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Some level of troubleshooting was worked on the Flash Evaporator System (FES), which will control Atlantis\u2019 temperatures after the Payload Bay Doors (PLBDs) are closed, removing the radiator\u2019s ability to cool electronics and other systems on the orbiter. This issue was soon resolved, allowing for the closure of the PLBDs.<\/p>\n
It\u2019s been a smooth couple of days since undocking from the International Space Station (ISS), with Late Inspections enjoying a nominal survey \u2013 following the EVA work to free the Pan Tilt\/Unit (PTU) on the Orbiter Boom Sensor System (OBSS).<\/p>\n
With the Damage Assessment Team (DAT) working on both imagery and data taken during the inspections early in the mission \u2013 and the completion of coverage that had been missed via the lack of ability to angle the Laser Dynamic Range Imager (LDRI) over parts of the Wing Leading Edges (WLE) \u2013 engineers took just over a day to work through the hours of footage.<\/p>\n
![\"\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2010\/05\/A319.jpg\" "\\"A3\\"")
The results of the Late Inspections showed an extremely clean Atlantis, and a good argument for her being classed as the cleanest orbiter in at least recent history, with only 252 ROIs (Regions Of Interest) \u2013 areas that need any checks, such as scuffs and stains \u2013 a number which is the lowest since the use of the OBSS, and nearly half the number observed on STS-131.<\/p>\n\u201cLESS\/RCC team cleared all late inspection regions of interest. Level 1 review by PRT completed at 5:00 pm (5-24). Level 2 completed at 1:00 am. Final PRT Review completed at 6:52 am (5-25),\u201d noted the DAT findings presentation (L2). \u201cNo ROI exhibited any damage characteristics. From all of the early\/late inspection LDRI imagery LESS PRT is GO for entry.\u201d<\/p>\n
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The robotic duo responsible for the survey \u2013 the OBSS on the end of the SRMS (Shuttle Remote Manipulator System) \u2013 were successfully reberthed in the Payload Bay for the return home, marking the end of their operations for the mission.<\/p>\n
![\"\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2010\/05\/A261.jpg\" "\\"A26\\"")
\u201cOn FD 11 (Flight Day 11), the OBSS and RMS were successfully berthed, latched, and stowed and are in a good configuration for payload bay door closure, entry, and landing,\u201d noted the Mission Evaluation Room (MER) report on L2.<\/p>\n\u201cOBSS BERTH and MRL LATCH. Did not receive the Aft MRL Latch 2 indication (known condition), no further action required. All other indications nominal. Good single motor drive time RMS BERTH and MRL LATCH \u2013 All indications nominal, good dual motor drive time.<\/p>\n
\u201cRMS MPM STOW \u2013 All indications nominal, good dual motor drive time. OBSS MPM STOW \u2013 All indications nominal, good dual motor drive time. The OBSS was stowed on the Stbd MPM by the SRMS. RMS Cradled and powered-down.\u201d<\/p>\n
Flight Day 12 involved checks to Atlantis Flight Control Surfaces (FCS), ahead of their use during Atlantis dive back into the atmosphere \u2013 which was successful from a hardware standpoint.<\/p>\n
\u201cFCS C\/O (Check Out): All APU 1 (Auxiliary Power Unit) parameters were nominal during the FCS checkout run. APU 1 run time and fuel consumption are listed below,\u201d added the MER report. \u201cStart time: 145\/07:47:03. Stop time: 145\/07:45:21. Run time: 3:18. Fuel Used\/Rate: 12 lbs; 3.64 lb\/min.<\/p>\n
\u201cFD12 Performance: All APU parameters are nominal. All APU heaters are functioning nominally on the \u2018B\u2019 string. The GG heater lower set point shift \u2013 unique to OV-104 (Atlantis) position #1 since STS-81 \u2013 is evident after about six \u0091B\u0092 heater cycles, exactly the same as on the previous OV-104 mission, STS-129 (31). This heater signature was expected and will be noted in the MER trending database.\u201d<\/p>\n
STS-132 Specific Articles: http:\/\/www.nasaspaceflight.com\/tag\/sts-132\/<\/p>\n
