N.N., D. Entekhabi, R.S. Dunbar, A. Colliander, F. Chen, W. Crow, T.J. Jackson, A. Berg, D.D. Bosch, T. Caldwell, M.H. Cosh, C. Holifield Collins, E. Lopez-Baeza, M. Moghaddam, T. Rowlandson, P.J. Starks, M. Thibeault, J.P. Walker, X. Wu, P.E. O'Neill, S. Yueh, E.G. Njoku, "The SMAP Mission Combined Active-Passive Soil Moisture Product at 9 km and 3 km Spatial Resolutions," Remote Sensing of Environment, Vol. 211, pp. 204-217, 2018.
  3. 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.
  4. Zwieback, S., A. Colliander, M. H. Cosh, J. Martinez-Fernandez, H. McNairn, P.J. Starks, M. Thibeault, A. Berg, "Estimating time-dependent vegetation biases in the SMAP soil moisture product," Hydrology and Earth System Sciences, February 7, 2018.
  5. 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.
  6. Huang, H., L. Tsang, E. G. Njoku, A. Colliander, T-H. Liao, K-H. Ding, "Propagation and Scattering by a Layer of Randomly Distributed Dielectric Cylinders using Monte Carlo Simulations of 3D Maxwell Equations with Applications in Microwave Interactions with Vegetation", IEEE Access, Vol. 5, No. 1, December 2017.
  7. Colliander, A., M.H. Cosh, S. Misra, T.J. Jackson, W.T. Crow, S. Chan, R. Bindlish, C. Chae, C. Holifield Collins, S.H. Yueh, "Validation and Scaling of Soil Moisture in a Semi-Arid Environment: SMAP Validation Experiment 2015 (SMAPVEX15)," Remote Sensing of Environment, 196, 101-112, 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," Remote Sensing of Environment, 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 Transactions on Geoscience and Remote Sensing, 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, "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.

Group Home Page
People in this Group
Group Projects

JPL Privacy Statement Sitemap Contact Site Manager