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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
2nd Notice:
Users of the IDD UNIWISC (aka MCIDAS) data feed:
We will be upgrading the Unidata-Wisconsin IDD data stream (IDD
feedtype UNIWISC (aka MCIDAS)) with products that use GOES-17 imagery in
replacement of GOES-15 imagery and with updated GOES-East and GOES-West
imagery products tomorrow, Wednesday, February 19, 2020.
Why:
NOAA has announced the cessation of GOES-15 operations on March 2,
so those products that currently use/incorporate GOES-15 imagery
will need to be replaced/updated. Here is a snippet from the NOAA
announcement describing the GOES-15 status change:
January 29, 2020
"GOES-15 supplemental operations to GOES-17 will be extended to March
2, 2020. After that date, the GOES-15 spacecraft will be placed
in standby. GOES-17 will continue operating in the GOES-West role at
137.2 degrees west with all instruments operating nominally."
A major implication of the cessation of GOES-15 operations is that
the GINI imagery that is currently being distributed by the NWS in
NOAAPort will no longer be available in NOAAPort or via an IDD feed.
When:
We are planning to add new/updated content to the UNIWISC data
stream starting on Wednesday, February 19, 2020. We will continue to
distribute UNIWISC content that contains/is based on GOES-15 imagery
for as long as GOES-15 remains operational.
Impacts of the changes being made to UNIWISC:
The volume of data available in the UNIWISC feed will increase from an
average of approximately 95 MB/hr to an average that is approximately
810 MB/hr, an 8.5-fold increase!
The new products that will be available in the revamped UNIWISC feed
are:
- full spatial and temporal resolutions for GOES-East (GOES-16) and
West (GOES-17) CONUS coverage for the 6.2um WV and 10.3um thermal
IR channels, and a reduced resolution for the 0.64um VIS channels
GOES-East/West 0.64um CONUS VIS imagery will have (nominal)
resolutions of 1.0km and the 6.2um WV and 10.3um thermal IR imagery
will have (nominal) resolutions of 2km.
GOES-East CONUS channels will be remapped into the same TANC
projection that is used for the national composite Level III
radar products that are distributed in the IDD FNEXRAD feed.
GOES-West CONUS channels will be distributed in the GOES-R fixed
grid projection.
GOES-East/West CONUS imagery will be available every 5 minutes
when the satellites are scanning in modes 3 or 6, and will not be
available when the satellites are operating in scanning mode 4.
- full spatial and temporal resolutions for all mesoscale image coverages
for the 0.64um VIS, 6.2um WV, and 10.3um thermal IR channels
The mesoscale images are small in size, but they are numerous since
the are available either every minute or every 30 seconds.
GOES-East/West mesoscale 0.64um VIS images have (nominal) resolutions
of 0.5km and the 6.2um WV and 10.3um thermal IR images have (nominal)
resolutions of 2km.
All mesoscale images are in the GOES-R fixed grid projection.
- full temporal and reduced spatial resolutions for GOES-East/West full
disk image coverages for the 0.64um VIS, 6.2um WV, and 10.3um thermal
IR channels
All full disk images will have (nominal) resolutions of 4km, and
will be available every 10 minutes when the satellite producing the
coverage is operating in scanning mode 6, every 15 minutes when the
satellite is operating in scanning mode 3, or every 5 minutes when
the satellite is operating in scanning mode 4.
All full disk images will be in the GOES-R fixed grid projection.
- GOES-East/West composite imagery for the 0.64um VIS, 6.2um WV,
and 10.3um thermal IR channels
The new East/West composite images will have (nominal) 4km resolutions
and will be available either every 10 minutes when GOES-East is
operating in scanning mode 6, every 15 minutes when GOES-East is
operating in scanning mode 3, or every 5 minutes when GOES-East is
operating in scanning mode 4.
All East/West composite images will be in the GOES-R fixed grid
projection centered on 105W longitude.
- GOES-East Level 2 products:
CAPE (CONUS coverage)
Cloud Top Pressure (CONUS coverage)
Lifted Index (CONUS coverage)
Total Precipitable Water (CONUS coverage)
Rain Rate QPE (full disk coverage)
Sea Surface Temperature (full disk coverage)
The update frequencies for these Level 2 products are dependent on the
product type. Please refer to the following web page details:
https://www.unidata.ucar.edu/data/uniwisc.html
All GOES-East Level 2 products will be in the GOES-R fixed grid
projection.
- the other products already in the UNIWISC feed remain unchanged:
Arctic multi-satellite composites (VIS, IRS, WV, IR, IRL)
Antarctic mult-satellite composites (VIS, IRS, WV, IR, IRL)
Global multi-satellite WV and IR composites in rectilinear projection
Global multi-satellite WV and IR composites in Mollweide projection
- sites wishing to use the new/revamped imagery that are being added to
the UNIWISC feed must insure that they REQUEST the new data in their
LDM configuration file REQUEST line(s), and update LDM pattern-action
file actions to correctly process the imagery
It is our observation that the most typical LDM configuration file
REQUEST being used is for everything from the UNIWISC feed. For example:
REQUEST UNIWISC ".*" <upsteam feed host>
No action is needed for sites using this type of REQUEST, but users
should be aware of the greatly increased data volumes that will result!
Sites that would like to tailor their UNIWISC REQUEST(s) are advised to
contact Unidata User Support <support-idd@xxxxxxxxxxxxxxxx> if they
need guidance.
- new processing action(s) will be need for the new imagery
The LDM/IDD Product IDs for the great majority of the products
in the revamped UNIWISC feed will change. The web page:
https://www.unidata.ucar.edu/data/uniwisc.html
contains detailed information on the image products that will be
available in the revamped UNIWISC feed with example LDM/IDD Product
IDs. This web page also has links to example LDM pattern-action file
actions needed to process the new/revamped and existing images.
For comparison, the web page:
https://www.unidata.ucar.edu/data/uniwisc_old.html
contains information on the products that have been distributed
in the UNIWISC feed for the past decade or so.
- all users are advised to update their display and analysis software
to the latest version(s) that is(are) available from Unidata
NB: this is especially true for GEMPAK users as only the most recent
release of Unidata GEMPAK contains support for the GOES-R fixed grid
projection that is used for the majority of the images in the
revamped feed.
Support
Please send any comments/questions/concerns to Unidata User support at:
support-idd@xxxxxxxxxxxxxxxx
Best regards,
Unidata User Support
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