Subject: [SLR-Mail] No.2889: NanoFF-B: Request for ILRS Tracking Support (ILRS COSPAR ID 2318517, SIC:4206) From: Husson, Van (PERATON) Author: Debdeep Roychowdhury, TU Berlin Dear ILRS colleagues, Please find below the requested tracking plan for the NanoFF-B satellite from Technische Universität Berlin:  Detailed Tracking Plan for NanoFF-B (NORAD: 58755, ILRS COSPAR ID 2318517, SIC: 4206) (Updates will be provided to the network as needed)   Requested start date: on or after 29 September 2025 (tentatively) End date: 31 December 2025 (tentatively) Total requested tracking duration: ~50 hours   Low priority: 29 September - 12 October 2025 (5 hours) 1. Stations are requested to attempt tracking NanoFF-B at their convenient times/dates. 2. Purpose: verification of GNSS-based orbit determination (low-frequency GNSS) against SLR measurements. 3. Thruster maneuvers: Delta v up to 2 cm/s (~37 m mean semi-major axis change) every 3-4 days. Thruster maneuvers will be announced through the standard notification protocol and reflected in updated CPF prediction files. High priority: 13 October - 31 December 2025 (45 hours) 1.  Mission activities a) Satellite will be commanded to record GNSS data at higher frequency during these intervals, for later analysis. b) Raw GNSS data will also be recorded. c) The mission team understands that stations will track/observe the satellite whenever possible based on predictions.  This is subject to weather and other operational constraints. 2. In line with ILRS CB`s guidance, the mission will also issue SLRMail notifications (copied to ILRS CB). 3. No thruster maneuvers are planned. Differential drag will be used to control the relative along-track separation of the formation. Thank you very much. Regards, Debdeep Roychowdhury