ISS-11 mission chronicle: May
Coverage of Expedition 11’s stay in orbit for May 2005.
Our heroes begin their first full month in orbit. Follow the crew through each action-packed day as they fiddle about with various obscure experiments and fix things that break. Will the Elektron oxygen generator make it through another month without breaking down irreparably? (No.) Stay tuned!
1/5
1st of May holiday; crew off-duty. “At ~15:30 GMT, CDR Krikalyov conducted a teleconference via VHF with Patriarch Alexis II of the Russian Orthodox Church who extended best wishes on the occasion of today’s Orthodox Easter celebration.” (I hope this doesn’t mean Sergei is religious… :-() Sergei then did the daily routine SOZh (Zvezda life support systems) maintenance.
News & reports links
2/5
Labor Day holiday in Russia. Sergei did the regular early morning inspection, as well as a monthly inspection of circuit breakers & fuses in Pirs. He also performed the periodic inspection of the docking mechanism between the Progress and aft of Zvezda. He transferred remaining cargo from Soyuz TMA-6 to stowage in the ISS. He “started the regeneration cycle on absorbent bed #1 of the Russian harmful impurities removal system (BMP).” He then worked on the smoke detectors in Zarya and did daily SOZh maintenance. He and John had an hour set aside for ISS familiarization. Sergei also set up equipment for another regular test tomorrow, the “Russian PZE MO-9 ‘Urolux’ biochemical urine test.” One of the “joys” of Station life are such tests, mainly the regular obtaining of blood and urine samples (also known as “Ouch” and “Yuck”). The Elektron is still off.
News & reports links
3/5
Urine sampling (MO-9/Biochemical Urinalysis) for the crew this morning before breakfast. Fun – not. This is done every 30 days, and before & after spacewalks. Sergei worked on the Russian BMP, БМП harmful impurities removal system. He “also replaced the remaining five (of ten) smoke detectors (IDZ-2, ИДЗ-2) in the FGB Zarya, which have reached their nominal end-of-life.” He also did the daily SOZh maintenance. The Elektron is still off, so yesterday “the crew performed a 9.0 mmHg O2 repress from Progress M-52 oxygen tanks, after which the ppO2 read 157 mmHg.”
News & reports links
4/5
Sergei did his first session with a cardiological experiment, PZEh MO-1. He then replaced four dust filters (PF1-4, ПФ1-4) in Zvezda and did the daily SOZh maintentance. He & John spent several hours packing items to be brought back to Earth on STS-114. Another oxygen repress from the Progress as the Elektron is still off.
News regarding the third crew member:
Later this year, according to a just formalized bilateral agreement between Europe (ESA) and Russia (Roskosmos), Astronaut Thomas Reiter will become the first European long-duration crewmember on the ISS. (Reiter, from Germany, joins the Expedition 11 crew with Shuttle Mission STS-121/ULF1.1 [the one after STS-114/LF-1] and stay on until his return in 2006 with STS-116/12A.1, taking the place of the originally planned Russian Cosmonaut (Tokarev). It will be Reiter’s second long-duration mission aboard a space station, following his six-month stay on the Russian Mir during ESA’s Euromir mission in 1995.)
News & reports links
5/5
The Elektron is still off, despite heroic repair work from Sergei. “Sergei and John also conducted a familiarization checkout with the CMRS (crew medical restraint system) and its attachment system, unstowed from the CHeCS (crew health care systems) rack.” Sergei did the daily SOZh maintenance.
News & reports links
6/5
Another try at restarting the Elektron today, but the cranky oxygen generator shut down after 3 minutes. Sergei “configured the Progress M-52 (17P) Rodnik tank system for liquid waste transfer from the SM holding tank to the empty Rodnik water tanks.” Sergei and John had a session on the Canadarm-2 robot arm. Sergei checked electrical plug outlets in both Russian modules and did the weekly maintenance reboot of the ISS laptop computers. John did SOZh maintenance for a change. Sergei “held the weekly IMS tagup with specialists at TsUP/Moscow, discussing open issues concerning identification of equipment and storage locations for the IMS databases.” The TVIS treadmill went bung (a circuit-breaker tripped for some reason).
News & reports links
7/5
Crew rest day; 3 hours of uborka, уборка – housecleaning. Sergei recovered a log file on one of the Wiener Power laptops (Russian segment) and did the daily SOZh maintenance.
