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[Staging #GCG-487425]: New satellite imagery requiring changes to ldmd.conf


> 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"
> exec    "dvbs_multicast -n -m"
> exec    "dvbs_multicast -n -m"
> exec    "dvbs_multicast -n -m"
> exec    "dvbs_multicast -n -m"  <-----this is new
> # readnoaaport shared memory readers
> exec    "readnoaaport -m"
> exec    "readnoaaport -m"
> exec    "readnoaaport -m"
> exec    "readnoaaport -m"
> exec    "readnoaaport -m"  <-----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
> 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:
> -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
> $$
> ?
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Steve Emmerson

Ticket Details
Ticket ID: GCG-487425
Department: Support NOAAPORT
Priority: Normal
Status: Closed

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