This document outlines a federal solicitation for a Space Weather Next L1 Series Magnetometer. The National Aeronautics and Space Administration Goddard Space Flight Center and National Oceanic and Atmospheric Administration plan to issue a Request for Proposal for the design, development, fabrication, integration, testing, evaluation, launch support, ground support equipment maintenance, and mission operations for an instrument consisting of two tri-axial fluxgate magnetometers to measure the three components of the interplanetary magnetic field carried by the solar wind. Potential offerors are encouraged to review the solicitation and notify the agency of their intent to submit a proposal. The solicitation number is 80GSFC23R0037 and responses will be submitted through the website listed.