GEOS-5

Talk:GEOS-5 ADAS Radiance Monitoring

Revision as of 07:22, 12 December 2014 by Wrmccart (talk | contribs)

Please add notes to this section, including anything noteworthy to radiance monitoring, using the + sign above. Examples below show the header (i.e. NPP Launched) and the comment below. It is helpful if you include the date in your comment, following the format: 

*'''DD Month Year''' - Now my comments

so that there is a timestamp beyond the page history.

Observing System Notes

  • 01 November 2011 - This page was generated

NPP Launched

  • 28 October 2011 - NPP was successfully launched.

Test Comment

  • 1 November 2011 - This is a test message.

Aqua AMSU-A change starting 18z Sep 21 2011

  • 3 November 2011 - There was a change in the bias correction and number of radiances accepted for Aqua AMSU-A toward the end of September 2011. A closer check showed the bias correction adjusted starting at 18z Sep 21 2011. The mean (O-F) and (O-A) increased to -0.2K and normalized cost also increased. In the ana.log files after that point, it shows we are reading AMSU-A data from both the 'airsbufr' and 'eosamsuabufr' files while prior to that date there was no AMSU-A data read in from the 'airsbufr' file. We found that AMSU-A data is now written in the 'airsbufr' file; this change in input is likely related to the change in statistics. Operations staff have been alerted and they are currently investigating.
  • 3 November 2011 - Update - our upstream provider had applied an update to their processing package back in September which added the AMSU-A data to the AIRS data file. OPS configuration is being modified not to try to read AMSU-A from the AIRS data file, and we have also asked our data provider to revert to our prior configuration.
  • 7 November 2011 - It looks like the statistics (bias correction and o-f mean) have moved back toward their previous values.

N15 outage 11/29/11

  • 29 November 2011 - Noted a dropout of N15 data on 11/29/11 - pertinent message here:

NOAA-15 Gyroless Baseline On-Orbit Test

Aqua AIRS and AMSU-A data dropoff 28 Nov - 1 Dec

  • 2 December 2011 - There were problems with data starting on 28 Nov due to a problem with communications from the Norway ground station.

Subject: Re: AIRS NRT data gaps starting from 11/29/2011........
From: "Budala, Sandeep S. (GSFC-610.2)[Affiliate]" <sandeep.s.budala@nasa.gov>
Date: Tue, 29 Nov 2011 16:07:37 -0600

Hello All,

Be advised the communication lines between GSFC and Norway were severed yesterday at @ 332/11:43:17GMT due to a undersea cable anomaly. The Aqua spacecraft are currently utilizing on-board automation to continue to playback the science data at Norway and utilizing other ground stations to capture the X-Band (science) data. Due to the data not able to be transmitted from Svalbard, Norway there will be an impact to science data latency to end users. The missions are at a higher than normal risk for incurring a data loss due to this anomaly.

Thanks!

Sandeep

GOES-15 replaces GOES-11 as operational satellite

NOAA-17 HIRS3

  • 12 Dec 2011 - Per Ron Gelaro's email - NCEP staff noted an increase in noise from NOAA-17 HIRS. The change is noticable on the monitoring change as a sudden change in mean and std. deviation of O-F, and a dropoff in the number of accepted obs, starting with the 00UTC analysis on 4 December. We are following NCEPs lead in turning off N17 HIRS, effective as of 12UTC Dec 12 (today). The active_channels.tbl in the GEOS tag is being modifed to reflect turning off data from this satellite effective 00UTC Dec 4. The NCEP GSI and NAM turn off N17 HIRS as of 18UTC on Dec 13.

From the SSD message: On December 3, 2011 (DOY 337) at 21:25Z, there was an increase in the NOAA-17 HIRS filter motor current and temperature. The motor current increased approximately 20mA to 170mA and later dropped back towards its previous level. There was a few tenths of one degree increase in filterwheel temperature. This anomaly, considered as a sign of aging of the HIRS filter motor, mainly affects the HIRS longwave channels. These channels have escalated but stable noise levels.

