Phys.org May 30, 2023 The Hunga Tonga Volcano eruption launched waves which generated traveling ionospheric disturbances (TIDs) in the ionosphere, which are known to adversely impact radio applications such as Global Navigation Satellite Systems (GNSS). One such GNSS application is Precise Point Positioning (PPP), which can achieve cm-level accuracy using a single receiver, following a typical convergence time of 30 min to 1 hr. An international team of researchers (Australia, USA – Boston College, Vietnam) used a network of ionosondes located throughout the Australian region in combination with GNSS receivers to explore the impacts of the volcano eruption on the […]
Tag Archives: Satellite navigation
NASA uses moonlight to improve satellite accuracy
Phys.org April 4, 2022 The Moon is extremely stable and not influenced by factors on Earth like climate to any large degree. It is a very good calibration reference. An international team of researchers in (US – NIST, USGS, Canada) developed NASA’s airborne Lunar Spectral Irradiance (air-LUSI) which is a telescope that accurately measures how much light is reflected off the lunar surface to assess the amount of energy Earth-observing satellites receive from moonlight. It will help to improve the accuracy and consistency of measurements among Earth-observing satellites. The results will compliment ground-based sites. Scientists can more easily compare data […]