Inertial Reference System

NASA ISS On-Orbit Status 8 August 2011

Furukawa & FE-6 Fossum undertook their 9th weekly U.S. "Bisphosphonates" biomedical countermeasures session, ingesting an Alendronate pill before breakfast. The required ~10h fast period started for them last night. This is usually done on Mondays. [The Bisphosphonates study should determine whether antiresorptive agents (that help reduce bone loss) in conjunction with the routine in-flight exercise program will protect ISS crewmembers from the regional decreases in bone mineral density documented on previous ISS missions. Two dosing regimens are being tested: (1) an oral dose of 70 mg of Alendronate taken weekly starting 3 weeks prior to flight and then throughout the flight and (2) an intravenous (IV) dose of 4 mg Zoledronic Acid, administered just once approximately 45 days before flight. The rationale for including both Alendronate and Zoledronic Acid is that two dosing options will maximize crew participation, increase the countermeasure options available to flight surgeons, increase scientific opportunities, and minimize the effects of operational and logistical constraints. The primary measurement objective is to obtain preflight and postflight QCT (Quantitative Computed Tomography) scans of the hip. The QCT scans will provide volumetric bone density information of both cortical and trabecular (spongy) bone regions of the hip.] CDR Borisenko, FE-1 Samokutyayev & FE-4 Volkov conducted the periodic pre-breakfast session of the Russian biomedical routine assessment PZEh-MO-7/Calf Volume Measurement. Afterwards, Andrey, Aleksandr & Sergei were joined by FE-3 Garan, FE-5 Furukawa & FE-6 Fossum in completing the PZEh-MO-8/Body Mass Measurement using the IMT mass measurement device set up (and later stowed away) by Volkov. [For determining body mass in zero-G, where things are weightless but not massless, the Russian IMT "scales" for MO-8 measure the inertial forces that arise during the oscillatory motion of a mass driven by two helical metering springs with known spring constants. By measuring the time period of each oscillation of the unknown mass (the crewmember) and comparing it to the period of a known mass, the crewmember's mass is calculated by the computer and displayed. MO-7 Calf measurements (left leg only) are taken with the IZOG device, a custom-sewn fabric cuff that fits over the calf, using the knee and lower foot as fixed reference pints, to provide a rough index of deconditioning in zero-G and effectiveness of countermeasures.

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For the fourth time, Honeywell, has been selected to provide components for China's new C919 commercial airliner. The New Jersey-based company's inertial reference and air data systems are among recent selections made by Commercial Aircraft Corporation of China, Ltd. (COMAC) for its new single-aisle jet.

Inertial reference system

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Multi-Engine Flying

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