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The next IPR related to Ground Support Equipment (GSE), which regularly has minor leaks during the pad flow. This issue \u2013 associated with the LH2 Tail Service Mast (TSM) \u2013 was already in the process of being cleared by the time it made IPR 51.<\/p>\n
\u201cIPR 51 taken by MPS (Main Propulsion System): To document a helium leak in the LH2 TSM,\u201d added the processing report. \u201cLaunch Accessories changed out a union and nose seal, performed a nominal leak check, and continued closing out the TSM.\u201d<\/p>\n
Listed as a constraint to coming out of the T-9 minute hold, IPR 52 related to a control system associated with 78 pad and MLP (Mobile Launch Platform) cameras.<\/p>\n
![\"A2\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2009\/11\/A217.jpg\" "\\"A2\\"")
Although this IPR was no fault of Atlantis, the requirement to document every angle of her launch is vital\/ Thankfully, control was re-established, allowing this constraint to be filed to paperwork for post launch assessments.<\/p>\nSpaceflight history books
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\u201cIPR 52: During surveillance, the Photo Optical Control Systems (POCS) A and B locked up and lost ability to control film cameras located at Pad-A and the MLP. POCS controls 78 cameras throughout the LC39 area.<\/p>\n
\u201cTrouble shooting consisted of performing a power cycle to the control system. Control was re-established and is currently being monitored. This has been a very stable system and this failure is not known to have occurred before. Constraint: S0007.200 Step 16-1157.<\/p>\n
The two remaining constraints were also cleared in plenty of time to avoid any need for discussion at final Mission Management Team (MMT) meeting during the 45 minute built in hold \u2013 the first relating to an middeck payload connection, while the second was associated with the Merritt Island Launch Annex (MILA) communication systems.<\/p>\n
\u201cIPR 54 to PTC (Payloads): During the IVT for middeck payload, CB5 on Panel M063P was closed in lieu of CB4. CDR verified that there was nothing mated to J5 on the Panel. Payloads turned off power to the experiment prior to repositioning closing the correct CB,\u201d added the NTD report.<\/p>\n
\u201cIPR-53: During Comm Activation, the C+T lab was unable to lock on to engine data. MILA was able to lock to the vehicle FM downlink and RPS was able to successfully frame sync the data from all three Main Engine sub-carriers satisfying the OMRS (Operational Maintenance Requirements and Specifications) requirement.<\/p>\n
STS-129 Specific Articles: http:\/\/www.nasaspaceflight.com\/tag\/sts-129\/<\/p>\n
\u201cThis indicates there is no problem with the vehicle FM system and no further vehicle troubleshooting is required. The C&T station is a non-critical system used as an independent monitor to support launch activities. There is no OMRS requirement for the C&T Lab to provide FM deviation data during S0007.200. This item will be transferred to a PR (Problem Report).\u201d<\/p>\n
![\"A4\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2009\/11\/A49.jpg\" "\\"A4\\"")
The only real issue that required engineering discussions during the latter part of the count was the noise on Fuel Cell 2\u2019s H2 pump, with an indication that may have been indicative of dropping a phase for some unknown reason.<\/p>\nWith a similar condition was noticed on Atlantis during her previous mission \u2013 STS-125 \u2013 the issue was put down to the instrumentation that is very sensitive to AC phase adjustments associated with items such as the brightness of the orbiter\u2019s cabin lights.<\/p>\n
As expected, all three Fuel Cells performed nominally during Atlantis\u2019 ascent.<\/p>\n
Flight Day 2 \u2013 TPS Surveys:<\/p>\n
With the handheld photography and ET Umbilical Well imagery in the process of being downloaded to the ground for the Damage Assessment Team (DAT) to begin their evaluations into any foam liberation events, FD2 will take a first look at the health of Atlantis\u2019 heatshield.<\/p>\n
![\"A3\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2009\/11\/A312.jpg\" "\\"A3\\"")
