National Oceanic and Atmospheric Administration, United States Department of Commerce

CLASS - RSS Feed

Subscribe to feed


Check out the new GOES-16 ABI L2 products recently released! (3/8/2018):
A number of GOES-16 ABI Level 2 products are now available to the public. All ABI products, as well as the L1B radiance data, are found under the GRABIPRD data family. For complete details on data maturity start dates and access dates please go to https://www.ncdc.noaa.gov/data-access/satellite-data/goes-r-series-satellites. Also, it is advised that users are aware of any of the data issues by clicking on the appropriate readme links provided. The remaining products will be released once CLASS receives the green light from the program office.

As you may know, GOES-17 was successfully launched on March 1, 2018! It will replace GOES-15, which is GOES-West, sometime this Fall. Data from GOES-17 will remain restricted until further notice.
Published:   2018-08-08 20:51:00.0

Attention JPSS Users. Start dates of products now available to the public. (4/25/2018):

  • 12/08/2017 - ATMS SDR and TDR
  • 01/17/2018 - CrIS SDR
  • 02/01/2018 - VIIRS SDR
  • 02/01/2018 - VIIRS Imagery Bands

Data sets are available back to Beta Maturity. Be sure to review the readmes for any data issues and caveats on the STAR JPSS/SNPP Algorithm Maturity Matrix website at https://www.star.nesdis.noaa.gov/jpss/AlgorithmMaturity.php.

For easy access to the most recent JPSS global daily tar files please go to ftp://ftp-npp.bou.class.noaa.gov.

Published:   2018-04-25 13:20:30.0

****Attention CLASS Users! ACTION REQUIRED!!****:

Web and FTP URLs were changed! (06/07/2018):
CLASS made domain name changes that will break saved links:

  • On 5/24/2018, the CLASS Asheville URL changed
  • - from www.class.ncdc.noaa.gov
  • - to www.avl.class.noaa.gov

    • On 6/06/2018, the CLASS Boulder URL changed
  • - from www.class.ngdc.noaa.gov
  • - to www.bou.class.noaa.gov

Using the generic www.class.noaa.gov is best for all web services.

FTP addresses will be affected as well and must be changed:
  • - ftp.class.ncdc.noaa.gov changed to ftp.avl.class.noaa.gov on 6/05/2018
  • - ftp.class.ngdc.noaa.gov changed to ftp.bou.class.noaa.gov on 6/06/2018

Suomi NPP JPSS Satellite Revolving Anonymous FTP URL was changed:
  • - ftp-npp.class.ngdc.noaa.gov changed to ftp-npp.bou.class.noaa.gov on 6/06/2018

HTTP Download addresses will be affected and must be changed:
  • - https://download.class.ncdc.noaa.gov/download changed to
  • https://download.avl.class.noaa.gov/download on 5/24/2018
  • - https://download.class.ngdc.noaa.gov/download changed to
  • https://download.bou.class.noaa.gov/download on 6/06/2018

Important Notes:
  • - CLASS IP addresses are not changing
  • - The old URLs will remain accessible for at least 2 weeks


Published:   2018-04-19 14:05:30.0

Attention New CLASS Users – See tutorial on accessing data from CLASS (4/12/2018):

Please click on the following link to get step by step instructions on how to use CLASS to search and order data: https://www.avl.class.noaa.gov/notification/pdfs/CLASS%20Data%20Access%20Tutorial_042015.pdf.

If you have any questions or need assistance please submit an email to CLASS Help Desk.
Published:   2018-04-12 14:05:30.0

The new NOAA-20 Advanced Technology Microwave Sounder (ATMS) data are now available (3/8/2018) :
The Sensor Data Records (ATMS_SDR) and Temperature Data Records (ATMS_TDR) have been declared Provisional Maturity on January 23, 2018. Data are available back to Beta Maturity on December 8, 2017. Be sure to review the readmes for remaining data issues and caveats on the STAR JPSS/SNPP Algorithm Maturity Matrix website at https://www.star.nesdis.noaa.gov/jpss/AlgorithmMaturity.php.

For easy access to the most recent JPSS global daily tar files please go to ftp://ftp-npp.bou.class.noaa.gov.
Published:   2018-03-08 20:50:00.0

GOES-16 Geostationary Lightning Mapper (GLM) Data Now Available (02/07/2018):
The GLM Level-2 products can now be ordered from CLASS under the Family name GOES-R Series GLM L2+ Data Product (GRGLMPROD). Please be sure to read the GLM data search page Notes section for details on product maturity levels, their timelines, and all documented issues found within the Readme files.