During the FCS checks, Atlantis\u2019 elevons and Rudder Speed Brake (RSB) were put through their paces, ahead of their use for landing, via the use of hydraulic actuators and valves.<\/p>\n
\u201cAll Elevon Actuator Switching Valves and the RSB PDU Switching Valve were verified to configure to the proper positions (All Elevon Switching Valves to Standby 1 & the RSB PDU Switching Valve in Primary). Priority valve cracking time was 0.393 seconds (spec \u22641 sec). The HYD System #1 bootstrap accumulator was 2336 psia prior APU #1 start and re-seat pressure was approximately 2832 psia (spec: GT 2675 psia).\u201d<\/p>\n
![\"\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2010\/05\/A418.jpg\" "\\"A4\\"")
The Mission Management Team (MMT) were also presented with imagery analysis of what appears to be two Foreign Object Debris (FOD) leaving Atlantis during the FCS C\/Os.<\/p>\n\u201c(Object 1): Object estimated size: 0.46\u201d. Appears to from bottom of FOV (Field Of View \u2013 assumed to emerge from inside Payload Bay). Distance from Camera B to sill of payload bay is 32 inches. 32 inch range (max) estimated to object. No extensive dynamic analysis produced,\u201d noted a MMT presentation (L2).<\/p>\n
\u201cObject estimated size: 0.44\u201d \u2013 Does not emerge into provided FOV from bottom, so there is not evidence as with the other FOD that it emerged from the PLB. However, it is first seen against the wing background (i.e. it\u2019s much closer than the wingtip on first appearance. Estimate above assumes that it did come from PLB. 32 inch range (max) estimated to object.\u201d<\/p>\n
![\"\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2010\/05\/A519.jpg\" "\\"A5\\"")
Both objects appear to be similar, but have not been identified. However, no concerns were raised by the MMT, and such debris events can occur during the vibrations of FCS checkouts.<\/p>\n\u201cThe Flight Controls System Checkout was performed. The procedure was completed with nominal results. The team is not working any issues,\u201d confirmed the MER via their latest shift report, reviewing Flight Day 12\u2019s activities. \u201cMonitored FCS Checkout and RCS Hotfire. Two Foreign Object Debris (FOD) items were observed floating away from the Orbiter during FCS checkout.<\/p>\n
\u201cImagery personnel recorded video of the FODs, and did not feel that they would pose a threat to the Orbiter TPS, since they were small (<1\u2033), appeared to originate from the upper surface of the Orbiter and were floating away from the vehicle.\u201d<\/p>\n
Also included in the Flight Day 12 activities were the firing of Atlantis\u2019 Reaction Control System (RCS) thrusters \u2013 including the L3D thruster with its failed heater, successfully mitigated via a passive thermal mitigation plan.<\/p>\n
\u201c38 of 38 primary thrusters have been fired. Thirteen (13) new Primary thrusters were fired since previous report,\u201d noted the MER. \u201cAll thermal systems are performing nominally (except L3D thruster heater) and temperatures are within acceptable limits. The L3D temperatures are currently near 56F.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"
Shuttle Atlantis has managed to dodge unacceptable weather at her home port of the Kennedy Space Center (KSC) on Wednesday, taking the first of the two Florida landing opportunities, ending in a graceful landing. For what may of been her final day in space, Atlantis continued to be in great shape, with only the observation […]<\/p>\n","protected":false},"author":1,"featured_media":29568,"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":[9171,9197,3485,7935],"class_list":["post-40768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-dat","tag-mmt","tag-sts-132","tag-tps"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40768"}],"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=40768"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40768\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media\/29568"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=40768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=40768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=40768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}