Aeronautical Satellite Systems for Air Traffic Control and Communications in the European Environment

1969 ◽  
Vol 73 (700) ◽  
pp. 283-288
Author(s):  
H. G. Leysieffer
Keyword(s):  
North Atlantic ◽  
Traffic Control ◽  
Air Traffic ◽  
Traffic Surveillance ◽  
Satellite Systems ◽  
The Past ◽  
The North ◽  
The North Atlantic ◽  
Trade Route ◽  
North Atlantic Area

The North Atlantic is increasingly developing into the main trade route of the age. Shipping, the pioneer along this highway of commerce, in the past decade has been joined by air traffic displaying a striking growth rate. Not only is the number of aircraft simultaneously plying the Atlantic routes constantly on the increase, but also the volume of passengers and freight transported on each flight. The question, whether such flow of traffic in the air and on water could be dealt with in future with the safety to which it is entitled, has led to world-wide discussions over the past few years concerning the necessity for an air traffic surveillance system for the North Atlantic area. A further question, whether one should not include also sea traffic in such a system suggested itself. The initiative for holding such discussions naturally proceeded less from air and shipping undertakings, but rather from those committees who are entrusted in supervising the safety in the conduct of man and merchandise.

Operating in the North Atlantic MNPS Airspace

1999 ◽  
Vol 52 (1) ◽  
pp. 11-27
Author(s):  
Conor Whelan
Keyword(s):  
North Atlantic ◽  
Traffic Control ◽  
Traffic Management ◽  
Air Traffic Management ◽  
Air Traffic ◽  
Performance Specification ◽  
The North ◽  
Fuel Burn ◽  
The North Atlantic ◽  
Reporting Procedures

This paper considers the issue of operating aircraft through the North Atlantic's Minimum Navigation Performance Specification (MNPS) airspace. Noting that aircraft constantly strive for reduced fuel burn and uplift, it describes how flight operators and pilots conduct safe, efficient flights through the region. Reference is made to mechanisms of the North Atlantic MNPS airspace in terms of its Organized Track Structure and other routes that exist. These different structures emphasize the level of flexibility available. Flight planning procedures and requirements necessary to obtain oceanic Air Traffic Control (ATC) clearances are mentioned, as is an account of how communication and position reporting procedures operate to apply the Mach Number technique. Other aspects of MNPS operations such as ETOPS operational restrictions, meteorological effects, the employment of Reduced Vertical Separation Minima and planned regional changes aim to provide an overview of the MNPS system's current and future air traffic management.

III—Dectra

1956 ◽  
Vol 9 (4) ◽  
pp. 394-405
Author(s):  
G. Hawker
Keyword(s):  
North Atlantic ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Air Traffic ◽  
Civil Aviation ◽  
Main Route ◽  
The North ◽  
The North Atlantic

Dectra (Decca Track/Range) is one of two British systems recommended at the March 1954. meeting of Com. Division of I.C.A.O. in Montreal for evaluation by interested States. Arrangements are now being made to commence proving trials of Dectra at the end of this year or possibly the beginning of 1957. The trials will be made under the auspices of the Ministry of Supply and Ministry of Transport and Civil Aviation in this country and with the support of the Department of Transport in Newfoundland. The system is primarily designed for the navigation of fast jet aircraft across the North Atlantic, a problem intensified by air traffic control when more than 100 aircraft are in the air at the same time on those routes. It is, however, likely to prove valuable for other similar applications. The trials installation will cover the main route Prestwick–Gander.

London—New York Comet III ‘Paper’ Operation

1955 ◽  
Vol 8 (3) ◽  
pp. 256-257
Author(s):  
E. W. Pike
Keyword(s):  
New York ◽  
North Atlantic ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Meteorological Data ◽  
Air Traffic ◽  
The North ◽  
Payload Capacity ◽  
The North Atlantic ◽  
Daily Paper

In order to obtain some experience of problems that were likely to be encountered in the operation of the Comet III across the North Atlantic, B.O.A.C. decided early in 1954 to conduct a daily ‘paper’ operation between London and New York. The aircraft was planned to depart from London at 1000 G.M.T. each day. It was felt that the production of operational statistics on the basis of a daily operation in this way would enable the Corporation to compile useful information on such vital subjects as elapsed times, payload capacity, fuel uplift requirements, the frequency with which particular routeings were likely to be used and the adequacy of existing meteorological telecommunications and air traffic control services. In order to obtain the basic meteorological data for planning flights it was necessary to enlist the cooperation of the London Airport Meteorological Forecasting Unit and their most helpful cooperation played an important part in the results achieved.

