Subject: Administrative: Invalid SNPP CrIS SDR Radiances Expected This is a multi-part message in MIME format. --------------030107060609090509030401 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Topic: Invalid SNPP CrIS SDR Radiances Expected on 10/20/2013 Date/Time Issued: October 17 2013 1635 UTC Product(s) or Data Affected: Data outage for SNPP CrIS products SVL 10255 to SVL 10257 Date/Time of Initial Effect: 20th Oct, 2013 05:03:11 UTC Date/Time of Expected End: Approximately 20th Oct, 2013 10:00:00 UTC Duration: 04 hrs 57 min Details: Due to a time stamp error in the CrIS SDR code, both the AFWA and NESDIS IDPS are expected to generate invalid CrIS SDRs for approximately 101 minutes on 10/20/2013, starting at 05:03:11 GMT (observation time). Due to some uncertainty surrounding the duration of the event, real time data analysis will be completed to ensure that the anomaly has ceased and SDR radiances have returned to expected values after ~06:44:00 GMT. As an additional precaution, CrIS SDR processing will be stopped, memory cleared and restarted at approximately 10:00 GMT. This forced restart is not expected to impact data products. It should be noted that while the radiance values will be in error, SDR quality flags will indicate that these data are 'valid'. Further, these radiance errors will propagate into the downstream CrIS IR Ozone IPs and CrIMSS EDRs. For past events of this nature, radiance anomalies were not observed in offline software, and therefore impacts to direct broadcast users is not anticipated. However, any issues should be reported to the SNPP Mission Manager at Neil.r.Wyse@nasa.gov. Breakdown of Events: 10/20/2013 at 05:03:11 GMT - anomaly event triggered. Note these data will be processed after Svalbard contact 10256 (AOS 06:18 GMT). 10/20/2013 at approximately 06:43:00 GMT - anomaly is expected to cease. Note these data will be processed after Svalbard contact 10257 (AOS 07:58 GMT). Real time data analysis will be completed to verify that data is valid. 10/20/2013 at approximately 10:00 GMT - CrIS SDR processing will be stopped, memory cleared, and CrIS SDR processing resumed. Satellite/Systems Affected: SNPP/AFWA and NESDIS IDPS PRO */Martin England, /**/Ph.D/**//* /SNPP/JPSS Engineering Team Lead/ /NOAA/NESDIS/OSPO Mission Ops Division/ */Physical Address:/*/NSOF 1578; 4231 Suitland Road; Suitland, MD 20746/ */Mailing Address:/*/1315 East West Highway; Silver Spring, MD 20910-3282/ /Phone(Office): (301) 817 - 4292/ /Phone (Mobile): (301) 704 - 0551 aka Batphone/ /Fax: (301) 817 - 7901/ --------------030107060609090509030401 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
Topic: Invalid SNPP CrIS
SDR Radiances Expected on 10/20/2013
to generate invalid CrIS SDRs for
approximately
101 minutes on 10/20/2013, starting at
05:03:11 GMT (observation time). Due to some
uncertainty surrounding the duration of the
event, real time data analysis will be
completed to ensure that the anomaly has ceased and
SDR radiances have returned to expected values
after ~06:44:00 GMT. As an additional
precaution, CrIS SDR processing will be
stopped, memory cleared and restarted at
approximately 10:00 GMT. This forced
restart is
not expected to impact data products.
It should be noted that while the radiance
values will be in error, SDR quality flags
will indicate that these data are
‘valid’.
Further, these radiance errors will propagate
into the downstream CrIS IR Ozone IPs and
CrIMSS EDRs.
For past events of this nature, radiance
anomalies were not observed in offline software,
and therefore impacts to direct broadcast
users
is not anticipated. However, any issues
should be reported to the SNPP Mission Manager
at Neil.r.Wyse@nasa.gov.
Breakdown of Events:
10/20/2013 at 05:03:11 GMT - anomaly event
triggered. Note these data will be processed
after Svalbard contact 10256 (AOS 06:18
GMT).
10/20/2013 at approximately 06:43:00 GMT -
anomaly is expected to cease. Note these data
will be processed after Svalbard contact 10257
(AOS 07:58 GMT). Real time data analysis
will be completed to verify that data
is valid.
10/20/2013 at approximately 10:00 GMT - CrIS
SDR processing will be stopped, memory cleared,
and CrIS SDR processing
resumed.
Satellite/Systems Affected: SNPP/AFWA and
NESDIS IDPS PRO
Martin England,
Ph.D
SNPP/JPSS
Engineering Team Lead
NOAA/NESDIS/OSPO
Mission Ops Division
Physical
Address: NSOF
1578; 4231
Suitland Road; Suitland, MD 20746
Mailing
Address: 1315 East West
Highway; Silver Spring, MD
20910-3282
Phone(Office):
(301) 817 - 4292
Phone (Mobile):
(301) 704 - 0551 aka Batphone
Fax:
(301) 817
- 7901