Talk:GEOS-5 ADAS Radiance Monitoring

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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.

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

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."

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.

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.
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