Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

ASDC Past Maintenance Events

RSS Feeds - news, announcements, maintenance.

Past Maintenance


Date(s) Time Event Impact
Monday, June 18, 2018 to Saturday, June 30, 2018 06:00 am - TBD

ASDC_DAAC LARC Data Downloads: If you are experiencing failed orders or extended submissions, it may be a result of incompatible metadata or server issues. We are currently working on a resolution and do not have an estimate on when the issue will be resolved. Please access OPeNDAP ( for MISR, MOPITT, SAGE and TES products as an alternate method of data retrieval or contact us at for assistance. We apologize for the inconvenience.



Friday, May 4, 2018 TBD

NASA is eliminating the use of the FTP protocol for any external communications and replacing it with other file transport mechanisms (e.g., SFTP, https).  The timeframe for migrations varies per service.  In most cases, users of the new file transport mechanisms will be required to obtain an Earthdata Login account. Instructions to register for an Earthdata Login account are available at


Thursday, May 3, 2018 06:00 am - TBD

Unplanned maintenance is being performed on the Earthdata help desk ticketing system used by many of the Data Centers which is effecting our ability to respond to inquiries in a timely manner. Please contact us temporarily at if you have questions or unresolved tickets. We apologize for the inconvenience.


Tuesday, May 1, 2018 08:00 am - TBD EST

The ASDC is currently experiencing unplanned downtime effecting the inoperability of some websites, data ordering and subsetting tools.


Wednesday, April 25, 2018 08:00 am - 01:00 pm EST

The Data Pool, MISR order and browse tools, TAD, TES and MOPITT Search and Subset Applications will be unavailable from 8am - 1pm for scheduled maintenance. Data processing and distribution may be impacted during maintenance. We apologize for the inconvenience.


Wednesday, January 31, 2018 08:00 am - 1:00 pm ET

Connectivity to the EOSWeb site will be temporarily unavailable from 8 - 1pm ET

Friday, January 19, 2018 to Friday, January 26, 2018 01/19 @ 7 am - 01/26 @ 5 pm EDT

The ASDC would like to perform a comprehensive and required maintenance from Friday January 19, 2018 through Friday January 26, 2018 with preliminary work that may impact availability beginning as early as Thursday evening January 18th. Additionally, the ASDC network upgrade is planned for Friday January 19th, which will likely cause the network to be unavailable for a period of time. The dropbox will remain online during the maintenance activities. The ASDC will prioritize the maintenance activities in order to reduce the impacts to production and web hosting services.


Please expect unavailability of ASDC related websites, Order fulfillment, and the Data Ordering and Subsetting Tools:


- EOSWeb site

- ASDC HTML Ordering Tool

- DataPool FTP and OPeNDAP

- MISR Order and Customization Tool

- CALIPSO, CERES, MOPITT, TAD and TES Search and Subset Tools


While some sites and tools may be available early, you may experience a delay in order fulfillment. Please plan your data orders and activities accordingly. We apologize for any inconvenience.


Wednesday, January 10, 2018 09:00 am - 11:00 am EDT

Connectivity to the EOSWeb site will be temporarily unavailable from 9-11 am.


Wednesday, November 22, 2017 to Wednesday, December 13, 2017 End date is for banner display only.

The ASDC is experiencing unplanned downtime on certain websites that reside in the legacy web cluster. End date is for banner display only, it is not meant to suggest a completion date.

CALIPSO Expedited Images are Available on OPeNDAP


Please contact ASDC User Services with any questions or concerns.


Wednesday, November 22, 2017 to Tuesday, November 28, 2017 08:00 am - 01:00 pm