# Thread Subject: Simple problem ...

 Subject: Simple problem ... From: Cris ToPh Date: 6 Apr, 2010 20:28:22 Message: 1 of 3 Hi, I need one of numerous experts around this forum. it's a simple problem so if u can help me .. of give to me some references... Assume a isotropic sensor emiting a time t=0 a frontwave. The radius of detection is R and celerity is c. So tmax = R/c is the time horizon of the problem. Assume a target with a rectilign motion p(t) = p0 + ut where p0 is the initial position and u is the director vector ... (such that ||u|| << c) My question is : find the time 0
 Subject: Simple problem ... From: Bruno Luong Date: 6 Apr, 2010 20:47:20 Message: 2 of 3 "Cris ToPh" wrote in message ... > Hi, > > I need one of numerous experts around this forum. > > it's a simple problem so if u can help me .. of give to me some references... > > Assume a isotropic sensor emiting a time t=0 a frontwave. The radius of detection is R and celerity is c. So tmax = R/c is the time horizon of the problem. > > Assume a target with a rectilign motion p(t) = p0 + ut where p0 is the initial position and u is the director vector ... (such that ||u|| << c) > > My question is : find the time 0
 Subject: Simple problem ... From: Roger Stafford Date: 6 Apr, 2010 20:49:21 Message: 3 of 3 "Cris ToPh" wrote in message ... > Hi, > > I need one of numerous experts around this forum. > > it's a simple problem so if u can help me .. of give to me some references... > > Assume a isotropic sensor emiting a time t=0 a frontwave. The radius of detection is R and celerity is c. So tmax = R/c is the time horizon of the problem. > > Assume a target with a rectilign motion p(t) = p0 + ut where p0 is the initial position and u is the director vector ... (such that ||u|| << c) > > My question is : find the time 0

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