If you have any questions or need assistance please submit an email to CLASS Help Desk.
Published:   2018-02-07 20:29:30.0

Attention GOES-16 Data Users! (01/19/2018):

Datatype GLM-L2-LCFA data are publicly available on January 19, 2018. Data from January 19, 2018 to the present are at "provisional validation" level. Please see Readme for details.

For questions first check the FAQ, otherwise please contact CLASS Help Desk at class.help@noaa.gov.

Product Documentation is available at http://www.goesr.gov/resources/docs.html.
Categories:   NOAA, NES
Published:   2018-01-19 12:32:16.0

Attention GOES-16 and GOES-13 Data Users! (1/8/2018):
Since December 18, 2017, GOES-16 has replaced GOES-13 as the official GOES-East satellite. CLASS has received the final GOES-13 file at midday on January 8, 2018. The GOES-16 Advanced Baseline Imager data can be ordered from CLASS under the data family named "GOES-R Series ABI Products GRABIPRD (partially restricted L1b and L2+ Data Products)". Please contact the CLASS Helpdesk for any assistance at class.help@noaa.gov.
Published:   2018-01-08 00:00:00.0

Attention GOES-16 and GOES-13 Data Users! (1/3/2018):
Beginning on December 18, GOES-16 replaced GOES-13 as the official GOES-East satellite. Data has resumed flowing into CLASS on December 14 at 1600 UTC. GOES-13 will be turned off on January 8, 2018, and data from the satellite will cease to be archived. The date was postponed from January 3 to January 8 due to the critical weather day declared by NOAA.
Published:   2018-01-03 00:00:00.0

Attention GOES-16 Data Users! (12/19/2017):

The GOES-R Peer Stakeholder - Dataype SEIS-L1b-MPSH Data are publicly available on December 16, 2017. Data from December 16, 2017 to the present are at "provisional validation" level. Please see Readme for details. Other SEISS datatypes will be available after the corresponding sensors reach Provisional maturity. While the GOES-16 L1b SEIS-L1b-MPSH data have reached provisional validation, please keep in mind that these products have not been fully validated.


Categories:   NOAA, NES
Published:   2017-12-19 12:32:16.0

Attention GOES-16 and GOES-13 Data Users! (12/28/2017):
Beginning on December 18, GOES-16 replaced GOES-13 as the official GOES-East satellite. Data has resumed flowing into CLASS on December 14 at 1600 UTC. GOES-13 will be turned off on January 3, 2018, and data from the satellite will cease to be archived.
Published:   2017-12-18 19:00:00.0

Attention GOES-16 Data Users! (12/01/2017):
GOES-16 data will be unavailable until approximately December 20, 2017 while the satellite drifts into the permanent operational East position. Another announcement will be posted as soon as we learn when the data will resume flowing into the archive.
Published:   2017-12-01 19:39:38.0

Attention JPSS Data Users! (11/20/2017):
The next in the series of NOAA Joint Polar Satellite Systems, JPSS-1, was successfully launched from Vandenberg Air Force Base in California on November 18. The newly launched satellite will be designated as NOAA-20.

NOAA-20 will orbit in the same plane as Suomi NPP, operating about 50 minutes ahead of Suomi NPP, allowing important overlap in observational coverage. While the suite of instruments on the new satellite undergo a thorough checkout, all data coming to CLASS will be restricted for a while. If you have any questions, please submit an email to class.help@noaa.gov
Published:   2017-11-20 17:27:00.0

Suomi NPP data access status (updated 09/27/17):

The newer JPSS products from the NOAA Enterprise System are now grouped with the rest of the JPSS data families. Several of the legacy products have been replaced by newer, higher quality products in the new JPSS data families.  These products are in C-F compliant netCDF format.  Below is a list of the new families now under JPSS.

JPSS Sounder Products (JPSS_SND) - formerly S-NPP NDE Granule Data (NDE_L2)
JPSS VIIRS Products (Granule)(JPSS_GRAN)  - NEW!
JPSS VIIRS Products (Non-Granule)(JPSS_NGRN) - formerly S-NPP NDE Daily (NDE_DAILY)
JPSS Tropical Cyclone Products (JPSS_TC) - formerly S-NPP NDE Microwave Tropical Cyclone (NDE_TC)
JPSS Ozone Products (JPSS_OZONE) - created earlier this year

     

Users are encouraged to check the product and algorithm maturity levels throughout the history of the product at the STAR JPSS Algorithm Maturity Matrix website at https://www.star.nesdis.noaa.gov/jpss/AlgorithmMaturity.php.

 

Many of these products are online in daily TAR files for the most recent 90 days at ftp://ftp-npp.bou.class.noaa.gov.

