A comparison of quasi-continuous wave and broadband travel time techniques in the prediction of long-range reverberation

1997 ◽  
Vol 102 (4) ◽  
pp. 2063-2071 ◽  
Author(s):  
Kevin B. Smith ◽  
Erick B. Cushman
Keyword(s):  
Travel Time ◽  
Long Range ◽  
Continuous Wave

1—by Captain A. Wepster

1963 ◽  
Vol 16 (4) ◽  
pp. 389-398
Keyword(s):  
United States ◽  
Travel Time ◽  
Long Range ◽  
The United States ◽  
Point Of View ◽  
Ship Routing ◽  
Waves And Currents ◽  
Meteorological Institute

In 1960 Hanssen and James described to the Institute a system developed and used by the United States Hydrographic Office for selecting the optimum track for transoceanic crossings by applying long-range predictions of winds, waves and currents to a knowledge of how the routed vessel reacts to these variables. The paper (Journal, 13, 253) described how, over a period of two years, an average reduction in travel time of 14 hours was achieved over 1000 optimum routes.In the present papers, presented at an Institute meeting held in London on 19 April, Captain Wepster of the Holland-America Line first of all goes into the benefits which effective ship routing offers the ship operator and then describes the results of the experimental routing programme undertaken by his Company in association with the Royal Netherlands Meteorological Institute. Mr. Verploegh of that Institute then discusses the programme from the forecaster's point of view.

Optimum Ship Routing

1960 ◽  
Vol 13 (3) ◽  
pp. 253-272 ◽  
Author(s):  
George L. Hanssen ◽  
Richard W. James
Keyword(s):  
United States ◽  
Travel Time ◽  
Long Range ◽  
Wind Waves ◽  
The United States ◽  
Ship Routing ◽  
Waves And Currents

The paper describes the system developed and used by the United States Hydrographic Office for selecting the optimum track for transoceanic crossings by applying long-range predictions of wind, waves and currents to a knowledge of how the routed vessel reacts to these variables. Over a period of two years, over 1000 optimum ship routes were provided to one authority, with an average reduction in travel time of 14 hours.

Estimation of the Travel Time Using the New Measurement Technique for Long-range Transmission

2004 ◽  
Vol 43 (5B) ◽  
pp. 3169-3175 ◽  
Author(s):  
Yong Wang ◽  
Hiroyuki Hachiya ◽  
Toshiaki Nakamura ◽  
Hidetoshi Fujimori
Keyword(s):  
Travel Time ◽  
Long Range ◽  
Measurement Technique

Travel‐time sensitivity kernels in long‐range propagation

2008 ◽  
Vol 123 (5) ◽  
pp. 3913-3913
Author(s):  
Emmanuel Skarsoulis ◽  
Bruce Cornuelle ◽  
Matthew Dzieciuch
Keyword(s):  
Travel Time ◽  
Long Range ◽  
Time Sensitivity

Travel-Time Sensitivity Kernels In Long-Range Propagation

2007 ◽  
Author(s):  
Emmanuel Skarsoulis ◽  
Bruce Cornuelle
Keyword(s):  
Travel Time ◽  
Long Range ◽  
Time Sensitivity

scholarly journals Long-Range Drone Detection of 24 G FMCW Radar with E-plane Sectoral Horn Array

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4171 ◽  
Author(s):  
Byunggil Choi ◽  
Daegun Oh ◽  
Sunwoo Kim ◽  
Jong-Wha Chong ◽  
Ying-Chun Li
Keyword(s):  
Long Range ◽  
Continuous Wave ◽  
Radar System ◽  
Lens Antenna ◽  
Horn Antennas ◽  
Fmcw Radar ◽  
Outdoor Environments ◽  
Joint Range ◽  
Sectoral Horn ◽  
24 Ghz

In this work, a 24-GHz frequency-modulated continuous-wave (FMCW) radar system with two sectoral horn antennas and one transmitting lens antenna for long-range drone detection is presented. The present work demonstrates the detection of a quadcopter-type drone using the implemented radar system up to a distance of 1 km. Moreover, a 3D subspace-based algorithm is proposed for the joint range-azimuth-Doppler estimation of long-range drone detection. The effectiveness of the long-range drone detection is verified with the implemented radar system through a variety of experiments in outdoor environments. This is the first such demonstration for long-range drone detection with a 24-GHz FMCW radar.

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