Doppler Weather Radar - METNET - India Meteorological Department

D.2.4. Advantages of Present IMD DWR Scan strategy
1. Overlapping at the lower elevation scan to give a better derived product of Rainfall and
low level wind shear.
2. Closer to VCP21 of NexRad Network, used to detect shallow precipitation It has ten
elevation cuts enabling to perform scan within ten minutes.
3. Cone of silence minimized and less sparse to that of VCP21.
4. High temporal & spatial cover at lower levels – tracing widespread system better.
5. Suitable for generating a mosaic product (especially precipitation) if another radar is
present within 200 – 400 km.
Figure D.8. Cone of Silence 50.0 km around the radar center
Figure D.9. Scan implemented in most of the IMD DWRs
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