Updates to Unidata IDD FNEXRAD and UNIWISC Datastream Products
Shortly after 0 UTC (18:00 MDT) on Saturday, March 21, 2014, the contents of the Internet Data Distribution FNEXRAD (NEXRAD Level III national composites) and UNIWISC (aka McIDAS Satellite Imagery Sectors) datastreams were updated with new products. Prior to the update, the FNEXRAD products were created on motherlode.ucar.edu and the UNIWISC products were created on unidata2.ssec.wisc.edu. Both datastreams are now being created in a 64-bit CentOS 6.5 Virtual Machine in the Amazon EC2 cloud.
The following is a brief overview of the contents of each datastream with special emphasis on new or altered products:
FNEXRAD - NEXRAD Level III composites
Product Res Cod Type Form Status --------+------+----+-------------------+------+---------------- National 1 km N0R base reflectivity GINI existing product National 2 km N1P 1-hour precip. GINI existing product National 4 km NTP storm total precip. GINI existing product National 6 km N0R base reflectivity GINI existing product National 10 km RCM base reflectivity GINI existing product National 1 km N0R base reflectivity GRIB2 existing product National 1 km DHR base reflectivity GINI ? new product National 1 km DVL dig. vert. liq H2O GINI ? new product National 1 km EET enhanced echo tops GINI ? new product National 1 km HHC hybrid hydro. class GINI ? new product
Notes:
- All products are updated every 5 minutes
- All GINI images are PNG compressed
- Additional information including sample displays, LDM/IDD Product IDs, and links to example LDM pattern-action file actions for these Level III composites can be found in: https://www.unidata.ucar.edu/data/radar.html#fnexrad
UNIWISC (aka MCIDAS) - Satellite Image Sectors
Product Res Form Status ----------------------------------------------+------+-----+----------------- GOES-East Visible 4 km PNGA existing product GOES-East Shortwave Infrared 4 km PNGA existing product GOES-East Water Vapor 4 km PNGA existing product GOES-East Thermal Infrared 4 km PNGA existing product GOES-East Longwave Infrared (CO2) 4 km PNGA existing product GOES-West Visible 4 km PNGA existing product GOES-West Shortware Infrared 4 km PNGA existing product GOES-West Water Vapor 4 km PNGA existing product GOES-West Thermal Infrared 4 km PNGA existing product GOES-West Longwave Infrared (CO2) 4 km PNGA existing product Antarctic Thermal Infrared composite 5 km PNGA existing product Manually digitized radar 10 km PNGA existing product Global Mollweide Water Vapor composite 30 km PNGA ? higher resolution Global Mollweide Thermal Infrared composite 30 km PNGA ? higher resolution GOES-East HiRes Visible 1 km PNGA ? new product GOES-East/West NH Visible composite 10 km PNGA ? new product GOES-East/West NH Shortwave Infrared composite 10 km PNGA ? new product GOES-East/West NH Water Vapor composite 10 km PNGA ? new product GOES-East/West NH Thermal Infrared composite 10 km PNGA ? new product GOES-East/West NH Longwave Infrared composite 10 km PNGA ? new product Arctic Visible composite 4 km PNGA ? new product Arctic Shortwave Infrared composite 4 km PNGA ? new product Arctic Water Vapor composite 4 km PNGA ? new product Arctic Thermal Infrared composite 4 km PNGA ? new product Arctic Longwave Infrared composite 4 km PNGA ? new product Antarctic Visible composite 5 km PNGA ? new product Antarctic Water Vapor composite 5 km PNGA ? new product Global Rectilinear Water Vapor composite 20 km PNGA ? new product Global Rectilinear Thermal Infrared composite 20 km PNGA ? new product
Notes:
- Update cycles vary by product
- All images are in a PNG-compressed McIDAS AREA format
- Global Mollweide WV and IR composites are now higher resolution and larger in size
- Additional information including sample displays, LDM/IDD Product IDs, and links to example LDM pattern-action file actions for these satellite image sectors can be found in: https://www.unidata.ucar.edu/data/datastream.html
Potential Impacts to End Users
The Global Mollweide composite products will be 4 times the size/double the resolution of the previous products. This may require updates to users' automated processing routines (e.g., IDV bundles, McIDAS BATCH/MCB files, shell scripts, etc.)
The exact wavelengths associated with several of the products have changed. If you are using LDM pattern-action file actions in the form suggested at the above link, you will not notice the change. Pattern-action file actions or other types of scripts that use more specific pattern-matching rules may need alteration.
