Find best premium and Free Joomla templates at GetJoomlaTemplatesFree.com

Monitor & Control

The Monitor and Control (M&C) subsystem will control the primary functions of the MWA, namely tile beamformer pointing and signal configuration of the tiles, selection of the 32MHz receiver output bands in the receiver and selection of array beamformer pointing and modes. It will supervise the data pipeline through the receivers, correlator and Real Time System, and provide the feedback path for monitoring the operation and health of the array and all functional components. Monitoring functions include environmental conditions, reporting of receiver actions (for RFI excision), and health of various central digital processing systems. The M&C system will interface to a GUI for array control, which must support remote observations.

The user interface with the M&C subsystem will be basic, intended for expert use only. The M&C system will set up the hardware and monitor its behavior. The M&C aims the data pipeline at the Real Time System (RTS), providing the RTS with the parameters it needs to proceed with calibration and application of the calibration parameters to the pipeline processing. In return, the RTS sends back the calibration parameters needed for certain observing modes, such as the IPS(phased-array, or pulsar) mode, and these gains/phases/delays are relayed to the correlator subsystem for use in steering the array beam(s).

Figures 1-4 are schematic outlines of principal Monitor and Control components and the devices to which they must interface. These include:

  1. Identification of the main M&C components and their interfaces.
  2. Identification of M&C interfaces inside the Receiver Node.
  3. A flow diagram of the "Monitor Information" from its origin in the Beamformers, Receiver Nodes, Master M&C, Calibration System, etc., through to the M&C Database and Science Archives.
  4. An outline of the main User Access paths to the Telescope Control, System Monitoring, and RTS Control/Monitoring

Principle Components and InterfacesFigure 1

Figure 1. Principal components of the Monitor and Control System are highlighted in yellow.

Receiver Node Interfaces

Figure 2

Figure 2. Principal components of Receiver node to be monitored and controlled by the M&C.

Data, Monitor, Calibration Info-Flow

Figure 3

Figure 3. Flow of information that is directly or indirectly relevant to the System Monitor Log and to the Calibration Log. Direct monitoring of the system hardware by the M&C system (temperatures, voltage and power levels within the tiles and receiver nodes) will be a small fraction of the monitor log.

Figure 4

Figure 4. The User/Operator will monitor three main access routes to the telescope: a standard telescope operations control screen, a monitor display screen with tools for manipulating and plotting the recorded information, and a screen and terminal access to the RTS computer.