Air Traffic Control Over The North Atlantic

1959 ◽  
Vol 63 (580) ◽  
pp. 206-220
Author(s):  
E. W. Pike
Keyword(s):  
Traffic Flow ◽  
North Atlantic ◽  
Traffic Control ◽  
Air Traffic Control ◽  
Air Traffic ◽  
Large Measure ◽  
The North ◽  
Ultimate Responsibility ◽  
The North Atlantic ◽  
Safety Considerations

Before considering the special case of the North Atlantic, I should like to attempt some clarification of the term “Air Traffic Control” (A.T.C.). It is in fact a service for which I.C.A.O. member states have accepted responsibility dedicated primarily to avoidance of air-to-air collision hazards and secondly, to providing an expeditious traffic flow. When traffic is dense these requirements are somewhat incompatible and, of course, safety considerations are paramount; therefore the traffic flow suffers impediment in some form or other. Traffic Controllers provide service by issuing clearances which are subject to pilot acceptance. Pilots can ask for alternative clearances if they deem those offered unacceptable. Although the A.T.C. service clearly shoulders a large measure of responsibility for avoidance of air-to-air collisions, the ultimate responsibility is vested in the pilot-in-command who is authorised to take any action he considers necessary to maintain safe flight.

scholarly journals The Meridional Shift of the Midlatitude Westerlies over Arid Central Asia during the Past 21 000 Years Based on the TraCE-21ka Simulations

2020 ◽  
Vol 33 (17) ◽  
pp. 7455-7478
Author(s):  
Nanxuan Jiang ◽  
Qing Yan ◽  
Zhiqing Xu ◽  
Jian Shi ◽  
Ran Zhang
Keyword(s):  
Indian Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Last Deglaciation ◽  
The Past ◽  
The North ◽  
External Forcings ◽  
The Indian Ocean ◽  
The Last Deglaciation ◽  
The North Atlantic

AbstractTo advance our knowledge of the response of midlatitude westerlies to various external forcings, we investigate the meridional shift of midlatitude westerlies over arid central Asia (ACA) during the past 21 000 years, which experienced more varied forcings than the present day based on a set of transient simulations. Our results suggest that the evolution of midlatitude westerlies over ACA and driving factors vary with time and across seasons. In spring, the location of midlatitude westerlies over ACA oscillates largely during the last deglaciation, driven by meltwater fluxes and continental ice sheets, and then shows a long-term equatorward shift during the Holocene controlled by orbital insolation. In summer, orbital insolation dominates the meridional shift of midlatitude westerlies, with poleward and equatorward migration during the last deglaciation and the Holocene, respectively. From a thermodynamic perspective, variations in zonal winds are linked with the meridional temperature gradient based on the thermal wind relationship. From a dynamic perspective, variations in midlatitude westerlies are mainly induced by anomalous sea surface temperatures over the Indian Ocean through the Matsuno–Gill response and over the North Atlantic Ocean by the propagation of Rossby waves, or both, but their relative importance varies across forcings. Additionally, the modeled meridional shift of midlatitude westerlies is broadly consistent with geological evidence, although model–data discrepancies still exist. Overall, our study provides a possible scenario for a meridional shift of midlatitude westerlies over ACA in response to various external forcings during the past 21 000 years and highlights important roles of both the Indian Ocean and the North Atlantic Ocean in regulating Asian westerlies, which may shed light on the behavior of westerlies in the future.

scholarly journals Modeling the climatic implications of the Guliya δ<sup>18</sup>O record during the past 130 ka

2012 ◽  
Vol 8 (3) ◽  
pp. 1885-1914
Author(s):  
D. Xiao ◽  
P. Zhao ◽  
Y. Wang ◽  
X. Zhou
Keyword(s):  
North Atlantic ◽  
Climate Model ◽  
Surface Air Temperature ◽  
Late Summer ◽  
The Arctic ◽  
The Past ◽  
The North ◽  
Precession Cycle ◽  
The North Atlantic ◽  
Anomalous Pattern

Abstract. Using an intermediate-complexity UVic Earth System Climate Model (UVic Model), the geographical and seasonal implications and an indicative sense of the historical climate found in the δ18O record of the Guliya ice core (hereinafter, the Guliya δ18O) are investigated under time-dependent orbital forcing with an acceleration factor of 100 over the past 130 ka. The results reveal that the simulated late-summer (August–September) Guliya surface air temperature (SAT) reproduces the 23-ka precession and 43-ka obliquity cycles in the Guliya δ18O. Furthermore, the Guliya δ18O is significantly correlated with the SAT over the Northern Hemisphere (NH), which suggests the Guliya δ18O is an indicator of the late-summer SAT in the NH. Corresponding to the warm and cold phases of the precession cycle in the Guliya temperature, there are two anomalous patterns in the SAT and sea surface temperature (SST) fields. The first anomalous pattern shows an increase in the SAT (SST) toward the Arctic, possibly associated with the joint effect of the precession and obliquity cycles, and the second anomalous pattern shows an increase in the SAT (SST) toward the equator, possibly due to the influence of the precession cycle. Additionally, the summer (winter) Guliya and NH temperatures are higher (lower) in the warm phases of Guliya late-summer SAT than in the cold phases. Furthermore, the Guliya SAT is closely related to the North Atlantic SST, in which the Guliya precipitation may act as a "bridge" linking the Guliya SAT and the North Atlantic SST.

Zonal index and circulation change in the north Atlantic area, 1873-1972

1982 ◽  
Vol 2 (2) ◽  
pp. 159-169 ◽  
Author(s):  
T. J. Makrogiannis ◽  
A. A. Bloutsos ◽  
B. D. Giles
Keyword(s):  
North Atlantic ◽  
Zonal Index ◽  
The North ◽  
Circulation Change ◽  
The North Atlantic ◽  
North Atlantic Area ◽  
Atlantic Area
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