FE/SO Michael Fincke and CDR Gennady Padalka began "pre-gathering" U.S. EVA tools in the Airlock and configuring them along with specific stowage bags for later transfer to the Russian segment (RS) and the DC1 docking module, based on a detailed usage and stowage plan uplinked by MCC-H. The preps included a safety tether inspection, from the "job jar" task list. [The equipment preparations are being videotaped with the U.S. digital DVCAM for downlink via Ku-band and supported by tagup with ground specialists via S-band. In addition to the required tool complement, the packing includes some "spare equipment" in the event that it may be needed.]

The crew also spent about two hours with a checkout of and familiarization with the PGTs (pistol grip tools). [The two PGTs checked out for the EVA will be using torque-only programs with preprogrammed settings. They are powered by NiMH batteries ##1005 & 1018, which performed nominally during the recent discharge/recharge servicing.]

Padalka continued the current round of periodic preventive maintenance of Russian segment (RS) ventilation systems, today in the "Pirs" DC-1, where he cleaned the V3 ventilator fan screen.

The FE terminated the daily leak check of the Lab window pressure testing equipment and disassembled it for subsequent stowage. [Components included the FSS (fluid system servicer), MPEV ISA (manual pressure equalization valve/internal sampling adapter), FSS desiccator/filter and "Aeolus" scopemeter. The "net" leak rate of the window's inter-pane "Volume D" can now be determined.]

Systems monitoring of the Soyuz TMA-4 crew return vehicle (CRV) continues. Twice today, the CDR again took routine spacecraft parameter readings (Form 03) in the vehicle for downlink to TsUP/Moscow.

Fincke performed the routine maintenance of the SM's SOZh life support system, prepared the daily "delta" file for updating the IMS (inventory management system) database(s) and also conducted the regular routine status checkup of autonomously operating Increments payloads (today PCG-STES010).

The crew completed their daily 2.5-hr. physical exercise program on TVIS treadmill, RED expander and VELO ergometer with load trainer.

After Saturday's successful reloading of the SSC (station support computer) laptops by Mike Fincke, the ground today rebooted client programs of the ISS OCA Windows Operating System (to pick up the new USB configuration). The rebooting was timed for a period of no Ku-band availability.

The checkout/calibration of the new 14P-delivered CSA-CP (compound specific analyzer-combustion products) devices was successful. There are now three CSA-CPs on board for measuring ppO2 (oxygen partial pressure).

Today's CEO (Crew Earth Observations) photo targets, limited in XPOP attitude by flight rule constraints on the use of the science window, which is available for only ~1/4 of each orbit when not facing forward (in "ram"), were Kuwait City, Kuwait (near nadir pass), Lisbon, Portugal (near nadir pass. Looking on both sides of the estuary), Boston, MA (near nadir pass. Boston has not been seen for weeks during "daylight awake" hours, with good weather), and Tucson, AZ (nadir pass. Tucson is the largest urban area in the US [Tucson with adjacent small cities ~800,000] to rely on groundwater pumped mainly from aquifers).

CEO images can be viewed at the websites http://eol.jsc.nasa.gov and http://earthobservatory.nasa.gov.

See also the website "Space Station Challenge" at http://voyager.cet.edu/iss/.

U.S. & Russian Segment Status (as of this morning, 11:56am EDT)

Environmental Control and Life Support (ECLSS) and Thermal Control (TCS):

Elektron O2 generator is On. Vozdukh CO2 scrubber is On. U.S. CDRA CO2 scrubber is Off. TCCS (trace contaminant control subsystem) is operating. SM Gas Analyzer has been calibrated and is used for ppO2 & ppCO2 monitoring. MCA (major constituents analyzer) is in Life Extending Mode (LEM). BMP Harmful Impurities unit: absorbent bed #1 in Purify mode, bed #2 in Purify mode. RS air conditioner SKV-1 is On, SKV-2 is Off (SM panel mods completed 4/8; SKV-2 activation failed 4/20; is now functioning again). SFOG slot #2 fan suspect (not usable).

