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#11
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![]() "Joe" wrote in message om... "Donal" wrote in message ... "Joe" wrote in message om... If you see a ghost on radar are you seeing boobsie? If not what are you seeing, and how would you define a ghost? Good for 1.5 asa points Joe, I'm only answering because I know that it will really hurt you to give me some points! A Ghost is the image that appears on your radar screen as a result of the signal that bounced off the real target, and then bounced off of your boat before being bounced off the real target again. Where did you get that line of BS Donal? Is that a yachtmaster physic explaination? No it isn't. I got it from the manual that came from my Radar. However, I have noticed that somebody else has said that the signal may have bounced off a third party to produce the ghost. I agree with them. I know that you weren't able to understand that explanation - so I'll have another go. A Ghost is a false image on your Radar screen. Thats not correct either. Anyone else wanna try to provide the correct answer before I set Donal strait? Go on Joe .... set me strait. Regarghds Donal -- |
#12
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"Donal" wrote in message ...
"Joe" wrote in message om... "Donal" wrote in message ... "Joe" wrote in message om... If you see a ghost on radar are you seeing boobsie? If not what are you seeing, and how would you define a ghost? Good for 1.5 asa points Joe, I'm only answering because I know that it will really hurt you to give me some points! A Ghost is the image that appears on your radar screen as a result of the signal that bounced off the real target, and then bounced off of your boat before being bounced off the real target again. Where did you get that line of BS Donal? Is that a yachtmaster physic explaination? No it isn't. I got it from the manual that came from my Radar. However, I have noticed that somebody else has said that the signal may have bounced off a third party to produce the ghost. I agree with them. I know that you weren't able to understand that explanation - so I'll have another go. A Ghost is a false image on your Radar screen. Thats not correct either. Anyone else wanna try to provide the correct answer before I set Donal strait? Go on Joe .... set me strait. Regarghds Ok Its a radar signal thats source can not be readily determined. Or its a signal that is not repeated on each and every sweep that is made by your radar. Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. You should write your radar mfg. and let them know the true meaning of a ghost, they assume that a ghost is not a real target and in doing so they might get someone hurt if they are running at high speeds. Often huge stumps return ghost signals as they bob in and out of the water. Joe Donal -- |
#13
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![]() Joe wrote: Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. So what is an radar angel? Cheers |
#14
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![]() Joe wrote: Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. Prime example of "One man's ghost" is another man's intermittent target. I wouldn't call any of you wrong, once I understood what your description was, though your above does not fall into MY description of "ghost" even though I can see where it might from your perspective. otn |
#15
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![]() Bart Senior wrote Source for next bit was Dutton's. A ghost image is a false image moving in parallel of a real object being tracked. They tend to be more of an arc shape or fuzzy in shape compared to the sharper image or a real object. My interpretation based on my radar training. They are formed by the signal taking a longer path to the object. Most commonly from a reflection off some other part of a larger vessel. This could change the beam shape of the radar. Sometimes you can get echos off thunderstorms. This next bit was a joke. An optical coupler can't be shorted out because it's is a card with holes cut in and and blocks or passes light to a sensor. Or perhaps your optical coupler has shorted out. grin Joe wrote If you see a ghost on radar are you seeing boobsie? If not what are you seeing, and how would you define a ghost? |
#16
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![]() "otnmbrd" wrote in message ink.net... Joe wrote: Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. Prime example of "One man's ghost" is another man's intermittent target. I wouldn't call any of you wrong, once I understood what your description was, though your above does not fall into MY description of "ghost" even though I can see where it might from your perspective. Otn, Your post was so polite, that Joe might be under the false impression that you agree with him. I trust that my clarification will prevent lurkers from comimg to the false conclusion that you don't know what you are talking about. Regards Donal -- |
#17
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![]() Donal wrote: Joe wrote: Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. Prime example of "One man's ghost" is another man's intermittent target. I wouldn't call any of you wrong, once I understood what your description was, though your above does not fall into MY description of "ghost" even though I can see where it might from your perspective. Otn, Your post was so polite, that Joe might be under the false impression that you agree with him. I trust that my clarification will prevent lurkers from comimg to the false conclusion that you don't know what you are talking about. G As Stated, I wouldn't call Joe's "ghost" a "ghost", but I've become a firm believer in "One man's fwd spring, is another man's after spring", as I've heard many knowledgeable people use different definitions to describe this phenomena. For my money, the greatest cause of "ghost" is "operator error", i.e. to much gain/intensity for the given range scale setting, though I would also include odd ball targets where none exist due to any number of possible causes .... keep in mind, I'm an operator not a technician, though Gawd help the Techie that tries to tell me that some conditions are normal for radar in general or a specific radar, when I know better. As for people coming to false conclusions about the substance of what I might say in a thread, hey, I'm good, but I'm not perfect ....show me the errors. otn |
#18
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"Donal" wrote in message ...
"otnmbrd" wrote in message ink.net... Joe wrote: Sometimes a ghost is a reflection that you and nav describe, sometimes it is an object that is so low or has such a lousy return that it only shows up when you and the target or on the crest of waves or when the target is ata angle to reflect your signal. So it may indeed be a real target but when it keeps disappearing and returning from the scope it is called a ghost. Prime example of "One man's ghost" is another man's intermittent target. I wouldn't call any of you wrong, once I understood what your description was, though your above does not fall into MY description of "ghost" even though I can see where it might from your perspective. Otn, Your post was so polite, that Joe might be under the false impression that you agree with him. I trust that my clarification will prevent lurkers from comimg to the false conclusion that you don't know what you are talking about. Regards Donal -- Hey Donal, Do not take my word for it, look it up in Bowditch the American pratical navigator. Joe |
#19
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![]() "Joe" wrote in message om... Hey Donal, Do not take my word for it, look it up in Bowditch the American pratical navigator. What is Bowditch? Regards Donal -- |
#20
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Donal wrote:
What is Bowditch? Now that is funny! -- jlrogers±³© Never date a woman you can hear ticking. - Mark Patinkin Eschew Obfuscation. |
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