ionospheric scintillation

ionospheric scintillation

(ÿ-on-ŏ-sfe -rik) See scattering.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
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Tsujii, "GBAS availability assessment and modelling of ionospheric scintillation effects," in Proceedings of the ION's Pacific PNT Meeting, Honolulu, Hawaii, USA, April 2015.
Ionospheric scintillation at GNSS frequencies is a phenomenon that typically occurs after sunset and mainly during premidnight hours.
A new GNSS Ionospheric Scintillation and TEC Monitor (GISTM) receiver system from Novatel has been released that integrates the company's powerful OEM628 measurement engine with a high-quality, low-phase-noise, oven-controlled crystal oscillator.
For example, monitoring is helpful in distinguishing ionospheric scintillations from a flock of birds roosting on or near a receiving antenna.
In addition to that, the large number of satellites available for navigation will also provide significant benefits in terms of geometric diversity of the satellites and enable good and reliable positioning even in the presence of ionospheric scintillations. For that reason significant work is underway in order to develop and standardize a future GBAS service which supports the use of two frequencies and several constellations in order to mitigate the negative effects on current systems.