All ISS systems continue to function nominally, except as noted previously or below. Day 93 in space for Expedition 6. Week 13 is underway.

The crew has half a day off in honor of Russia's "Defenders Day" holiday.

FE-1 Nikolai Budarin performed scheduled maintenance on the Elektron oxygen (O2) generator, replacing its BKO water purification column unit with a new spare. [The standalone BKO removes contaminants from the water to make it suitable for electrolysis into O2 and H2 (hydrogen) by the Elektron. This BKO unit is identical with the BKO used in the condensate water recovery system (SRV-K). The purified water is stored in a dedicated EDV container (also referred to as the KOV) with a volume of 22 L. One liter of water produces about 25 liters of O2, enough for one crewmember for one day.]

Budarin also turned off the gas analyzer in the Soyuz TMA-1 Descent Module which he had activated on 2/20 for air sampling.

CDR Ken Bowersox and FE-2/SO Don Pettit successfully completed the scheduled EVA DTO (development test objective), demonstrating the use of the U.S. EMU (extravehicular mobility unit) by two crewmembers without assist by a third IV person. The crew then tagged up with ground specialists to discuss results. [The three procedures performed by Sox and Don were EMU donning, in-suit prebreathe, and post-EVA. Suits were pressurized to verify ability to don SAFERs (simplified aid for EVA rescue) and exchange Metox (metal oxide) CO2 adsorbent canisters. After a successful ground demo on 2/14, some open questions had remained for the DTO to answer, such as: in case one of the EV crew is incapacitated after EVA, can EMU be doffed without any assistance? The demo showed it to be possible (albeit with some difficulty), by free-float "swimming" out of the HUT (hard upper torso). The DTO was accomplished inside the Airlock (A/L), with opening and closing of the IV hatch from the A/L Crewlock one of the demo objectives. To provide cooling for working in EMUs in the A/L, the ITCS LTL (internal thermal control system/low temperature loop) in the Node first had its RFCA's (rack flow control assembly's) flow setpoint raised (to 113.4 kg/hr); after the DTO, it was lowered again (45.4 kg/hr).]

Yesterday's replacement of the failed BVK-1 vacuum valve group on the Vozdukh carbon dioxide (CO2) scrubber by Nikolai Budarin was successful. Since yesterday afternoon, Vozdukh is up and running in Manual mode 5.

The U.S. CDRA (CO2 removal assembly) has been deactivated. [The check valve in adsorbent bed 2 apparently is stuck open, which required single-bed operation over the weekend until Vozdukh was recovered. Investigation continues.]

Two ppCO2 (CO2 partial pressure) readings were again taken by FE-2/SO Don Pettit with the CDMK (CO2 monitoring kit) in the Lab and SM, one in the morning, the other in the evening.

Bowersox completed the daily payload status inspection in the Lab, checking up on the PCG-STES010 (Protein Crystal Growth-Single Locker Thermal Enclosure System #10) payload.

All crewmembers performed their regular daily physical exercise (2.5 hrs.) on TVIS treadmill, RED resistive device, CEVIS bike and VELO cycle plus load trainer.

R3 software upload operations in the U.S. segment have been successfully completed. Remaining activities are the corresponding upgrade of the Russian segment. Step-up of its onboard computer system (BVS) with the Version 7.01 software is scheduled for the week of 3/3, preceded by procedure review on 2/26.

Steps are being taken to correct an error detected in on-board emergency procedures for the case of a fire in the A/L, which automatically triggers a shutdown of the O2 system. The procedural change will assure that reactivation of the O2 system after the fire is extinguished will not reopen a hazardous situation.

Replacement of storage battery #1 in the FGB, which has been off-line for quite a while, is scheduled for tomorrow.

Today's targets for the CEO (crew earth observations program) were Taiwan Smog (this highly industrialized island generates a high volume of aerosols. The ISS pass is ideal to view the entire island from the North to detect the development of smog plumes. Looking right of track), Lake Nasser, Toshka Lakes; Egypt (oblique context views of the new lakes growing to the west of the Nile are useful for monitoring change. Looking right of track), Seattle, Washington (where weather permits, the crew was to use this pass to document the snow pack of the Cascade Mountains to the right of track), and Denver, Colorado (although Denver itself may not have been visible this pass, crew was to look right of track to document the snow pack on the Front Range of the Rocky Mountains).

