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International Space Station Daily ReportISS On-Orbit Status 07/15/08 All ISS systems continue to function nominally, except those noted previously or below. The Orlan spacewalk EVA-20 by CDR Volkov and FE-1 Kononenko from the DC1 (Docking Compartment) airlock lasted 5 hrs 54 min. All objectives were successfully achieved. The spacewalkers –
The spacewalk began 6 min early, with EVA hatch open at 1:08pm EDT, and ended at 7:02pm. It was the 114th EVA in support of ISS assembly, outfitting & maintenance, with a total spacewalk time of 718 h 48 min, and the 86th EVA out of the ISS. Predicted radiation exposure for the EVA-20 crew was about 15 millirads. To accommodate the spacewalk schedule, the crew’s activity cycle was shifted for a 1h 20min earlier wakeup in the morning (4:10am EDT) and a 4h 50min delayed bedtime tonight (i.e., sleep tonight at 12:20am). Wakeup on Wednesday will be at 9:50am (extending to the more regular 8:00pm bedtime). After morning inspection, all pre-EVA activities proceeded smoothly and on schedule, starting out with Volkov & Kononenko taking another MO-9 “Urolux” urine biochemistry test before breakfast. [A second session with the Urolux equipment will be conducted by both crewmembers tonight (~7:40/7:55pm) immediately after post-EVA station repress.] FE-2 Chamitoff supported the preparations by installing fresh batteries in the cameras and transferring them over to the DC1, then configuring ISS systems for EVA. Pre-EVA preparations by the crew included –
In addition, CDR Volkov and FE-1 Kononenko had about an hour reserved to complete setting up DC1 (Docking Compartment) and PkhO systems for pre-EVA mode. Next steps by Sergey & Oleg were to –
After a midday “snack” at ~8:30-9:10am, the spacewalkers conducted final inspections of the suits, BSS interface units & biomedical parameter telemetry to RGS (~9:50am), including VHF/voice & biomedical electrode belt and *telemetry hookups via the BSS (later by the wireless in-suit Tranzit-B radio telemetry system) for vital signs and equipment monitoring. FE-2 Chamitoff configured the ISS for uncrewed ops. With FE-1 Kononenko, he prepared the Soyuz for his stay during the spacewalk. Gregory’s preparations in the Descent Module (SA) included transfer of SOP (Food Supply Subsystem) food containers and a supply of eight Russian SVO (Water Supply System) water bags. [These provisions would also have been needed in a contingency requiring the entire crew taking to the Soyuz for some time.] After entering the SA and closing the hatch between it and the BO (Orbital Module) at ~9:30am, Gregory performed a 30-min leak check on the hatch interface. In the DC1 and PkhO, after the Orlan & BSS systems checkouts Volkov & Kononenko donned the spacesuits and ancillary gear at ~10:50am, assisting each other, then closed the hatchways between SM RO/PkhO (Working Compartment/Transfer Compartment) and PkhO/SU (DC1 Transfer Vestibule) at ~12:40pm, keeping hatches open between FGB & PMA-1 (Pressurized Mating Adapter 1) and between SM & DC1. At ~10:30am, ISS attitude control authority was handed over to RS MCS (Motion Control System) to keep attitude stable during the (reactive) DC1 airlock depressurization, and was returned to US momentum management by CMGs (Control Moment Gyroscopes) at ~1:50pm. The spacewalkers sealed the Orlan backpacks (~11:20am), followed by Orlan & BSS controls checks. Final checkout of suits and their controls included checking for leak during successive stages of depressurization. [Pressure inside the Orlans was reduced to 0.42 at (6.2 psi). After suit purge, the spacewalkers had a 30-minute oxygen prebreathe period, as pressures between DC-1 and the PkhO were equalized and then further reduced.] Gregory Chamitoff remained sealed off in the Soyuz SA during the spacewalk which began after a final leak check on the four BK-3 O2 tanks. At end of prebreathe, DC1 pressure was down to 15 mmHg (Torr), holding for 5 min for a final cabin leak check, followed by switching the Orlans to autonomous (battery) suit power and opening of EV hatch #1 at 1:08pm. After return and ingress from the EVA, with DC1 airlock repressurization from SM cabin air, the crew opened hatches and reentered the SM for their second MO-9 “Urolux” biochemical urine test. The FE-1 secured and stowed the returned BIORISK-MSN payload. This was to be followed by the crew resetting communications, conducting ISS activation operations and restoring systems configurations in the DC1 and other RS modules to pre-EVA conditions, then installing the DC1 air ducts. Later in the night, Gregory will reconfigure the POC (Portable Onboard Computer) laptops in the USOS for nominal OpsLAN operations, including NetMeeting and KFX (Ku-band File Transfer) functions. [Reconfiguration activities included relocating the SSC-5 (Station Support Computer 5) A31p laptop back to its nominal location in the Lab and reconnecting it to power, plus relocating four A31p battery packs from the Soyuz spacecraft to the Lab for temporary stowage.]
JPM GLAs Failures: JAXA’s Kibo JPM (JEM Pressurized Module) has 3 GLAs (General Luminaire Assemblies) failed. There are no spares on orbit. Work is underway to manifest new units. [ULF-2 plan is to remove all LHAs (Lamp Housing Assemblies) from MPLM (Multipurpose Logistics Module) before undock.] CEO (Crew Earth Observations) photo targets uplinked for today were Polar Mesospheric Clouds (PMC) over Far East Asia, also known as Noctilucent Clouds (the ISS nighttime pass opportunity tracked from the western North Pacific Ocean [just south of Japan] to the western Aleutian Islands [near the International Date Line] for about a ten-minute period. These were high oblique views left of track towards the Earth’s limb) and Lake Poopo, Bolivia (Lake Poopo is a small lake near the southern end of a long, elevated basin in the Bolivian Andes known as the Altiplano. The Altiplano extends from the relatively moist region of Lake Titicaca south-southeastward to the large, bright playa of Salar de Uyuni. Poopo is subject to significant changes in size and color related to the El Nino-Southern Oscillation (ENSO) cycle. The ISS pass was in mid-morning and expected to be clear. Looking well right of track and trying for contextual views of the southern end of the Altiplano including Lake Poopo.) CEO photography can be studied at this “Gateway” website: ISS Orbit (as of this morning, 9:00am EDT [= epoch]): Significant Events Ahead (all dates Eastern Time, some changes possible.): |
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