ISS On-Orbit Status 4 Mar 2002
All ISS systems continue to function nominally, except as noted previously or below.
The crew had a busy day, and all planned activities were successfully completed [as was the case “over” at the Hubble telescope where the first solar array swap-out was accomplished].
CDR Yuri Onufrienko worked for about 1.5 hours on the continued failure diagnosis of the SNT voltage and current stabilizers in the SM electrical power system, which are designed to accept “external” power from the ARCUs (American-to-Russian converter units) when an acute shortage arises and a specific number of storage batteries have already been discharged.
FE-1 Carl Walz and FE-2 Dan Bursch completed the R&R work on the ARIS (active rack isolation system) Rack, including snubber pin depth measurement, ICE (isolation characteristics experiment) nominal configuration setup, rotation of the ARIS EXPRESS Rack 2 forward to gain access, and replacement of the pushrod flexure and upper pushrod actuator assembly. Calibration of the ARIS pushrod was deferred.
Onufrienko, assisted by Walz, conducted a functional check of the ESA-sponsored GTS (Global Timing System) payload, demating and remating connectors and checking line resistances step by step.
CDR also completed the planned telephone tagup with ground specialists on the Russian/Australian “Kolibri” micro-satellite experiment, after having reviewed the uplinked background material last week.
Onufrienko and Bursch worked on relocating cargo bundles temporarily stowed in the FGB to clear up potential obstructions of passages required for ventilation and thermal control.
The crewmembers performed their daily physical exercise, and the two flight engineers completed the periodic MedOps physical fitness evaluation (PFE), taking turns in assisting each other.
The crew also performed the regular daily routine tasks, i.e., stage UF-1 payload status check, IMS delta file preparation, and maintenance of SOSH life support systems.
After the successful ARIS R&R, the crew is ready for tomorrow?s planned SSRMS ops and an S0 (starboard zero truss) installation dryrun for 8A on 3/6 (Thursday).
U.S. and Russian Segment Status (as of 1:44 pm EST today):
Environmental Control and Life Support (ECLSS) and Thermal Control (TCS):
- Elektron O2 generator is On (32 Amp mode, a higher setting than recently). Vozdukh CO2 scrubber is in MANUAL cycle mode #5 (vacuum pump failed). U.S. CDRA CO2 scrubber is in Standby.
- BMP Harmful Impurities unit: Absorbent bed #1 in Purify mode, #2 in Purify mode.
- SM Working Compartment: Pressure (mmHg) — 757, temperature (deg C) — 26.5, ppO2 (mmHg) — 158.0, ppCO2 (mmHg) — 3.3.
- SM Transfer Compartment: Pressure (mmHg) — 762, temperature (deg C) — 21.2; ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
- FGB Cabin: Pressure (mmHg) — 756, temperature (deg C) — 22.0; ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
- Node: Pressure (mmHg) — 748.98, temperature (deg C) — 23.8 (shell); ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
- U.S. Lab: Pressure (mmHg) — 750.78, temperature (deg C) — n/a, ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a;
- Joint Airlock (Equip. Lock): Pressure (mmHg) — 750.47, temperature (deg C) — n/a; shell heater temp (deg C) — 22.9, ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
- PMA-1: Shell heater temp (deg C) — 13.4.
- PMA-2: Shell heater temp (deg C) — 21.9.
(Note: Partial pressures ppO2 and ppCO2 in U.S. segment (USOS) not available because MCA [major constituent analyzer] is failed and in Extended Life mode [= a state that preserves mass spectrometer vacuum but produces no pp data]. Russian GA (gas analyzer) readings of ppCO2 in the SM are invalid).
Electrical Power Systems (EPS):
- Beta Gimbal Assembly (BGA) 2B in Autotrack mode, BGA 4B in Autotrack mode (during XPOP).
- SM batteries: all batteries (8) in “partial charge” mode.
- FGB battery #5 is offline; battery #2 is cycling; all other batteries (4) are in “partial charge” mode.
- Plasma Contactor Unit PCU-1 in Standby mode; PCU-2 in Standby mode.
Thermal Control Systems:
- Air conditioner SKV-1 is Off (Freon leak). SKV-2 is On.
Command & Data Handling Systems:
- C&C-1 MDM is prime, C&C-2 is back-up, and C&C-3 is in standby, all with new R2 s/w.
- GNC-2 MDM is prime; GNC-1 is back-up, with R1 s/w.
- LA-1, LA-2 and LA-3 MDMs are all operating.
- APS-1 (automated payload switch #1) and APS-2 are both On.
- SM Terminal Computer (TVM): 3 redundant lanes (of 3) operational.
- SM Central Computer (TsVM): 2 redundant lanes (of 3) operational.
Communications Systems:
- S-band is operating nominally.
- Ku-band is operating nominally in open loop pointing mode.
- Audio subsystem operating nominally.
- Video subsystem operating nominally.
- MCOR (medium-rate communications outage recorder) operating nominally.
Robotics:
- SSRMS/Canadarm2 at Port Stow position, with Keep Alive power on both strings.
- RWS (robotics workstations) are Off.