Gilbert, > I got the below from NOAA last week. They are adding a new NOAAport > channel (see the announcement below my .sig for details). Thus, as of > early next month, for those of you who use the LDM NOAAport ingester with > version 6.11.0 (current version), you'll need to have this in your > ldmd.conf: > > # dvbs shared memory ingest processes > exec "dvbs_multicast -n -m 188.8.131.52" > exec "dvbs_multicast -n -m 184.108.40.206" > exec "dvbs_multicast -n -m 220.127.116.11" > exec "dvbs_multicast -n -m 18.104.22.168" > exec "dvbs_multicast -n -m 22.214.171.124" <-----this is new > > # readnoaaport shared memory readers > exec "readnoaaport -m 126.96.36.199" > exec "readnoaaport -m 188.8.131.52" > exec "readnoaaport -m 184.108.40.206" > exec "readnoaaport -m 220.127.116.11" > exec "readnoaaport -m 18.104.22.168" <-----this is new > > Anyway, read on for the tech message, if you haven't seen it yet. > When I updated our LDM on the NOAAport ingester this afternoon, I added > the two entries above to my ldmd.conf. Thanks for sending this in! I'll see about putting it in the next release. > Gilbert > > ******************************************************************************* > Gilbert Sebenste ******** > (My opinions only!) ****** > Staff Meteorologist, Northern Illinois University **** > E-mail: address@hidden *** > web: http://weather.admin.niu.edu ** > Twitter: http://www.twitter.com/NIU_Weather ** > Facebook: http://www.facebook.com/niu.weather * > ******************************************************************************* > > Technical Implementation Notice 12-45 > National Weather Service Headquarters Washington DC > 1236 PM EDT Fri Sep 21 2012 > > To: Subscribers: > -Family of Services > -NOAA Weather Wire Service > -Emergency Managers Weather Information Network > -NOAAPORT > Other NWS Partners, Users and Employees > > From: Timothy McClung > Chief, Science Plans Branch > Office of Science and Technology > > Subject: Addition of Alaska Region NPP VIIRS Imagery to NOAAPORT > Test Channel Effective October 2, 2012 > > On or about Tuesday, October 2, 2012, beginning approximately > 1500 Coordinated Universal Time (UTC), high resolution imagery > from the Suomi National Polar-Orbiting Partnership (NPP) > satellite will be broadcast across the NOAAPORT satellite > broadcast network. This addition will consist of a limited set of > NPP Visible Infrared Imaging Radiometer Suite (VIIRS) imagery > covering the Alaska region. The imagery stream will be provided > by the NOAA National Environmental Satellite, Data, and > Information Service (NESDIS) NPP Data Exploitation (NDE) system, > based on NPP VIIRS imagery Environmental Data Records (EDRs). > > The new NPP VIIRS imagery products will be transmitted across a > test channel of the NOAAPORT satellite broadcast network. > > -Digital Video Broadcast (DVB) packet identifier: 105 > -Multicast address: 22.214.171.124 > -Port number: 1205 > -SBN Data Stream field setting in their frame-level headers: 7 > > NWS anticipates this NOAAPORT channel will be populated with > additional polar-orbiting satellite imagery. For clarity, this > channel will be referred to as the POLARSAT. > > The Alaska region NPP VIIRS imagery will, in general, be within > the following latitude-longitude box: > > Lower/Southern Latitude: 45 degrees North > Upper/Northern Latitude: 75 degrees North > Left/Western Longitude: 120 degrees East > Right/Eastern Longitude: 120 degrees West > > This initial set of imagery products will be based on three NPP > VIIRS I channels, the horizontal resolution of which, at nadir, > is approximately 375 meters. > > The imagery products will be formatted in netCDF4, but compressed > via gzip. Like all NOAAPORT products, each file will have a plain > text WMO heading at its start. These headings are listed below. > > TIPB01 KNES - Imagery Channel 1 (0.64?m) > TIPB04 KNES - Imagery Channel 4 (3.74?m) > TIPB05 KNES - Imagery Channel 5 (11.45?m) > > The "P" in the third character place of the WMO Heading > distinguishes this NPP-VIIRS imagery from pre-existing NOAAPORT > satellite imagery. > > To access these products, users should take the following steps: > > -Read beyond or strip off the WMO heading > -Decompress the resulting product, e.g., via gunzip > -Use a netCDF4 reader, e.g., a decoder that invokes the Unidata > netCDF4 software package > > Each product will consist of one granule of VIIRS imagery for a > single channel. The VIIRS granules will cover approximately > 86 seconds of data, roughly 5 degrees or 556 kilometers of along- > track geographical extent. > > Unlike existing NOAAPORT satellite imagery, formatted on > prescribed maps, each NPP VIIRS imagery granule will be uniquely > located. Geolocation information is contained in each product > file. The geolocation information consists of three > 1541-dimension arrays of latitude/longitude pairs that correspond > to the granule edge (first column), granule centerline, and > granule edge (last column), with all three arrays oriented along > the satellite track. > > Given the fixed resolution and gridded Ground Track Mercator > representation of the VIIRS imagery, only these three columns of > geographical information (latitudes and longitudes) are required > to map the imagery. This reduced geolocation information can be > interpreted based on the VIIRS Ground Track Mercator imagery > algorithm (fine 375 meter resolution version) for accurate > georeferencing. Related information (though not specific to the > NOAAPORT stream of NPP VIIRS imagery) can be found in the > following document: "Joint Polar Satellite System (JPSS) > Operational Algorithm Description (OAD) Document for VIIRS Ground > Track Mercator (GTM) Imagery Environmental Data Record (EDR) > Software," Revision A, January 18, 2012, (e.g., section 2.0.4). > > The NOAAPORT feed of NPP VIIRS imagery is provided across a test > channel of the satellite broadcast network. This NOAAPORT channel > is under test and evaluation. Product availability across this > channel is nonetheless expected to approach or meet that of > operational/baseline data (i.e., greater than 95% data > availability). If the experimental period is successful, NWS > intends to transition this NOAAPORT stream to full operational > posture in early 2013. > > For questions regarding the scientific or technical content of > the NOAAPORT NPP VIIRS imagery feed please contact: > > ESPC Help Desk > Suitland, Maryland 20746 > Phone: 301-817-3880 > Email: address@hidden > > For questions regarding the NOAAPORT activation or distribution > of these data sets please contact: > > Brian Gockel > NOAA/NWS Office of Science and Technology > Phone: 301-713-0304 x158 > Email: address@hidden > > NWS Technical Implementation Notices are online at: > > http://www.nws.noaa.gov/om/notif.htm > > $$ > > > ? > > _______________________________________________ > noaaport mailing list > address@hidden > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ Regards, Steve Emmerson Ticket Details =================== Ticket ID: GCG-487425 Department: Support NOAAPORT Priority: Normal Status: Closed
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