THE CONTRACTOR SHALL PROVIDE THE FOLLOWING HARDWARE TO MEET THE REQUIREMENTS OF THE NEUTRON STAR INTERIOR COMPOSITION EXPLORER PROJECT STAR TRACKER SYSTEM SPECIFICATION (EXP-NICER-SPEC-0007). A) ONE STAR TRACKER SYSTEM FLIGHT UNIT(S) B) ONE ETU SYSTEM THE STAR TRACKER SYSTEM INCLUDES THE DATA PROCESSING UNIT (DPU), CHU(S) WITH MIRU ADD-ON OR CHU-IRU(S), BAFFLE(S), AND SUPPORTING ELECTRICAL AND MECHANICAL HARDWARE. THE CONTRACTOR SHALL INCLUDE IN THE PROPOSAL THE COST TO PURCHASE ONE STAR TRACKER SYSTEMS AND ALL SUPPORTING HARDWARE. . THE ETU SYSTEM SHALL INCLUDE A DATA PROCESSING UNIT (DPU). THE ETU SYSTEM SHALL ALSO INCLUDE THE SAME NUMBER OF CHU COMBINED GYRO HEADS AS THE FLIGHT SYSTEM. THE UNIT LOANED TO THE PROJECT SHALL BE CONFIGURED TO BE MECHANICALLY AND THERMALLY IDENTICAL TO THE FLIGHT UNIT CONFIGURATION PER THE FLIGHT UNIT S MECHANICAL INTERFACE CONTROL DRAWING, MECHANICAL MACHINED PART DRAWINGS, THERMAL ANALYSIS AND STRUCTURAL ANALYSIS. NICER WILL PROVIDE THE DANISH TECHNICAL UNIVERSITY WITH DATA PRODUCED BY THE NICER STAR TRACKER SYSTEM AS PERMITTED BY ISS RESTRICTIONS AND REQUIREMENTS. IN EXCHANGE, DTU WILL PROVIDE A STAR TRACKER ETU FOR ONE YEAR.