  

For documents and other information please go to the STAR Science Documents website at https://www.star.nesdis.noaa.gov/jpss/Docs.php which includes JPSS Algorithm Theoretical Basis Documents (ATBD), Users Guides, Cal/Val plans, and much more. If you have any questions please submit an email to class.help@noaa.gov


Published:   2017-09-27 18:49:13.0

Attention Satellite Users! (07/10/2017):

The GOES-R Peer Stakeholder - Product Validation Review for ABI L1b and CMI Provisional Maturity was held on June 1, 2017. As a result of this review, NOAA has confirmed that the ABI L1b and CMI data are at Provisional Validation Maturity as of June 1, 2017 (see Readme for details). This means that these products can be publicly accessed within the CLASS data family, GOES-R Series ABI Products (GRABIPRD).

While the GOES-16 ABI L1b and CMI data have reached provisional validation, please keep in mind that since GOES-16 satellite has not been declared operational, its data are still considered preliminary and undergoing testing.


Categories:   NOAA, NES
Published:   2017-07-10 12:32:16.0

VIIRS Active Fires Product (06/21/2017):
VIIRS Active Fires EDR/ARP (AVAFO) from the Interface Data Processing Segment (IDPS) is no longer archived as of 2017-06-28. Users should use the higher quality, replacement product, JPSS Active Fires (AF), which began on 2016-03-15 and is available from the CLASS data family S-NPP Data Exploitation Granule (NDE_L2).
Published:   2017-06-21 00:00:00.0

Save the Date! (updated 06/12/2017):
The NOAA Satellite Conference 2017 is just days away! However, there's still time to register! The conference will be held at the City College of New York, CUNY from July 17 - 20, 2017.

Visit the NSC Conference Website at http://www.nsc2017.org for details.
Published:   2017-06-12 19:00:00.0

Save the Date! (04/24/2017):
We are pleased to announce that the National Oceanic and Atmospheric Administration (NOAA) Satellite Conference for Direct Readout, GOES/POES, and GOES-R/JPSS users will take place from July 17-20, 2017 in New York, New York.

Visit the NSC 2017 website for more details about how to register and submit a poster abstract. We will be updating the site regularly as we finalize the conference logistics, agenda, registration, and hotel information. Please also take a moment to fill out our pre-conference survey.
Published:   2017-04-24 14:00:00.0

S-NPP Data Products now correct over the Southern Hemisphere (04/12/17):

Update #1: This issue has been fixed with the IDPS (Build Mx2.0.1). Transition to Operations (TTO) occurred on April 10, 2017.

Topic: S-NPP Data Products Incorrect over the Southern Hemisphere

  • Date/Time Issued: April 12, 2017 1600 Z
  • Product(s) or Data Impacted: IDPS VIIRS products and NDE NUCAPS, VPW, VHP products
  • Date/Time of Initial Impact: Wednesday, March 8, 2017 1500Z
  • Date/Time of End: Monday, April 10, 2017 1600Z

    • 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.

  • More details are found here:
    • http://www.ssd.noaa.gov/PS/SATS/SPBULL/MSG1021554.02.txt

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


    Published:   2017-03-27 00:00:00.0

    Suomi NPP data access status (updated 01/11/17):
    The majority of S-NPP products are available for ordering through CLASS website. These products are grouped under JPSS and S-NPP on the drop down product list. It is important to note the product/algorithm maturity levels from beginning dates to current dates by visiting the STAR JPSS Algorithm Maturity website at https://www.star.nesdis.noaa.gov/jpss/AlgorithmMaturity.php.

    For further assistance please check out the STAR Science Documents website for JPSS Algorithm Theoretical Basis Documents (ATBD), Users Guides, Cal/Val plans, and much more. If you have any questions please email the CLASS Help Desk.
    Published:   2017-01-10 14:00:00.0

    Celebrating 5 Year Anniversary for Suomi NPP (10/28/16):
    Suomi National Polar-orbiting Partnership (S-NPP) is celebrating its 5 year anniversary from launch on 10/28/2011. We'd like to congratulate the Joint Polar Satellite System (JPSS) program for a successful satellite launch and the continued orbit and data transmission back to earth. We would also like to congratulate the NOAA JPSS ground system for tracking, receiving and transmitting the data to CLASS for archival and access. To date, the CLASS has archived 5.64 Petabytes of S-NPP data with more than 18 Petabytes of data delivered to its user community. Congratulations to all!
    Published:   2016-10-27 19:03:27.0

    Attention Users of NESDIS Legacy SST and Aerosol Products(updated 06/07/16):

    The following NESDIS legacy SST products (also known as MUT SST products) were produced from a software application developed in 1978. Science maintenance for these products has ceased. These products, with the exception of some of the aerosol products, have corresponding higher quality replacement products available from NESDIS.

