(04/30/10) DMSP On-orbit Attitude Control Test for F-15
(04/30/10) Slight Format Change for IASI Data
(03/01/10) Jason-2 Cycle 60 Reprocessed IGDR Data
(01/27/10) Jason-2 Cycle 57 Reprocessed IGDR Data
(01/21/10) Jason-2 Cycle 56 Reprocessed IGDR Data
Details/Specifics of Change: IDPS VIIRS Moderate products and NDE downstream NUCAPS, VPW, VHP products are impacted due to incorrect S-NPP VIIRS Cloud Mask over the Southern Hemisphere
-Significant areas of the Southern Hemisphere, especially Antarctica, are incorrectly labeled as “snow/ice free.”
-The error is not seen in the Northern Hemisphere (NH).
-VIIRS products for the Southern Hemisphere are impacted in regions of snow and ice.
-VIIRS Gridded Snow/Ice Rolling Tiles are also incorrect over the Southern Hemisphere.
-The root cause is incorrect processing of the NOAA Global Automated Multi-sensor Snow/Ice (GMASI) ancillary data.
-Developers are currently working to implement a fix.
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880
During 10-11 March 2010 the DMSP program office and NOAA DMSP Operations conducted a 24-hour operational test of "gyro-less" attitude control software on DMSP F-15. Preliminary results indicate minimal or no impact to users. For more details please see http://www.ssd.noaa.gov/PS/SATS/MESS/MSG0691518.01.txt
The format of the IASI Level 1C files have slightly changed on 2010 March 15. Please click here to see the PDF containing the IASI L1C format with the updates.http://www.eumetsat.int/idcplg?IdcService=GET_FILE&dDocName=PDF_V3_IASI_LEVEL
On 01-Mar-2010, reprocessed Jason-2 IGDR, S-IGDR, and IGDR-SSHA files from cycle-060 passes 235-254 were received from CNES and replaced at CLASS. The reprocessing was performed to correct problems with the GIM ionospheric and MOG2D dynamic atmospheric corrections for the 26-Feb-2010 IGDRs. The following files (and accompanying xml-formatted metadata files, not shown) were replaced:
On 2019-01-27, reprocessed Jason-2 IGDR, S-IGDR, and IGDR-SSHA files from cycle-057 passes 120-126 were received from CNES and replaced at CLASS. The reprocessing was performed to correct problems with the GIM ionospheric correction in these level-2 files. The following files (and accompanying xml-formatted metadata files, not shown) were replaced:
On 2010-01-21, reprocessed Jason-2 IGDR, IGDR-SSHA, and S-IGDR files from cycle-056 passes 148-245 were received from CNES and replaced at CLASS. The reprocessing was performed to create IGDRs using the new version 3.0 SPA software, so that the files are consistent with the OGDRs produced by version 3.0 of TM-NRT. The new version of OGDR software was implemented on 2010-01-14, beginning with cycle-056 pass 148. Details of the changes between the previous version of the software and the new version 3.0 software are contained in an announcement sent to the Ocean Surface Topography Science Team, here <link to announcement>. The following files (and accompanying xml-formatted metadata files, not shown) were replaced:
Dear OSTST members,
Last week the Jason-2 OGDR near real-time processing software (TM-NRT) was upgraded to version 3.0 at both NOAA and EUMETSAT. This is a major system upgrade from the previous version (2.3), but has minimal impact on users. There are no format changes to the products. TM-NRT-V3 contains a new internal ftp module, provides a common processing package for both Jason-2 and SARAL/Altika, and corrects a few minor anomalies within the OGDR products. The correction of these anomalies is the only difference in data content that end users will observe:
- Several one-byte flags were incorrectly defaulted to 0 vs. 127. They now have a proper _FillValue of 127.
- Four generic processing algorithms didn't properly handle defaults values. These have all been corrected.
- The flag 'alt_state_flag_tracking_mode_20hz' was set to 0, indicating split-gate tracking, when it should have been 1, indicating median tracking mode. The flag is now correctly set to 1 during median tracking.
- The construction of 'net_instr_corr_swh_ku' was incorrect due to a calculation with a wrong bit number. This has been corrected.
- A few netCDF variable attributes (NOT variable names) were misspelled or contained typographical errors that have been corrected:
variable variable_attribute change from V2.3 to V3.0
lon comment Greenwich spelling corrected
lon_20hz comment Greenwich spelling corrected
orb_state_flag_rest comment meaning of flag state '8' corrected
model_dry_tropo_corr standard_name troposphere spelling corrected
model_wet_tropo_corr standard_name troposphere spelling corrected
rad_wet_tropo_corr standard_name troposphere spelling corrected
rad_wet_tropo_corr quality_flag "and" added before "interp_flag_tb"
None of these changes should necessitate changes to your processing code.
Due to unexpected earth terminal testing at the NOAA/Wallops ground station, a single (short) OGDR was produced with TM-NRT-V3.0 prior to the planned transition on the morning of 14-Jan-2010. This single OGDR is JA2_OPN_2PcS056_139_20100113_200656_20100113_202210.
All OGDRs produced by both NOAA and EUMETSAT after the planned transition are now based on TM-NRT-V3.0. This can be confirmed via the 'references' global netCDF attribute: "L1 library=V3.1p1, L2 library=V3.0p1, Processing Pilot=V3-0p1p2p3".
The last OGDR produced with TM-NRT-V2.3 is:
The first (full) OGDR produced with TM-NRT-V3.0 is:
CNES's offline processing software has been updated this week to the same V3.0 core processing (SPA component) as TM-NRT-V3. The minor anomalies listed above will therefore also be corrected in the V3.0 IGDRs and GDRs.
