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Service Change Notice 17-95
National Weather Service Headquarters Silver Spring, MD
1130 AM EDT Fri Aug 18 2017

To: Subscribers:
 -NOAA Weather Wire Service
 -Emergency Managers Weather Information Network
 -NOAAPORT
 Other NWS Partners and NWS Employees

From: Joseph Pica
 Director, NWS Office of Observations

Subject: NWS Test of Alternately-Mapped Geostationary
 Operational Environmental Satellite-16 (GOES-16)
 Imagery, effective September 6, 2017

On or after 15 UTC Wednesday, September 6, 2017, a new test of
GOES-16 Advanced Baseline Imager (ABI) Imagery will begin on the
Satellite Broadcast Network (SBN, also known as NOAAPORT). The
products to be evaluated under this test will be very similar to
the reprojected GOES-16 Sectorized Cloud and Moisture Imagery
(SCMI) already on the SBN, except that the test products will
not be reprojected (i.e., remapped) in the same way as most of
the SBN`s current SCMI. The test is to evaluate mapping the test
products to the ABI Fixed Grid, which is a projection based on
the viewing perspective of the idealized location of a satellite
in geostationary orbit.

The SBN feed of all GOES-16 products remains in a pre-
operational validation and testing phase. NOAA`s GOES-16
satellite has not been declared operational and its data are
preliminary and undergoing testing. Users receiving these data
through any dissemination means assume all risk related to their
use of GOES-16 data and NOAA disclaims any and all warranties,
whether express or implied, including (without limitation) any
implied warranties of merchantability or fitness for a
particular purpose. These products are being added to enable the
testing of networks and systems with actual GOES-16 data and so
that users will be able to evaluate the products during this
validation/test period.

It is not recommended that these preliminary products be used in
operational forecast processes. Any downstream postings of these
data should clearly convey their preliminary, non-operational
and in-testing nature. Furthermore, this data stream may be
subject to temporary unannounced data outages and modifications
during this validation and testing period.

GOES-16 will be moved from its current station near 89.2-89.5
degrees west longitude to the GOES-East position at 75.2 degrees
west longitude around November 2017, before it is declared
operational. Future Service Change Notices will provide further
information on the GOES-16 transition to operations and on
continuing product validation plans.

Refer to prior Service Change Notice 17-24 which introduced
GOES-16 SCMI to the SBN:

http://www.nws.noaa.gov/os/notification/scn17-24goes16.htm

This test will evaluate ABI SCMI on the ABI Fixed Grid because
its use will reduce unnecessary reprojection steps and product
sizes. Whereas most ABI SCMI on the SBN`s GOES-R East channel is
reprojected, the GOES-16 full disk imagery on that channel
already uses the fixed grid. If this test is successful, it is
anticipated that NOAA will transition all SBN SCMI products to
the ABI fixed grid during late calendar year 2017. The duration
of this fixed grid test is expected to be approximately 5 weeks,
with a tentative test end date of Wednesday, October 11, 2017.

The SBN`s GOES-R Series West channel (PID 107) will be used for
dissemination of the test data, even though the test data will
be from GOES-16, not GOES West.  For this test only, the WMO
headers for the GOES-16 fixed grid imagery will be as follows,
with references to the 11 character template:

