Micro-X Sounding Rocket Payload Re-flight Progress

Micro-X is an X-ray sounding rocket payload that had its first flight on July 22, 2018. The goals of the were to operate a transition edge sensor (TES) microcalorimeter array in space and take high-resolution spectrum Cassiopeia A supernova remnant. was considered partial success. time-division multiplexing readout system successfully operated space, but due failure attitude control system, no time on-target acquired. re-flight has been scheduled for summer 2022. Since flight, modifications have made detector systems improve noise reduce susceptibility magnetic fields. three-stage SQUID circuit, NIST MUX06a, replaced by two-stage MUX18b. initial laboratory results new will be presented this paper.