CEO images can be viewed at the website
http://eol.jsc.nasa.gov/

Environmental Control and Life Support (ECLSS) and Thermal Control (TCS):
Elektron O2 generator is powered On (24 Amp mode). Vozdukh CO2 scrubber is On (Manual mode 5). U.S. CDRA CO2 scrubber is Off. TCCS (trace contaminant control subsystem) is operating. MCA (major constituents analyzer) is operating. 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 Working Compartment: Pressure (mmHg) -- 753; temperature ( deg C) -- 26.3; ppO2 (mmHg) -- 183.1; ppCO2 (mmHg) -- 1.0 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature ( deg C) -- 20.7.
FGB Cabin: Pressure (mmHg) -- 752; temperature ( deg C) -- 21.7.
Node: Pressure (mmHg) -- 742.62; temperature ( deg C) -- 24.4 (shell); ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 744.92; temperature ( deg C) -- 22.2; ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 745.02; temperature ( deg C) -- 21.7; shell heater temp ( deg C) -- 24.1, ppO2 (mmHg) -- 168.6; ppCO2 (mmHg) -- 3.0.
PMA-1: Shell heater temp ( deg C) -- 24.8
PMA-2: Shell heater temp ( deg C) -- 12.2
(n/a = data not available)
(* = sample location currently unavailable until completion of R3 s/w upload on 2/20)

Propulsion System (PS): Total propellant load available [SM(811) + FGB(2777) + Progress(576)] -- 4164 kg (9180 lb) as of 2/14/03. (Capability: SM -- 860 kg; FGB -- 6120 kg).

Electrical Power Systems (EPS):
Both P6 channels fully operational. Beta Gimbal Assembly (BGA) 2B and 4B both in auto track (sun following) mode.
SM batteries: Battery #3 is in "Cycle" mode (freshly installed); all other batteries (7) are in "Partial Charge" mode.
FGB batteries: Battery #1 is off line; all other batteries (5) are in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 and PCU-2 both in Standby mode.

Command & Data Handling Systems:
C&C-1 MDM is prime, C&C-2 is back-up, and C&C-3 is in standby.
GNC-2 MDM is prime; GNC-1 is Backup.
INT-1 is operating; INT-2 is Off.
EXT-1 is On (primary), EXT-2 is Off.
LA-1, LA-2 and LA-3 MDMs are all operating.
PL-2 MDM is On (primary); PL-1 MDM is Off
APS-1 (automated payload switch #1) and APS-2 are both On.
SM Terminal Computer (TVM): 2 redundant lanes (of 3) operational. Lane 1 is out of the set (as of 11/14/02).
SM Central Computer (TsVM): 3 redundant lanes (of 3) operational.

Attitude Source:
3 CMGs on-line (CMG-1 failed).
State vector -- U.S. SIGI-1 (GPS)
Attitude -- U.S. SIGI-1 (GPS)
Angular rates -- U.S. RGA-1

Flight Attitude:
XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: 0 deg, pitch: -8.8 deg., roll: 0 deg]), with CMG/Thruster Assist Momentum Management).
Solar Beta Angle: -55.3 deg (magnitude decreasing).

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.
Ku-band is operating nominally.
Audio subsystem operating nominally.
Video subsystem operating nominally (VTR1 is operable again).
HCOR (high-rate communications outage recorder) is operating nominally.

Robotics:
SSRMS/Canadarm2 based at MBS PDGF2 with Keep Alive (KA) power on both strings.
MBS: KA power on both strings.
MT: latched at WS4, with KA power.
POA: KA power on both strings.
RWS (robotics workstations): Lab RWS is Off; Cupola RWS is Off.

ISS Orbit (as of this morning, 6:38am EST [= epoch]):
Mean altitude -- 391.3 km
Apogee -- 399.4 km
Perigee -- 383.3 km
Period -- 92.38 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0011914
Orbits per 24-hr. day -- 15.59
Mean altitude loss in last 24 hours -- 100 m
Solar Beta Angle -- -55.3 deg (magnitude decreasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 24342

For more on ISS orbit and worldwide naked-eye visibility dates/times, see
http://www.hq.nasa.gov/osf/station/viewing/issvis.html

Source: NASA