GNSS radio occultation L1B excess phase and amplitude for GRACE as contributed by EUMETSAT, version 2.0 (gnssro_grace_eumetsat_l1b)

This dataset provides Global Navigation Satellite System (GNSS) Radio Occultation (RO) Excess Phase and Amplitude data from the GRACE (Gravity Recovery and Climate Experiment) mission as contributed by the European Organisation for the Exploitation of Meteorological Satellites. Each granule represents a single occultation.

GNSS RO is a remote sensing technique that measures the refracted radio signals generated by GNSS satellites and viewed through Earth’s limb. Parameters describing the refraction can be used to infer familiar atmospheric variables such as temperature, pressure and water vapor. The RO technique allows for increased global coverage of temperature and water vapor through the large number of daily observations and as a result plays an important role in the enhancement of Numerical Weather Prediction and other atmospheric-related studies.

本数据集提供由欧洲气象卫星应用组织（European Organisation for the Exploitation of Meteorological Satellites）贡献的重力恢复与气候实验（Gravity Recovery and Climate Experiment, GRACE）任务的全球导航卫星系统（Global Navigation Satellite System, GNSS）无线电掩星（Radio Occultation, RO）附加相位与振幅数据。每个数据粒对应一次掩星事件。

GNSS无线电掩星是一种遥感技术，通过地球临边观测GNSS卫星产生的折射无线电信号。用于表征折射效应的参数可反演得到气温、气压、水汽等常见大气变量。得益于每日海量观测数据，该掩星技术可实现全球范围内气温与水汽的更全面探测，因此在提升数值天气预报（Numerical Weather Prediction）水平及开展其他大气相关研究方面发挥着重要作用。