Cal/Val Program Objectives:

  • Pre-launch: Acquire and process data to calibrate, test, and improve models and algorithms for SMAP science data products. Develop and test techniques and protocols that will be used to validate SMAP data products after launch.
  • Post-launch: Verify and improve performance of the science algorithms. Validate accuracies of the science data products.


  • Calibration: The set of operations that establish, under specified conditions, the relationship between sets of values of quantities indicated by a measuring instrument or measuring system and the corresponding values realized by standards.
  • Validation: The process of assessing by independent means the quality of the data products derived from the system outputs.

Validation Methods and Resources:

  • Homogenous and heterogeneous targets
  • In situ observations
  • Truck- and tower-based radiometers and radars
  • Aircraft-based radiometers and radars
  • Scaling methodologies
  • Modeling and data assimilation

Cal/Val Links


Links to Other Data Sources

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