Subject: Product Outage/Anomaly: UPDATE #4: N19 HIRS Noise, Issued: This is a multi-part message in MIME format. --------------020304010209020700010503 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit *Update #4* (final notification): Following the recommendation of the instrument vendor the N19 HIRS instrument was commanded on July 10. The HIRS Filter Wheel Motor mode was changed from normal to high mode (providing more torque) and filter housing heater (to free lubrication) was activated. The instrument is operating nominally at this time and there are no known alternatives to adjusting user processing systems. OSPO Engineers do not plan to make any changes to the configuration of the instrument in the near future. *Update #3:* Engineers are still working on the problem. The instrument vendor was tasked to analyze the data and recommend a path forward. An updated list of product impacts is provided in this notification (pulled "TOAST (Total Ozone Analysis using SBUV/2 and TOVS)" as is not using N19 HIRS/4 into the operational processing). *Update #2:* Impacted product list has been updated (pulled "MSPPS Scene Products"). The investigation into the NOAA-19 HIRS data degradation is continuing. *Update #1:* Length of Anomaly and Detail/Specifics (Product list Updated) *Topic:* NOAA-19 High Resolution Infrared Radiation Sounder (HIRS/4) Noise in Channels 1-12 *Date/Time Issued:* July 17, 2013 1318 UTC * **Product(s) or Data Impacted: * See Details Section Below. *Date/Time of Initial Impact:* July 2, 2013 *Date/Time of Expected End:* Unknown *Length of Anomaly: *9 days *Details/Specifics:* The investigation into the NOAA-19 HIRS data degradation is continuing. NOAA-19 High Resolution Infrared Radiation Sounder (HIRS/4) Channels 1-12 began experiencing a significant increase in noise on July 2, 2013. As a result of the noise, the following products may be degraded: Level 1 Granules - HIRS/4 Level 1b - HIRS/4 Level 1b* - HIRS/4 ATOVS (Advanced TIROS Operational Vertical Sounder) is producing the N19 level2 products in a degraded mode with minimal impact. AVHRR GAC Longwave Histograms AVHRR GAC OLR HIRS Outgoing Longwave Radiation (OLR) - Some degradation was observed (possible impacts are being evaluated). POES Ingestor Polar AIRS Radiaiton Budget Seasonal Mean Radiation Budget Absorbed Solar Radiation Variance Radiation Budget Annual Mean SPP Gateway (DAPE Gateway) Contact Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880 Web Site(s) for applicable information: http://www.star.nesdis.noaa.gov/icvs/N19/ipm_telemetry_n19_hirx.php This message was sent by 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. --------------020304010209020700010503 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Update #4 (final notification): Following the recommendation of the instrument vendor the N19 HIRS instrument was commanded on July 10. The HIRS Filter Wheel Motor mode was changed from normal to high mode (providing more torque) and filter housing heater (to free lubrication) was activated.   The instrument is operating nominally at this time and there are no known alternatives to adjusting user processing systems. OSPO Engineers do not plan to make any changes to the configuration of the instrument in the near future.

Update #3: Engineers are still working on the problem.  The instrument vendor was tasked to analyze the data and recommend a path forward.  An updated list of product impacts is provided in this notification (pulled "TOAST (Total Ozone Analysis using SBUV/2 and TOVS)" as is not using N19 HIRS/4 into the operational processing).

Update #2: Impacted product list has been updated (pulled "MSPPS Scene Products"). The investigation into the NOAA-19 HIRS data degradation is continuing.

Update #1: Length of Anomaly and Detail/Specifics (Product list Updated)

Topic: NOAA-19 High Resolution Infrared Radiation Sounder (HIRS/4) Noise in Channels 1-12

Date/Time Issued:  July 17, 2013 1318 UTC

Product(s) or Data Impacted:  See Details Section Below.

Date/Time of Initial Impact:  July 2, 2013

Date/Time of Expected End:  Unknown

Length of Anomaly: 9 days

Details/Specifics:  The investigation into the NOAA-19 HIRS data degradation is continuing.

NOAA-19 High Resolution Infrared Radiation Sounder (HIRS/4) Channels 1-12 began experiencing a significant increase in noise on July 2, 2013.  As a result of the noise, the following products may be degraded:

Level 1 Granules - HIRS/4
Level 1b - HIRS/4
Level 1b* - HIRS/4
ATOVS (Advanced TIROS Operational Vertical Sounder) is producing the N19 level2 products in a degraded mode with minimal impact.
AVHRR GAC Longwave Histograms
AVHRR GAC OLR
HIRS Outgoing Longwave Radiation (OLR) - Some degradation was observed (possible impacts are being evaluated).
POES Ingestor
Polar AIRS
Radiaiton Budget Seasonal Mean
Radiation Budget Absorbed Solar Radiation Variance
Radiation Budget Annual Mean
SPP Gateway (DAPE Gateway)

Contact Information:  ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880

Web Site(s) for applicable information: http://www.star.nesdis.noaa.gov/icvs/N19/ipm_telemetry_n19_hirx.php

This message was sent by 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.


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