STS-119′s opening launch attempt has been scrubbed until Sunday, March 15,, following a LH2 leak during tanking. The leak related to a carrier plate that is attached to the intertank area of the ET, with attempts to cycle the associated valve to reduce the leak to acceptable proving to be unsuccessful.
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STS-119 is one day away from the opening launch attempt, with only a few issues of note are being worked on by engineers out at Pad 39A. One ealier issue that has been resolved related to the Seat Detailed Test Objective (DTO), which will gather information on Thrust Oscillation (TO) for Ares I. Meanwhile, two members [...]
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Engineers are currently working no serious issues with the Discovery, as the Mission Management Team (MMT) sailed through L-2 ahead of STS-119′s opening launch attempt on Wednesday. The main topic of conversation related to an issue with Discovery’s OMS (Orbital Maneuvering System) Engine Gimbal Controller during her previous flight, STS-124.
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Following the Flight Readiness Review (FRR) approval for launch, and the arrival of the STS-119 crew, Discovery has entered the launch countdown (S0007) at 7pm local time Sunday evening. The three day countdown is targeting a 9:20pm launch of Discovery on Wednesday evening.
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The Delta II launch team at the Cape Canaveral Air Force Station have launched NASA’s new Kepler observatory, a telescope designed to search for Earth-like terrestrial planets in the Cygnus and Lyra constellations. The initial three and half year mission launched at 10:49pm. EST from the Cape Canaveral Air Force Station in Florida.
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As expected, the Flight Readiness Review (FRR) has cleared Discovery to target a launch at 9:20pm on March 11, following a final review of the Flow Control Valve (FCV) flight rationale. One constraint – relating to the left SRB (Solid Rocket Booster) Range Safety System – will be worked over the weekend.
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Lockheed Martin have recommended a switch of a 8Mbs Phased array on its Communications and Tracking (C&T) system to a combination phased array S-Band at low data rates with a High Gain Antenna – called Hybrid “Lite” – due to Orion’s mass and power issues.
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Members of a Special PRCB (Program Requirements Control Board) meeting on Wednesday have once again worked through a vast set of documentation, which concluded with positive results for STS-119′s Flow Control Valve (FCV) flight rationale, ahead of the ultimate launch date decision at Friday’s Flight Readiness Review (FRR).
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Engineers are scheduled to begin the installation of the three replacement Flow Control Valves (FCVs) into Discovery on Tuesday, following their arrival from Vacco. Meanwhile, managers are preparing to meet at Wednesday’s Special Program Requirements Control Board (PRCB) meeting, buoyed by encouraging data on the path towards flight rationale that may even allow for a [...]
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Several options, including a reduced mission duration with only one EVA, are being considered as a contingency to ensuring STS-119 launches in March – prior to the Soyuz cut out. Dependant on gaining flight rationale for Discovery’s Flow Control Valves (FCVs), the effort would add options to avoiding a downstream delay to STS-125′s mission to [...]
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