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MLS NRT Products

warn_icon.gif IMPORTANT MESSAGE Sep 29, 2016    Aqua AMSU-A2 and AIRS instrument anomalies   

The AIRS instrument was returned to service at 21:02 UT on Sept 27.  AIRS and AMSU radiances (A1 channels only) are being produced and being made available through the GES DISC servers.

The AMSU A2 instrument is still in survival mode.  The lack of data from AMSU Channels 1 and 2 is negatively impacting the Level 2 retrievals.  Consequentially, we have suspended production of the AIRS+AMSU Level 2 products (AIRI2CCF.006, AIRX2RET.006 and AIRX2SUP.006) for the near future until a solution can be put into place. This suspension also applies to the AIRS+AMSU Level 3 products.

GES DISC is continuing to produce the AIRS-only Level 2 and Level 3 products (AIRS2RET.006, AIRS2SUP.006, AIRS2CCF.006, AIRS3STD.006, etc.).

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There were two separate Aqua AIRS instrument anomalies over the weekend:

 1) At approximately 19:47 UT on September 24 the AMSU-A2 instrument turned off.  The A1 instrument continued and does continue to collect science data; that data is being made available at GES DISC now.  It is expected that the A2 instrument will be taken through it's start up procedure in the near term.

 2) At approximately 03:25 UT on September 25, the AIRS instrument's cooler and focal plane temperatures began to rise.  The AIRS instrument was commanded out of its SCIENCE operating mode at 15:47 UT on September 25, and is still in that mode as of this message.  Data processing of AIRS L1B products ceased once the instrument was taken out of SCIENCE mode.  However, data was still produced over the interval 03:25 - 15:47 UT.  Users that may have accessed that data should not use, as it is invalid.

Further status will be communicated as information becomes available.

 

warn_icon.gif IMPORTANT MESSAGE Aug 15, 2016    Urgent: Change in access method to GES DISC servers   

Attention GES DISC LANCE users:

Effective October 3 2016, GES DISC will no longer offer FTP access to its servers. Data downloads will need to use the HTTP protocol. Any scripts or applications currently in use that rely on FTP access will need to be modified to use HTTP protocol. Some suggestions for using wget with HTTP appear on this web page:

http://disc.sci.gsfc.nasa.gov/registration/registration-for-data-access#Wget

Note also that GES DISC recently implemented its interface with the Earthdata Login that requires users to register with Earthdata in order to access data products in the GES DISC archive servers. Existing LANCE userids and passwords will work as Earthdata Login credentials, but there is one step that must be completed before accessing data from GES DISC, and that is to grant profile access to the NASA GESDISC DATA ARCHIVE application. Detailed instructions for doing that appear on this web page:

http://disc.sci.gsfc.nasa.gov/registration/authorizing-gesdisc-data-access-in-earthdata_login

Questions relating to this email should be addressed to the GES DISC Help Desk:

http://disc.sci.gsfc.nasa.gov/contact.shtml

MLS NRT Level-2 data products are currently available from the GES DISC. Please select the link from the table below for a description of that MLS NRT data product, with links to the data files and documentation.

MLS NRT data product documentation can be found under the Aura documentation page (see URL below). Please download both the Version 3.4 NRT User Guide and the Version 3.3 Data Quality Document for Standard Products before using these data.

MLS documentation: http://disc.sci.gsfc.nasa.gov/Aura/additional/documentation/

 

Level 2 Version 3.4 Near-Real-Time Products (~7 most recent days)
ShortName & Data Access Description
ML2O3_NRT.003 MLS/Aura Near-Real-Time L2 Ozone (O3) Mixing Ratio
ML2T_NRT.003 MLS/Aura Near-Real-Time L2 Temperature
ML2HNO3_NRT.003 MLS/Aura Near-Real-Time L2 Nitric Acid (HNO3) Mixing Ratio
ML2CO_NRT.003 MLS/Aura Near-Real-Time L2 Carbon Monoxide (CO) Mixing Ratio
ML2N2O_NRT.003 MLS/Aura Near-Real-Time L2 Nitrous Oxide (N2O) Mixing Ratio
ML2SO2_NRT.003 MLS/Aura Near-Real-Time L2 Sulfur Dioxide (SO2) Mixing Ratio
ML2H2O_NRT.003 MLS/Aura Near-Real-Time L2 Water Vapor (H2O) Mixing Ratio

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