Global Precipitation Measurement (GPM) Mission: Inter-calibration of Microwave Radiometers

The Global Precipitation Measurement (GPM) mission is an international multi-satellite mission that will measure precipitation from space. The mission is a follow-on of the highly successful Tropical Rainfall Measuring Mission (TRMM). The GPM mission is unique in that it will utilize several different microwave radiometers on individual satellites to provide global coverage of precipitation measurements. Inter-calibration of the radiometers is a key aspect of the mission, intended to ensure that consistent measurements are made among the radiometers in the constellation. RSG is a part of the Inter-Calibration Working Group (X-Cal) for GPM, which is responsible for developing algorithms for inter-calibrating the radiometers. We are approaching the problem using a vicarious calibration technique which uses both a cold [Ruf 2000] and warm [Brown and Ruf 2005] reference.

 

Relevant Publications:

McKague, D.S., C.S. Ruf and J.J. Puckett, “Beam Spoiling Correction for Spaceborne Microwave Radiometers using the Two-Point Vicarious Calibration Method,” IEEE Trans. Geosci. Remote Sens., 49(1), 21-27, 10.1109/TGRS.2010.2068052, 2011.

Wilheit, T., W. Berg, L. Jones, R. Kroodsma, D. McKague, C. Ruf and M. Sapiano, “A Consensus Calibration Based on TMI and WindSat,” Proc. 2011 International Geoscience and Remote Sensing Symposium, Vancouver, BC, CANADA, pp. 2641-2644, 25-29 July 2011.

Kroodsma, R., D. McKague and C. Ruf, “Robustness of the Vicarious Cold Calibration Algorithm in the Double Difference Method for GPM Inter-Calibration,” Proc. 2011 International Geoscience and Remote Sensing Symposium, Vancouver, BC, CANADA, pp. 2233-2236, 25-29 July 2011.

Kroodsma, R., D. McKague, J. Puckett and C. Ruf, “Stability of the Vicarious Cold Calibration Statistic for the GPM Constellation,” Proc. 2010 International Geoscience and Remote Sensing Symposium, Honolulu, HI, USA, pp. 566-569, 25 July 2010.

McKague, D., C. Ruf and J.J. Puckett, “Microwave Radiometer Inter-Calibration Using the Vicarious Calibration Method,” Proc. 2009 IEEE International Geoscience and Remote Sensing Symposium, Cape Town, S.A., Vol. IV, 117-120, 13-17 July 2009.

McKague, D., C. Ruf and J. Puckett, “Vicarious Calibration of Global Precipitation Measurement Microwave Radiometers,” Proc. 2008 IEEE International Geoscience and Remote Sensing Symposium, Boston, MA, Vol. IV, 459-462, 7-11 July 2008.