Subject: Administrative: GOES-16 ABI L1b and CMI data in HRIT/EMWIN, --94eb2c13b348dcddf20553bb4a4c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Topic: GOES-16 ABI L1b and CMI Data in HRIT/EMWIN Date/Time Issued: July 7, 2017 1445 UTC Product(s) or Data Impacted: GOES-16 ABI L1b and CMI data in HRIT EMWIN Date/Time of Initial Impact: July 10, 2017 at 1700 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. HRIT/EMWIN will be activated and distribute ABI Full Disk in bands 2, 7, 8, 9, 13, 14 and 15 with 2 km spatial resolution every 30 minutes coupled with ABI mesoscale images in bands 2, 7 and 13 every 15 minutes at exactly 1700 UTC on July 10th. The HRIT/EMWIN signal will be on GOES-16 located at 89.5 degrees West. The frequency is 1694.1 MHz. The data rate is 400 Kbps. The modulation is BPSK. The polarization is linear with vertical offset. 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/users/hrit.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. --94eb2c13b348dcddf20553bb4a4c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

T= opic: GOES-16 ABI L1b and CMI Data in HRIT/EMWIN


Date/Time Issued: July 7, 2017 1445 UTC


Product(s) or Data Impacted: GOES-16 ABI L1b a= nd CMI data in HRIT EMWIN


Date/Time of Initial Impact: July 10, 2017 at 1700 UTC


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


Length of Event: = =C2=A0N/A


Details/Specifics of Change: The GOES-R Peer S= takeholder - Product Validation Review for ABI L1b and CMI Provisional Matu= rity was held on June 1, 2017. As a result of this review, NOAA has confirm= ed that the ABI L1b and CMI data are at Provisional Validation Maturity as = of June 1, 2017. HRIT/EMWIN will be activated and distribute=C2=A0ABI Full = Disk in bands 2, 7, 8, 9, 13, 14 and 15 with 2 km spatial resolution every = 30 minutes coupled with ABI mesoscale images in bands 2, 7 and 13 every 15 = minutes at exactly 1700 UTC on July 10th. The=C2=A0HRIT/EMWIN sig= nal will be on GOES-16 located at 89.5 degrees West. The frequency is 1694.= 1 MHz. The data rate is 400 Kbps. The modulation is BPSK. The polarization = is linear with vertical offset.=C2=A0


The ABI L1b data products are calibrated and geo-located r= adiances of the 16 ABI bands over the Full Disk (FD) of the Earth, the Cont= inental United States (CONUS) region, the Mesoscale (MESO) regions, and cer= tain instrument calibration and engineering data. The CMI data products are= reflectances for bands 1-6 and brightness temperatures for bands 7-16.=C2= =A0


Provisional validation means:

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Validation activities are continuing an= d 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 al= gorithm 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=A0<= /span>Incremental product improvements may stil= l be occurring.

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Product performance has been demonstrated through analysis= of a small number of independent measurements obtained from select locatio= ns, periods, and associated ground truth or field campaign efforts.<= /font>

=C2=B7=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0Produc= t analysis is sufficient to establish product performance relative to expec= tations (performance baseline).

=C2=B7=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Documentation of product performance exists = that includes recommended remediation strategies for all anomalies and weak= nesses. Any algorithm changes associated with severe anomalies have been do= cumented, implemented, and tested.

= Users of the GOES-16 ABI L1B da= ta bear responsibility for inspecting the data and 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 i= n development and testing:

1.=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0Navigation may have errors up to 4 km.

<= p class=3D"gmail-m_-4639613280098245237gmail-m_-2417859113228339793gmail-m_= 2361844741740659991gmail-m_8274756669798023262gmail-m_7875195798502979871gm= ail-MsoListParagraphCxSpMiddle">2.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Band-to-band co-regis= tration errors may be up to 8 km. Larger errors occur between bands from th= e three groups of bands (1-6, 7-11, and 12-16 =E2=80=93 they are in three d= ifferent 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 striping may occur ac= ross all 16 bands.

5.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0Band 2 radiances are about 7% brighter than comparable polar sate= llite observations.

6.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0The infrared (IR) radiance measurements for ABI Scan Mode 3 CO= NUS and MESO observations demonstrate an artificial periodicity of 15 minut= es. 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 la= rger 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 a= nd Near IR (VNIR) bands approximately one hour before and after satellite l= ocal midnight during the eclipse season before the vernal (spring) equinox = and after the autumnal (fall) equinox, and may exist in other days of the y= ear. Total duration of impact is approximately twenty days twice per year. = Band 7 experiences residual stray light effects during the same time frames= .

8.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The VNIR b= and radiometric calibration may cause frequent but minor discontinuities in= radiance values following each solar calibration.


For CMI, all th= e caveats noted above for the radiances are valid, in addition to the follo= wing:

1.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The m= aximum reflectance value is currently capped at 1.0 which causes dark patch= es 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 multiband files do not have the correct downscaling method listed in t= he metadata.

4.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0The kappa0 value reported in the product is inconsistent with the correc= t kappa0 value applied to the reflectance factors.

5.= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0There are inconsistent data qual= ity 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 b= and 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 ha= ve reached provisional validation, the data from GOES-16 are=C2=A0still=C2=A0considered preliminary and = are undergoing validation testing. NOAA is therefore requesting that any or= ganizations that redistribute GOES-16 data -- before it is declared operati= onal -- include the following disclaimer with the data:


"NOAA's GOES-16 satellite has n= ot been declared operational and its data are preliminary and undergoing te= sting."

Users receiving these data through any disseminatio= n means (including, but not limited to, PDA, GeoNetcast Americas, HRIT/EMWI= N, =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 impl= ied, including (without limitation) any implied warranties of merchantabili= ty 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 I= nformation for Further Information: Kathryn Mozer at=C2=A0Kathryn.Mozer@noaa.gov= . =C2=A0

Web Site(s) for applicable information: See=C2=A0http://www.ssd.= noaa.gov/PS/SATS/messages.html=C2=A0for this and other satellite r= elated messages. See=C2=A0http://www.goes-r.gov/users/hrit.html=C2=A0for= ABI specific information.

This message was sent from=C2=A0ESPC.Notification@noaa.go<= wbr>v. 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=C2=A0ESPCOperations@noaa.gov=C2=A0or=C2=A0(301) 817-3880. Please note: it may take up to two business days to p= rocess your unsubscribe request.

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