Subject: GOES-13 (GOES-East) Imager IR Channel-4 Re-sampling to --bcaec502d86eb0cfa1050e5a81c6 Content-Type: text/plain; charset=UTF-8 *Topic:* GOES-13 (GOES-East) Imager IR Channel-4 Re-sampling to Match Channel-2 is Postponed to Monday, February 9th, 2015 *Date/Time Issued:* February 5, 2015, 1719 UTC *Product(s) or Data Impacted:* Improved fog products preventing twice-a-day product discontinuity. *Date/Time of Initial Impact:* February 9, 2015 1535 UTC *Date/Time of Expected End:* Permanent change *Length of Outage:* N/A *Details/Specifics of Change:* GOES-13 (GOES-East) IR Channels 2 (3.9 um) and 4 (10.7 um) registration difference was discovered to be 1 pixel or greater at certain times of day. This can cause false fog data when utilizing the difference between these two channels. A registration correction algorithm was developed into SPS v10.4.1 which can re-sample one channel towards the other to prevent any registration shift between these two channels. During the last few months the algorithm was used to shift Channel-2 one full pixel towards Channel-4, but only during that part of the day when the co-registration differences were measured to be at/near their largest values; this resulted in a discontinuity in the products twice a day (at the times when the Channel-2 one-pixel shift began and when it ended. To prevent this, Channel-4 will be re-sampled continuously to match Channel-2 registration by the SPS algorithm and still avoid any false fog data without causing any discontinuity in products. *Contact Information for Further Information: *ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 *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.ospo.noaa.gov/Operations/GOES/schedules.html for full GOES scanning schedules and scan sectors. See http://www.ospo.noaa.gov/Operations/GOES/documents.html for more specific information and related documents. See http://cimss.ssec.wisc.edu/goes/blog/archives/10341 for more details on the Imager co-registration. 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. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Reply Reply to all Forward --bcaec502d86eb0cfa1050e5a81c6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Topic:=C2=A0=C2=A0GOES-13 (GOES-East) Imager IR Channel-4 Re-samp= ling to Match Channel-2 is Postponed to Monday, = February 9th, 2015

Date/Time Issued:=C2=A0=C2=A0February=C2=A05, 2015= ,=C2=A0 1719=C2=A0UTC

Product(s) o= r Data Impacted:=C2=A0 Improved fog products preventing twice-a-day pro= duct discontinuity.

Date/Time of Initial Impact:=C2=A0 February 9, 2015=C2=A0 1535 UTC

<= b>Date/Time of Expected End:=C2=A0 Permanent change

Length of= Outage:=C2=A0 N/A

Details/Specifics of Change:=C2=A0=C2= =A0
GOES-13 (GOES-East) IR Channels 2 (3.9 um) and 4 (10.7 um) registrat= ion difference was discovered to be 1 pixel or greater at certain times of = day. This can cause false fog data when utilizing the difference between th= ese two channels. A registration correction algorithm was developed into SP= S v10.4.1 which can re-sample one channel towards the other to prevent any = registration shift between these two channels.=C2=A0During the last few months the algorithm was used to shift Chann= el-2 one full pixel towards Channel-4, but only during that part of the day= when the co-registration differences were measured to be at/near their lar= gest values; this resulted in a discontinuity in the products twice a day (= at the times when the Channel-2 one-pixel shift began and when it ended.=C2= =A0To prevent this, Channel-4 will= be re-sampled continuously to match Channel-2 registration by the SPS algo= rithm and still avoid any false fog data without causing any discontinuity = in products.


Contact Information for Further Informatio= n:=C2=A0=C2=A0ESPC Operations atESPCOperations@noaa.gov=C2=A0at=C2=A0301-817-3880<= br>
Web Site(s) for applicable information:
See=C2=A0http:/= /www.ssd.noaa.gov/PS/SATS/messages.html=C2=A0for this and other satelli= te related messages.
See=C2=A0http://www.ospo.noaa.gov/Operat= ions/GOES/schedules.html=C2=A0for full GOES scanning schedules and scan= sectors.
See=C2=A0http://www.ospo.noaa.gov/Operations/GOES/d= ocuments.html=C2=A0for more specific information and related documents.=
See=C2=A0http://cimss.ssec.wisc.edu/goes/blog/archives/10341= =C2=A0for more details on the Imager co-registration.

This message wa= s sent from ESPC.Notification@noaa.gov. You have been sent this and other not= ifications 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 busine= ss days to process your unsubscribe request.

<= div class=3D"h5">

=







<= br>




















= 







=
Reply
 Reply to all
3D""
Forward
=



--bcaec502d86eb0cfa1050e5a81c6--