Swarm DISC

Invitation To Tender

Extending Swarm TEC products with data from other LEO satellites

Swarm DISC ITT reference ID: SD-ITT-3.3

Open date:                2019-11-15
Closing deadline:      2020-01-31 12:00 GMT

This Invitation to Tender relates to the investigation of the upper atmosphere through the extension of the Swarm Total Electron Content (TEC) products with TEC data from GNSS receivers, or other radio sounding instrumentation, onboard other LEO satellites.

Tender Documents

Cover Letter
Statement of Work
Draft Subcontract
Special Conditions of Tender
Proposal template (word document)

Applicable and Reference Documents

Interfacing Control Document
Applicable Documents to Interfacing Control Document
Applicable Documents to Subcontract
Procurement procedure

Questions and Answers

Grant of Deadline Extension published 2019-12-17

Please observe that questions and answers or other updates may be published on this site at any time between the Tender open date and the submission deadline. If you intend to submit a tender, please visit this site regularly to check for updates. You may additionally subscribe to updates by registering for the Swarm DISC ITT notification newsletter (top right of this page).

Questions concerning the ITT shall be submitted in writing to the ITT e-mail or telefax as stated in the Cover Letter not later than ten (10) working days before the closing date. Questions should make specific reference to the appropriate section(s) of the ITT documents. Tenderers are asked to note that it is not possible to receive an immediate response to questions as each response published goes through an internal review process prior to it's publication.

This Invitation To Tender is published on behalf of ESA within the reference frame of ESA contract 4000109587, in accordance with the procurement procedure. Publication of this Invitation To Tender does not represent an obligation to issue a contract for the project.


Proposals or questions related to this ITT shall be submitted to:


The subject field of your e-mail must clearly identify the Swarm DISC ITT reference ID.

Note: The mailbox will generate an autoreply confirming arrival of your e-mail. If you do not receive confirmation within next business day that the content is readable, please submit your proposal or question via TELEFAX number: +45 4525 9701, clearly addressing the Fax to the Swarm DISC Project Office, marking the frontpage with ‘Confidential’ and the Swarm DISC ITT reference ID.