Subject: Administrative: GOES-16 ABI CMI data in GEONETCast-Americas, --94eb2c12f780ff56920553bb4ac0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Topic: GOES-16 ABI CMI Data in GNC-A Date/Time Issued: July 7, 2017 1445 UTC Product(s) or Data Impacted: GOES-16 ABI CMI data in GNC-A Date/Time of Initial Impact: July 10, 2017 at 1400 UTC Date/Time of Expected End: N/A Length of Event: N/A Details/Specifics of Change: The GOES-R Peer Stakeholder - Product Validation Review for ABI L1b and CMI Provisional Maturity was held on June 1, 2017. As a result of this review, NOAA has confirmed that the ABI L1b and CMI data are at Provisional Validation Maturity as of June 1, 2017. The following data will be broadcast through GEONETCast-Americas (GNC-A) on July 10th at 1400 UTC: CMI Band 2 (0.64um) with 1 km resolution CMI Band 7 (3.9um) with 2 km resolution CMI Band 8 (6.2um) with 2 km resolution CMI Band 9 (6.9um) with 2 km resolution CMI Band 13 (10.3um) with 2 km resolution CMI Band 14 (11.2um) with 2 km resolution CMI Band 15 (12.3um) with 2 km resolution The ABI L1b data products are calibrated and geo-located radiances of the 16 ABI bands over the Full Disk (FD) of the Earth, the Continental United States (CONUS) region, the Mesoscale (MESO) regions, and certain instrument calibration and engineering data. The CMI data products are reflectances for bands 1-6 and brightness temperatures for bands 7-16. Provisional validation means: =C2=B7 Validation activities are continuing and the general research community is encouraged to participate. =C2=B7 Severe algorithm anomalies are identified and under analysis. Solutions to anomalies are in development and testing. =C2=B7 Incremental product improvements may still be occurring. =C2=B7 Product performance has been demonstrated through analysis of= a small number of independent measurements obtained from select locations, periods, and associated ground truth or field campaign efforts. =C2=B7 Product analysis is sufficient to establish product performan= ce relative to expectations (performance baseline). =C2=B7 Documentation of product performance exists that includes recommended remediation strategies for all anomalies and weaknesses. Any algorithm changes associated with severe anomalies have been documented, implemented, and tested. Users of the GOES-16 ABI L1B data bear responsibility for inspecting the data and understanding the known caveats prior to use. Below is the list of caveats that have been identified and are under analysis. Solutions are in development and testing: 1. Navigation may have errors up to 4 km. 2. Band-to-band co-registration errors may be up to 8 km. Larger errors occur between bands from the three groups of bands (1-6, 7-11, and 12-16 =E2=80=93 they are in three different focal plane assemblies [FPA]). 3. Frame-to-frame registration may be unstable, causing features to =E2=80=9Cjump=E2=80=9D in animation. 4. Image striping may occur across all 16 bands. 5. Band 2 radiances are about 7% brighter than comparable polar satellite observations. 6. The infrared (IR) radiance measurements for ABI Scan Mode 3 CONUS and MESO observations demonstrate an artificial periodicity of 15 minutes. The amplitude is uniformly small in terms of radiance but can exceed 1 K in terms of brightness temperature for cold scenes. This effect may be larger during some times of day as well as some bands. 7. Stray light exists for Visible and Near IR (VNIR) bands approximately one hour before and after satellite local midnight during the eclipse season before the vernal (spring) equinox and after the autumnal (fall) equinox, and may exist in other days of the year. Total duration of impact is approximately twenty days twice per year. Band 7 experiences residual stray light effects during the same time frames. 8. The VNIR band radiometric calibration may cause frequent but minor discontinuities in radiance values following each solar calibration. For CMI, all the caveats noted above for the radiances are valid, in addition to the following: 1. The maximum reflectance value is currently capped at 1.0 which causes dark patches within high reflectance scenes. 2. There may be artificially cold pixels surrounding hot spots. 3. The multiband files do not have the correct downscaling method listed in the metadata. 4. The kappa0 value reported in the product is inconsistent with the correct kappa0 value applied to the reflectance factors. 5. There are inconsistent data quality flag (DQF) values for off-Earth pixels. 6. On occasion, the start time of a single band file is different from the other bands by 0.1 seconds. *Advisory on Use of GOES-16 Data* While the GOES-16 ABI L1b and CMI data have reached provisional validation, the data from GOES-16 are still considered preliminary and are undergoing validation testing. NOAA is therefore requesting that any organizations that redistribute GOES-16 data -- before it is declared operational -- include the following disclaimer with the data: *"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 (including, but not limited to, PDA, GeoNetcast Americas, HRIT/EMWIN, and GOES Rebroadcast) 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. It is expected that GOES-16 data will be declared operational, approximately 6-12 months after launch, which occurred in November 2016. Contact Information for Further Information: Kathryn Mozer at Kathryn.Mozer@noaa.gov. Web Site(s) for applicable information: See http://www.ssd.noaa.gov/PS /SATS/messages.html for this and other satellite related messages. See http://www.geonetcastamericas.noaa.gov/ for ABI specific information. This message was sent from ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request. --94eb2c12f780ff56920553bb4ac0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Topic: GOES-16 ABI CMI Data in GNC-A


