09. Determine the temperature and altitude of the troposphere by using GNSS radio occultation data in Vu Gia - Thu Bon

Abstract

GNSS-RO is an active limb sounding technique, in which GNSS satellites transmit signals passing through the Earth's atmosphere and received by a GNSS receiver on low earth orbiter (LEO) satellite. GNSS- RO provides accurate atmospheric refractivity profiles. The RO technique is a highly appreciated and widely used new technique for studying the Earth's atmosphere. In this study, we focus on applying GNSS-RO data to estimate troposphere temperature and altitude, which are important atmospheric parameters for the Vu Gia - Thu Bon area. GNSS-RO data used from GRACE, MetOP and COSMIC programs from January 2008 to December 2012. Calculation results determine the temperature into the troposphere altitude in the area with a value of 16.426 ± 0.440 km and 195.5 ± 1.8 K.