Dear SEES Users, The Advanced Photon Source (APS) has opened the General User Proposal (GUP) call for the 2025-1 run cycle with a deadline of October 25. APS has also opened a Rapid Access Proposal (RAP) call for 2024-3. All SEES beamlines at the APS (3-ID, 6-BM, and all Sector 13 beamlines) will participate in both the 2025-1 GUP and 2024-3 RAP calls. The NSF SEES beamlines and techniques will come online for user experiments at different times as they become ready over the coming months. The APS-U storage ring itself is still undergoing commissioning activities. We're excited to welcome users back to conduct early experiments in 2024-3 and 2025-1. These represent critical steps in commissioning the capabilities of the new facility and beamlines. This time period will likely entail a higher probability of lost user beamtime due to issues encountered with the storage ring or the beamline components when compared with mature general user operations. More details about the beamline commissioning process, return to user experiments, and status of individual SEES beamlines at the APS can be found at https://urldefense.us/v3/__https://seescience.org/aps-upgrade_status/__;!!G_... . If you would like to submit either a Rapid Access Proposal for 2024-3 or a General User Proposal for 2025-1, please visit https://urldefense.us/v3/__https://ups.servicenowservices.com/ups__;!!G_uCfs... . We encourage you to first contact the appropriate beamline scientist to discuss feasibility of your proposed research. Whether beamtime will be allocated for a particular proposal in 2024-3 or 2025-1 will depend on readiness of the instruments and optics required, in addition to numerical score. Users for whom we are able to allocate beamtime for the 2024-3 run (either through the prior GUP or the current RAP call) will be contacted about scheduling if and when the beamline/technique is ready. Beamtime for the 2025-1 run will be scheduled similarly for beamlines that are still commissioning at that time and via the APS scheduling system for beamlines that have transitioned to general user operations by then. Best regards, Mark Rivers, NSF SEES Chief Technology Officer