  • 28 Jan 2013 NOAA-17 HIRS Outgas Test several orbits of lunar view Space Look data will be collected surrounding an extended duration outgas. The associated data outages will not impact GEOS-5 since N17 HIRS3 is no longer used.

COSMIC FM2 GPS RO

  • 5 Jan 2012 - Though I haven't found anything explicitly mentioning the permanent demise of COSMIC FM2, it does agree with GFS Monitoring that observations ceased at at 12 UTC cycle on 28 Dec 2011. These things sometimes come back to the data stream, but usually quicker it happens quicker than this. FM6 seems to be erratically dropping out, but was actually somewhat healthy in most recent cycles.
  • 23 Jan 2012 - FM2 data has still not returned.
  • 1 Mar 2012 - it appears that the COSMIC FM2 data has reappeared as of 12UTC 8 Feb 2012, mainly in upper levels.
  • 14 Mar 2012 - Now COSMIC FM4 has been out of the picture for a while - since around 1 March
  • 20 Mar 2012 - COSMIC FM4 is back
  • 9 Aug 2012 - note that COSMIC FM2 dropped out since late July. COSMIC FM4 is back after an outage in early July though.
  • 14 Aug 2012 - COSMIC FM2 back for a few days now. FM4 is spotty. C/NOFS missing since around 8 August, back on 16 August.
  • 09 Dec 2014 - COSMIC GPS update - Last COSMIC FM2 data seen on 2014-10-16. COSMIC FM4 missing since 2014-11-26. Last data dates are consistent with dates shown on recent occultation maps on COSMIC site.

WindSat Outage

  • 23 Jan 2012 - There has not been any WindSat data assimilated in our system since around 1/11/2012. If you check out NRL's WindSat page (http://www.nrl.navy.mil/WindSat/) it does look like observations from the outage period have been taken. WM is investigating further.
  • 6 Feb 2012 - There is a new format for distributing WindSat data and that "can be or not", according to Dennis Keyser from EMC, the cause of the outage. They are planning to do transition from 1.9.6 to 2.6.x format soon and they don't plan to process missing data. (DM)
  • March 15, 2012 - Data counts at NCEP back to normal. According to Dennis Keyser problem was that in the raw files was missing model wind speed and for that reason data were tossed.(DM)
  • 9 Aug 2012 - No WindSat data assimilated since 8/4/12 18z. From earlier correspondence: 'through email from Tom Lee at NRL...confirmed by Kim Richardson at NRL that WINDSAT processing will be discontinued this August due to lack of O&M funding.'
  • 16 Aug 2012 - Dennis Keyser suggests that the old 1.9.6 processing at NRL is discontinued and NCEP needs to update to the new 2.x.y format to restore the WindSat data flow

GOES-13 sounder SW bands noise

A NESDIS message mentions increased noise and striping on products in the shortwave bands (channels 13-16). Current OPS is not using G-13 radiance data, we will need to keep aware of this if we decide (as NCEP has) to assimilate the data in the new system.

