Request for Proposals Letter Call 004 Published

AIR FORCE RESEARCH LABORATORY SPACE WARFARE DIRECTORATE FORMALLY KNOWN AS SPACE

VEHICLES DIRECTORATE SPACE ENVIRONMENT TECHNOLOGIES AND SCIENCE (SETS) PROGRAM

BROAD AGENCY ANNOUNCEMENT (BAA)

FA9453-26-R-X012

CALL ANNOUNCEMENT-- CALL 004

Transition and Advancement of Innovative Real-time HF Propagation Modeling and Ionospheric Simulation Capabilities

30 September 2026

NAICS CODE: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

PSC CODE: AC12

FEDERAL AGENCY NAME: Air Force Research Laboratory (AFRL) Space Warfare Directorate (RJ) formally known as Space Vehicles Directorate (RV) Geospace Technologies Division (RJB) Geospace Environment Impacts and Applications Branch (RJBX)

BROAD AGENCY ANNOUNCEMENT NUMBER: FA9453-23-R-X001

BROAD AGENCY ANNOUNCEMENT TITLE: Space Environment Technologies and Science (SETS) Program

CALL ANNOUNCEMENT (CALL) NUMBER: 004

CALL TITLE: Transition and Advancement of Innovative Real-time HF Propagation Modeling and Ionospheric Simulation Capabilities
CALL TYPE: Closed- One Step
TECHNICAL AREA: 1) Solar, Solar Wind, and Ionospheric Effects DUE DATE AND TIME: 13 November 2026,1:00 p.m. Mountain Daylight Time APPLICABILITY OF BASELINE BAA: All requirements of FA9453-23-R-X001 apply unless specifically amended and addressed in this Call. For complete information regarding FA9453-23-R-X001, refer to the initial FULL TEXT Closed BAA. It contains information applicable to all Calls issued under the BAA and provides information on the overall program, proposal preparation and submission requirements, proposal review and evaluation criteria, award administration, agency contacts, etc. For any discrepancies, please contact the contracting officer as soon as possible. Initial FULL TEXT Closed BAA link:
https://sam.gov/workspace/contract/opp/ab7bd439fe1c456489ad90421a21a5ba/view I.

REQUIREMENT INFORMATION:

A. BACKGROUND: The Air Force Research Laboratory (AFRL) Space Warfare Directorate (RJ) formally known as Space Vehicles Directorate (RV) Geospace Technologies Division (RJB) Geospace Environment Impacts and Applications Branch (RJBX) seeks sources capable of supporting the program’s fundamental and advanced research in space and environmental impacts technologies. Additionally, the program is interested in understanding and quantifying the impact of the space environment on Department of Defense and National Security Systems and in achieving a capability to specify, predict, mitigate, and exploit the effects of the space