Minimize Swarm Data Access

In accordance with ESA Earth Observation Data Policy, all Swarm Level 1b and Level 2 products are freely available by FTP to ESA-EO registered users (Fast Registration Procedure).

Those users not having an ESA EO Single Sign-On (EO-SSO) account, should follow the Instructions for SSO Registration, and then log in to 'My EarthOnline'.

Once logged into ' My EarthOnline', the user should click 'Add ESA products'. In the 'Product Registration' page please select the 'Study Area', indicate the 'Primary Application Domain', insert a brief 'Executive Summary' and click 'Next'. In 'Add Products Registration' page, in 'ESA Products' section the user should select 'Swarm - All Swarm sensors - Validated Swarm L1b and L2 products', and then click 'Add Product'. Before proceeding please accept 'Terms and Conditions'. By clicking on the 'Save' button, the user will receive the credentials to access the FTP account within two days.

The new FTP top-level structure, effective since 11 November 2014, is divided into the 'Level1b', 'Level2daily', and 'L2longterm' directories. Within each directory, the structure presents first the 'Current' and 'Previous' folders, then a Simplified datatype list, and finally the satellite ID. if applicable. Please also notice that for each L1/L2 directory there will be a .txt file with the list of products available at that time in the corresponding directory tree.

You can find all of the details in the document 'Swarm PDGS Data Access User Manual', and it is key to note that:

CURRENT FOLDER: the user will find all the latest interoperable products in the 'Current' folder on the ESA FTP server. These data have been generated in a consistent way with the application of all significant data quality improvements.

PREVIOUS FOLDER: data no longer interoperable with the latest existing products are moved to the 'Previous' folder on the ESA FTP server. Such data is identified with an older Product Baseline number.

N.B. This strategy ensures that users do not mix old data with new products that have been improved in quality by significant upgrades. It might occur that not all of the old data is immediately regenerated or reprocessed into the Current Folder. Therefore if the user does not find the improved product in the Current Folder but s/he is nonetheless interested in accessing the data without the significant data quality improvements, s/he can find them in the Previous Folder.

Please refer to the Data Quality page to check the Product Baselines details of the 'Current' and 'Previous' Level 1b and Level 2 Cat-2 Datasets.

PRODUCT BASELINE: is a number associated to a specific product type and satellite. The Product Baseline is identified by the first two of the four digits placed at the end of the file name, i.e. the first two digits of the File_Version field represent the Product Baseline, while the last two represent an incremental File Counter.

SW_OPER_STRCATT_1B_20140218T000000_20140218T235959_0301_MDR_SAT_AT.cdf Where 03 is the Product Baseline number, while 01 is only an incremental File Counter.

The Product Baseline is increased when upgrades lead to significant improvements in the data quality of the related products. This subsequently leads to a reprocessing of the affected product types. Data with previous Product Baseline are moved into the Previous Folder. Products with an older File Counter but same Product Baseline are erased, with few exceptions documented in the Swarm Data Quality page.

Temporarily, in addition to the 'Current' folder, a preliminary set of Swarm plasma data for all three spacecraft is available on the ESA FTP server accessible by all users, here:

Log in with your username and password, and go to:

The relative technical note can be found here and also on the FTP server: ~/Advanced/Provisional_Plasma_dataset/SWAM-GSEG-EOPG-TN-15-0003_Plasma_Dataset_User_Note.ZIP

In case of any problem, doubts, or questions, please contact EO Helpdesk.