SM Working Compartment: Pressure (mmHg) -- 742; temperature (deg C) -- 26.1; ppO2 (mmHg) -- 155.0; ppCO2 (mmHg) -- 3.7;
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C) -- 20.7.
FGB Cabin: Pressure (mmHg) -- 756; temperature (deg C) -- 22.7.
Node: Pressure (mmHg) -- 750.25; temperature (deg C) -- 23.6 (shell); ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 751.79; temperature (deg C) -- 23.9; ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 751.89; temperature (deg C) -- 24.5; shell heater temp (deg C) -- n/a, ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- n/a
PMA-2: Shell heater temp (deg C) -- n/a.

(n/a = data not available)

Electrical Power Systems (EPS):

Both P6 channels fully operational. BGA (beta gimbal assembly) 2B and 4B both in Autotrack (solar-tracking, "sun slicer", i.e., drag reduction-biased by 47 deg).
SM batteries: Battery #1 is in "Cycle" mode. All other batteries (7) are on line in "Partial Charge" mode.
FGB batteries: Battery #5 is off line; battery # 1 is in "Cycle" mode; all other batteries (4) are on line in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 is in Standby mode; PCU-2 is in Standby mode.

Command & Data Handling Systems:

C&C-1 MDM is prime, C&C-2 is backup, and C&C-3 is in standby.
GNC-2 MDM is prime; GNC-1 is backup.
INT-2 is operating; INT-1 is Off.
EXT-1 is On (primary), EXT-2 is Off (backup).
LA-1, LA-2 and LA-3 MDMs are all operating.
PL-1 MDM is Off; PL-2 MDM is Operational.
APS-1 (automated payload switch #1) and APS-2 are both On.
SM Terminal Computer (TVM): 2 redundant lanes (of 3) operational (string 1 dropped out 11/22/03).
SM Central Computer (TsVM): 2 redundant lanes (of 3) operational (string #3 dropped out 10/22/03).
FGB MDM-1 is Off (failed, 11/21/03); MDM-2 is Operational.

Propulsion System:

Total propellant load available: 3372 kg (7434 lb) as of 6/3/04; [SM(552) + FGB(2820) + Progress M-1(0)]. (Capability: SM -- 860 kg; FGB -- 6120 kg).

Attitude Control Systems:

2 CMGs on-line (CMG-1 failed, since 6/6/02; CMG-2's RPC-17 failed 4/21/04).
State vector source -- U.S. SIGI-1 (GPS)
Attitude source -- U.S. SIGI-1 (GPS)
Angular rate source -- RGA-1

Flight Attitude:

XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: 0.5 deg, pitch: -9.0 deg., roll: 0 deg]), with CMG TA (thruster assist).

Communications & Tracking Systems:

FGB MDM-1 is powered Off; FGB MDM-2 is operational.
All other Russian communications & tracking systems are nominal.
S-band is operating nominally (on string 2).
Ku-band is operating nominally (may require a mask).
Audio subsystem is operating nominally (IAC-1 is prime, IAC-2 is off).
Video subsystem operating nominally.
HCOR (high-rate communications outage recorder) is operating nominally.

Robotics:

SSRMS/Canadarm2 based at Lab PDGF/LEE A, operational on redundant string, off on prime.
MBS: KA (keep alive) power on both strings.
MT: latched and mated at WS4.
POA: KA power on both strings.
RWS (robotics workstations): Lab RWS is On (DCP connected); Cupola RWS is Off.

ISS Orbit (as of this morning, 8:49am EDT [= epoch]):

Mean altitude -- 362.3 km
Apogee -- 366.0 km
Perigee -- 358.6 km
Period -- 91.79 min.
Inclination (to Equator) -- 51.6333 deg
Eccentricity -- 0.0005514
Solar Beta Angle -- -22.3 deg
Orbits per 24-hr. day -- 15.69
Mean altitude loss in last 24 hours -- 100 m
Revolutions since FGB/Zarya launch (Nov. '98) -- 31680

For more on ISS orbit and worldwide ISS naked-eye visibility dates/times, see

http://www.hq.nasa.gov/osf/station/viewing/issvis.html