For number one, I can't really compare them because they're not the same data set, unfortunately. It looks like RA could be adding in some error to the LOBs but I can't tell for certain because I don't know what the contact was doing.
2. This is anomalous data that you get when your towed array changes position/orientation after you've changed course or depth, likely with speed changes too but the effect is minimal (I can't recall a speed change greatly affecting towed data). The towed array is meant to work in steady state conditions, i.e., when it has little to no relative motion like when you're cruising along at 5 knots with no speed, depth, or course changes. When you change your speed, course, or depth, the towed goes into a transient condition as it moves between steady-state conditions. During the transient condition, it does not give reliable data. This is just a fact of nature of the towed. These transients can be reduced by going faster, which has other consequences, of course. This is why I like to use the sphere or conformal (hull-bound sensors) when I can because they don't suffer from these transient conditions.
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