News & reports links
8/5
Sunday; off-duty. Sergei did the daily SOZh maintenance and some photography of the Persian Gulf for Russia’s Environmental Safety Agency (ECON).
News & reports links
9/5
Another off-duty day because of Victory Day holiday in Russia, celebrating 60 years since the end of the Second World War (Great Patriotic War in Russia). Sergei did the same as yesterday (SOZh maintenance, more Earth photography for ECON). Some lucky students in Osaka, Japan, got to do a amateur radio exchange with Sergei and John (a little whinge from me – why do students get all this cool stuff aimed at them? Don’t us older people matter?).
News & reports links
From Itar-Tass online:
ISS Expedition commander Sergei Krikalyov will congratulate his mother from orbit on Victory Day
Moscow, 9 May. ISS Expedition commander Sergei Krikalyov will congratulate his mother from orbit on Victory Day via satellite telephone. His wife Elena spoke about this to the ITAR-TASS correspondent. “In our family on 9 May it is always noted separately, my grandfather perished during the Great Patriotic War, and the mother of Sergei – Nadezhda Ivanovna, who now lives in the heroic city in the Neva, survived the siege of Leningrad,” emphasized Elena.
According to Valerii Lyndin, the official representative of Moscow Mission Control Center, “For Krikalyov and NASA astronaut John Phillips, the Day of Victory is a official weekend.” Lyndin explained, that “the holidays on the ISS are assigned according to an agreement of Russian and American sides to each expedition. In contrast to the majority of Russians, for the ISS crew off-days during May will be only Saturdays and Sundays, and also for us all the day on 9 May,” he explained. “On 10 May cosmonauts will work according to the usual timetable,” they elaborated at TSUP.
The leader of the group of the psychological support of the institute of biomedical problems RAN (Russian Academy of Science) Olga Kozerenko, noted that “the Russian cosmonauts and the NASA astronauts greatly love to look in orbit our films about the war. In all, in the onboard film library are more than 150 cinema and television films, among them, A quiet dawn here…, Officers, Into the battle go some old men, Ata-Baths dispatch soldiers,” added the psychologist.
According to Kozerenko, for cosmonauts during Day of Victory it is not necessary to raise “combat one hundred grams” for the veterans – on the ISS acts a “dry law”, that is much stricter than on the orbital complex Mir. “A good mood to cosmonauts is created not by warming beverages, but by the possibility of contact with relatives and the friends,” she noted, after recognizing that “on” Mir “during holidays it was permitted to accept a little alcoholic liqueur. Now, according to the rules of flight safety, even this is forbidden,” emphasized Kozerenko.
However, in the opinion of Salizhan Sharipov, who returned two weeks ago after a half year in orbit, “For the comfort and the best fulfillment of their responsibilities, for cosmonauts 50 grams of wine would be sufficient, which they usually give to submariners on a prolonged mission.”
– ITAR-TASS Corr. Olga Soshnikova
Russian version, Русская версия: «Командир экипажа МКС Сергей Крикалев с орбиты поздравит свою маму-блокадницу с Днем Победы».
10/5
Second session of the Calf Volume Measurement medical experiment. Sergei cleaned ventilator fans and grilles in Zvezda and a check of the electrical outlet plugs in all Russian modules (which are powering what equipment), then the daily SOZh maintenance. No troubleshooting on the still-inoperable Elektron today.
News & reports links
11/5
The crew each wore an acoustic dosimeter for 24 hours (done twice each Expedition). “The crew performed the periodic 3-hr. routine maintenance job on the RS (Russian segment)’s STTS, СТТС telephone/telegraph subsystem, including its audio paths and intercom stations.” Sergei did some work on the Russian LIV, ЛИВ video complex, installed a sound muffler in an air duct near his (starboard) crew cabin (kayuta, каюта) to quieten the ventilation fan (VKYu-1, ВКЮ-1) and completed the daily SOZh maintenance. The Elektron is still inoperable. At 14:27 GMT, the docked Progress performed an orbit korrektsiya, коррекция (correction) to increase the Station’s altitude by 1.1 km.
