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Foundation Fieldbus
Published in Sunit Kumar Sen, Fieldbus and Networking in Process Automation, 2014
Foundation Fieldbus supports an application clock distribution function. It is usually set and adjusted to local time of the day or to some universal coordinated time. System management contains a time publisher that periodically sends an application clock synchronization schedule message to all connected fieldbus devices. The data link scheduling time is sampled and sent along with the application clock message. This allows the receiving devices to adjust their local application time. In between the synchronization time message, the application clock time is independently maintained in each device based on their internal clocks.
DREAMS Architectural Style
Published in Hamidreza Ahmadian, Roman Obermaisser, Jon Perez, Distributed Real-Time Architecture for Mixed-Criticality Systems, 2018
R. Obermaisser, M. Abuteir, H. Ahmadian, P. Balbastre, S. Barner, M. Coppola, J. Coronel, A. Crespo, P. Balbastre, G. Fohler, G. Gala, M. Grammatikakis, A. Larrucea Ortube, T. Koller, Z. Owda, D. Weber
Time can be global or local. Global time refers to a monotonic clock of the system (HW_CLOCK). Local time refers to a partition clock that runs when the partition is executed (EXEC_CLOCK). Timers can be set taking as a reference the global or the local time.
The Earth–Sun Relationship
Published in Matt Fajkus, Dason Whitsett, Architectural Science and the Sun, 2018
To mitigate confusion about the proper time standard for any location and date, the current official time in any location is known as local time. Local time is the same as local standard time, except when daylight saving time is in effect.
Constant-level spatio-temporal integrated search algorithm for repeating sun-synchronous orbit satellite images
Published in International Journal of Digital Earth, 2021
Each Landsat 8 scene has a metadata file containing its spatial coverage and temporal information. The temporal information includes the acquisition date, beginning time (the corresponding time when the scene starts to be recorded), end time (the corresponding time when the recording ends), and product generated date. The time information is defined in Coordinated Universal Time (UTC) and local time. The spatial information includes the coordinates of the four corners and the center of the scene and the corresponding path and row numbers.