Helicopter Pilots Encountering Fog: An Analysis of 109 Accidents from 1992 to 2016 by Alex de Voogt, Hilary Kalagher, Andrew Diamond

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Variational assimilation of web camera-derived estimates of visibility for Alaska aviation by Jacob R. Carley, Michael Matthews, Matthew T. Morris, Manuel S. F. V. De Pondeca, Jenny Colavito, Runhua Yang, Takashi Toyofuku

“…Results suggest that the web camera-derived estimates of visibility can capture low visibility conditions and have the potential to improve the RTMA visibility analysis under conditions of low instrument flight rules and instrument flight rules.…”
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Analysis of Saturated Capacity on the Runway Based on Advisory Circular 150/5060-5 As a Study Material for Airport Management Learning by I Gusti Agung Ayu Mas Oka, Dwi Chandra Yuniar, Dian Anggraini Purwaningtyas, Nabilla Azzahra

“…Based on the data obtained and processed, the results show that the saturation capacity of the runway per hour for runway 11 directions is 53 for Visual Flight Rules (VFR) and 49 Instrument Flight Rules (IFR). Meanwhile, the direction of runway 29 is 50 in VFR conditions and 46 in IFR conditions. …”
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Design of a high accurate aircraft ground - based landing systems by Salih, Ahmad Abbas Al-Ameen, Md Zhahir, Md Amzari

“…However, low visibility can also affect all airports in the vicinity, forcing aircrafts to land in low visibility conditions depending on Instrument Flight Rules (IFR). Aircraft approach and landing are the most hazardous portions of flight; accidents records indicate that approximately 50 percent of the accidents occur during aircraft landing. …”
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Modeling and simulation of a high accurate aircraft ground-based positioning and landing system by Salih, Ahmad Abbas Al-Ameen, Ariff, Omar Kassim, Md Zhahir, Md Amzari, Ahmad, Mohamed Tarmizi

“…However, low visibility can also affect all airports in the vicinity, forcing aircrafts to land in low visibility conditions depending on Instrument Flight Rules (IFR). Aircraft approach and landing are the most hazardous portions of flight; accidents records indicated that approximately 50 percent of the accidents occur during these portions. …”
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A novel high-precision ground-based aircraft landing system capitalizing on towers trilateration by Salih, Ahmad Abbas Al-Ameen

“…However, low visibility can also affect all airports in the vicinity, forcing aircrafts to land in low visibility conditions depending on Instrument Flight Rules (IFR). Aircraft approach and landing are the most hazardous portions of flight; accidents records indicate that, approximately 50 percent of the accidents occur during aircraft landing. …”
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Airborne turbulence measurements in the lower troposphere onboard the research aircraft Dornier 128-6, D-IBUF by Ulrich Corsmeier, Rudolf Hankers, Andreas Wieser

“…Besides avionic instrumentation for VFR-flights (Visual Flight Rules) and IFR-flights (Instrument Flight Rules) at low altitudes over complex terrain, there are redundant sensors for the measurement of wind, temperature and humidity. …”
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