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#21
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On Jan 5, 7:27*pm, jkochko68 wrote:
At 25 knots you can move move a hell of a long way in 24 hours. Do the math the area to search is pi*r*r where r is 24*25 in nautical miles, thats a LARGE search area I'm not an expert but won't a sat in a polar orbit, orbit the Earth once every 90 minutes? So like I said before if you are using three, four or more sats its going to get darn near impossible to evade detection assuming your carrier and rest of the strike group are not stealthy and actually get to where you need to go in order to conduct your mission. Of course you can attack the sats but that shoots the hell out of the catching your foe unprepared and perhaps will be viewed as a major provocative act. If China and Taiwan get hot that may be viewed as one thing but if China goes after strategic U.S. assets... yeah but its the SU that had all the LEO sats that they spit out like popcorn kernals. Ours were higher. Mostly. They were pretty good at launching for specific targets of opportunity. we never did that. |
#22
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On Jan 5, 7:10*pm, Dan wrote:
jkochko68 wrote: On Jan 2, 1:56 pm, Timur wrote: http://x.bbs.sina.com.cn/forum/pic/4e286bac010472cv I would not be overly worried about that carrier. Our recon. sats will have eyes on it 24/7 and with B-52s with tomahawks its a sitting duck. It does not change the balance of power much as China lacks the other effective arms to go with the carrier. Their submarine capabilities are a joke as is their surface navy as a whole. China should have been smart and built a real navy 1st and eventually grew into a carrier. One carrier will prove much easier to sink than an entire navy. I don't see why China bought that carrier unless they really want to use it to confront the U.S. which they are nowhere near in a position to effectively do unless they are crazy or very smart and certain our weak and inept president will back down. That can't be do much the case though b/c they bought the carrier and started to re-fit it long before *we* elected a communist. JK So, when do you think America will ever elect a communist??? Don't even try to look even more foolish and claim we already have... Dan Didn't you get your Bircher newsletter? Ike was the first. Had Commies in State, Treasury, the Army, The HEALTH DEPT by God, floridation..... Birchers are co sponsoring the Conservative Causus this year. Stay tuned could get really interesting. |
#23
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On Jan 5, 6:16*pm, Chris wrote:
On Jan 5, 6:15*pm, frank wrote: SOSUS was retired and shut down. Little thing with Walker giving away the candy store to the SU on how we tracked subs. Completely wrong. SOSUS is still operational, though there are fewer NAVFAC's operating and now SURTASS is generally preferred: both because of the operational flexibility that the T-AGOS have and the vastly easier maintenance (and upgrade) opportunities that they provide. And Walker doesn't really match the timelines for when the IUSS (the acronym for the combination of the two) started to decline: the fall of the USSR and the dramatic drop in the number of submarines we needed to track in the open ocean does (the drawdown seems to start in the mid 1990's). Chris Manteuffel Not even close to what it was. In large part due to prop design on their end. Some other engineering stuff. Walker did a ton of damage. Pollard came close for a lot of other reasons. Unfortunately both are well fed. I could see civic programs to find old fallout shelter supplies and ship them to those two in the prison system. Without a can opener. Give them some incentive in their cells. |
#24
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frank wrote:
On Jan 5, 7:10 pm, Dan wrote: jkochko68 wrote: On Jan 2, 1:56 pm, Timur wrote: http://x.bbs.sina.com.cn/forum/pic/4e286bac010472cv I would not be overly worried about that carrier. Our recon. sats will have eyes on it 24/7 and with B-52s with tomahawks its a sitting duck. It does not change the balance of power much as China lacks the other effective arms to go with the carrier. Their submarine capabilities are a joke as is their surface navy as a whole. China should have been smart and built a real navy 1st and eventually grew into a carrier. One carrier will prove much easier to sink than an entire navy. I don't see why China bought that carrier unless they really want to use it to confront the U.S. which they are nowhere near in a position to effectively do unless they are crazy or very smart and certain our weak and inept president will back down. That can't be do much the case though b/c they bought the carrier and started to re-fit it long before *we* elected a communist. JK So, when do you think America will ever elect a communist??? Don't even try to look even more foolish and claim we already have... Dan Didn't you get your Bircher newsletter? Ike was the first. Had Commies in State, Treasury, the Army, The HEALTH DEPT by God, floridation..... Birchers are co sponsoring the Conservative Causus this year. Stay tuned could get really interesting. Henry Wallace, one of FDR's vice-presidents had definite communist tendencies. Dan, U.S. Air Force, retired |
#25
