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Timetag for pc12/21/2023 ![]() For example, measurements of perturbations must be time-tagged with errors of less than 0.001 sec. ![]() GNSS can provide the synchronization to achieve efficient power flow. The growing integration of networks for energy distribution and the emphasis on energy savings and efficiency require increasingly precise and accurate synchronization. Network synchronization for power generation and distribution GNSS is being used as a precise time source in several areas, such as: The accuracy achieved by GNSS-based time synchronization using GPS is <40 ns 95% of time. This is done by the receiver’s processor using an approximation method involving signals from at least four satellites. The solution is to re-set the receiver’s time to the satellite’s time continuously. Quartz oscillators are very accurate when measuring times of less than a few seconds, but rather inaccurate over longer periods. The receiver's clocks, however, are small quartz oscillators like those found in a wristwatch. This is achieved by continuously synchronizing all on-board atomic clocks with a master clock on the ground. įor this system of measurement to work, all satellites need to be synchronized so that they can start transmitting their signals at precisely the same time. This allows the user to determine the position of the satellite and his own distance from it with a high degree of accuracy. Each signal contains information on the time reference of the atomic clock on board the satellite and information on the satellite’s orbit. The distances are calculated by measuring the time that a certain signal, known to the receiver and transmitted by the satellite, takes to travel the distance between the satellite and the user. three satellites), the receiver on the ground can calculate its position. Knowing the distance from at least three points (i.e. The operation of satellite navigations systems is based on the method of triangulation. This form of timing is the most stable and accurate reference that has ever been developed. Atomic clocks use the oscillations of a particular atom as their “metronome”. PC/104-Plus versions of the BU-65578 series are currently available and a PCI/104 version is planned for later this year.Navigation satellites have extremely precise atomic clocks on board. The high-level library functions abstract all register accesses and memory allocation so that no specific hardware knowledge is required. The BU-65578 includes High-Level C API (Application Programming Interface) Library Software that supports all advanced architectural features, and driver support for VxWorks, Linux, and Windows for MIL-STD-1553 functionality. Each 1553 channel can emulate a Bus Controller, Remote Terminal, or a Bus Monitor and also includes a combined RT/Monitor that can monitor all 1553 communications on the bus including the channel’s own RT address. The architecture supports new standard features for each 1553 channel such as 2 MB RAM with parity per channel, 48-bit / 1 micro-second time tag synchronized to an IRIG-B input, low CPU utilization, and built in self test. “Our new E²MA Architecture is based on our field proven, industry standard, Enhanced Mini-ACE and adds many new capabilities while maintaining full software compatibility with previous generations of our products”, states Todd Decker, DDC’s MIL-STD-1553 Marketing Manager. ![]() The PC/104-Plus card utilizes DDC’s new Extended Enhanced Mini-ACE (E2MA) Architecture. “We have selected DDC’s PC/104 cards for use in our flight data recorders that require a MIL-STD-1553 bus due to the product’s high quality and proven reliability”, states Marcella B. Enertec America, a leading designer and manufacturer of mission video and data recorders, selected DDC’s new card. This ruggedized card is a COTS solution that can be used in both convection and conduction cooled applications. Bohemia, New York (July 18, 2006) Data Device Corporation (DDC), an international leading supplier of highreliability data interface products, introduces a new BU-65578C PC/104-Plus MIL-STD-1553 card that provides up to four dual redundant 1553 channels, five user-programmable digital discrete I/Os, and an IRIG-B time synchronization input.
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