News & reports links
12/5
Sergei did preventative maintenance on the Russian segment ventilation systems (i.e. cleaning), then did an inventory of Russian light fixtures. He also did a tally of all the equipment stowed in Pirs. He “conducted the periodic (monthly) functional closure test of a spare emergency vacuum valve (AVK, АВК) for the Vozdukh CO2 removal system” and completed the daily SOZh maintenance. As with previous Russian crew members, on his task list was to take photos for the Russian Uragan, Ураган (Hurricane) Earth-imaging program, using the huge 800 mm camera lens. At 00:45 GMT, the crew downlinked TV greetings to participants of the ‘Zdorovaya Rossiya 2020’ (Healthy Russia 2020) symposium, to be held May 30-June in Moscow. (The event is sponsored by the Russian nonprofit organization ‘Healthy Russia’, implementing the joint US-Russian public service program ‘Zdorovaya Rossiya 2020’. The program is dedicated ‘to a healthy life style and prevention of risky behavior in the youth population’. CDR Sergei Krikalyov is on its Board of Trustees and an avid participant in the activities of the fund, supporting the aim of ‘healthy life style choices, i.e. be athletic, eat correctly, say NO to smoking and drinking’.)”
Yesterday’s reboost was successful, positioning the ISS for the upcoming Progress M-53 launch. The Elektron appears to have given up the ghost and will remain off until a new electronic box of its control system arrives on the Progress. The crew in the meantime will rely on O2 from the current Progress (lasts until May 22-23), then the SFOG/ТГК oxygen-generating candles (there are now 84 of these on board; 2 required per day for 2 crewmembers).
News & reports links
Roskosmos news, 12/5:
One-impulse Correction of the ISS Orbit is Performed
A regular working day on orbit for Expedition 11 crew of the International Space Station (Sergei Krikalyov and John Phillips) was as always hard and full of technical and scientific assignments.
By means of Progress cargo ship they performed one-impulse orbit correction. At present the ISS new orbital parameters are:
- Time period = 91.569 min
- Inclination = 51.66 deg.
- Hmin = 352.21 km
- Hmax = 375.91 km
- Orbit ascending is 1.2 km.
The crew is to carry out the following tasks – technical maintenance of the life-sustaining system, deal with reserve communications facilities, and work under American segment program.
Despite the large volume of works, the crew pays great attention to physical exercises; yesterday they made all necessary physical trainings.
The ISS systems operate at a normal mode, excluding broken Elektron unit (replacement is scheduled for June 2005), the crew members feel good.
Russian version, Русская версия: Проведена одноимпульсная коррекция орбиты МКС.
13/5
Sergei completed installing a muffler for his cabin fan, while John did monthly preventative maintenance for the Russian segment ventilation. Sergei recharged the Motorola-9505 Iridium satellite phone stowed in the TMA-6 descent module. John did the daily SOZh maintenance while Sergei serviced the ASU (loo). Fun. He then collected monthly sensor readings for the Pille-MKS radiation experiment, and installed 2 new foot pedals on the Russian VELO ergometer. Sergei did more Earth observations for the Russian Uragan (Hurricane) experiment.
News & reports links
14/5
Saturday, so three hours of weekly uborka (housecleaning). Sergei did the daily SOZh maintenance, and both he and John had conferences with the ground regarding next week’s schedule. The TVIS treadmill is damaged and currently unusable. Sergei had three items in his “job jar” to complete when he could.
News & reports links
- 14/5 On-Orbit Status Report.
- Space.com: “ISS Oxygen Generator Fails for Good, Station Managers Say”.
15/5
Sunday “rest” day (fewer chores than usual). The cabin atmosphere was given another repress from the Progress oxygen tanks. Sergei did the daily SOZh maintenance. Sergei had three more items in his “job jar” to complete.
News & reports links
16/5
Beginning of week 4 for Sergei & John. Both spent 3 hours on maintenance of the TVIS treadmill. Sergei set up equipment for his first Russian MBI-8 “Profilaktika” (countermeasures) fitness test, and did the daily SOZh maintenance.
News & reports links
17/5
Sergei began Part 1 of his Profilaktika fitness tests. He and John later collected air samples throughout the ISS. Sergei did an audit of the Russian segment docking assembly accessories (StA). He also continued the monthly cleaning of the Russian segment air ventilation systems, then replaced a magnetic recording memory device (ZU-1A) in the Zarya module’s primary radio telemetry unit (RTU-A) and did the daily SOZh maintenance, followed by another round of Uragan Earth observation photography.
