Product Improvement and Development
Hillger, Campbell, Combs, Dostalek
An upgrade to current GOES software being used by the Satellite
Operations Control Center (SOCC) and by the ARAD RAMSDIS was made to fix
1) a long-existing problem causing the SOCC RAMSDIS to crash on occasion,
and 2) a non-functioning option in one of the programs delivered last year
to the ARAD RAMSDIS. Both problems were fixed remotely from CIRA
and new software was sent via FTP.
The RAMM Team suggested that the GINI (GOES Ingest NOAA-port
Interface) water vapor (WV) channel as used on the AWIPS return to the
standard bi-linear Look Up Table (LUT) traditionally used by McIDAS and
RAMSDIS. The main problem with the present GINI LUT is that temperatures
are truncated if they extend outside of the range from -10 to -60 deg C.
We strongly oppose the fact that those measurements are not available to
AWIPS users for any present or future image product development.
Also, the AWIPS product generator, which works on 8-bit counts, cannot
generate meaningful image products using the WV channel because the count
to temperature conversion is not identical for all the GOES IR channels
(the WV channel being the exception). Supporting evidence for this
decision is available on the Web at the following two addresses.
The first one explains the GINI LUT issue, http://www.cira.colostate.edu/RAMM/cal_val/wvgini.htm;
the second gives the reasons for our decision to support a full return
to the bi-linear LUT used by McIDAS/RAMSDIS and by AWIPS for the other
GOES IR channels http://www.cira.colostate.edu/RAMM/cal_val/wvprop.htm
Programs for producing albedo images were modified to work
on McIDAS-X and were then made available to the NWS Western Region offices
for further testing. The programs generate albedo images from the
GOES visible channel or combinations of GOES channels. The albedo
images are corrected for solar zenith angle variations to enhance portions
of the image that are normally very dark. The day/night albedo combines
the visible channel during the day with the shortwave albedo calculated
from GOES IR channels 2 and 4 at night.
Software for smoothing McIDAS-format satellite area files
has been made available to Kevin Schrab at NWS Western Region Headquarters.
The program is used to slightly smooth and produce a more pleasing display
of GOES Sounder water vapor channel-12 (6.5 µm) being ingested into
AWIPS. This Sounder channel typically has a low signal-to-noise ratio
and appears quite noisy without smoothing. Smoothing is used for
this channel on the Sounder RAMSDIS at the CIRA.
Software for clustering GOES fields-of-view has been modified
to work on McIDAS-X and forwarded to CIMSS for testing. The conversion
to McIDAS-X was accomplished by modifying existing software to work on
both McIDAS and McIDAS-X without having special software that only works
on either system alone.
Several new products generated from GOES Imager and Sounder
channels have been added to RAMSDIS Online, including loops of experimental
albedo and skin temperature products from the GOES Imagers, and some experimental
combined-channel products from the GOES Sounder (GOES-east only).
Advanced Microwave Sounding Unit (AMSU)
data will be added in the near future. The web site includes information
on how the various products are generated. Site is at http://www.cira.colostate.edu/ramm/rmsdsol/ROLEX.html
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