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... Science Frontiers ONLINE No. 52: Jul-Aug 1987 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Ship Enveloped By False Radar Echo August 1, 1985. Red Sea. Aboard the m.v . Botany Bay . "At 1800 a crescent-shaped trace of spurious echoes appeared about 15 n. miles ahead of the vessel. This gradually developed, in an encirculating manner, until, by 1845 the echoes had totally surrounded the vessel. (See sketch.) The effect looked like, or could be likened to a plan view of a black island with sandy beaches around its perimeter. The echoes were significant with strong contrast and could even have been mistaken for land on the radar. The effect could not be removed or ... by changing range scales, motion modes, gain, tuning or perhaps most significantly, altering the pulse lengths. An identical effect was observed on the vessel's independent ARPA radar. The Master commented that although false echoes were invariably encountered in this region, he had not seen one such as this, which actually 'encapsulated' the vessel within the PPI of the radar. By 1935 the false echoes had dissipated into isolated batches splayed randomly across the screen." (Leslie, A.J .; "Radar Echoes," Marine Observer, 56:117, 1986.) Comment. In the Red Sea and Persian Gulf, similar false echoes are often associated with bioluminescent phenomenon. For details, see category GLW in our catalog: Lightning, Auroras. Ordering information here . ...
Terms matched: 2 - Score: 490 - 15 May 2017 - URL: /sf052/sf052g19.htm
... Carbon in a new comet Meteorites also transport organic payloads Supernova confusion and mysteries "COMPACT STRUCTURES": WHAT NEXT? Biology Nose news Checklist of apparently unknown animals New vertebrate depth record Aggressive mimicry Parasites control snail behavior Geology Do large meteors/comets come in cycles? Complexities of the inner earth Geophysics Concentrated source of lightning in cloud More carolina waterguns More moodus sounds Inside a texas tornado Ship enveloped by false radar echo Psychology Dowsing skeptics converted Do dreams reflect a biological state? ...
Terms matched: 2 - Score: 200 - 15 May 2017 - URL: /sf052/index.htm
... controls the military and civilian traffic of the entire Belgian territory. The range of the two radars is 300 kilometers, which is more than enough to cover the area where the reports took place...Headquarters determined to do some very precise studies during the next 55 minutes to eliminate the possibility of prosaic explanations for the radar images. Excellent atmospheric conditions prevailed, and there was no possibility of false echoes due to temperature inversions. ". .. at 0005 hours the order was given to the F-16s to take off and find the intruder. The lead pilot concentrated on his radar screen, which at night is his best organ of vision. The F-16 is equipped with very sophisticated equipment, including chase radar, which is not fixed directly ahead of the airplane, ... makes a wide search in an arc' of 90 degrees left and right of the nose... "Suddenly the two fighters spotted the intruder on their radar screens, appearing like a little bee dancing on the scope. Using their joy sticks like a video game, the pilots ordered the onboard computers to pursue the target. As soon as lock-on was achieved, the target appeared on the screen as a diamond shape, telling the pilots that from that moment on, the F-l6s would remain tracking the object automatically. "[ Before the radar had locked on for six seconds] the object had speed up from an initial velocity of 280 kph to 1,800 kph, while descending from 3,000 meters to 1,700 meters...in one ...