News & reports links
18/5
Sergei & John cleaned out PMA-2 in preparation for the Shuttle docking. Sergei continued Day 2 of the Profilaktika fitness test and cleaning the air ventilation in the Russian segment. The cabin atmosphere was given another oxygen repress from the Progress tanks. Sergei began preparations for later use of the SFOG oxygen-generating candles, and the daily SOZh maintenance. Another Uragan Earth-imaging session.
News & reports links
19/5
Sergei performed the last part of the Profilaktika fitness test. He then did some maintenance of his Nikon D1X digital camera, cleaning the lens, and an IMS stowage audit, as well as the daily SOZh maintenance and another Uragan Earth-imaging session.
News & reports links
- 19/5 On-Orbit Status Report.
- MSNBC.com: “Mounting delays stress space station systems”, James Oberg.
From Novosti Kosmonavtiki news №475:
13/10/2005/17:10 – The ISS crew, on the requests of schoolboys, will conduct photography of the Earth from space:
The commander of the 11th ISS crew, Sergei Krikalyov, is not simply fascinated by photo- videotography as are many cosmonauts, but he is also a professional operator. Specifically, he worked with the special IMAX camera in the course of his previous flight on the ISS. The unique photography was later included in the Space Station 3D film.
Командир 11-го экипажа МКС Сергей Крикалев не просто увлекается фото- видеосъемкой, как многие космонавты, а является профессиональным оператором. Именно он работал со специальной камерой «IMAX» в ходе своего предыдущего полета на МКС. Отснятые им уникальные кадры позже вошли в фильм трехмерного изображения под названием «Космическая станция 3D».
Russian version, Русская версия: Экипаж МКС по просьбам школьников проведет фотосъемку Земли из космоса.
Of some interest (and concern) to Sergei is the controversy over who will head the Energiya company after the upcoming presidential elections on 28 May. The Russian government (via the Russian Space Agency) is pushing for a rather dubious candidate, N.N. Sevast’yanov, a businessman with a murky past and currently manager of Gazcom. (Somewhat curiously :-/, a lot of his immediate family have ended up in charge of all the company’s income and expenditure items.) Energiya wants its current president, Yurii Semyonov, to be re-elected. Energiya has put forward its case on its site:
- “Furnished information: it is up to You to decide!”.
- “Commentary of specialists on the materials presented by Roskosmos in connection with the upcoming RSC Energia stockholders’ meeting”.
- “On statement made by FSA official representative Vyacheslav Davidenko and published 11.05.05 by Internet-Edition NEWSru.com”.
20/5
The crew burned two SFOG/ТГК oxygen-generating candles for the first time today; the next burn is to be on Monday. Sergei worked on Russian payload laptop 3. He then did some communications tests in Zvezda and the docked Soyuz, and the daily SOZh maintenance. He & John had a 10-minute interview with CBS news, and teleconferences with the JSC Astronaut Office and Lead Flight Director at MCC-H.
News & reports links
- 20/5 On-Orbit Status Report.
- JSC Station Status Report: 20 May.
- “Space Station Crew to Ignite First Oxygen-Generating Candles”, Space.com.
From Novosti Kosmonavtiki news №475:
20/05/2005/09:48 – The ISS crew will combat noise with the aid of vibration insulators
The members of the 11th crew of International Space Station (ISS), Sergei Krikalyov and John Phillips, will continue the fight for the silence aboard begun by the previous crews, after placing special vibration insulators under the noisy fans of the Zvezda habitable module.
“Earlier with the aid of the special instrument cosmonauts measured the level of noise in different sections of station,” described a representative of Russian TsUP to RIA News. “On the basis of obtained data was comprised a unique “noise map” of the station, after which ground-based specialists gave indication to establish under all onboard fans special vibration insulators,” he noted.
“With this question dealt the previous crews, as a result of which at the station became considerably quieter,” specified the TsUP representative.
According to him, the problem of increased noise on the ISS existed from the very beginning of its building. “Some cosmonauts, who visited the station, in specific conversations told about background noise getting on their nerves, created by the working mechanisms and equipment,” noted the agency collocutor.
At the same time, other members of crews count the problem of that devised, and even they do not use earplugs at night, which are recommended by doctors. “Apparently, this depends on the specific features of rumor and nervous system of each person,” concluded the TsUP representative.
Russian version, Русская версия: Экипаж МКС будет бороться с шумом с помощью виброизоляторов.