Shortly after reaching orbit on Monday evening, Atlantis\u2019 Payload Bay Doors were opened, followed by the deployment of her Ku-band antenna. Atlantis\u2019 Remote Manipulator System (RMS) was also activated ahead of Flight Day 2\u2019s inspections, along with initial post-launch checkouts.<\/p>\nWith the NC2 and NC3 Rendezvous burns planned into the flight day, the main role for the crew will be the unberthing of the Orbiter Boom Sensor System (OBSS) via the RMS, in order to carry out surveys of Atlantis\u2019 wing and nose cap, before heading to the OMS Pods to check for any tile damage or protruding blankets.<\/p>\n
\u201cTPS Surveys: All RCC (Reinforced Carbon Carbon) is inspected during the OBSS Starboard Wing, Nose Cap, and Port Wing surveys. The two wing surveys also cover most of the areas of the crew cabin. The OMS Pod is inspected using a handheld camera to take pictures from the aft flight deck windows,\u201d noted Flight Readiness Review (FRR) mission outline documentation (L2).<\/p>\n
\u201cThe OBSS survey procedures incorporate the use of supplemental IDC (Digital Camera) images during LDRI (Laser Dynamic Range Imager) scans, thus reducing the likelihood of needing Focused Inspection. The OBSS unberth procedure incorporates the LDRI 3D calibration and the starboard survey the flat field calibration.<\/p>\n
Three crewmembers are required continuously during the surveys, two for the SRMS\/OBSS ops and one to operate the situational awareness cameras and sensors. Only two crewmembers are required during unberthing and berthing operations (non-laser ops).<\/p>\n
![\"A5\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2009\/11\/A55.jpg\" "\\"A5\\"")
Scans of the entire starboard wing are not easily performed, or are impossible to perform while docked, which results in those areas being scheduled first. The surveys are scheduled to continue through the night passes, but the crew may elect to pause if the night time visuals are not sufficient.<\/p>\n\u201cThe LDRI survey attitude requires no sun within a +\/-20 degree field of view (FOV) of the laser bore-sight. Additionally, no sun can be within a 10 degree half-cone directly behind the instrument; however it is highly desired to keep the sun at a 90 degree half cone behind the instrument as long as it\u2019s not directly behind.\u201d<\/p>\n
Although Flight Day 3\u2019s RPM (Rbar Pitch Maneuver) \u2013 carried out \u201cunderneath\u201d the ISS ahead of docking \u2013 will provide a near-complete overview of Discovery\u2019s heatshield, the OBSS inspections will give the opening insights into the extent of any damage sustained during the ride uphill.<\/p>\n
The key focus will be on the External Tank (ET-133), especially the Ice Frost Ramps (IFRs) \u2013 with the LO2 ramps also being filmed from a minicam on the flight deck during Atlantis\u2019 ascent. Foam losses from the tank can usually be a baseline for tracking where and when they may of impacted on the orbiter.<\/p>\n
Based on the initial data, no \u201cmajor\u201d foam loss events have been observed \u2013 with only three events, all occurring after the time period where they can be a damage threat to an orbiter. However, a lot of work is required to study each element of camera, radar and onboard camera footage, usually taking several days to collate.<\/p>\n
L2 members<\/em><\/em>: Documentation \u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, now over 4000 gbs in size.<\/em><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"
Only three minor foam liberation events have been noted in initial ascent imagery evaluations, with External Tank ET-133 appearing to perform extremely well during launch. Further checks will take place via Flight Day 2\u2019s opening Thermal Protection System (TPS) inspections which utilize the orbiter\u2019s robotic arms for the first time during STS-129. Countdown review: Atlantis […]<\/p>\n","protected":false},"author":1,"featured_media":0,"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":[9199,7935],"class_list":["post-40936","post","type-post","status-publish","format-standard","hentry","category-news","tag-sts-129","tag-tps"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40936"}],"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=40936"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40936\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=40936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=40936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=40936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}