Unidata-maintained servers (e.g., adde.ucar.edu, atm.ucar.edu, adde.ssec.wisc.edu, lead4.unidata.ucar.edu) use the following McIDAS ADDE dataset names:
Satellite Image Sectors:
RTIMAGES/ANTARCTICVIS Antarctic Visible composite RTIMAGES/ANTARCTICWV Antarctic Water Vapor composite RTIMAGES/ANTARCTICIR Antarctic Thermal Infrared composite RTIMAGES/ARCTIC-VIS Arctic Visible composite RTIMAGES/ARCTIC-IRS Arctic Shortwave Infrared composite RTIMAGES/ARCTIC-WV Arctic Water Vapor composite RTIMAGES/ARCTIC-IR Arctic Thermal Infrared composite RTIMAGES/ARCTIC-IRL Arctic Longwave Infrared composite RTIMAGES/GE-1KVIS GOES-East HiRes Visible RTIMAGES/GE-VIS GOES-East Visible RTIMAGES/GE-39 GOES-East Shortwave Infrared RTIMAGES/GE-WV GOES-East Water Vapor RTIMAGES/GE-IR GOES-East Thermal Infrared RTIMAGES/GE-CO2 GOES-East Longwave Infrared (CO2) RTIMAGES/GW-VIS GOES-West Visible RTIMAGES/GW-39 GOES-West Shortware Infrared RTIMAGES/GW-WV GOES-West Water Vapor RTIMAGES/GW-IR GOES-West Thermal Infrared RTIMAGES/GW-CO2 GOES-West Longwave Infrared (CO2) RTIMAGES/GEW-VIS GOES-East/West NH Visible composite RTIMAGES/GEW-39 GOES-East/West NH Shortwave Infrared composite RTIMAGES/GEW-WV GOES-East/West NH Water Vapor composite RTIMAGES/GEW-IR GOES-East/West NH Thermal Infrared composite RTIMAGES/GEW-CO2 GOES-East/West NH Longwave Infrared composite RTIMAGES/GLOBAL-WV Global Rectilinear Water Vapor composite RTIMAGES/GLOBAL-IR Global Rectilinear Thermal Infrared composite RTIMAGES/MOLL-WV Global Mollweide Water Vapor composite RTIMAGES/MOLL-IR Global Mollweide Thermal Infrared composite RTIMAGES/MDR Manually digitized radar
Note: The following Satellite Image Sectors have new names. The old names will continue to work, but the new names are preferred:
Old name: RTIMAGES/ANTARCTIC New name: RTIMAGES/ANTARCTICIR Old name: GLOBAL/WVCOMP New name: RTIMAGES/GLOBAL-WV Old name: GLOBAL/IRCOMP New name: RTIMAGES/GLOBAL-IR Old name: GLOBAL/MOLL-WV New name: RTIMAGES/MOLL-WV Old name: GLOBAL/MOLL-IR New name: RTIMAGES/MOLL-IR
NEXRAD Level III National Composites:
NEXRCOMP/1KN0R-NAT 1 km N0R US Base Reflectivity Composite NEXRCOMP/2KN1P-NAT 2 km N1P US 1-hr Precip. Composite NEXRCOMP/4KNTP-NAT 4 km NTP US Storm Total Precip. Composite NEXRCOMP/6KN0R-NAT 6 km N0R National Base Reflectivity Composite NEXRCOMP/10KRCM-NAT 10 km RCM National Composite Radar NEXRCOMP/1KDHR-NAT 1 km DHR US Digital Hybrid Reflectivity Composite NEXRCOMP/1KDVL-NAT 1 km DVL US Digital Vert. Int. Liquid H2O Composite NEXRCOMP/1KEET-NAT 1 km EET US Enhanced Echo Tops Composite NEXRCOMP/1KHHC-NAT 1 km HHC US Hybrid Hydrometeor Class. Composite
Notes:
For the GLOBAL/WVCOMP (new name: RTIMAGES/GLOBAL-WV) and GLOBAL/IRCOMP (new name: RTIMAGES/GLOBAL-IR) composite images served by the Unidata-operated ADDE server
adde.ucar.edu:- The resolution has been reduced by a factor of about five. (Images now have roughly 20 km resolution versus 4-5 km resolution previously.)
- The band number referenced in the global images has changed from 1 to either 3 (water vapor) or 4 (thermal infrared).
These changes may cause existing IDV bundles to misbehave. Opening the old bundles, re-selecting the data sources, and re-saving the bundles should solve the problems.
- GOES calibration has been applied to the composite images. Within the bounds covered by the GOES-E and GOES-W images, the applied calibration should be correct. Outside the bounds covered by the GOES-E and GOES-W images, temperature calibration information should be interpreted as being approximate.
Please send any questions or comments to Unidata Datastream Support
Add new comment