21/5
Saturday: off-duty, except for 3 hours of uborka (housekeeping) and some voluntary activities. Sergei did the daily SOZh maintenance and more Uragan Earth-imaging photography. Both he and John conducted the weekly planning conference with TsUP and Houston, using the U.S. S-band (audio). The CDRA (carbon dioxide removal system) in the Lab (Destiny) failed.
News & reports links
22/5
Sunday: off-duty, and beginning of Week 5. Sergei did the regular morning inspection and SOZh maintenance, then had his weekly Private Family Conference at 12:00 GMT via the Russian TV system and Russian ground sites (while passing over them on Daily Orbit 2). He then conducted another Uragan Earth-imaging photography session, and his second session of the Diatomeya ocean-imaging photography.
News & reports links
23/5
Monday morning, back to work, ho-hum. For Sergei and John, session 3 of the periodic Russian biomedical assessment PZEh-MO-7 (Calf Volume Measurement). Two SFOG oxygen-generating candles were burned today (4 to date). Two candles will be “decomposed” each day from now on. More Elektron troubleshooting is scheduled for 27/5. Sergei did various maintenance chores and some work on readying the space-to-space radio system for the European ATV. John got a turn at doing the SOZh maintenance. “TsUP/Moscow is planning to perform the first step of upgrading the SM computers with the new version 7.01 software starting tomorrow.”
News & reports links
From Novosti Kosmonavtiki news №475:
23/05/2005/15:55 – The ISS crew will study “virtual photo-hunting”
The members of the ISS crew – Sergei Krikalyov and John Phillips – will study on Tuesday “virtual photo-hunting” on the Discovery shuttle. As reported by RIA News, the expert OF NASA, the cosmonauts will be trained in the precise aiming of the 800-millimeter lenses of two Kodak digital cameras into the illuminator, in front of which subsequently will fly the Discovery shuttle.
“Survey from onboard the ISS of the flying shuttle is necessary so that with the aid of the obtained photos we will be convinced of the integrity of its skin,” explained the expert. “Thus such, before the return of Discovery to Earth, the specialists of NASA will accurately know, did not occur the damages of the ceramic coating of the hull of ship, as this occurred on the shuttle Columbia that suffered catastrophe on 1st February, 2003,” he elaborated.
According to the expert, with conducting of the survey of the rapidly flying spacecraft it will be important for Sergei Krikalyov and John Phillips to be immobilized near the illuminators so that the photographs would come out clear.
“Unfortunately, there are no handrails for which it is possible to be gripped next to the illuminators of Zvezda; therefore in the course of training it is necessary to clearly visualize as under the conditions of weightlessness and limitedness on the time to ensure the immobility of body and camera itself,” noted the expert.
As described by the commander of the 11th expedition Sergei Krikalyov before his launch to the ISS, before the docking with the ISS, Discovery must carry out a so-called “somersault” and at distance of 200 meters will fly under the station belly-upward. Specifically, at this moment the crew will have to contrive to photograph the American spacecraft.
Russian version, Русская версия: Экипаж МКС займется «виртуальной фотоохотой».
24/5
A fifth SFOG/ТГК candle was burned today to produce oxygen; the other did not ignite. Sergei serviced the Russian BMP harmful impurities removal system, then prepared equipment for the Elektron generator test on 27/5. He also began upgrading the Russian segment computer system (BVS, БВС) to version 7.03., supported by TsUP. He also began setting up equipment for the Russian BIO-5 Rasteniya-2 (“Plants-2”) greenhouse experiment, where he will grow horse radish seeds, then harvest seeds from these plants and plant them. He did the daily SOZh maintenance. He & John practised for photographing the underside of STS-114. Sergei completed another Uragan Earth-imaging photography session.
News & reports links
From Novosti Kosmonavtiki news №476:
24/05/2005/14:14 – Cosmonauts will again attempt to make repairs on the ISS oxygen system
The continuing attempt to repair the oxygen generation system of the ISS will undertake into the medium crew, which works at the station, reports Interfaks. As reported by a representative of TsUP, tomorrow the cosmonauts will attempt to again verify all Elektron systems and will attempt to repair them under the management of specialists from the Earth.
We reminded you that the attempts to make the system of the generation of oxygen were undertaken by the cosmonauts of this and previous of expeditions for a period of several months, since the Elektron system malfunctioned.