Template: T1 T2 A1 A2 ii CCCC

 T1 = T
 T2 = I
 A1 = T for large-scale (non-mesoscale) sectors
    = U for mesoscale sectors
 A2   Where A1=T, for large-scale (non-mesoscale) sectors,
      A2 corresponds to geographical sectors as follows:
    = E for the East CONUS sector
    = P for the Puerto Rico Regional sector
    = S for the East Full Disk
      Where A1=U, for mesoscale sectors, A2 values corresponds
      to geographical latitude/longitude areas as follows:
    = A for 45 deg. N <= Lat. < 60 deg. N and
     120 deg. W < Long. <= 135 deg W
    = B for 45 deg. N <= Lat. < 60 deg. N and
     105 deg. W < Long. <= 120 deg. W
    = C for 45 deg. N <= Lat. < 60 deg. N and
     90 deg. W < Long. <= 105 deg. W
    = D for 45 deg. N <= Lat. < 60 deg. N and
     75 deg. W < Long. <=  90 deg. W
    = E for 45 deg. N <= Lat. < 60 deg. N and
     60 deg. W < Long. <=  75 deg. W
    = F for 30 deg. N <= Lat. < 45 deg. N and
     120 deg. W < Long. <= 135 deg. W
    = G for 30 deg. N <= Lat. < 45 deg. N and
     105 deg. W < Long. <= 120 deg. W
    = H for 30 deg. N <= Lat. < 45 deg. N and
     90 deg. W < Long. <= 105 deg. W
    = I for 30 deg. N <= Lat. < 45 deg. N and
     75 deg. W < Long. <=  90 deg. W
    = J for 30 deg. N <= Lat. < 45 deg. N and
     60 deg. W < Long. <=  75 deg. W
    = K for 15 deg. N <= Lat. < 30 deg. N and
     120 deg. W < Long. <= 135 deg. W
    = L for 15 deg. N <= Lat. < 30 deg. N and
     105 deg. W < Long. <= 120 deg. W
    = M for 15 deg. N <= Lat. < 30 deg. N and
     90 deg. W < Long. <= 105 deg. W
    = N for 15 deg. N <= Lat. < 30 deg. N and
     75 deg. W < Long. <=  90 deg. W
    = O for 15 deg. N <= Lat. < 30 deg. N and
     60 deg. W < Long. <=  75 deg. W
    = P for 0 deg. N <= Lat. < 15 deg. N and
     90 deg. W < Long. <= 135 deg. W
    = Q for 0 deg. N <= Lat. < 15 deg. N and
     60 deg. W < Long. <=  90 deg. W
    = R for 45 deg. N <= Lat. < 90 deg. N and
     135 deg. W < Long. <= 180 deg. W
    = S for 0 deg. N <= Lat. < 45 deg. N and
     135 deg. W < Long. <= 180 deg. W
    = T for 60 deg. N <= Lat. < 90 deg. N and
     90 deg. E < Long. <= 135 deg. W
    = U for 0 deg. N <= Lat. < 60 deg. N and
     90 deg. E < Long. <=  60 deg. W
    = V for 0 deg. N <= Lat. < 90 deg. N and
     180 deg. W < Long. <=  90 deg. E
    = W and X are reserved for future use
    = Y for 90 deg. S <= Lat. <  0 deg. S and
     105 deg. W < Long. <=  90 deg. E
    = Z for 90 deg. S <= Lat. <  0 deg. S and
     90 deg. E < Long. <= 105 deg. W

Where mesoscale boxes T, U and Z extend across the prime
meridian (0 deg. longitude) and boxes V and Y extend across the
International Dateline (180 deg. longitude).  Sector boundaries
of 0 deg. N or 0 deg. S refer to the equator.  The "<=" symbols
refer to "less than or equal to."  Note that some of the regions
above are out of range from GOES-16 at its current location, but
these regions could be within range after the satellites
station changes.

 ii = ABI channel number (01 - 16); between the ii and CCCC is
      a space

 CCCC = KNES (signifies products originated by NESDIS)

These unique WMO Headers and the unique SBN-channel assignments
will be used to differentiate this tests fixed grid GOES-16
SCMI from the SBNs pre-existing GOES-16 SCMI (the latter of
which is described in Service Change Notice 17-24, whose link
appears earlier in this notice).  Two additional features within
the test SCMI files will distinguish this tests fixed grid
SCMI.  The first feature will be the value of the global
metadata satellite_id parameter, whose value will be "GOES-17"
(even though this tests sensor data will be from GOES-16).  The
second feature will be the values of the global metadata
product_name parameter, whose values will begin with "G17_"
(e.g., G17_TCONUS and so on).

During this test and evaluation period, the set of available
fixed-grid sectors will change. For example, there will be no
mesoscale sectors if and when the GOES-16 ABI scans in mode 4
(a full disk mode).

Approximate hourly product counts and volumes for the GOES-16
fixed grid test stream are as follows:

ABI Sector      Hourly Count    Hourly Volume
----------      ------------    -------------
East CONUS192/hour      2592MBytes/hour
Puerto Rico 64/hour       192MBytes/hour
East Full Disk  64/hour       256Mbytes/hour
Mesoscale       1920/hour      1322Mbytes/hour

Product counts and volumes will vary due to ABI mode changes,
diurnal variations, file-compression variability, tiling and
other factors.

The file format for these products is netCDF4.

For information about the ABI Fixed Grid, please refer to the
GOES-R Product Definition and Users Guide:

http://www.goes-r.gov/users/docs/PUG-L1b-vol3.pdf

Additional information about the flow of GOES-16 products on the
SBN has been posted at the following website and will be
periodically updated:

http://www.nws.noaa.gov/noaaport/html/GOES_R.shtml

Critical weather or other factors could delay the activation of
these products on the SBN.

For questions pertaining to this change or upcoming plans for
the addition of GOES-16 products onto NOAAPORT, please contact:

    Brian Gockel
    NOAA/NWS Office of Observations
    Surface and Upper Air Division, Services Branch
    Silver Spring, MD 20910
    Email: Brian.Gockel@noaa.gov
 and
    AWIPS Network Control Facility (NCF) Help Desk
    NOAA/NWS Office of Central Processing
    Silver Spring, MD 20910
    Email: nws.ncf.supervisors@noaa.gov

For questions regarding the scientific or technical content of
the NOAAPORT-disseminated GOES-16 products please contact:

    Environmental Satellite Processing Center (ESPC) Help Desk
    Suitland, Maryland 20746
    Phone: 301-817-3880
    Email: ESPCOperations@noaa.gov

National Service Change Notices are online at:

http://www.weather.gov/os/notif.htm



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