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![]() "jkochko68" wrote in message ... At 25 knots you can move move a hell of a long way in 24 hours. Do the math the area to search is pi*r*r where r is 24*25 in nautical miles, thats a LARGE search area I'm not an expert but won't a sat in a polar orbit, orbit the Earth once every 90 minutes? More like 100 and the earth rotates under it so it doesnt return to the same spot. Any given location will be visited once a day or so. The very detailed pictures that recon birds return paradoxically makes searching the returned pictures for the carrier group a painstaking job. Imagine using Google StreetView to scan a medium sized town for a single vehicle. Satellite orbits are predictable and minimising their overflight is a tactic that any competent naval commander understands. Reconnnaisance satellites are excellent tools for examining a specified location but they are very limited when it comes to real time maritime search. This is why the US uses the P3 Orion So like I said before if you are using three, four or more sats its going to get darn near impossible to evade detection assuming your carrier and rest of the strike group are not stealthy and actually get to where you need to go in order to conduct your mission. Incorrect and the assumption that you know the mission is likely to be wrong. In Dec 1941 the USN thought the mission of the IJN carriers would be Malaya , the NEI or the Phillipines. Oops Of course you can attack the sats but that shoots the hell out of the catching your foe unprepared and perhaps will be viewed as a major provocative act. If China and Taiwan get hot that may be viewed as one thing but if China goes after strategic U.S. assets... China cannot realistically interdict strategic US assets with a carrier. Its much more likely they want to project power tactically in disputed areas such as the Spratly's where their rivals dont have that capability. Keith |
#26
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![]() "jkochko68" wrote in message ... Well I recall that when the Air Force was considering a shuttle program of their own and building a launch complex out at Vanderberg they had a abort base up in Alaska so if something went wrong the shuttle could land their after only one orbit or even abort to it if it could not make orbit for some reason. There was a requirement that it had to have about 200 miles of cross range min. so it could make use of different fields not directly along its glidepath. Those larger wings may even help it bank hard on reentry back and forth to high AOA to bleed to bleed off its speed. The 200 mile cross range was b/c thats roughly how far away one pt. on Earth would be after a 90 minute orbit. Very interesting but entirely irrelevant to the subject at hand More like 100 and the earth rotates under it so it doesnt return to the same spot. Any given location will be visited once a day or so. The very detailed pictures that recon birds return paradoxically makes searching the returned pictures for the carrier group a painstaking job. Imagine using Google StreetView to scan a medium sized town for a single vehicle. Satellite orbits are predictable and minimising their overflight is a tactic that any competent naval commander understands. Yeah but dodging multiple sats.,,, and I seriously doubt our intel would be studying photos of the ocean. More likely they would look at thermal and radar blimps the computer brought to their attention. What radar blips ? Radar satellites are an entirely different animal to recon birds. They require large power sources and typically have low orbits that decay rapidly. The former USSR spent large amounts of cash on RORSAT's , they were nuclear powered and rather expensive. Now there are a number of SAR satellites out there which are typically used for weather surveillance. In theory such birds can be used to track ships wakes but you still need to confirm you are dealing with a carrier not a container ship. U.S. Air Force and Space Command are developing a satellite constellation known as Space-Based Radar which will have martimime recon capability however the first operational spacecraft will not be launched before 2015 and the plans call for a constellation of only nine satellites Work is proceeding on using commercial SAR for semi-autonomous ship detection systems. Dedicated algorithms can yield information on ship size, shape and even speed based on Doppler effects extracted from displaced ship wakes in the SAR signal. but these systems are not yet fielded in quantity and still only give you an indication of ship size and speed. There are an awful lot of bulk carriers, Panamax container ships and tankers that will provide similar radar returns to a carrier. Its likely the task force would not be using the shipping lanes so they would further stand out. Not a wise assumption if you consider such a force a serious threat. Keith |
#27
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On Jan 5, 7:49*pm, "Keith Willshaw"
