DOP coefficients in GNSS observations

GNSS observations of deep convective time scales in the Amazon

[1] In the tropics, understanding the shallow-to-deep transition and organization of convection on the mesoscale is made difficult due the paucity of long-term high spatial/temporal resolution data. In this paper, data from the world’s first long-term equatorial Global Navigational Satellite System meteorological station in Manaus (Central Amazon) is used to create a new metric, a water vapor c...

Assimilation of GNSS radio occultation observations in GRAPES

This paper reviews the development of the global navigation satellite system (GNSS) radio occultation (RO) observations assimilation in the Global/Regional Assimilation and PrEdiction System (GRAPES) of China Meteorological Administration, including the choice of data to assimilate, the data quality control, the observation operator, the tuning of observation error, and the results of the obser...

Error Correction using DOP

VLBI observations of GNSS-satellites: from scheduling to analysis

The possibility of observing satellites with the very long baseline interferometry (VLBI) technique has been discussed for several years in the geodetic community, with observations of either existing satellites of the global navigation satellite systems or of satellites dedicated to realise a space tie. Such observations were carried out using the Australian telescopes in Hobart and Ceduna whi...

Sea level observations using multi-system GNSS reflectometry

Information on sea level and its changes are important in connection to global climate change processes. For centuries, sea level has been observed with coastal tide gauges and since some decades with satellite altimetry. Furthermore, during recent years the application of Global Navigation Satellite System (GNSS) reflectometry, also known as GNSS-R, for sea level observations has been develope...