    The products discontinued by NESDIS and their replacement (alternative) products are listed below:

    1. Aerosol Optical Thickness (100 KM) (AERO100) - Replacement or alternative product: Navy Aerosol Analysis and Prediction System (NAAPS) provided at http://www.nrlmry.navy.mil/
    2. Sea Surface Temperature (14 KM North America) (SST14NA) - Replacement or alternative product: Geo-Polar 5km Global Nighttime-only Blended SST under the GOESSST search page
    3. Sea Surface Temperature (100 KM Global) (SST100) - Replacement or alternative product: Geo-Polar 5km Global Blended SST under the GOESSST search page
    4. Sea Surface Temperature (50 KM) (SST50) - Replacement or alternative product: Geo-Polar 5km Global Blended SST under the GOESSST search page

    Categories:   NOAA, NES
    Published:   2016-05-18 14:42:22.0

    Suomi NPP data access status (updated 02/25/16):
    The majority of S-NPP products are available for ordering through CLASS. For those datasets available for public access the begin dates are indicated next to the product names under the many JPSS search pages. A complete table of SNPP products showing product maturity level date ranges has recently been added to the CLASS FAQ under the NPP FAQ section. Also, links to the Readme files have been moved from the CLASS front page to this table located at the following URL:https://www.avl.class.noaa.gov/release/data_available/npp/npp_public_data_table.htm

    For further assistance please check out the STAR Science Documents website for JPSS Algorithm Theoretical Basis Documents (ATBD), Users Guides, Cal/Val plans, and much more. If you have any questions please email the CLASS Help Desk.
    Published:   2016-02-25 16:30:00.0

    Attention Ocean Color User Community (09/29/15):
    The operational chlorophyll frontal products generated by the Office of Satellite and Product Operations (OSPO) Okeanos operational production system are now flowing into CLASS with backlogged data going back to August 1, 2015. The archived products include granule chlorophyll gradient magnitude and direction and merged chlorophyll gradient magnitude for over 9 CoastWatch regions (refer to http://www.ospo.noaa.gov/Products/ocean/color/index.html). The historical data can be ordered by searching ’Ocean Color Frontal Products (OC_Frontal)’.
    Published:   2015-09-30 11:00:00.0

    Attention (09/29/15):
    The Cooperative Institute for Meteorological Satellite Studies is hosting a GOES Animation Contest in celebration of GOES’ 40th birthday. The GOES series has been in operation since October 16, 1975, producing over 3,000,000 images. GOES satellite images can be ordered from CLASS under the "GOES Satellite Data - Imager" data family. The submission deadline is October 12. For details please go to http://cimss.ssec.wisc.edu/goes_40th/contest/.
    Published:   2015-09-29 14:00:00.0

    Attention S-NPP Users! (07/13/15):
    NESDIS S-NPP Data Exploitation (NDE) Level 2 and Level 3 Products are now available for the most recent 90 days at ftp://ftp-npp.bou.class.noaa.gov. These products are tarred and gzip compressed for easier access. The products include NOAA-Unique CrIS-ATMS Processing System (NUCAPS) Cloud-Cleared Radiances (CCRs) and Environmental Data Records (EDRs) and daily Level 3 NH/SH Polar Winds and Green Vegetation Fraction (GVF) products.
    Published:   2015-07-13 15:30:00.0

    New tutorial on how to search and order data in CLASS! (04/27/15):
    A tutorial for searching and ordering data through CLASS can be found here: CLASS Data Access Tutorial. The tutorial gives a step by step screen capture views of the searching and ordering process from registering with CLASS to checking on the status of your order. It also covers the various levels of access services offered from CLASS at this time. If you have any questions please email the CLASS Help Desk.
    Published:   2015-04-27 13:45:00.0

    Notice - New JPSS Official Ancillary Data Product Available (04/24/14):
    The NOAA Global Multi-sensor Automated Snow/Ice (GMASI), NH and SH product is available for ordering from the JPSS NP_ODAD data Family. The ingest of the supporting data for the VIIRS snow/ice products began on March 9, 2015. There are two files daily each for the NH and SH.
    Categories:   NOAA, NES
    Published:   2015-04-14 14:20:59.0

    Join us at the 2015 NOAA Satellite Conference! (2/5/15)::
    The conference will be held at Greenbelt Marriott Hotel in Greenbelt, Maryland, April 27 - May 1, 2015. For more information and registration please go to http://satelliteconferences.noaa.gov/2015/index.html..
    Published:   2015-02-05 14:00:00.0

    Attention CLASS Users (01/29/15):
    CLASS is planning to conduct maintenance at all three sites Tuesday, February 3, 2015, from 1200 to 2000 UTC (7:00 AM - 3:00 PM EST). During the maintenance period all web services will be off-line. However, you can still retrieve your data from the ftp servers. Once maintenance has been completed, CLASS will be available for normal operations. We apologize for the inconvenience. If you have any questions please email CLASS Help Desk.
    Published:   2015-01-29 19:45:00.0

