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10.10.05, 20:22 #31
19.10.05, 22:40 #32
Ein geplantes Manöver die ISS wieder in eine höhere Umlaufbahn zu bringen ist heute unerwartet wegen einer Fehlfunktion in der russischen Steuerung des Progress-Moduls fehlgeschlagen, statt 11 Minuten Schub in einer ersten Schubphase feuerten die Triebwerke nur 2 Minuten und ein Höhengewinn von etwas über einen Km. Die technische Ursache der Fehlfunktion wird derzeit noch geklärt, ein besonders großes Problem ist dies nicht.
20.10.05, 17:27 #33
Es wird wahrscheinlich noch im Laufe des Tages über einen zweiten Anlauf entschieden, die ISS wieder in einen höheren Orbit zu bringen. Die russische Weltraumagentur ist zuversichtlich dies durchführen zu können, da die Notabschaltung beim letzten Versuch darauf zurückging, das ein Überwachungssystem einen nicht-synchronen Brennverlauf von zwei Triebwerken festgestellt hatte und daher abschaltete.
22.10.05, 01:16 #34
Expedition 12 Commander Bill McArthur and Flight Engineer Valery Tokarev began reviewing procedures for the first station-based spacewalk using U.S. suits since 2003.
During the November 7, five and one half hour spacewalk, they will install a new video camera on the far end of the station's P1 (port) truss. They also will remove a probe that measured the electrical potential around the station from the top of the P6 truss.
Yesterday, the station's atmosphere was repressurized with oxygen from storage tanks on the docked Progress supply ship. Russian specialists are preparing a troubleshooting plan for the Elektron, the primary oxygen generation system on the station. It stopped working late last week.
Russian technical specialists are examining what caused the abort of a planned altitude reboost Tuesday using Progress fuel and thrusters.
Mission managers believe Russian navigation computers properly shut down the thrusters when they lost information about how they were performing. A planned test firing of the thrusters Wednesday will gather more data for Russian engineers.
McArthur checked out a system to analyze exhaled gases inside the station. The Pulmonary Function System took more than eight years of design, development and testing on Earth by U.S. and European Space Agency scientists. It was delivered to the station by the shuttle Discovery in July. McArthur and Tokarev conducted the first of three sessions with the Renal Stone experiment. They collected urine samples for return to Earth and logged all food and drink consumed during a 24-hour period.
This ongoing experiment investigates whether potassium citrate can be used to reduce the risk of kidney stone formation for space travelers. The citrate minimizes kidney stone development on Earth.
Since urine calcium levels are typically much higher in space, astronauts are susceptible to an increased risk of developing kidney stones. An understanding of the crew's diet during the urine collection timeframes will help researchers. They will determine if the excess calcium in the urine is due to diet or a response to the microgravity environment. The payload operations team at NASA's Marshall Space Flight Center, Huntsville, Ala., coordinates U.S.
science activities on the station.
During their six-month mission, McArthur and Tokarev will conduct at least two spacewalks and oversee the arrival of the next Progress supply vehicle in December. They also will relocate their Soyuz spacecraft to free the Russian Pirs docking port for a later spacewalk. Pirs doubles as an airlock and docking module.
28.10.05, 11:24 #35
Obwohl der US Kongress und Senat Russland durch Handels-Sanktionen davon abbringen will den Iran weiterhin mit Wissen und Ausrüstung für sein ziviles Nuklear-Programm zu versorgen, hat man nun einheitlich beschlossen, dass die NASA auch weiterhin Soyuz-Flüge in Russland einkaufen darf, um die Versorgung der ISS sicher zu stellen.
29.10.05, 14:36 #36
Commander Bill McArthur and Flight Engineer Valery Tokarev checked the clothes, tools and plans they will use during a five and one half-hour spacewalk set for Nov. 7.
McArthur and Tokarev will mark five years of continuous human presence on the international space station Nov. 2. They are the 12th station crew. The first station crew, Commander Bill Shepherd, Flight Engineers Sergei Krikalev and Soyuz Commander Yuri Gidzenko, arrived at the complex on Nov. 2, 2000.
Originally the size of an efficiency apartment, the station has grown to a volume larger than the average three-bedroom house, equipped with the most sophisticated laboratory ever to fly in space. The station is functioning as a test bed for technologies, procedures and human endurance that will allow future, longer space journeys.
McArthur and Tokarev sent an anniversary greeting this week to the prior station crews and to the thousands who support the station in
On Tuesday, the crew performed a checkout of the spacesuits they will wear for their spacewalk. The spacewalk will be the first from the station to use U.S. spacesuits and originate from the Quest Airlock since April 2003.
The crew will install a TV camera on the station's port side truss.
The camera will be an important aid during future assembly work They also plan to remove an experiment from the top of the P6 truss, the station's highest point. The experiment measured the electrical environment around the exterior of the station.
On Wednesday, the crew tested procedures to put on and take off spacesuits, reviewed plans and conferred with spacewalk specialists on the ground. Thursday they suited up and rehearsed the activities inside the station they will perform outside. The spacewalk will begin about 9:30 a.m. EDT with coverage on NASA TV beginning at 8:30 a.m. EDT, Nov. 7.
All station systems are operating well. The Elektron oxygen-generating system, one of several methods of replenishing oxygen in the station cabin atmosphere, is functioning. It was restored to operation Saturday, when Tokarev performed a maintenance procedure to purge air bubbles from its systems.
