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20010721: only compositing radars in precipo mode (GEMPAK)
- Subject: 20010721: only compositing radars in precipo mode (GEMPAK)
- Date: Sat, 21 Jul 2001 19:03:07 -0600
>From: Robert Mullenax <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200107212301.f6LN10128202
>I would like to composite only radards in precip mode using gdradr.
>I can easily get a list of radars and their modes with McIDAS
>using imglist, and could write a script that could pull them
>from that list and edit a GEMPAK nexrad table..but before
>I reinvent the wheel is there a way with gempak to tell gdradr
>(or to create a list that gdradr will use) to only composite
>stations in precip mode? I don't see any way off hand.
>
>Thanks,
>Robert Mullenax
>
Robert,
If a radar is in precip, or storm mode, you will see the N0S & NTP products
(eg no storm relative winds or total precip if the radar is in clear air).
You can quickly generate a nexrad.tbl file for stations which have a N0S
within a certain time period. A quick string compare of
file names would show files whose times are greater than a given file name.
Some radar sites do not switch to precip mode (especially in winter)
when there are valid and interesting reflectivity values. For example,
here most snow storms are observed in clear air mode.
Steve Chiswell