    Attention CLASS Users (12/11/14):
    CLASS is planning to do maintenance at all three sites this coming Tuesday, December 16, 2014, from 1200 to 2000 UTC (7:00 AM - 3:00 PM EST). During the maintenance period all web services will be off-line. However, you can still retrieve your data from the ftp servers. Once maintenance has been completed, CLASS will be available for normal operations. We apologize for the inconvenience. If you have any questions please email CLASS Help Desk.
    Published:   2014-12-11 18:00:00.0

    Suomi NPP CrIS Full Spectrum announcement (12/04/14):
    On December 4, 2014, at approximately 1509 UTC, the CrIS Instrument transitioned to full spectrum mode. Full length Interferograms for the Mid-Wave and Short-Wave IR channels are now being collected. All Stored Mission Data products, SDRs and higher level products are expected to remain unchanged.
    Published:   2014-12-04 14:30:00.0

    The 2015 NOAA Satellite Conference Registration is now open! (11/17/14):
    Attendee and Exhibitor Registration and Call for Poster Abstracts are now open! The conference will be held at Greenbelt Marriott Hotel in Greenbelt, Maryland, April 27 - May 1, 2015. For more information and registration please go to http://satelliteconferences.noaa.gov/2015/index.html..
    Published:   2014-11-17 14:30:00.0

    Attention CLASS Users! (10/23/14):
    ESPC, the CLASS data provider for much of the data coming to CLASS, is currently undergoing unexpected maintenance. This event started on 10/20/14 at 2200 UTC and ESPC is in process of restoring connectivity. As soon as new information becomes available, the CLASS home page will be updated appropriately. Please note that the S-NPP data is unaffected by this outage. If you have any questions please contact the CLASS Help Desk.
    Published:   2014-10-23 20:45:00.0

    Attention CLASS Users! (10/22/14):
    ESPC, the CLASS data provider for much of the data coming to CLASS, is currently undergoing unexpected maintenance. This event started on 10/20/14 at 2200 UTC and there is currently no established date for return of service. As soon as new information becomes available, the CLASS home page will be updated appropriately. Please note that the S-NPP data is unaffected by this outage. If you have any questions please contact the CLASS Help Desk.
    Published:   2014-10-22 13:40:00.0

    Attention S-NPP Users (10/14/14):
    On October 15, 2014, CLASS has implemented changes to the S-NPP Search Pages. The Instrument level searches are now basically divided into three processing levels, i.e. RDR, SDR and EDR. The VIIRS EDRs data family are further split between the environmental products, intermediate products, and imagery bands.

    There are several reasons for doing so.

    1) This will enhance discovery and access for users searching within data discovery catalogs allowing users to find S-NPP products in a more logical format. We found that the majority of ad hoc orders and subscription orders (>70%) is unique to datatypes within a specific processing level.
    2) It will give CLASS greater flexibility to configure access for large orders, since file volumes vary greatly from one processing level to another.
    3) It addresses the issue of null results on RDR node searches.

    Unfortunately, the split of the S-NPP instrument level data families into instrument-processing level data families will change Subscription IDs since these are based on the original CLASS S-NPP Data Families. Please send an email to CLASS Help Desk to receive further information if you did not receive email notification

    We appreciate your support as we attempt to improve data discovery and access and if you have any questions please email CLASS Help Desk.
    Published:   2014-10-14 15:00:00.0

    Attention CriMMS Users (09/08/2014):
    Per NOAA JPSS Program office directive (dated 8-28-2013), the Interface Data Processing Segment (IDPS) has stopped producing the Cross-track Infrared and Microwave Sounder Suite of products as of September 8, 2014. The replacement product is the NOAA Unique CrIS/ATMS Processing System (NUCAPS) EDRs and can be ordered from CLASS under the data family S-NPP Data Exploitation Granule Data (NDE_L2). If you have any questions please email CLASS Help Desk.
    Published:   2014-09-08 19:32:00.0

    Update#3: Attention CLASS Users (09/04/14):
    The backlog of S-NPP ad hoc orders and some subscription orders should return to normal by September 5. Please refrain from re-ordering the same files which will only add to the backlog. We appreciate your continued patience while we get caught up. If you have any questions please email CLASS Help Desk.
    Published:   2014-09-02 18:50:00.0

    Update#2: Attention CLASS Users (09/02/14):
    The backlog of ad hoc and subscription orders are near normal, with the exception of S-NPP ad hoc orders which is estimated to last through Wednesday, September 3. We advise that you refrain from re-ordering the same files which only adds to the backlog. We appreciate your continued patience while we get caught up. If you have any questions please email CLASS Help Desk.
    Published:   2014-09-02 18:50:00.0

