ISS On-Orbit Status 27 May 2003<br /><br /> All ISS systems continue to function nominally, except as noted previously<br />or below.<br /><br />During a Russian ground site (RGS) pass on Daily Orbit 2, CDR Yuri<br />Malenchenko performed his first session with the Russian MedOps cardio<br />experiment MO-1 (Study of the Bioelectric Activity of the Heart at Rest),<br />with Ed Lu assisting as CMO (crew medical officer). [During the test,<br />transmittal of the Gamma-1M ECG (electrocardiogram) signal to the ground was<br />required for about 5-6 minutes.]<br /><br />Later in the day, Malenchenko set up the "Urolux" equipment for his and Ed<br />Lu's first session with the Russian biochemical urine test (PZE MO-9), on<br />tomorrow's schedule for both crewmembers.<br /><br />Science Officer Dr. Lu activated (and later deactivated) the MSG<br />(Microgravity Science Glovebox), but the originally planned InSPACE<br />(Investigating the Structure of Paramagnetic Aggregates from Colloidal<br />Emulsions) test run #12 was deferred to some later date.<br /><br />Lu also performed an RS-232 card push-button reset of EXPRESS Rack 4 (ER4),<br />time critical since it required ground support via Ku-band coverage.<br /><br />Malenchenko conducted a checkout of the available repair equipment for the<br />Vozdukh carbon dioxide (CO2) scrubber system. [The objective was to verify<br />the availability of good, undamaged tools (anchor screwdriver, wrenches)<br />used previously during Vozdukh fan and vacuum valve replacement activities.]<br /><br />Ed Lu meanwhile completed the periodic one-hour task of inspecting and<br />cleaning hatch seals and hatch plate sealing surfaces in the U.S. segment<br />(USOS). [Hatch seals are lubricated with Braycote-601, which is also<br />deposited on the sealing surfaces. Dust and particles (FOD, foreign object<br />debris) can stick to the lubricant an both the seals and sealing surfaces.<br />These are regularly inspected for FOD, nicks, burrs, cuts or gouges that<br />would impair a proper seal, and are cleaned, as required, with dry wipes and<br />Kapton tape. (Last time done: 2/27/03).]<br /><br />Ed also completed a "zero" calibration run of the CSA-CP (compound specific<br />analyzer-combustion products), then activated and deactivated the CSA-CP for<br />a cabin air composition data take.<br /><br />Early in the morning, after breakfast, Lu deployed the acoustic dosimeters,<br />being worn by each crewmember for 24 hours. A third dosimeter was deployed<br />in the Lab for a 24-hr. static data take. [Tonight, after about 12 hours of<br />measurements, data from each dosimeter will be recorded and the hardware<br />power-cycled. Acoustic data must be taken twice per Increment, each time<br />for the duration of the 16-hour crew work day.]<br /><br />Malenchenko also performed another Russian segment (RS) inventory audit to<br />update the IMS (inventory management system) database. [MCC-M has merged<br />Yuri's audit of 5/23 with the database and uplinked a further list of<br />equipment for continued updating and confirmation of items, some of which<br />still have not been located.]<br /><br />The CDR conducted the daily routine maintenance of the SM's SOZh life<br />support system (including ASU toilet facilities), prepared the daily IMS<br />inventory delta file, and completed the regular inspection of the active<br />BRPK-1 air/liquid condensate separator system in the Service Module (SM).<br /><br />Malenchenko performed his regular daily monitoring/servicing of the BIO-5<br />Rasteniya-2 ("Plants-2") zero-G plant growth experiment, checking water<br />level in the Lada-2 greenhouse water container and the seed status.<br /><br />Yuri also completed the weekly maintenance of the TVIS treadmill, and both<br />crewmembers did their regular daily workouts on TVIS, RED expander, CEVIS<br />cycle and VELO ergometer with load trainer.<br /><br />FE/SO Ed Lu initiated another EMU battery charge/discharge cycle in the BSA<br />(battery storage assembly). [The battery maintenance activity, with one<br />hour stand time between charge and discharge, is now required every 50 days.<br />The discharge is terminated automatically by the BSA charger in ~24 hrs.]<br /><br />At 8:55am EDT, Ed Lu set up and conducted a ham radio session with students<br />of Klem Road South Elementary School in Webster, N.Y., via an ARISS<br />telebridge station in Hawaii.<br /><br />At 11:45am, on Daily Orbit 1, MCC-Moscow/TsUP ran a test of the LKT4B2 local<br />signal switch device (commutator) in the SM which is associated with the<br />US-21 matching unit in the Progress vehicle. [To conduct the test, the<br />ground first had to inhibit onboard systems such as the SKV-1 air<br />conditioner, BMP microfiltration unit, Elektron O2 generator, BITS telemetry<br />system and VD-SU control system, as well as the Vozdukh and DC-1 SOTR<br />(thermal system) control algorithms. All inhibited systems were<br />subsequently reactivated via pre-set time-tagged commands, again over RGS<br />(Russian ground sites). These RGS opportunities also need to be reconciled<br />with the TsUP's limited channel availability on the Russian Molniya comm<br />satellite, which Rosaviakosmos is sharing with the Russian Military Forces<br />.]