=

Date/= Time Issued: July 7, 2017 1445 UTC


Product(s) or Data Impacted: GOES-16 ABI CMI data= in GNC-A


Date/Time of Initial Impact: July 10, 2017 at 1400 UTC


Date/Time of Expected End: =C2=A0N/A

<= p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><= span style=3D"background-color:transparent;vertical-align:baseline;white-sp= ace:pre-wrap">

Length of E= vent: =C2=A0N/A


Details/Specifics of Change: The GOES-R = Peer Stakeholder - Product Validation Review for ABI L1b and CMI Provisiona= l Maturity was held on June 1, 2017. As a result of this review, NOAA has c= onfirmed that the ABI L1b and CMI data are at Provisional Validation Maturi= ty as of June 1, 2017.=C2=A0 The following data will be broadcast through= =C2=A0GEONETCast-Americas (GNC-A) on July 10th at 1400 UTC:

= CMI Band 2 (0.64um) with 1 km resolution
CMI Band 7 (3.9um) with = 2 km resolution
CMI Band 8 (6.2um) with =C2=A02 km resolution
CMI Band 9 (6.9um) with 2 km resolution
CMI Band 13 (10.3u= m) with 2 km resolution
CMI Band 14 (11.2um) with 2 km resolution=
CMI Band 15 (12.3um) with 2 km resolution


The ABI L1b data products are calibrated and= geo-located radiances of the 16 ABI bands over the Full Disk (FD) of the E= arth, the Continental United States (CONUS) region, the Mesoscale (MESO) re= gions, and certain instrument calibration and engineering data. The CMI dat= a products are reflectances for bands 1-6 and brightness temperatures for b= ands 7-16.=C2=A0


Provisional validation means:

=C2=B7<= span style=3D"font-variant-numeric:normal;font-stretch:normal;line-height:n= ormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Validation activities are continuing and the general = research community is encouraged to participate.

=C2=B7= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Severe algorithm anomalies are identified and under = analysis. Solutions to anomalies are in development and testing.

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Incremental product improvements may = still be occurring.

=C2=B7=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0Produc= t performance has been demonstrated through analysis of a small number of i= ndependent measurements obtained from select locations, periods, and associ= ated ground truth or field campaign efforts.

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Product analysis is sufficient to establish product perfo= rmance relative to expectations (performance baseline).

= =C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Documentation of product performance exists th= at includes recommended remediation strategies for all anomalies and weakne= sses. Any algorithm changes associated with severe anomalies have been docu= mented, implemented, and tested.

