Abstract
The validation of the DPR onboard the GPM Mission’s core observatory was carried out in three ways; calibration of the DPR, verification of the appropriateness of the attenuation and scattering parameters in the Ka band, and through comparisons of the precipitation estimates from the DPR with corresponding ground-based measurements. The DPR was proved to have been stably operated since the launch of the GPM core observatory, and both the Ku and Ka radars were calibrated within ±1 dB which is the specification of the DPR. A ground-based dual Ka-band radar system was developed for obtaining the attenuation and scattering characteristics of snow particles in the Ka band. Observations with this system show that the range of parameters in the k-Ze relationship adopted by the DPR standard algorithm is reasonable. Comparisons of the DPR rain estimates with the AMeDAS rain gauge in Japan and MRMS/NMQ data over the continental US show that the differences between the DPR and ground measurements were mostly within 10%. Also, the results of classification on rain/snow included in the DPR Level 2 data were verified by comparison with visual observation at ground sites. Overall, the rain rates and parameters estimated by the DPR were found to be reasonable.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Brandes, E. A., Ikeda, K., Thompson, G., & Schönhuber, M. (2008). Aggregate terminal velocity/temperature relations. Journal of Applied Meteorology and Climatology, 47, 2729–2736. https://doi.org/10.1175/2008JAMC1869.1.
Li, I., Sekelsky, S. M., Reising, S. C., Swift, C. T., Durden, S. L., Sadowy, G. A., Dinardo, S. J., Li, F. K., Huffman, A., Stephens, G. L., Babb, D. M., & Rosenberger, H. W. (2001). Retrieval of atmospheric attenuation using combined ground-based and airborne 95-GHz cloud radar measurements. Journal of Atmospheric and Oceanic Technology, 18, 1345–1353. https://doi.org/10.1175/1520-0426(2001)018<1345:ROAAUC>2.0.CO;2.
Nakamura, K., Shimizu, S., Nakagawa, K., & Hanado H. (2011). Dual Ka-band radar experiment for the DPR algorithm development. In Proceedings of IEEE international geoscience and remote sensing symposium, Vancouver, Canada, pp 1554–1557, https://doi.org/10.1109/IGARSS.2011.6049366.
Nakamura, K., Kaneko, Y., Nakagawa, K., Hanado, H., & Nishikawa, M. (2018). Measurement method for specific attenuation in the melting layer using a Dual Ka-band radar system. IEEE Transactions on Geoscience and Remote Sensing, 56(6), 3511–3519. https://doi.org/10.1109/TGRS.201801291.
Nishikawa, M., Nakamura, K., Fujiyoshi, Y., Nakagawa, K., Hanado, H., Minda, H., Nakai, S., Kumakura, T., & Oki, R. (2015). Radar attenuation and reflectivity measurements of snow with Dual Ka-band radar. IEEE Transactions on Geoscience and Remote Sensing, 54(2), 714–722. https://doi.org/10.1109/TGRS.2015.2464099.
Zhang, J., Howard, K., Langston, C., Kaney, B., Qi, Y., Tang, L., Grams, H., Wang, Y., Cocks, S., Martinaitis, S., Arthur, A., Cooper, K., Brogden, J., & Kitzmiller, D. (2016). Multi-Radar Multi-Sensor (MRMS) quantitative precipitation estimation: Initial operating capabilities. Bulletin of the American Meteorological Society, 97, 621–638. https://doi.org/10.1175/BAMS-D-14-00174.1.
Acknowledgments
The authors are grateful to Mr. Takeshi Masaki, Ms. Yuki Kaneko and Dr. Nozomi Kawamoto for helping with DPR data analyses.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this chapter
Cite this chapter
Oki, R., Iguchi, T., Nakamura, K. (2020). The GPM DPR Validation Program. In: Levizzani, V., Kidd, C., Kirschbaum, D., Kummerow, C., Nakamura, K., Turk, F. (eds) Satellite Precipitation Measurement. Advances in Global Change Research, vol 69. Springer, Cham. https://doi.org/10.1007/978-3-030-35798-6_3
Download citation
DOI: https://doi.org/10.1007/978-3-030-35798-6_3
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-35797-9
Online ISBN: 978-3-030-35798-6
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)