wrote: "Jack Linthicum" wrote in message ... On Jan 5, 12:20 pm, "Keith Willshaw" wrote: "jkochko68" wrote in message .... On Jan 2, 1:56 pm, Timur wrote: http://x.bbs.sina.com.cn/forum/pic/4e286bac010472cv I would not be overly worried about that carrier. Our recon. sats will have eyes on it 24/7 and with B-52s with tomahawks its a sitting duck.. There are a couple of problems with this theory 1) Recon satellites are not able to monitor a given ship 24/7 They are typically in polar orbits and a given satellite will only overfly a specified target for a matter of minutes per day 2) The typical antiship missile used by the B-52 is the AGM-84 Harpoon Since this has a relatively short range you wouldnt want to risk an unescorted B-52 that close to a carrier. Keith = I think some of the shots of the carrier building in the Ukraine, way = back when, surprised the Soviets when they were published. Perhaps = some improvement in oblique *shots. I am sure they hav BUT good photos of a shipyard are a far cry form real time surveillance. Keith You have to know that it is there, the state of its being complete before you can target the place for further information. I would say the knowledge that it was an aircraft carrier, hole for the elevator gave it away I seem to remember, is enough to start on. |
#28
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On Jan 5, 9:04*pm, "David E. Powell" wrote:
On Jan 5, 8:14*pm, Dan wrote: Chris wrote: On Jan 5, 6:15 pm, frank wrote: SOSUS was retired and shut down. Little thing with Walker giving away the candy store to the SU on how we tracked subs. Completely wrong. SOSUS is still operational, though there are fewer NAVFAC's operating and now SURTASS is generally preferred: both because of the operational flexibility that the T-AGOS have and the vastly easier maintenance (and upgrade) opportunities that they provide. And Walker doesn't really match the timelines for when the IUSS (the acronym for the combination of the two) started to decline: the fall of the USSR and the dramatic drop in the number of submarines we needed to track in the open ocean does (the drawdown seems to start in the mid 1990's). Chris Manteuffel * *Back during the depths of the Cold War I thought it would have been fun to tweak the Soviet's version of SOSUS by deliberately sinking a retired U.S. submarine in such a way the Soviets would detect it. It would have been a gas to sit back and watch the Soviets going nuts trying to figure out what happened. Dan, U.S. Air Force, retired Like a retired GUPPY (Or pre Guppy) sunk in a deep spot right near their cable? And reveal that we knew where their cable was, what it was used for and perhaps that we were running submarines they couldn't detect into their defense zone? |
#29
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On Jan 6, 3:00*am, Dan wrote:
frank wrote: On Jan 5, 7:10 pm, Dan wrote: jkochko68 wrote: On Jan 2, 1:56 pm, Timur wrote: http://x.bbs.sina.com.cn/forum/pic/4e286bac010472cv I would not be overly worried about that carrier. Our recon. sats will have eyes on it 24/7 and with B-52s with tomahawks its a sitting duck.. It does not change the balance of power much as China lacks the other effective arms to go with the carrier. Their submarine capabilities are a joke as is their surface navy as a whole. China should have been smart and built a real navy 1st and eventually grew into a carrier. One carrier will prove much easier to sink than an entire navy. I don't see why China bought that carrier unless they really want to use it to confront the U.S. which they are nowhere near in a position to effectively do unless they are crazy or very smart and certain our weak and inept president will back down. That can't be do much the case though b/c they bought the carrier and started to re-fit it long before *we* elected a communist. JK So, when do you think America will ever elect a communist??? Don't even try to look even more foolish and claim we already have... Dan Didn't you get your Bircher newsletter? Ike was the first. Had Commies in State, Treasury, the Army, The HEALTH DEPT by God, floridation..... Birchers are co sponsoring the Conservative Causus this year. Stay tuned could get really interesting. * *Henry Wallace, one of FDR's vice-presidents had definite communist tendencies. Dan, U.S. Air Force, retired Which were? |
#30
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Well I recall that when the Air Force was considering a shuttle
program of their own and building a launch complex out at Vanderberg they had a abort base up in Alaska so if something went wrong the shuttle could land their after only one orbit or even abort to it if it could not make orbit for some reason. There was a requirement that it had to have about 200 miles of cross range min. so it could make use of different fields not directly along its glidepath. Those larger wings may even help it bank hard on reentry back and forth to high AOA to bleed to bleed off its speed. The 200 mile cross range was b/c thats roughly how far away one pt. on Earth would be after a 90 minute orbit. More like 100 and the earth rotates under it so it doesnt return to the same spot. Any given location will be visited once a day or so. The very detailed pictures that recon birds return paradoxically makes searching the returned pictures for the carrier group a painstaking job. Imagine using Google StreetView to scan a medium sized town for a single vehicle. Satellite orbits are predictable and minimising their overflight is a tactic that any competent naval commander understands. Yeah but dodging multiple sats.,,, and I seriously doubt our intel would be studying photos of the ocean. More likely they would look at thermal and radar blimps the computer brought to their attention. Its likely the task force would not be using the shipping lanes so they would further stand out. JK |
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