Users of the GOES-16 ABI L1B data= bear responsibility for inspecting the data and understanding the known ca= veats prior to use.=C2=A0 Below is the list of caveats that have been identified and are under analysis. Solutions are in = development and testing:

1.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Navigat= ion may have errors up to 4 km.

2.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Band-t= o-band co-registration errors may be up to 8 km. Larger errors occur betwee= n bands from the three groups of bands (1-6, 7-11, and 12-16 =E2=80=93 they= are in three different focal plane assemblies [FPA]).

3.=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0Frame-to-frame registration may be unstable, causing fea= tures to =E2=80=9Cjump=E2=80=9D in animation.

4.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0Image striping may occur across all 16 bands.

5.=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0Band 2 radiances are about 7% brighter than comparable p= olar satellite observations.

6.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The infra= red (IR) radiance measurements for ABI Scan Mode 3 CONUS and MESO observati= ons demonstrate an artificial periodicity of 15 minutes. The amplitude is u= niformly small in terms of radiance but can exceed 1 K in terms of brightne= ss temperature for cold scenes. This effect may be larger during some times= of day as well as some bands.

7.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Stray l= ight exists for Visible and Near IR (VNIR) bands approximately one hour bef= ore and after satellite local midnight during the eclipse season before the= vernal (spring) equinox and after the autumnal (fall) equinox, and may exi= st in other days of the year. Total duration of impact is approximately twe= nty days twice per year. Band 7 experiences residual stray light effects du= ring the same time frames.

8.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The VNIR band= radiometric calibration may cause frequent but minor discontinuities in ra= diance values following each solar calibration.


For CMI, all the= caveats noted above for the radiances are valid, in addition to the follow= ing:

1.= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The maximum reflectance value is= currently capped at 1.0 which causes dark patches within high reflectance = scenes.

2.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0There may be artificially cold= pixels surrounding hot spots.

3.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The mul= tiband files do not have the correct downscaling method listed in the metad= ata.

4.= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The kappa0 value reported in the= product is inconsistent with the correct kappa0 value applied to the refle= ctance factors.

= 5.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0There are inconsistent= data quality flag (DQF) values for off-Earth pixels.

6.=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0On occasion, the start time of a single band file is differ= ent from the other bands by 0.1 seconds.

<= b>Advisory on Use of GOES-16= Data

While the GOES-16 ABI L1b and CMI data have reached provisi= onal validation, the data from GOES-16 are=C2=A0still=C2=A0considered preliminary and are undergoing val= idation testing. NOAA is therefore requesting that any organizations that r= edistribute GOES-16 data -- before it is declared operational -- include th= e following disclaimer with the data:


"NOAA&#= 39;s GOES-16 satellite has not been declared operational and its data are p= reliminary and undergoing testing."

Users receiving these d= ata through any dissemination means (including, but not limited to, PDA, Ge= oNetcast Americas, HRIT/EMWIN, =C2=A0and GOES Rebroadcast) assume all risk = related to their use of GOES-16 data and NOAA disclaims any and all warrant= ies, whether express or implied, including (without limitation) any implied= warranties of merchantability or fitness for a particular purpose.

= It is expected that GOES-16 data will be declared operational, approximatel= y 6-12 months after launch, which occurred in November 2016.<= /p>


Contact I= nformation for Further Information: Kathryn Mozer at=C2=A0Kathryn.Mozer@noaa.gov. =C2=A0

Web Site(s) for applicable inform= ation: See=C2=A0http:= //www.ssd.noaa.gov/PS/SATS/messages.html=C2=A0for this and other s= atellite related messages. See=C2=A0http://www.geonetcastamericas.noaa.gov/=C2=A0for ABI specific = information.

T= his message was sent from=C2=A0ES= PC.Notification@noaa.gov. You have been sent this and other notifi= cations because you have opted in to receive it. If for any reason, you wis= h to unsubscribe, please contact ESPC Help Desk at=C2=A0ESPCOperations@noaa.gov=C2=A0or=C2=A0(301) 817-3880. Please note:= it may take up to two business days to process your unsubscribe request.
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