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The blind velocity for a specific pulse repetition frequency (PRF) is an integer multiple of the following, which causes the signal to have zero doppler. B l i n d V e l o c i t y = ( C × P R F 2 × T r a n s m i t F r e q u e n c y ) {\displaystyle Blind\ Velocity=\left({\frac {C\times PRF}{2\times Transmit\ Frequency}}\right)}
Pulse-Doppler radar uses the following signal processing criteria to exclude unwanted signals from slow-moving objects. This is also known as clutter rejection. [5] Rejection velocity is usually set just above the prevailing wind speed (10 to 100 mph or 20 to 160 km/h). The velocity threshold is much lower for weather radar.
The system was developed partly because access to foreign government-controlled global navigation satellite systems is not guaranteed in hostile situations, as happened to the Indian military in 1999 when the United States denied an Indian request for Global Positioning System (GPS) data for the Kargil region, which would have provided vital information. [22]
Elon Musk said Starlink satellite internet is inactive in India, his first comments since authorities seized two of the company's devices in recent weeks, one in an armed conflict zone and another ...
Pulse-Doppler signal processing is a radar and CEUS performance enhancement strategy that allows small high-speed objects to be detected in close proximity to large slow moving objects. Detection improvements on the order of 1,000,000:1 are common.
"East Asian exports are a bellwether for the global economy, and these numbers corroborate negative signals from leading indicators of global trade," the analysts said in a Monday note.
By storing the phase signal, instead of the original analog signal, or video, and comparing the stored and current signal for changes in phase, the moving targets are revealed. This technique is far more resistant to noise, and can easily be tuned to select different velocity thresholds to filter out different types of motion. [1]
Tesla's stock price reached $420 on Wednesday afternoon, which elicited responses from social media users and the company's CEO, Elon Musk. "As foretold in the prophecy," Musk wrote in an X post ...