R/V Mirai (MR21-03) GNSS precipitable water vapor This data is precipitable water vapor estimated from GNSS satellite data observed by a GNSS receiver onboard the R/V Mirai. The method of estimation from GNSS carrier phase to precipitable water vapor value is based on Fujita et al. (2008). If the details and raw RINEX data are required, please get in touch with M. Fujita (fmiki [at] jamstec.go.jp). Reference. Fujita, M., F. Kimura, K. Yoneyama, and M. Yoshizaki, 2008: Verification of precipitable water vapor estimated from shipborne GPS measurements, Geophys. Res. Lett., 35, L13803, doi:10.1029/2008GL033764, 2008. ///