MetOp-B launch

GOES-13 Outage

  • 24 Sept 2012 GOES-13 Imager and Sounder are suffering from increased noise. As a result, the platform has as of this day been pulled out of GOES-East operations. GOES-14 is being prepped to take over GOES-East ops. The Engineers continue to investigate, a return to service timeframe, if possible, is unknown. [1]
  • 16 Oct 2012 Tests of GOES-13 instrumentation have demonstrated the imager and sounder are ready to return to GOES-East operational service. GOES-13 Imager data are nominal and thanks to outgassing activities the noise in GOES-13 Sounder shortwave data has been reduced compared to pre-anomaly levels. The return of GOES-13 to operational service also optimizes the long term continuity of the GOES constellation. On October 18, 2012 at 1444 UTC GOES-13 data will be inserted back into the GOES-13 GVAR data stream, replacing the current GOES-14 data stream. Users do not need to repoint their antennas as the switch of GVAR data streams will be transparent. Users will notice the immediate shift of Earth coverage from the current GOES-14 drifting position to the GOES-13 position at 75 degrees West longitude. GOES-East products will be generated using GOES-13 and will receive nominal 24x7 monitoring. [2]
  • 18 Oct 2012 Additional information: GOES-13 returned to service as GOES-East today, Thursday, October 18 at 10:44 AM EDT. All operations are nominal. The root cause of the GOES-13 anomaly was a motor vibration in the sounder filter wheel subsystem that was transmitted on to the imager and sounder optical bench. Mitigating steps have been taken to suppress the vibration and in addition, outgassing of the sounder has improved the sounder detector performance. [3]
  • 12 Jun 2013 GOES-13 stopped producing imaging and sounding data at 0340 UTC May 22 2013 due to an anomaly believed to be a micrometeoroid strike on the arm for the solar array panel. GOES-15 initially provided additional coverage of eastern US, followed by activation of GOES-14 during the outage while engineers analyzed the cause of the anomaly. GOES-13 returned to service at 1545 UTC June 10 2013. SSD message NOAA press release NOAA press release

NOAA-18 SBUV outage

  • 13 Dec 2012 At approximately 08:05 UTC, December 12, 2012, NOAA-18 SBUV Chopper Motor stalled resulting in a sudden increase in current and temperature. This anomaly occurred December 12, 2012 , rendering the SBUV instrument inoperable. Engineering is working on the problem but does not expect any improvements in the near term. NESDIS message

Meteosat-10 replaces Meteosat-9 as operational satellite

scheduled to take place 21 Jan 2013 at 09:45 UTC EUMETSAT web page

  • 22 January 2013 - The changeover has taken place. Met9 winds stop and Met10 winds start with the 1/21 12UTC 'prepbufr' and 'satwnd' files and likewise for SEVIRI radiances in the 'sevcsr' file.

NOAA-17 decommissioning

  • 8 Feb 2013 from the NCEP RFC_MEMO_20130208: "The NESDIS Office of Satellite Products and Operations (OSPO), is in the process of briefing NESDIS management and the National Weather Service Headquarters on a proposal to terminate NOAA-17 from operations due to problems with the spacecraft. No formal notification will be made until the recommendation and supporting rational have been briefed to these groups, and decommissioning of NOAA-17 is approved. At this time, the proposed date to decommission NOAA-17 is March 18, 2013."
  • 3 Apr 2013 update on date of NOAA-17 decommissioning - 10 April 2013
  • 11 Apr 2013 from SATOPS Morning Report: Wednesday, April 10, 2013 - "At 12:17z Engineers successfully decommissioned NOAA 17. Operations included: turning off all transmitters, disconnecting batteries, opening thruster valves to deplete nitrogen, and off pointing the solar array from the Sun."

MetOp-B replaces MetOp-A as EUMETSAT's prime operational polar orbiting satellite

  • 24 Apr 2013 On 24 April 2013 at 12:00UTC EUMETSAT will transition operational services from MetOp-A to MetOp-B. MetOp-A data will continue to NOAA on a best effort basis and with out the timeliness benefits of half orbit dumps at McMurdo. NESDIS message [EUMETSAT press release www.eumetsat.int/Home/Main/News/Press_Releases/832312?l=en]

NOAA-19 HIRS degraded, disabled

  • O-F standard deviations were seen to rise, and an RFC memo circa 3 Jul 2013 stated that NCEP had turned the instrument off. As of the 12z run on 5 Jul, the observations were disabled in forward processing & FPIT. The spike in the radiance monitoring plots is likely due to the software being confused regarding used/rejected data when they switch to passive.

NOAA-15 AMSU-A data dropoff

  • 22 Aug 2013 NOAA-15 AMSU-A data counts and coverage decreased (first signs ~16 Aug 18UTC) with loss of data spreading southward from the Arctic. Per email from Nigel Atkinson (UK Met Office) this was due to erratic reporting of the A1-2 antenna position for the warm calibration view. The Warm Target View Position Tolerance for NOAA-15 AMSU-A was updated on 21 August 2013 at 1248 UTC, followed by a subsequent recovery of data counts and coverage.

