Subject: Administrative: Status of GOES-16 ABI L1b and CMI data, --94eb2c0a4c840282ff0553ba1a33 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Topic: Status of GOES-16 ABI L1b and CMI Data Date/Time Issued: July 7, 2017 1320 UTC Product(s) or Data Impacted: GOES-16 ABI L1b and CMI data Date/Time of Initial Impact: July 10, 2017 at 1200 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. Several remaining means of GOES-16 distribution will be activated the week of July 10-14, including additional PDA subscriptions, HRIT/EMWIN, and GEONETCast-Americas (GNC-A). Specific dates and times for data distribution through these means will be provided via separate ESPC notifications. 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.goes-r.gov/spacesegment/abi.html 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. --=20 ---------------------------------------------------------------------------= ---- Kathryn W. Mozer GOES-R User Services Coordinator GOES-R Product Readiness and Operations (PRO) Team NOAA/NESDIS/OSPO/SPSD GSFC: Building 6, S240 kathryn.mozer@noaa.gov Office: 301-286-3647 --94eb2c0a4c840282ff0553ba1a33 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Topic: = Status of GOES-16 ABI L1b and CMI Data


Date/Time Issued: July 7, = 2017 1320 UTC


Product(s) or Data Impacted: GOES-16 ABI L1b and CMI data

=

Date/Time of Initial I= mpact: July 10, 2017 at 1200 UTC<= /span>


=

Date/Time of Expected En= d: =C2=A0N/A

Leng= th of Event: =C2=A0N/A


Details/Specifics of Change: The GOES-R Peer Stakeholder - Prod= uct 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 L= 1b and CMI data are at Provisional Validation Maturity as of June 1, 2017.= =C2=A0Several remaining means of GOES-16 distribution will be activated the= week of=C2=A0July 10-14, including ad= ditional PDA subscriptions, HRIT/EMWIN, and GEONETCast-Americas (GNC-A).=C2= =A0 Specific dates and times for data distribution through these means will= be provided via separate ESPC notifications.


The ABI L1b data pro= ducts 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 engin= eering data. The CMI data products are reflectances for bands 1-6 and brigh= tness temperatures for bands 7-16.=C2=A0

<= font face=3D"arial, helvetica, sans-serif">

Provisional validation me= ans:

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Validation activities are continuing and t= he 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 an= alysis. 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 occ= urring.

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0Product performance has bee= n demonstrated through analysis of a small number of independent measuremen= ts obtained from select locations, periods, and associated ground truth or = field campaign efforts.

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0Product analysi= s is sufficient to establish product performance relative to expectations (= performance baseline).

= =C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0Documentation of p= roduct performance exists that includes recommended remediation strategies = for all anomalies and weaknesses. Any algorithm changes associated with sev= ere anomalies have been documented, implemented, and tested.<= /p>

Users= of the GOES-16 ABI L1B data bear responsibility for inspecting the data an= d understanding the known caveats 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= =A0Navigation may have errors up to 4 km.

2.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0B= and-to-band co-registration errors may be up to 8 km. Larger errors occur b= etween 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 features = to =E2=80=9Cjump=E2=80=9D in animation.

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

5.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Band 2 radianc= es are about 7% brighter than comparable polar satellite observations.

<= font face=3D"arial, helvetica, sans-serif">6.=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0The 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.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0Stray light exists for Visible and Near IR (VNIR) bands approx= imately one hour before and after satellite local midnight during the eclip= se 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 st= ray light effects during the same time frames.

8.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The V= NIR band radiometric calibration may cause frequent but minor discontinuiti= es in radiance values following each solar calibration.


<= p class=3D"MsoNormal">For CMI, = all the caveats noted above for the radiances are valid, in addition to the= following:

1.=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The maximum reflectance value is curre= ntly 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 surroundi= ng hot spots.

3.=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The multiband files do not have the= correct downscaling method listed in the metadata.

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 reflectance factors.

5.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= There 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 different from the other bands by 0.1 seconds.

Advisory on Use o= f GOES-16 Data

While the GOES-16 ABI L1b and CMI data have reache= d provisional validation, the data from GOES-16 are=C2=A0still=C2=A0considered prelim= inary and are undergoing validation testing. NOAA is therefore requesting t= hat any organizations that redistribute GOES-16 data -- before it is declar= ed operational -- include the following disclaimer with the data:

"NOAA's GOES-16 satellite has not been declared operational an= d its data are preliminary and undergoing testing."

Users r= eceiving these data through any dissemination means (including, but not lim= ited to, PDA, GeoNetcast Americas, HRIT/EMWIN, =C2=A0and 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 limitat= ion) any implied warranties of merchantability or fitness for a particular = purpose.

It is expected that GOES-16 data will be declared operation= al, approximately 6-12 months after launch, which occurred in November 2016= .


Conta= ct Information for Further Information: Kathryn Mozer at=C2=A0Kathryn.Mozer@noaa.gov. =C2=A0
=
We= b Site(s) for applicable information: See=C2=A0http://www.ssd.noaa.gov/PS/SATS/messages.html=C2=A0for th= is and other satellite related messages. See=C2=A0http://www.goes-r.gov/spacesegment/abi.html=C2=A0for ABI= specific information.

This message was sent from= =C2=A0ESPC.Notification@noaa.gov. You hav= e been sent this and other notifications because you have opted in to recei= ve it. If for any reason, you wish to unsubscribe, please contact ESPC Help= Desk at=C2=A0ESPCOperations@noaa.gov=C2=A0o= r=C2=A0(301) 817-3880. Please n= ote: it may take up to two business days to process your unsubscribe reques= t.
--
-----------------------------------------------------------------= --------------
Kathryn W.= Mozer=C2=A0
GOES-= R User Services Coordinator=C2=A0
GOES-R Product Readiness and Operations (PRO) Team
<= div>NOAA/NESDIS/OSPO/SPSD
GSFC: Building 6, S240
kathry= n.mozer@noaa.gov
Office:=C2=A0301-286-3647
--94eb2c0a4c840282ff0553ba1a33--