Hi Elmer,
re:
> So, there is no BREF that decodes to McIDAS area file? That needs to be
> our output, since it is used as input data by several other applications.
The 1 km N0R (aka BREF) image you are currently grabbing is in GINI format
(after being uncompressed by pngg2gini). The 2 km N1P (PRE1, 1-hour precip)
and 4 km NTP (PRET, precip total) products are also in PNG-compressed
GINI format.
The FNEXRAD feed also has a 6 km N0R composite (BREF) in PNG-compressed AREA
format:
Example FNEXRAD header:
pnga2area Q5 RL 300 RADAR BREF 6km 20070802 1219
It also has the several radar composites -- including the national
1 km N0R composite -- in GRIB format:
Example FNEXRAD headers:
radar_mosaic_national !grib/unidata/UPC_1/#255/200708021223/F000/N0R/sfc! 000000
radar_mosaic_national !grib/unidata/UPC_1/#255/200708021223/F000/NET/sfc! 000001
radar_mosaic_nathr !grib2/unidata/UPC_255/#000/200708021223F000/N0R/0 - NONE!
000000
If you are licensed to use McIDAS from SSEC, you have a couple of options:
1) a) create an ADDE dataset of the 1 km N0R composites
b) create an ADDE dataset whose contents are AREA files as input/output
c) do an IMGCOPY from the GINI dataset to the AREA dataset; McIDAS will
transparently do the conversion from GINI to AREA for you
2) grab a bundle of XCD decoders we make available. This bundle contains a
McIDAS routine called GRIBDEC which converts a field in GRIB1 format to
McIDAS AREA. This is the routine that we use to create the 6 km AREA product
in the FNEXRAD feed; it can just as easily create an AREA from the
1 km N0R GRIB message in the FNEXRAD feed to a McIDAS AREA
Cheers,
Tom
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Ticket Details
===================
Ticket ID: XGX-360555
Department: Support ldm-mcidas
Priority: Normal
Status: Closed
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