Meteosat 10 SEVIRI decontamination 14-21 Jan 2014

Scheduled Decontamination of Meteosat-10 SEVIRI Instrument 14-21 Jan 2014. During the period Meteosat 9 image data will replace the primary Meteosat-10 service. The EUMETSAT winds are from Meteosat 9, starting from 12UTC 14 Jan 2014, and there is no SEVIRI radiance data. The SEVIRI data returns in the 06z files on 21 Jan. The 06z BUFR files also contain winds from both Meteosat 9 and 10, with Meteosat 10 wind data only in subsequent files.

AQUA AIRS outage

  • 25 Mar 2014 NESDIS message ESPC received an email from NASA reporting that the AIRS Instrument has encountered an anomaly as of March 22, 2014 17:27 UTC. ESPC is still not receiving Aqua Airs data. AIRS NRT data will not be available until further notice. From the airs.jpl website: "On March 22, the AIRS instrument experienced an anomaly related to one of the active cryocoolers used to cool the infrared detectors. We have temporarily disabled data production as we evaluate the cause of the anomaly and the corrective action."
  • Data returned in the 29 March 2014 00 UTC bufr file.

NOAA-16 decommissioning

  • 10 June 2014 NOAA-16 was decommissioned on June 9, 2014 at 14:23 UTC due to major spacecraft anomaly.The last fully successful contact of NOAA-16 was on 6 June at 00:55UTC. NESDIS bulletin

MetOp-A AMSU-A Ch 8 turned off

  • 29 August 2014 AMSU-A Channel 8 has deteriorated over time, and was shut off in fp as of 30 Aug at 00 UTC

NOAA-15 AMSU-A Ch 6 turned off

  • 17 Octover @014 Channel 6 on N15 has degraded and was turned off in FP effective 18 October 2014 at 00 UTC. In MERRA-2, it was turned off effective 1 Sept 2014.

GOES-15 increasing obs error and O-A & O-F since late Sep 2014

  • 19 Nov 2014 There are increasing mean O-A and O-F values as well as observation errors for GEOS-15 SNDR-D1 channels 3-8, SNDR-D3 channel 8, and SNDR-D4 channel 8. These abnormal values occur after the GEOS-15 Yaw Flip Maneuver between September 23-24, 2014. Here is the note about the maneuver http://www.ssd.noaa.gov/PS/SATS/SPBULL/MSG2651634.01.txt.
  • 9 Dec 2014 Still keeping an eye on this issue. New scan mirror emissivity coefficients for GOES-15 Sounder were to have been installed December 4. According to the announcement: "Upon this changeover users can expect to see small improvement in accuracy of the GOES-15 (GOES-West) Sounder calibrated radiances, most noticeably on channel 8 (11 um band)."

SSMIS F19 data improperly sneaking in as F17

  • 10-11 Dec 2014 There was a noted degradation in all stats for F17 in this period. Email correspondence from NRL (Ben R. & Steve S.) and FNMOC indicated that F19 data improperly slipped in to the F17 slot. It appears to have been corrected on ECMWF's page, but as of writing (AM on Fri 12 Dec), obs2html hasn't passed the point of correction.


Brief outages

GOES-15 outage 21-23 Mar 2012

  • 22 Mar 2012 - GOES-15 outage starting March 21, 2012, 2045 UTC. See announcement on NESDIS SSD page GOES-15 went into a sun acquisition mode and is unable to do any imaging. This does not impact radiance assimilation since we do not currently use GOES-15 but it will impact the satellite-derived cloud-motion wind vector data.

Update - the problem has been isolated; estimated return to service NET 1600 UTC on Friday, March 23, 2012. GOES-W IR cloud-motion wind data were used in the 18z 23 March 2012 analysis.

MetOp-A dropoff 24-25 Jul 2012

  • 1 Aug 2012 - noted a dropoff in MetOp-A data (HIRS and AMSU-A) around 25 July. NESDIS message mentions a network upgrade at Darmstadt.