    Update! Attention CLASS Users (08/29/14):
    Since August 22, 2014, CLASS had been having issues replicating data from its providers to the distribution nodes in Asheville, NC, and Boulder, CO. It appears that the issues have been resolved and CLASS is returning to nominal operating conditions. We expect the backlog of subscription and ad hoc orders to be caught up by September 1. If you have any questions please email CLASS Help Desk.
    Published:   2014-08-29 20:40:00.0

    Attention CLASS Users (08/25/14):
    Since August 22, 2014, CLASS has been having issues replicating data from its providers to the distribution nodes in Asheville, NC, and Boulder, CO. This has impacted timely delivery of subscription orders and many ad hoc orders for up to three days. CLASS is working closely with the vendor to resolve this issue as quickly as possible. If you have any questions please email CLASS Help Desk.
    Published:   2014-08-25 20:00:00.0

    Save the Date! April 27 - May 1, 2015: NOAA Satellite Conference:
    We are pleased to announce the National Oceanic and Atmospheric Administration (NOAA) Satellite Conference (NSC 2015) for Direct Readout, GOES/POES, and GOES-R/JPSS Users, which is being planned for April 27 - May 1, 2015 in Greenbelt, Maryland. The spotlight theme is "Preparing for the Future of Environmental Satellites." For more information and registration please go to http://satelliteconferences.noaa.gov/2015/index.html.
    Published:   2014-08-21 17:40:00.0

    Attention S-NPP Users (08/05/14):
    Beginning on August 11-14, 2014, CLASS started receiving the majority of S-NPP data in gzip compressed format from JPSS for ATMS, CRIS, CRIMMS, OMPS and VIIRS. All other data types will remain uncompressed. Please see the Notes section of a particular product to read additional details on the compression. The file names will remain the same. Other than the file size being smaller, users do not need to make any changes to their software to use the data. If you have any questions please email CLASS Help Desk.
    Published:   2014-08-05 13:30:00.0

    Attention CLASS Users (07/15/14):
    CLASS will be off-line for maintenance on Thursday, July 17, from 1230 to 1900 UTC. CLASS subscriptions will be paused and the web sites will be off-line. However, access to your completed orders will remain available on the CLASS ftp servers during maintenance. We apologize for the inconvenience and will try to minimize the downtime. If you have any questions please email CLASS Help Desk.
    Published:   2014-07-15 09:50:00.0

    Attention CLASS Users (07/11/14):
    CLASS will be off-line for maintenance on Monday, July 14, from 1230 to 1900 UTC. CLASS subscriptions will be paused and the web sites will be off-line. However, access to your completed orders will remain available on the CLASS ftp servers during maintenance. We apologize for the inconvenience and will try to minimize the downtime. If you have any questions please email CLASS Help Desk.
    Published:   2014-07-11 10:50:00.0

    Attention CLASS Users (06/23/14):
    CLASS will be off-line for maintenance Wednesday, 6/25/14 from 1300 - 1800 UTC for an upgrade. CLASS subscriptions will be paused and the web sites will be off-line. CLASS orders may be downloaded from the ftp areas. We apologize for the inconvenience and will try and minimize the downtime. If you have any questions please email CLASS Help Desk.
    Published:   2014-06-23 17:00:00.0

    Attention All CLASS users (06/23/14):
    Recently, you may have heard about a new internet security weakness, known as Heartbleed, which is impacting some websites. There is no indication that Heartbleed has been used against www.class.noaa.gov or that any personal information has ever been at risk. However, we are asking users to change their current password out of an abundance of caution to ensure the protection of your information.
    Published:   2014-06-23 16:59:00.0

    Attention CORS users (06/23/14):
    Starting January 1, 2014, the National Geodetic Survey's CORS data archived at CLASS now includes GPS+GLONASS data for stations with GNSS-capable equipment. The GLONASS broadcast navigation file (BRDC) is also available for users at the same starting date. (GLO navigation file name example: brdc1680.14g.gz)

    CORS data collections include RINEX since 1994 and raw GPS from selected CORS sites since 2004. The original at-sampling rate was retained except where there was only the 30-second decimated rate data. For more info see the CORS CLASS search page.
    Published:   2014-06-23 16:58:00.0

    NOAA-16 retires after more than 13 years of service (06/12/14):
    NOAA-16 was decommissioned on June 9, 2014 at 14:23 UTC after it suddenly stopped sending data to Earth early on June 6. NOAA-16 had an exceptionally long run after it was launched in 2000 with a planned lifespan of 3 to 5 years. It was replaced by NOAA-18 in 2005 as the primary satellite. During its lifetime, NOAA-16 produced almost 400,000 orbital files totaling well over 13 TB of data.
    Published:   2014-06-12 15:26:43.0

