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Long baseline systems get their name from the fact that the spacing of the baseline transponders is long or similar to the distance between the diver or vehicle and the transponders. [3] That is, the baseline transponders are typically mounted in the corners of an underwater work site within which the vehicle or diver operates.
The following list shows specific aeronautical transponder codes (typically called squawk codes), and ranges of codes, that have been used for specific purposes in various countries. Traditionally, each country has allocated transponder codes by their own scheme with little commonality across borders. The list is retained for historic interest.
Many ETC systems use transponders like this one to electronically debit the accounts of registered cars without their stopping. Transponder used in Chile for some expressways ETC Built-in Onboard device in a Nissan Fuga vehicle in Japan Genesis G70 vehicle with South Korea's ETC System Hi-pass Terminal A RFID MTAG used for electronic toll collection on controlled-access highways/motorways ...
E-ZPass is an electronic toll collection system used on toll roads, toll bridges, and toll tunnels in the Eastern, Midwestern, and Southeastern United States.The E-ZPass Interagency Group (IAG) consists of member agencies in several states, which use the same technology and allow travelers to use the same transponder on toll roads throughout the network.
Transponder based systems make use of fixed antenna loops or beacons (called balises) that transmit datagrams or other information to a train as it passes overhead. While similar to intermittent inductive systems, transponder based cab signalling transmit more information and can also receive information from the train to aid traffic management.
NationalPass tags include transponders for IAG/TDM (e.g. E-ZPass), SeGo (e.g. TxTag), Title-21 (e.g. FasTrak), and ATA (e.g. EZ TAG). TransCore establishes fleet accounts with each of the interoperable states and bills NationalPass customers directly. No changes or special accommodations are required by the participating states. [4]
Next, the customer receives a small, white radio frequency transponder which must be affixed to the inside of their windshield behind their rear view mirror. Finally, when passing through a toll plaza, the driver chooses lanes specially equipped with sensors that can read EZ TAG transmitters and deduct the appropriate amount from their accounts.
The transponder emits a signal when it is interrogated by the secondary radar. In a transponder based system signals drop off as the inverse square of the distance to the target, instead of the fourth power in primary radars. As a result, effective range is greatly increased for a given power level.