Satellite data missing 18UTC 10 Oct 2012

  • 11 Oct 2012 - looks like a lot of satellite radiances are missing, per the coverage plots & from counts in 'ana.log' listing for 18UTC 10 Oct 2012. There is a NESDIS message about the ESPC DDS server being down for several hours (October 10, 2012 1600 UTC - October 11, 2012 0059 UTC) that may have been related to the outage.

Aqua AIRS outage 8-10 Feb 2013

  • 11 Feb 2012 - AIRS outage 8 Feb 21:32 UTC - 10 Feb 01:15 UTC (1 day, 5hrs). On February 8, 2013 at around 21:17:32 GMT the EOS Aqua AtmosphericInfrared Sounder (AIRS) Instrument Scanner entered Shut-down Mode. Interruption to routine science data collection by the AIRS Instrument. No impact to spacecraft bus operations or the other functioning Aqua instruments. An Anomaly Resolution Team (ART) was assembled that included the JPL AIRS IOT and Project Manager, the Aqua FOT, ESMO Management and the Aqua Mission Director. A recovery plan was developed, approved and implemented on Saturday, February 9, 2013. The AIRS instrument was returned to its normal operating mode approximately 8:15pm EST.

SEVIRI/M10 Data outage 1-9(expected) July 2013

AIRS Ch 321 Noise Increase around 19 Sep 2013

  • sidb updated to remove data

MetOp-A IASI outage 5-8 Nov 2013

  • 8 Nov 2013 - The instrument is uploading a new software version to the Instrument Management System during which time all products from Metop-A IASI in the Metop Global Data Service and Regional Data Service will be unavailable. Start November 5, 2013 0700 UTC, expected end November 8, 2013 1700 UTC.

Metop-A data unavailable at Nov 12th 1212UTC

Due to a MetOp-A Satellite anomaly, MetOp-A Instrument data are unavailable from sensing time 12:12 on DOY 316 to 16:41UTC. Returned shortly thereafter (wm update)

OMI total column ozone data were not assimilated between March 2nd-3rd.

AURA OMI total column ozone data were not assimilated between March 2nd-3rd. The assimilated data numbers came back to the normal range afterward.

AIRS data outage March 22.-29., 2014

  • From NOAA Special Bulletin: AIRS Instrument has encountered an anomaly as of

March 22, 2014 17:27 UTC. AIRS NRT data is not be available until further notice.

  • Data came back March 29.

METOP-A MHS data not available from March 26th to May 21st 2013

  • On 26 March 2014, at 08.40 UTC, the MHS instrument on Metop-A entered into a fault mode during preparations for

the out-of-plane maneuvre. Attempts to recover the instrument have so far not been successful and the anomaly investigation is focusing on the possible failure of a hardware switch on the instrument. The instrument is to remain OFF until a better understanding of the problem allows further diagnostic commanding to be performed. This is not expected before mid-next week and the data service could remain off for considerably longer. ESPC stopped receiving the Metop-2 MHS instrument data from EUMETSAT. Technicians are currently investigating this outage.

  • update on April 4: *Eumetsat reports that data will be restored in about 2 weeks.
  • The recovery has been completed. Dissemination of L1B products resumed on 21 May 2014 starting from 9:30 UTC sensing time. Product quality is nominal for all five channels.

Metop-A IASI Decontamination 8 - 12 September 2014

  • 08 September 2014 08:12 UTC - 12 September 2014 12:00 UTC Metop-A - IASI Decontamination IASI GDS Level 1C and Level 2 products will not be available.

SEVIRI/M10 Data outage 2-9 December 2014

  • 4 Dec 2014 - The satellite is undergoing a decontamination procedure. Should return 9 December.
  • 8 Dec 2014 - EUMETSAT switched back to Meteosat-10 to support primary geostationary operations today, December 8, 2014, at

0930 UTC; see Early Completion of Scheduled Decontamination

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