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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
FIPS County or equivalent State or equivalent ; 01001 Autauga County Alabama 01003 Baldwin County: 01005 Barbour County: 01007 Bibb County: 01009 Blount County: 01011 Bullock County ...
SELCAL. In international aviation, SELCAL or SelCal is a selective-calling radio system that can alert an aircraft's crew that a ground radio station wishes to communicate with the aircraft. SELCAL uses a ground-based encoder and radio transmitter to broadcast an audio signal that is picked up by a decoder and radio receiver on an aircraft. The ...
The loop antenna is used for automatic radio compass. [1] [2] An automatic direction finder ( ADF) is a marine or aircraft radio-navigation instrument that automatically and continuously displays the relative bearing from the ship or aircraft to a suitable radio station. [3] [4] ADF receivers are normally tuned to aviation or marine NDBs ( Non ...
The Parsons code, formally named the Parsons code for melodic contours, is a simple notation used to identify a piece of music through melodic motion – movements of the pitch up and down. [1] [2] Denys Parsons (father of Alan Parsons [3] ) developed this system for his 1975 book The Directory of Tunes and Musical Themes .
The AN/TPQ-37 is an electronically steered radar, meaning the radar does not actually move while in operation. The radar scans a 90-degree sector for incoming rocket, artillery and mortar fire. Upon detecting a possible incoming round, the system verifies the contact before initiating a track sequence, continuing to search for new targets.
Lidar ( / ˈlaɪdɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.
The Type Allocation Code (TAC) is the initial eight- digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network ...