Russian flight controllers completed a test firing of thrusters on the Progress cargo craft on Wednesday. The thrusters shut off early last week during a planned reboost of the complex. The thrusters were fired using a different manifold, as Russian controllers continued to evaluate a loss of data from the system observed during the aborted reboost. During the test firing, the engines operated normally. They are planned for use during the next reboost of the station on Nov. 10.
02.11.05, 20:34 #37
Die ISS ist jetzt seit 5 Jahren bemannt. Man hatte zwar gehofft, jetzt schon deutlich weiter zu sein, aber angesichts der sehr turbulenten Zeiten im Raumfahrt-Sektor ist man schon froh das zu haben, was man hat.
06.11.05, 17:40 #38
Man bereitet sich auf einen weiteren Außeneinsatz vor und hat wieder einiges an schadhaften Systemen repariert/ausgetauscht.
The Expedition 12 crew prepared for the mission's first spacewalk and kept the station ship-shape this week.
Station Commander Bill McArthur and Flight Engineer Valery Tokarev reviewed procedures and prepared tools for the spacewalk. It starts at 9:30 a.m. EST, Monday. Coverage on NASA TV begins at 8:30 a.m.
The spacewalk is the first using U.S. spacesuits since 2003. During the 5.5 hour spacewalk, the crew will install a TV camera on the station's port truss. The camera will be an important aid during future assembly work. The crew also will remove an old experiment from the top of the P6 truss, the station's highest point. The experiment measured the electrical environment around the station.
The station passed the milestone of five years of human presence aboard the complex.
The first station crew, Commander Bill Shepherd and cosmonauts Sergei Krikalev and Yuri Gidzenko, arrived at the complex on Nov. 2, 2000.
The crew also focused on hardware maintenance. Monday they disassembled and measured air flow in the Trace Contaminant Control System. It keeps a clean, healthy atmosphere by filtering out contaminants in the air. Engineers noticed a reduction in the air flow, and after the crew examined its components, determined that replacement hardware may need to be delivered on a future supply ship. After reassembling the device, the system is running at a slightly reduced capacity, complemented by a fully operational and complementary system in the Russian segment.
The crew also replaced a faulty pump in a thermal control loop and smoke detectors in the Zvezda Service Module and cleaned ventilation filters in the Zarya module.
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10.11.05, 23:26 #39
Expedition 12 Commander Bill McArthur and Flight Engineer Valery Tokarev get a special musical wakeup call this weekend as Paul McCartney connects with them live from a concert in Anaheim, Calif.
The call will take place at 12:55 a.m. EST Sunday and will be broadcast live on NASA Television and www.nasa.gov.
McArthur and Tokarev spent the week servicing the spacesuits used Monday for a 5 hour, 22 minute excursion outside the station. During the spacewalk, they installed a television camera, jettisoned an inactive science experiment and removed and replaced other equipment on the truss system of the complex.
The crew's second spacewalk is planned for Dec. 7. McArthur and Tokarev will don Russian Orlan spacesuits and exit the Pirs Docking Compartment airlock for that excursion. During the spacewalk, they will move a cargo crane adapter, collect science experiments from the hull of the Zvezda Service Module and manually launch an expired Russian spacesuit equipped with amateur radio equipment. Called SuitSat, the experiment is designed to see if ham radio contacts can be made with a free-flying transmitter.
To prepare for the spacewalk, McArthur and Tokarev will relocate their Soyuz spacecraft from the Pirs docking port to the nadir docking port of the Zarya module on Nov. 18, briefly leaving the station unoccupied.
Earlier today, four thruster engines on the Progress cargo spacecraft were fired for more than 33 minutes in two separate reboost maneuvers to raise the altitude of the outpost. The station is now in a near circular orbit of 219 miles to accommodate the launch and docking of the next resupply ship in December. The reboost was the longest ever completed using Progress engines.
On Wednesday, Tokarev replaced a control panel for the station's toilet in Zvezda that had malfunctioned earlier in the week. The temporary loss of the use of the device's liquid disposal component had no impact on station operations. Following the troubleshooting, the toilet is now operating normally.
20.11.05, 18:21 #40
Expedition 12 Commander Bill McArthur and Flight Engineer Valery Tokarev took a short ride around the International Space Station today, flying their Soyuz spacecraft from one docking port to another.
The crew left the station unoccupied for approximately 30 minutes, as they relocated the Soyuz. Tokarev undocked the spacecraft at 3:46 a.m. EST, while the station orbited 225 miles above the Atlantic, and docked to the nearby Zarya module at 4:05 a.m. EST.
The Soyuz move freed the Pirs Docking Compartment airlock for an upcoming spacewalk. The Soyuz is the crew's ride home at the end of their six-month stay on the station. It also serves as a lifeboat.
The crew must finish unpacking the Progress cargo spacecraft docked to the complex, prepare it for undocking and get ready for the Dec. 23 arrival of the next supply ship. McArthur spent several hours photographing samples of colloids that had been undisturbed in the station's microgravity environment for more than a year. The work is part of an experiment called the Binary Colloidal Alloy Test. The behavior of these supercritical fluids is important because they combine the properties of liquids and gases. A better understanding of their reaction in the weightless environment of space could help in the development of new drugs, cleaner power and interplanetary transportation.
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