|
thewood1 -> RE: Aegis Combat System (3/2/2018 3:56:44 PM)
|
Note that all the sources that discuss the series of upgrades say nothing about increasing radar power, but on computing and signal processing. Do you have sources on increasing power of the radar itself.
From wiki so take it for what it is...
SPY-1A upgrade is a development of SPY-1, resulting from the deployment of SPY-1 equipped USS Ticonderoga off the Lebanese coast. It was discovered that the false alarm rate was high because the radar would pick up swarms of insects and clutter from mountainous terrain. The solution is to allow the operator to change the sensitivity profile of radar by periodically reducing attenuation, and to set threat and non threat sectors according to changing environment.[5] The result is more efficient utilization of resources. About 10% of the software totaling thirty thousand lines had to be rewritten to accommodate the necessary upgrade.[5] In 2003, the U.S. Navy donated a SPY-1A antenna to the National Weather Service in Norman, Oklahoma, making it one of the first stationary Phased Arrays used in weather forecasting.
SPY-1B is the model adopts VLSI resulting in increased performance and reduced size and weight. For example, the electronic cabinets area reduced from 11 to 5, with corresponding weight reduced from 14700 lb to 10800 lb, and separate digital modules are reduced from 3806 to 1606.[5] 7-bit phase shifter replaced the 4-bit phase shifter in earlier models, with corresponding weight of phase shifters in face of the antenna reduced from 12000 lb to 7900 lb, and a reduction of side lobe by 15 dB.[5] There are 4350 radiators with two side lobe cancellation antenna, each with two elements, and the radar uses eleven 16-bit microprocessors.[5] Ability to counter steep diving missiles are improved with more energy at higher elevation or longer pulse.[5]
SPY-1B(V) is development of earlier SPY-1B with moving target indication capability incorporated in 1997.[5]
SPY-1D was first installed on Arleigh Burke in 1991, with all antenna in a single deckhouse. It is a variant of the -1B to fit the Arleigh Burke class using UYK-43 computer, with the main antenna also used as missile uplinks, thus eliminate the need of separate missile uplink in earlier models, and the UYA-4 display in earlier models is replaced by UKQ-21 display.[5]
SPY-1D(V), the Littoral Warfare Radar, was an upgrade introduced in 1998 with new track initiation processor for high clutter near-coast operations, where the earlier "blue water" systems were especially weak. The wave form is coded and signal processing is improved.[5]
end quote
The B upgrade mentions energy, but is vague about the amount, but also very specific to certain types of missiles. Note the the same article is very specific that the range spec of 175nm is for A/B/D.
|
|
|
|
