Doppler Weather Radar - METNET - India Meteorological Department

B.1.9. Calibrations and health monitoring
1.9.1. Internal calibration
The system shall perform automatic internal calibration at least once every volume scan cycle
and display the current values.
Parameters are being calibrated -Linear receiver calibration
-phase calibration
-transmitter peak power
-system noise Figure
1.9.2. External Calibration
Provision is also been made for absolute external calibration using standard coherent source.
1.9.3. Sun Calibration and Pseudo tracking of Sun is provided
1.9.4. Management / Monitoring Utilities.
The system is having at least the following management / monitoring utilities:
1. Power up device for quick GO/ NO GO decision
2. Full- fledged diagnostics for radar signal processor.
3. Utility for system installation and configuration
4. Utilities to assist in overlay generation
5. Trigger timing calibration utility.
6. Utility for alignment of color displays.
B.1.10. Built In Test Equipment (BITE) Processor
1.10.1. A modern system making use of latest technology for continuous monitoring of the
operational status of functions and utilities of the radar system are incorporated in the said
system.
1.10.2. BITE Processor is measure and process a number of real time analog and digital
parameters in the radar system and accordingly generate and display an error message whenever
their value falls up/down then specified permissible range. BITE processor is continuously
monitoring input and output signals of every module/PCB for any deviation from the standard
value. Whenever any error message is generated, BITE Processor will also indicate failure of the
equipment, at the level of PCB and sub-module level. The BITE information will be available
online on any workstation as well as on radar system monitoring unit.
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