Abstract: A method, apparatus, and system detect a speed of a vehicle. Laser beams are emitted into an atmosphere from the vehicle. The laser beams are emitted in different directions from the vehicle. Sets of backscatter light are generated in response to transmitting the laser beams into the atmosphere from the vehicle. The sets of backscatter light have frequency shifts relative to the frequency of the laser beams. A set of beat frequencies from interfering the sets of backscatter light with each other is measure. The speed of the vehicle is determined using the set of beat frequencies.

Abstract: A method, apparatus, and system detects a speed of a vehicle. A backscatter light generated in response to transmitting a laser beam into an atmosphere during movement of the vehicle is received. A first beat frequency from interfering a first portion of the backscatter light with a reference light derived from the laser beam is measured. A time delay is introduced to a second portion of the backscatter light to form a time delayed backscatter light. A second beat frequency from interfering the time delayed backscatter light with the reference light is measured. The second beat frequency is time delayed from the first beat frequency. A difference between the first beat frequency and the second beat frequency is determined. The speed of the vehicle using the difference between the first beat frequency and the second beat frequency is determined.

Abstract: An event translator system may perform at least three tasks: (1) extract or “harvest” date, time, description, and other information from digital files generated for human reading, such as web calendars or other event lists, emailed calendars, and imported files; (2) present the extracted event data to a user for modification, management, and monitoring; and (3) export the events to PIM software, web pages and/or application programming interfaces as appropriate file formats. The event translation system may be incorporated into a web site that is accessed by the user who enters a desired web address for event translation or otherwise transmits the digital files for translation. Alternatively, the system may be incorporated into a webpage as a browser plug-in that provides a user-selectable option to extract event information from a visited webpage.