Boeing continues to study early exploration Deep Space Gateway (DSG) based architectures that provide foundational technical capabilities while addressing NASA's exploration goals. DSG-based architectures use the capabilities of the SLS for heavy lift and Orion for crew transport, which includes the native capability to deliver a 10 metric ton element to cislunar space in a single launch co-manifested with an Orion. The Boeing architectures seek to take maximum advantage of these capabilities to provide human presence all through the proving ground period of exploration. This paper includes a description of the results of Boeing's study to leverage the DSG to include more lunar surface exploration within the cislunar architecture with special focus on lunar landers. The paper then extends DSG architecture to a logically derived Mars architecture. The Mars architecture heavily leverages capabilities and technologies develop and proven at ISS and cislunar vicinity. The initial conclusions from this study are that an incremental, extensible and enduring exploration architecture based on using the DSG as an access point for both lunar and mars objectives are both feasible and affordable.
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