Operationally, the last IGDR produced with SPA-V2.3 was:
and the first IGDR produced with SPA-V3.0 was:
Today CNES has reprocessed the IGDRs for cycle-056 passes 148 to 245 to be consistent with the OGDR products based on TM-NRT-V3. These V3.0 IGDRs will be available via AVISO and CLASS shortly.
Finally, the GDRs for cycle-052 and beyond will be produced with SPA-V3.0. The latest cycle-051 GDRs were produced with SPA-V2.3, and will be released shortly.
If you have any questions regarding the new version 3.0 OGDR/IGDR/GDRs, please contact one of the Jason-2 Measurement Systems Engineers:
Julia Figa: firstname.lastname@example.org
Remko Scharroo: email@example.com
Nicolas Picot: firstname.lastname@example.org
Shailen Desai: email@example.com
Subject:Product Anomaly,Upgraded Infrared Atmospheric Sounding
Date/Time Issued: *SEPTEMBER** 17, 2009 1925 UTC
Topic: Upgraded Infrared Atmospheric Sounding Interferometer (IASI)
Level 2 products from MetOp-2/A Declared Operational
Date/Time Issued: SEPTEMBER 17, 2009 1925 UTC
Satellites Involved: MetOp-2/A
Instruments Involved: All IASI Level 1 and Level 2 Products
Product(s) or Data Impacted: All IASI Products
Date/Time of Initial Impact: September 17, 2009 1800 UTC
Date/Time of Expected End: TBD
User Actions: None
Details/Specifics of Changes: NOAA/NESDIS will be upgrading the Infrared
Atmospheric Sounding Interferometer (IASI) data processing system and
the upgraded products will be operationally available to its users from
the IASI Products Processing System (IPPS), at the Environmental
Satellite Processing Center (ESPC). This system upgrade includes the
higher resolution (1km X 1km) Digital Elevation Model (DEM), Local Angle
Correction, global grids changed to 0.5X2.0, sub-grid image with a dead
pixel mask added to daily 3X3 global grids, new CH4 first guess and CH4
channel list, updated rapid transmittance algorithm (RTA) forward
model, adjustments to CO2 retrieval, removal of AMSU-A channel 7 due to
high noise, rejection threshold changed to eliminate outliers (cases not
meeting cloud clearing assumptions, and a new product SO2 flag to alert
users for the presence of volcanic SO2 plumes. System scripts are also
changed to improve reliability and performance. The upgraded products
will be available to both real-time users and climate users through
NESDIS Environment Satellite Processing Center (ESPC) Data Distribution
Server (DDS) and Comprehensive Large Array-data Stewardship System
(CLASS) starting on September 17, 2009.
Contact Information : Awdhesh Sharma, 301-763-8142 ext 185,
Web Site(s) for applicable information:
Details of Outage
NRL has been able to assess the magnitude of the RADCAL interference
on F15 SSMI. The F-15 orbit plane is precessing westward which has resulted
in the coincidence with F13. Their study showed that the large increase in
interference from 2/4 to 2/11. They confirmed that there is significant
orbital variations of the RADCAL interference with maximum approaching 5K.
Also, the orbital variability creates a very difficult problem to address
since it requires a correction scheme that depends on orbital position of
the S/C. Therefore, the F-15 SSMI 22V channel and associated EDRs are
unusable until a new correction algorithm is developed and/or the sensor
At this moment, FNMOC is still leaving the data ingest on inside of
the FNMOC since their NWP data assimilation model has a good QC program at
the front end rejecting the bad obs. We would like to know if our SSM/I
operational users still need the data feed. If so, please send an email to
Vincent.Tabor@noaa.gov stating your requirement. Also, please be
advised of the increasing level of interference and the degraded quality of the 22v
SDRs and associated EDRs.
FNMOC will continue to monitor the RADCAL interference and report
major changes. This information will be passes on to our users. Please let
us know, if you have any questions.
Data Affected by the Outage:
SSM/I data F-15 EDRs, TDRs and SDRs and products produced from this data
Date and Time of the Outage: 2/26/2009, 1730 UTC
Length of the Outage: Until further notice
Contact Point for Questions: ESPC Operations OCL (Operations Crew Leader), 301-817-3880
The GOES-12 navigation has been corrected as of the 20:15Z image.
***Details of the Outage:*
At 22:40Z on Jan 27, 2009, GOES-12 had a re-occurrence of a thruster
leak which caused a Yaw momentum build up. This caused the navigation
to be off by approximately 20 scan lines. As of 17:15Z the navigation
is still off and engineers are working on the problem. It should be
fixed within a couple of hours.
*Data Affected by the Outage:
*GOES-12 * *
*Date and Time of the Outage:
*01/27/2009 2240 UTC, 6:40 PM, EST
*Length of the Outage:
*Until further notice* *
*Contact Point for Questions:
ESPC Operations OCL (Operations Crew Leader), 301-817-3880 *
The data provide for DMSP data in NetCDF format, NCDC, has stopped providing the data until they have a chance to clean up the data sets.
4/2008 Posted message on the Home page. Removed from the message from the home page 1/20/2009.
New DMSP Data: NOAA's National Climatic Data Center is now transferring DMSP SSMI-SSMIS TDR and SDR data in NetCDF format to CLASS along with embedded quality flags to identify climatology anomalies and errors in geolocation, temperature and time values. Also, the period of record is now extended back to August 1993. The date range for the currently available DMSP SSMI TDR data is from 19 August, 1994 through April 1999, and from December 2002 through June 2008. CLASS continues to offer the native format SSMI TDR and SDR, which started in February 1997.
Current message on the home page 1/21/09:
DMSP TDR and SDR NetCDF data: is currently available from 19 August, 1994 through 30 April,1999 and from 21 June, 2001 through 22 July, 2008. The native format, which starts in February 1997, is still offered.