    Attention NOAA-16 Users (06/10/14):
    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 (5 June at 8:55 p.m. EDT) at the Wallops Command and Data Acquisition (WCDA) station on REV 70655. The last reported HRPT was at 04:32 UTC. Please be advised your subscriptions for NOAA-16 data will stop. The data will no longer be streamed to CLASS for ingest and NOAA-16 subscriptions will stop.
    Published:   2014-06-10 17:19:44.0

    Attention CLASS Non SNPP Users:
    All data but Suomi NPP orders will be delayed during the scheduled maintenance on Tuesday, May 13, 2014, from 1400 UTC to 2200 UTC. The ftp download site ftp.class.ngdc.noaa.gov will be available to access non SNPP data already processed. We apologize for any inconvenience this may cause.
    Published:   2014-05-08 19:22:21.0

    Attention CLASS Users:
    Suomi NPP orders will be delayed during the scheduled maintenance on Thursday, May 8, 2014, from 1200 UTC to 2000 UTC. The ftp download site ftp.class.ncdc.noaa.gov will be available to access SNPP data already processed. We apologize for any inconvenience this may cause.
    Published:   2014-05-06 15:16:26.0

    Attention CLASS USERS:
    Please note: Processing and dissemination of S-NPP data from ad hoc orders will be paused due to planned maintenance on Thursday, April 24, 2014, from 1000 to 1700 UTC. There will be no access to ftp://ftp.avl.class.noaa.gov/ during this time.
    Published:   2014-04-23 13:37:06.0

    :
    CLASS NGDC will be conducting maintenance from 2/19/2014 1600 UTC to 2/20/2014 0000 UTC. During this time CLASS will not be able to process any orders. This maintanance will not affect delivery schedule of Suomi NPP datasets since it is being serviced from CLASS NCDC. If you have any questions please email CLASS Help Desk.
    Published:   2014-02-18 18:53:06.0

      OMPS:

        Readme for released S-NPP OMPS Nadir Ozone Profile data (Posted 2/13/14)
        Readme for released S-NPP OMPS Ozone Total Column EDR and OMPS Nadir Total Column Ozone First Guess (Posted 8/20/14)
        Readme for released S-NPP OMPS SDR data (Posted 12/16/13)
    Published:   2014-02-13 19:30:00.0

      VIIRS:

        Readme for released S-NPP VIIRS Active Fires ARP data (2/13/14)
        Readme for released S-NPP VIIRS Aerosol Optical Thickness (AOT) EDR data
        Readme for released S-NPP VIIRS Cloud Mask IP data (1/6/15)
        Readme for released S-NPP VIIRS Cloud Products Status Report (1/6/15)
        Readme for released S-NPP VIIRS Ice Concentration IP
        Readme for released S-NPP VIIRS Ice Surface Temperature EDR (2/13/14)
        Readme for released S-NPP VIIRS Land Surface Temperature EDR (1/6/15)
        Readme for released S-NPP VIIRS Near Constant Contrast (NCC) EDR Ground Track Mercator (GTM) Geolocation and VIIRS Near Constant Contrast Imagery EDR (1/6/15)
        Readme for released S-NPP VIIRS Non-NCC Imagery EDR data (1/6/15)
        Readme for released S-NPP VIIRS Ocean Color/Chlorophyll EDR
        Readme for released S-NPP VIIRS SDR data (1/6/15)
        Readme for released S-NPP VIIRS Sea Ice Characterization EDR (2/13/14)
        Readme for released S-NPP VIIRS Sea Surface Temperature EDR (1/6/15)
        Readme for released S-NPP VIIRS Snow Cover EDR Products (2/13/14)
        Readme for released S-NPP VIIRS Surface Reflectance (1/6/15)
        Readme for released S-NPP VIIRS Surface Type EDR
        Readme for released S-NPP VIIRS Suspended Matter EDR
        Readme for released S-NPP VIIRS Veg Index EDR
    Published:   2014-02-13 19:30:00.0

      CrIMSS:

        Readme for released S-NPP CrIMSS EDR data (Posted 2/13/14)
    Published:   2014-02-13 19:30:00.0

    Attention CLASS USERS:
    CLASS NGDC www.class.ngdc.noaa.gov and ftp://ftp.bou.class.noaa.gov/ will be off-line for maintenance starting 1/25/2014 0000 UTC and possibly lasting until 1/26/2014 0400 UTC. However, you can place orders under www.class.noaa.gov. If you have any questions please email CLASS Help Desk.
    Published:   2014-01-23 19:22:06.0

