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A second form of precise monitoring is called carrier-phase enhancement (CPGPS). [1] The error, which this corrects, arises because the pulse transition of the PRN is not instantaneous, and thus the correlation (satellite–receiver sequence matching) operation is imperfect. The CPGPS approach utilizes the L1 carrier wave, which has a period of
Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. [1] It uses measurements of the phase of the signal's carrier wave in addition to the information content of the signal and relies on a single reference station or interpolated virtual station to ...
List of aircraft carriers of the United States Navy Hull no. Name Image Class Commissioned Decommissioned Service life Status Ref. CV-1 Langley: Langley : 20 March 1922 27 February 1942 19 years, 344 days Sunk near Cilacap, Java in 1942 [13] [14] [15] CV-2 Lexington: Lexington (lead ship) 14 December 1927 8 May 1942 14 years, 145 days
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The AN/UYK-7 computer controls SPY-1. [5]: 316–317 SPY-1A 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.
This is a list of aircraft carriers which are currently in service, under maintenance or refit, in reserve, under construction, or being updated. An aircraft carrier is a warship with a full-length flight deck , hangar and facilities for arming, deploying, and recovering aircraft. [ 1 ]
Phasor notation (also known as angle notation) is a mathematical notation used in electronics engineering and electrical engineering.A vector whose polar coordinates are magnitude and angle is written . [13] can represent either the vector (, ) or the complex number + =, according to Euler's formula with =, both of which have magnitudes of 1.
Each symbol is encoded as a different phase shift of the carrier sine wave: 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°. A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase-shift keying. [1]