Battery Charging Controller

NASA ISS On-Orbit Status 3 February 2012

Dan Burbank & Andre Kuipers are on Day 6 of Session 1 of the SOLO (Sodium Loading in Microgravity) experiment, continuing the current High Salt diet, with daily diet log entries. Today's activities involved taking, for the 2nd time, measurements of body mass (BMM) with the SLAMMD (Space Linear Acceleration Mass Measurement Device), final urine sampling after the 24-hr collections, and securing their blood samples in the MELFI (Minus-Eighty Laboratory Freezer for ISS). Special diet intake & logging was not required. [SOLO is composed of two sessions of six days each. From Day 1 to 5 (included), the crewmember is ingesting one of two special diets (low salt & high salt content). SOLO Diet starts with breakfast on Day 1. Day 6 of each session is diet-free. For both diets, specially prepared meals are provided onboard. All three daily meals are logged daily on sheets stowed in the PCBA Consumable Kit in the MELFI along with control solution and cartridges for the PCBA. Body mass is measured with the SLAMMD (Space Linear Acceleration Mass Measurement Device) on Days 4 & 6. Blood samples are taken on Day 5, centrifuged & inserted in MELFI (Minus Eighty Laboratory Freezer for ISS) and also measured with the PCBA. 24-hr urine collections are performed on Day 5, with sample insertion in MELFI. Background: SOLO, a NASA/ESA-German experiment from the DLR Institute of Aerospace Medicine in Cologne/Germany, investigates the mechanisms of fluid and salt retention in the body during long-duration space flight. The hypothesis of an increased urine flow as the main cause for body mass decrease has been questioned in several recently flown missions. Data from the US SLS1/2 missions as well as the European/Russian Euromir `94 & MIR 97 missions show that urine flow and total body fluid remain unchanged when isocaloric energy intake is achieved. However, in two astronauts during these missions the renin-angiotensin system was considerably activated while plasma ANP concentrations were decreased. Calculation of daily sodium balances during a 15-day experiment of the MIR 97 mission (by subtracting sodium excretion from sodium intake) showed an astonishing result: the astronaut retained on average 50 mmol sodium daily in space compared to balanced sodium in the control experiment.] In the Lab, Andre Kuipers serviced the EarthKAM (EKAM/Earth Knowledge Acquired by Middle School Students) payload in the Lab WORF (Window Observation Research Facility) rack by changing battery twice during the day. [EK uses a NIKON D2Xs electronic still camera with 50mm and 180mm lenses, powered by a battery, taking pictures by remote operation from the ground, without crew interaction. It is available for students who submit image requests and conduct geographic research. The requests are uplinked in a camera control file to the A31p SSC-20 (Station Support Computer) laptop which then activates the camera at specified times and receives the digital images from the camera's storage card on its hard drive, for subsequent downlink via OpsLAN. The camera battery is changed when no pictures are being taken. EKAM uses new software on SSC-20 which replaces the version used for the DCS 760 camera. This is the 4th use of the D2Xs camera by EKAM. Students around the world are anxiously awaiting use of the higher resolution images.] FE-6 Pettit downloaded the accumulated data from his and Burbank's recent 2nd (FD30) 24-hr ICV (Integrated Cardiovascular) Ambulatory Monitoring session from two Actiwatch Spectrums and two HM2 HiFi CF Cards to the HRF PC1 (Human Research Facility Portable Computer 1). The laptop was then powered off. [For the ICV Ambulatory Monitoring session, during the first 24 hrs (while all devices are worn), ten minutes of quiet, resting breathing are timelined to collect data for a specific analysis. The nominal exercise includes at least 10 minutes at a heart rate >

Source: Space Ref (press release)

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