Terms matched: 2 - Score: 179 - 15 May 2017 - URL: /sf072/sf072g15.htm
... Clouds GLA13 Glowing Night Skies GLA14 Transient Sky Brightenings GLA15 Bright, Luminous Patches on the Horizon GLA16 Weather or Storm Lights GLA17 Curious Folklore: Auroras and Silken Threads GLA18 Correlation of Aurora Frequency with Lunar Phase GLA19 Auroras Interacting with Lunar Halos GLA20 Electrical Effects of Auroras at the Earth's Surface GLA21 Auroras and Surface Fogs GLA22 Black Auroras GLA23 Banded Skies GLA24 Millisecond Brightness Pulsations of the Night Sky GLA25 False Dawn GLA26 Auroras Following Coastlines GLA27 Challenges to the Theory of Aurora Origin GLA28 Flash Auroras GLA29 Possible Atmospheric-Laser Emission Accompanying Auroras GLA30 Mysterious Bright Streaks in the Sky GLA31 Short-Lived, Bright, Cloud-Like Patches High in the Sky Aurora-Frequency Correlated with Climate Coastlines Auroral Streamers Aligned with Wind Direction Expanding Ball-of-Light Phenomenon Infrared Banded Sky Auroral Streamers Aligned with Wind ... Light on the Horizon Jumping Stars Post-Twilight Infrared Brightening of the Sky Extraordinary Sunsets GEM THE MAGIC OF MIRAGES GEM1 Fata Morganas GEM2 Telescopic Mirages GEM3 Lateral Mirages GEM4 Multiple Mirages GEM5 Mirages Sensitive to the Observer's Position GEM6 The Novaya Zemlya Effect GEM7 Illusions of a Flat Earth GEM8 Dynamic Mirages GEM9 Mirror or Reflection Mirages Double Moons Mock Mirages GER RADIO AND RADAR ANOMALIES GER1 Long-Delayed Radio Echos GER2 The Moon's Effect on Radio Propagation GER3 Thunderstorm Modification of Radio Propagation GER4 Stable Patterns of Electromagnetic Radiation GER5 Unidentified Radio Signals... GER6 The Humming Earth GER7 Polar Radio Blackouts GER8 Around-th e-World Transmission of High-Frequency Signals GER9 Periodic Fading of Satellite Radio Transmissions GER10 Sudden Disappearance of High Frequency Radio Transmissions GER11 Correlation of Radio Propagation Quality with Planetary Positions GER12 ...
Terms matched: 2 - Score: 170 - 15 May 2017 - URL: /cat-geop.htm
... Battery Greek Computer Balances Olmec Lodestone Ccompass Plumbing Radioactivity in Bible Microscopic Engraving Surgical Instruments Optical Devices (Lenses) Egyptian Electricity Clocks Musical Instruments Mastic and Adhesives Glass Slabs and Floors Diamond Drilling Manna Maker Shell Etching Egyptian Glider Stone Telescopes [MMS] Metal Plating [MMM] Cement Jade Astronomical Instruments [MMS] Earthquake Detector Mallia Table Olmec Mirrors Inca abacus Aluminum Buckle, China [MMM] Mayan Dentistry Ancient False Teeth Paints, Cosmetics Wine and Beer Chewing Gum Atlatl Treppaning [MAF] Cement Pyramids Aluminum and Platinum [MMM] Plating, Welding, Gilding Soldering [MMM] Metallurgy [MMM] Vimanas (Flying Machines [MMM] MMW WOODEN ARTIFACTS Ancient Charcoal Wooden Implements Cedar Collars Ancient Plank Eskimo Goggles Precocious Wooden Spears Santa Rosa Hearths Homo erectus and Fire MS ENGINEERING STRUCTURES ANCIENT ASTRONOMICAL OBSERVATORIES Notable Observatory Buildings ... , Disappearing Islands Zeno maps Chinese Maps of America, Fusang Claim MGP ROCK ART, PETROGLYPHS, PICTOGRAPHS Tattoos Australian Bradshaw Paintings Paisa Petroglyphs Maze Stone Viking-Boat Tablet in America Chinese Motifs in America [MGS] Lascaux Cave Paintings Australian Rock Art, Strange Figures (Wandjina Drawings) Penguins in Mediterranean Mammoths and Elephants in America Michigan Tablets Rabbit-in-Moon Motif: Its Diffusion Rock Art and Echoes Anubis Cave Art Egypt in America Elephant Slabs Stone Age Art Sophistication Ostrich Domestication as Shown in Art Serpent Motif: Diffusion Pedra Furada Rock Art Holly Oak Pendant Fraud Tennessee Cave Art Red Bands in Caves Egypt in Australia Egypt in South Africa Mammoths in Egypt Ohio Copper Tablets China in South America Egyptian Electricity Palenque Astronaut China in India Jinmium [MGS Symbols] Horses in South America Microscopic Engraving MGQ QUIPUS ...
Terms matched: 2 - Score: 156 - 15 May 2017 - URL: /cat-arch.htm