<br /><br />Overnight, at 00:37am EDT, the ISS was maneuvered from earth-fixed LVLH YVV<br />flight attitude back to sun-oriented XPOP (x-axis perpendicular to orbit<br />plane), with yaw/pitch/roll angles of 0.5/-6.9/0 degrees.<br /><br />U.S. and Russian Segment Status (as of 2:02pm EST).<br /><br />Environmental Control and Life Support (ECLSS) and Thermal Control (TCS):<br /><br />Elektron O2 generator is powered On (20 amp mode). Vozdukh CO2 scrubber is<br />On (manual mode 3). U.S. CDRA CO2 scrubber is Off. TCCS (trace contaminant<br />control subsystem) is operating. MCA (major constituents analyzer) is<br />operating. BMP Harmful Impurities unit: absorbent bed #1 in Purify mode,<br />bed #2 in Purify mode. RS air conditioner SKV-1 is On; SKV-2 is Off.<br />SM Working Compartment: Pressure (mmHg) -- 742; temperature (deg C) --<br />26.7; ppO2 (mmHg) -- data invalid; ppCO2 (mmHg) -- data invalid.<br />SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C) --<br />21.1.<br />FGB Cabin: Pressure (mmHg) -- 744; temperature (deg C) -- 23.3.<br />Node: Pressure (mmHg) -- 741.62; temperature (deg C) -- 23.7 (shell); ppO2<br />(mmHg) -- n/a; ppCO2 (mmHg) -- n/a.<br />U.S. Lab: Pressure (mmHg) -- 744.41; temperature (deg C) -- 23.1; ppO2<br />(mmHg) -- n/a; ppCO2 (mmHg) -- n/a.<br />Joint Airlock (Equip. Lock): Pressure (mmHg) -- 744.51; temperature (deg<br />C) -- 25.0; shell heater temp (deg C) -- 24.9, ppO2 (mmHg) -- 171.2; ppCO2<br />(mmHg) -- 4.7.<br />PMA-1: Shell heater temp (deg C) -- 21.8.<br />PMA-2: Shell heater temp (deg C) -- 13.6.<br /><br />(n/a = data not available)<br /><br />Propulsion System (PS):<br /><br />Total propellant load available: 3573 kg (7877 lb) as of 5/22 [SM(774) +<br />FGB(2547) + Progress(252)]. (Capability: SM -- 860 kg; FGB -- 6120 kg).<br /><br />Electrical Power Systems (EPS):<br /><br />Both P6 channels fully operational. BGA (beta gimbal assembly) 2B and 4B<br />both "directed" (non-solar tracking) mode ("sun slicer" position, for drag<br />reduction).<br />SM batteries: Batteries #4 and #8 are disconnected (failed); battery #5 is<br />in "Cycle" mode; all other batteries (5) are in "Partial Charge" mode<br />(battery #2 is exhibiting degraded performance).<br />FGB batteries: Battery #4 is disconnected; battery #3 is in "Cycle" mode;<br />all other batteries (4) are in "Partial Charge" mode.<br />Plasma Contactor Unit PCU-1 in Standby mode; PCU-2 in Discharge mode.<br /><br />Command & Data Handling Systems:<br /><br />C&C-1 MDM is prime, C&C-2 is back-up, and C&C-3 is in standby.<br />GNC-1 MDM is prime; GNC-2 is Backup.<br />INT-1 is operating; INT-2 is Off.<br />EXT-2 is On (primary), EXT-1 is Off (both now upgraded to R3).<br />LA-1, LA-2 and LA-3 MDMs are all operating.<br />PL-2 MDM is Off; PL-1 MDM is Operational.<br />APS-1 (automated payload switch #1) and APS-2 are both On.<br />SM Terminal Computer (TVM): 3 redundant lanes (of 3) operational. Being<br />upgraded.<br />SM Central Computer (TsVM): 3 redundant lanes (of 3) operational. Being<br />upgraded.<br /><br />Attitude Control Systems:<br /><br />3 CMGs on-line (CMG-1 failed).<br />State vector source -- U.S. SIGI-1 (GPS)<br />Attitude source -- U.S. SIGI-2 (GPS)<br />Angular rate source -- RGA-1<br /><br />Flight Attitude:<br /><br />XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: 0.5 deg,<br />pitch: -6.8 deg., roll: 0 deg]), with CMG TA (thruster assist).<br />Solar Beta angle: 59.3 deg (magnitude decreasing).<br /><br />Communications & Tracking Systems:<br /><br />FGB MDM-1 is powered Off; FGB MDM-2 is operational.<br />All other Russian communications & tracking systems are nominal.<br />S-band is operating nominally (on string 2).<br />Ku-band is operating nominally.<br />Audio subsystem is operating nominally [IAC-1 (internal audio controller #1)<br />being analyzed after self-test error. IAC-2 is prime.]<br />Video subsystem operating nominally.<br />HCOR (high-rate communications outage recorder) is operating nominally.<br /><br />Robotics:<br /><br />SSRMS/Canadarm2 based at MBS PDGF #1 with Keep Alive (KA) power on both<br />strings.<br />MBS: KA power on both strings.<br />MT: latched at WS4, with KA power.<br />POA: KA power on both strings.<br />RWS (robotics workstations): Lab RWS is Off; Cupola RWS is Off.<br /><br />ISS Orbit (as of this morning, 5:58am EDT [= epoch]):<br /><br />Mean altitude -- 388.9 km<br />Apogee -- 393.6 km<br />Perigee -- 384.3 km<br />Period -- 92.33 min.<br />Inclination (to Equator) -- 51.63 deg<br />Eccentricity -- 0.0006929<br />Orbits per 24-hr. day -- 15.59<br />Solar Beta Angle -- 59.3 deg (magnitude decreasing)<br />Mean altitude loss in last 24 hours -- 60 m<br />Revolutions since FGB/Zarya launch (Nov. '98) -- 25776<br />For more on ISS orbit and worldwide naked-eye visibility dates/times, see<br />http://www.hq.nasa.gov/osf/station/viewing/issvis.html