Same beam VLBI (very long baseline interferometry) observations of the two sub-satellites of SELENE (KAGUYA) are demonstrated for purpose of the precise gravimetry of the Moon. The same beam VLBI contributes a great deal to cancel out the tropospheric and ionospheric delays and to determine the absolute value of the cycle ambiguity by using the multi frequency VLBI method. As a result, the diff...

The satellite-based earth observations have become an appropriate instrumental approach in monitoring the natural hazards among modern-day researchers. This study presents a multi-parameter using precursors of different physical nature defining states atmosphere and ionosphere terms temporal spatial variations about 5 days before impending M 7.7 Jamaican earthquake (EQ). We performed comprehens...

IONORING (IONOspheric RING) is a tool capable to provide the real-time monitoring and modeling of ionospheric Total Electron Content (TEC) over Italy, in latitudinal longitudinal ranges 35°N–48°N 5°E–20°E, respectively. exploits Global Navigation Satellite System (GNSS) data acquired by RING (Rete Integrata Nazionale GNSS) network, managed Istituto di Geofisica e Vulcanologia (INGV). The system...

Abstract. We report the investigation of ionospheric response to passage an annular solar eclipse over Southeast Asia on 26 December 2019 using multiple sets observations. Two ionosondes (one at Kototabang and another Pontianak) were used measure dynamical changes in layer during event. A network ground-based GPS receiver stations Indonesia was derive distribution total electron content (TEC) r...

The Federal Aviation Administration’s Wide Area Augmentation System (WAAS) provides high integrity GPS-based precision navigation service to users in the conterminous United States. In October 2003, only four months after WAAS was commissioned, a series of coronal mass ejections from the sun triggered one of the strongest geomagnetic and ionospheric storms of the solar cycle. WAAS user integrit...

O ngoing assessment of nursing competency is necessary to ensure that safe care is being delivered to patients. Competency assessments are familiar phenomena among nurses, independent of practice settings. Nurses graduate with basic skills; as skill sets expand, it becomes important to verify that skill and technique accuracy are maintained. As healthcare becomes more specialized, nurses who co...

In this contribution, an adaptive autoregressive model is proposed and developed to predict global ionospheric vertical total electron content maps (VTEC). Specifically, the spherical harmonic (SH) coefficients are predicted based on the autoregressive model, and the order of the autoregressive model is determined adaptively using the F-test method. To test our method, final CODE and IGS global...