20/06/2022
Geographical Timeline Survey Technology -
The Global Navigation Satellite System (GNSS) is a global GNSS owned and operated by the Russian federation. The fully operational system consists of 24+ satellites. The Global Navigation Satellite System (GNSS) provides a continuous, high precision, global, real-time, and all weather navigation and positioning on Earth's surface. Recently, the reflected and refracted signals from GNSS satellites resulted in many new applications in environmental remote sensing. The GNSS refracted signals from Radio Ocultation satellites together with ground GNSS observations have produced wide application in atmospheric remote sensing, including global monitoring of tropospheric water vapour, temperature and pressure, tropopause parameters and ionospheric parameters as well as ionospheric irregularities. The GNSS reflected signals from the ocean and land surface could determine the wave height, wind speed and wind direction of ocean surface and land surface conditions.