(Space Environment Applications Systems and Operations for National Security)

Join your colleagues from the military, government, university, commercial, and contractor sectors with an interest and stake in the space environment. The purpose of this conference is to discuss the impacts of space weather on DoD and intelligence community (IC) systems, and the applications and requirements for space-weather sensors and algorithms to mitigate these impacts and enhance operations.

This year's theme will be "Space Weather and the Space Warfighting Domain" and will focus on evolving space weather threats to operational assets and how the space environment could be exploited for operational advantage. Join us to explore how new tools and mitigation strategies can be applied to improve operational outcomes despite space weather hazards.

SEASONS will return to an in-person format in 2021 and will be hosted on the JHU/APL campus in Laurel, Maryland. The first day of the conference (November 2nd) will have unclassified presentations releasable to the public and will be broadcast on Webinar for those unable to attend in person. The second day (November 3rd) will have classified sessions and the third day (November 4th) will have a half-day of highly classified sessions. Further details will be posted on this site when available.

In-person registrants should be aware that beginning October 1, APL will be requiring visitors to show proof of vaccination or a negative COVID-19 test result from within 72 hours before being granted access to APL facilities. We will continue to monitor the COVID-19 situation, and will send additional details on visitor requirements closer to the conference date. Current visitor information can always be found at

Citizenship Verification

Instructions for sending SCI accesses to JHU/APL

To arrange for a visit to the Johns Hopkins University Applied Physics Laboratory (JHU/APL), the visitor's facility security office should provide the subsequent information on organizational letterhead verifying that the visitor holds a DoD security clearance or has had a background investigation. The letter should be sent at least 5 days in advance of the visit and include the info included in this document.

Unescorted Visits and Badging Requirements - U.S. Citizens Only

As a Laboratory engaged in classified Department of Defense (DoD) programs, we are obligated and required to have procedures and controls in place to safeguard all classified technical information. This memo describes the policies in effect for unescorted visitors to the Laboratory (JHU/APL).

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October 8
Abstract acceptance notifications

October 15
Early registration deadline ($15 one-day virtual, $175 full in-person)

October 29
Online registration deadline

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The Johns Hopkins Applied Physics Laboratory, our nation’s largest university affiliated research center, has served the U.S. government as a world-class resource of innovative space science, defense, and engineering for more than 75 years. Through technology research and development, systems engineering and integration, and analysis, Johns Hopkins APL provides critical contributions to critical challenges in air and missile defense, asymmetric operations, force projection, and space exploration. An institution proud of its long history of end-to-end execution of NASA, DoD, and Intelligence Community missions, APL has designed and built 70 spacecraft and over 300 specialized instruments that have been key to expanding humankind’s understanding of the universe and shaping the next era of national security in space.

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