    :
    Due to maintenance work at CLASS NCDC (www.class.ncdc.noaa.gov) certain NESDIS products will not be available for several weeks. However, these products are available through www.class.ngdc.noaa.gov or www.nsof.class.noaa.gov . Products affected are Aerosol 100 KM Global, SST 100 KM Global, SST 50 KM Global, SST 14 km Regional, AVHRR PathFinder, and the EDRMAP datasets. If you have any questions please email CLASS Help Desk.
    Published:   2014-01-21 22:20:06.0

    Attention Suomi NPP Users:
    The most recent global NPP operational products are now available in daily tar files for quick and easy downloads at: ftp://ftp-npp.bou.class.noaa.gov/. Please see the NPP help page for instructions. Up to the most recent 85 days of data will be available for direct online access.
    Published:   2014-01-13 16:41:02.0

      CrIS:

        Readme for released S-NPP CrIS SDR data (1/6/15)
    Published:   2013-12-16 19:45:01.0

    Suomi NPP data access status (11/25/14):
    The majority of S-NPP products are now available and can be ordered through CLASS. The ones available to the public will show the begin dates after the product name on the search page. Also, a "quick look" of which products are at which maturity stages can be easily viewed at the STAR Algorithm Product Maturity Matrix website. Details of high priority issues related to the data quality are contained in the Readme files provided by the S-NPP Project Scientist. Many of these have recently been updated. Please read these before ordering and using the data.
    Published:   2013-12-16 19:45:01.0

    Attention SST users:
    Under the product listing "GOESSST", the data type "Blended SST 11-km Daily Products" has been retired on October 21, 2013. Please use the Blended SST 5-km Daily and Night Products from there on.
    Published:   2013-10-22 10:30:00.0

    Attention CLASS users:
    During the US government shutdown 10/1/13-10/17/13, CLASS continued to ingest and archive data from all data providers. This data is available for ordering from the CLASS web site. The ftp://ftp-npp.bou.class.noaa.gov/ site was updated daily and can be used for downloading NPP data. Please see the NPP help page for instructions. Please submit questions to CLASS Help Desk.
    Published:   2013-10-18 09:00:00.0

    Attention CLASS users:
    On September 19, 2013, one of the CLASS sites has changed an IP address for ftp.class.ncdc.noaa.gov from 152.53.15.180 to 204.62.251.180. If you have firewall rules including this IP address, please update them accordingly. If you have questions, please contact class.help@noaa.gov
    Published:   2013-09-20 09:00:00.0

    CLASS will be unavailable 9/24/2013 from 1300-1900 UTC (9AM-3PM EDT):
    On September 24, 2013, from 1300-1900 UTC (9AM-3PM EDT) CLASS will be conducting a system-wide maintenance, which will require all CLASS web services and subscription services to be off-line during the planned 6 hour maintenance window. However, ftp access to completed orders will still be available to users. If you have any questions, please contact CLASS Help Desk
    Published:   2013-09-17 18:59:41.0

    Attention CORS users (07/2013):
    The National Geodetic Survey's CORS data archived at the National Geophysical Data Center has been transitioned into CLASS. The data collections include RINEX since 1994 and raw GPS from selected CORS sites since 2004. The original at-sampling rate was retained except where there was only the 30-second decimated rate data. For more info see the CORS CLASS search page.
    Published:   2013-07-23 15:03:25.0

      ATMS:

        Readme for released S-NPP ATMS SDR data (1/6/15)
    Published:   2013-03-28 19:30:00.0

      Reminder:
        The most recent global NPP operational products are now available in daily tar files for quick and easy downloads at: ftp://ftp-npp.bou.class.noaa.gov/.
    Published:   2013-03-28 19:30:00.0

    Attention Metop users (08/14/2013):
    With the exception of GOME Level 2 data, all Metop-B level 1b and 1c satellite data is now available beginning January 15, 2013 (IASI L1c starts on May 16, 2013). Pre-operational data collected prior to those dates remains restricted. Please contact the CLASS Help Desk if assistance is needed.

    Metop-A Outgoing Longwave Radiation dataset is now available since July 31, 2013.
    Published:   2013-01-15 13:38:41.0

    Attention CLASS USERS:
    CLASS will upgrade its system to version 6.0 on July 10, from 1400 UTC - 1800 UTC. During this time CLASS web sites and ftp delivery areas will not be available and orders will not be processed.
    Published:   2012-07-03 14:55:00.0

    Tutorial for ordering Suomi NPP data in CLASS:
    A tutorial for ordering data through CLASS can be found at Data Access. The tutorial references Suomi NPP data but is applicable to all data types. If you have any questions please email CLASS Help Desk.
    Published:   2012-05-05 07:17:16.0