Meanwhile some specialists assume that the innovation repair will be required system, for which will have to bring additional equipment from the Earth.
In Russian TsUP they note that this situation does not present danger for the cosmonauts, who work on ISS, since now on the station is located three times as great the reserves of oxygen than usual, and also plentiful stocks of the so-called oxygen cartridges, which are used in the solid-propellant generator of oxygen (TGK) – the alternative source of the production of oxygen on board the station.
Russian version, Русская версия: Космонавты снова попытаются починить кислородную систему МКС.
25/5
Sergei did his first session of the MO-5 MedOps experiment using the VELO cycle ergometer. He then installed a network channel controller box and used a Russian sound level meter to take noise readings in the Zvezda starboard crew quarters, then completed another Uragan Earth-imaging photography session. Reconfigured the STTS, and he & John had a 20-minute TV interview with ABC News. The computer software upgrade yesterday was successful.
News & reports links
26/5
John & Sergei completed an ultrasound scanning medical experiment with Sergei as the subject. Sergei installed mufflers on 2 SM fans. John did the SOZh maintenance. An Uragan session for Sergei. 9 SFOG oxygen candles have been decomposed so far (the 10th was a dud).
News & reports links
27/5
Sergei worked on the Russian segment condensate water processor, part of the currently-stalled SKV air conditioner system. He took more sound measurements in the Zvezda starboard crew quarters (after installing fan mufflers yesterday). He performed a test on a control box in the Elektron; the electrolyzer unit (which splits water into oxygen and hydrogen) is failed and needs to be replaced. He planted horse radish seeds in the Lada greenhouse for the BIO-5 Rasteniya-2 (“Plants-2”) experiment, and did the daily SOZh maintenance and a Uragan session. SFOG candles decomposed to date: 10, plus 2 duds (failures).
News & reports links
28/5
Saturday off-duty, so 3 hours of uborka (housecleaning). Sergei then did the daily SOZh maintenance, an Uragan photography session, and a Russian biomedical experiment. Both he and John had two weekly conferences with the ground.
News & reports links
29/5
Sunday: off-duty. Sergei did the daily SOZh maintenance. Sergei completed 3 voluntary activities from his “job jar”, including a Uragan photography session.
Expedition 11 recorded a video for the U.S. Memorial Day – actually John does all the talking while Sergei hovers like a silent ghost in the background.
News & reports links
30/5
Beginning of Week 6. Sergei did some computer software work and continued testing Elektron support equipment. He and John accessed the Z1 dome in the Truss (on the roof of Unity) to rearrange some stowage equipment. Sergei did the daily SOZh maintenance and worked on repairing one of the SKV air conditioners. SFOG oxygen candles: of the old set, 24 have been used since 20/5 (9 failed), 82 remaining.
News & reports links
From Russian Space Agency (FKA) news:
The c rew conducted the weekly cleaning of the Station
Weekly cleaning was the basic task for the Expedition 11 crew of Sergei Krikalyov and John Phillips at the International Space Station before the weekend.
Besides this, the crew conducted a weekly conference with the program management and a weekly planning conference.
In this case the “Hurricane”, “Pulse” and “Plants-2” experiments were continued.
The crew serviced the life support systems, carried out replacement and start of the solid-propellant oxygen generators, and also conducted works on the restoration of diagram and the switching on of the water condensate regeneration system.
Sergei Krikalyov and John Phillips completed all physical exercises. The health of the crew is good according to the data of the main operations group of control. The orientation of the complex is supported by the means of Russian and American segments.
Russian version, Русская версия: Экипаж провел еженедельную уборку станции.
31/5
Sergei and John had a medical emergency training drill, practising with the onboard defibrillator. Sergei then worked on a ventilation fan in the Soyuz Orbital Module (BO). He & John also had their second on-orbit hearing assessment. John did the SOZh maintenance. Sergei had a Uragan photography session. SFOG oxygen candles: “Three more SFOGs (Russian: TGK, ТГК) were used today, with one failing to ignite. As of tonight, a total of 17 candles of the old set have been decomposed on board since 5/20 (total attempts: 27 [i.e., 10 failures = 37% failure rate, instead of expected 20%]). With the actual failure rate, TGKs currently on board last for 24 days. Progress 18 (arrival 6/18) is manifested to deliver 42 ‘new’ SFOGs (zero failure rate) plus 110 kg (242 lbs) of O2.”