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While the data pack is obviously restricted from public view, notes released to L2\u2019s rolling SLS PDR Update Section provide a level of insight into the status of the element reviews that will be combined into the Board meeting at the end of this month.<\/p>\n
The approval to proceed from the element PDRs also provides the green light to push the hardware into preparations for 2015\u2019s Critical Design Review (CDR).<\/p>\n
One such example of the status from the review comes from the completed Spacecraft and Payload Integration Office (SPIO) Element PDR that was held in Huntsville, Alabama, at the Jackson Center.<\/p>\n
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![\"SPIO](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2013\/07\/ISPE2.jpg\" "\\"SPIO")
This board determined the SPIO Element range \u2013 the ICPS (Interim Cryogenic Propulsion Stage), MSA (MPCV to Stage Adapter) and LVSA (Launch Vehicle to Stage Adapter) \u2013 preliminary designs meet system requirements with acceptable risk and concurred with pressing toward CDR.<\/p>\n\u201cThere were eight success criteria<\/p>\n
winstrol cycle<\/p>\n
evaluated, two were found to be green and six were yellow,\u201d added the notes (L2).<\/p>\n
\u201cAlthough the ICPS stage is \u2018heritage\u2019 \u2013 less the LH2 tank stretch \u2013 the majority of the criteria were rated yellow by both the Pre-Board and the Board due to the need for further definition of interfaces, abort requirements, mitigation of RL-10B2 service life issue \u2013 most likely by re-certifying to work beyond their already approved shelf life.<\/p>\n
\u201cFurther safety assessment of pre-declared RIDs (Review Item Discrepancies) required, and contracts still needing to be put in place. Overall, SLS\/SPIO received 277 \u2018pre-RIDS\u2019 and accepted 110 as RIDs.\u201d<\/p>\n
![\"Latest](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2013\/07\/Z39.jpg\" "\\"Latest")
Another example of an element level review related to the Kennedy Space Center (KSC) the Ground Systems Development and Operations (GSDO) Program office, which added no significant issues had been identified during its review.<\/p>\n\u201cGSDO\/KSC received 90 comments during the review, and submitted 16 to SLS as Pre-RIDs,\u201d the notes continued. \u201cPre-RIDs that were submitted by GSDO to the PDR Board focused mainly on the Fill and Drain Value operation during chill-down, Flight Termination requirements, Software\/Avionics, and test plans.<\/p>\n
Click here for SLS News Articles: http:\/\/www.nasaspaceflight.com\/tag\/hlv\/<\/p>\n
\u201cSome minor issues \u2013 such as absence of referenced bulkheads and incorrectly referenced figures \u2013 were also submitted. The remaining comments were withdrawn or forwarded to the book managers as editorial.\u201d<\/p>\n
![\"SLS](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2013\/07\/Z83.jpg\" "\\"SLS")
With the completion of all Element Level reviews, the main PDR remains on schedule to take place at the end of the month.<\/p>\n\u201cThis successfully completes all SLS Element level PDRs. We are currently (ready to) support the program level SLS PDR,\u201d concluded the notes.<\/p>\n
\u201cThose boards will occur later in July, with the SLS PDR Pre-Board taking place July 24-25, followed by the Board PDR on July 31.\u201d<\/p>\n
While the hardware continues to avoid major issues, the use of the vehicle remains at the mercy of mission planners and politicians.<\/p>\n
Only the opening two missions of the HLV have been officially outlined, both of which are large-scale changes to their original plans.<\/p>\n
![\"The](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2013\/07\/Z411.jpg\" "\\"The")
Exploration Mission -1 (EM-1) is currently under an official Change Request (CR) to realign it to a Distant Retrograde Orbit (DRO) mission \u2013 resulting in Orion being sent 70,000 km past the Moon on a 25 day flight.<\/p>\nThe previous plan for what is ultimately the debut test flight of the SLS was to send Orion on a 10 day mission to high-lunar orbit to evaluate the fully integrated Orion and SLS system.<\/p>\n
\u201cWe sent Apollo around the moon before we landed on it and tested the space shuttle\u2019s landing performance before it ever returned from space.\u201d said Dan Dumbacher, NASA\u2019s deputy associate administrator for exploration systems development.<\/p>\n
\u201cWe\u2019ve always planned for EM-1 to serve as the first test of SLS and Orion together and as a critical step in preparing for crewed flights. This change still gives us that opportunity and also gives us a chance to test operations planning ahead of our mission to a relocated asteroid.\u201d<\/p>\n
![\"EM-2](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2013\/07\/Z951.jpg\" "\\"EM-2")
Exploration Mission -2 (EM-2) had already been re-baselined from a crewed version of the old EM-1 into the Asteroid Redirect Crewed Mission (ARCM), based around a 2019 mission tasked with hunting down and capturing an asteroid that would then be placed in the vicinity of the Moon within one to two years, ahead of the launch of two astronauts to meet up and conduct EVAs on the asteroid.<\/p>\nThe missions that will follow are currently under evaluation, with the potential of a major science mission utilizing the final Block 1 SLS \u2013 per L2 notes.<\/p>\n
The Block 1A \u2013 the 105mt version of the HLV \u2013 would then open up the ability to conduct numerous Design Reference Mission (DRM) options, ranging from deep space Near Earth Asteroid (NEAs) and even Lunar Surface missions, should lawmakers re-direct NASA\u2019s future plans.<\/p>\n
Several SLS\/Orion DRM overviews, based around the new \u2013 and highly detailed \u2013 116 page Concept Of Operations (CONOPS) document (available to download in L2) will be published over the coming weeks.<\/p>\n
(Images: Via L2 content from L2\u2019s SLS specific L2 section, which includes, presentations, videos, graphics and internal \u2013 interactive with actual SLS engineers \u2013 updates on the SLS and HLV, available on no other site. Other images via NASA)<\/p>\n
(L2 is \u2013 as it has been for the past several years \u2013 providing full exclusive SLS and Exploration Planning coverage. To join L2, click here: http:\/\/www.nasaspaceflight.com\/l2\/)<\/p>\n","protected":false},"excerpt":{"rendered":"
The Space Launch System (SLS) is expected to pass its Preliminary Design Review (PDR) when the NASA Board meets on July 31. All \u201cElement Level\u201d PDRs have now been completed, ahead of the summit meeting, with zero \u201cRed Risks\u201d found with NASA\u2019s new Heavy Lift Launch Vehicle (HLV). SLS Progress: In what is a major […]<\/p>\n","protected":false},"author":1,"featured_media":30316,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[9034,640,9106,624],"class_list":["post-39809","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-hlv","tag-orion","tag-pdr","tag-sls"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/39809"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=39809"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/39809\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media\/30316"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=39809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=39809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=39809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}