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1\21 ISS On Orbit Status 21-01-2003
Part 2 of 2

U.S. and Russian Segment Status (as of 1:25pm EST).

Environmental Control and Life Support (ECLSS) and Thermal Control 
(TCS):  Elektron O2 generator is powered On (16 Amp mode). Vozdukh CO2 
scrubber is On. U.S. CDRA CO2 scrubber is Off. TCCS (trace contaminant 
control subsystem) is off. 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 Off, SKV-2 is 
Off.

SM Working Compartment: Pressure (mmHg) -- 753; temperature (deg C)
 -- 25.4; ppO2 (mmHg) -- 168.4; ppCO2 (mmHg) -- 0.8 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
 -- 20.0.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 22.3.
Node: Pressure (mmHg) -- 743.89; temperature (deg C) -- 24.0 (shell);
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 745.52; temperature (deg C) -- 23.1;
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 745.73, temperature
 (deg C) -- 21.9; shell heater temp (deg C) -- 22.6, ppO2 (mmHg)
 -- 167.1; ppCO2 (mmHg) -- 2.8.
PMA-1: Shell heater temp (deg C) -- 24.9
PMA-2: Shell heater temp (deg C) -- 14.2
(n/a = data not available)

Propulsion System (PS): Total propellant load available (SM + FGB +
Progress) -- 3689 kg (8133 lb) [as of 1/16/03].

Electrical Power Systems (EPS):
Both P6 channels fully operational. Beta Gimbal Assembly (BGA) 2B
 and BGA 4B both in Autotrack (sun-following) mode.
SM batteries (as of 3am): Battery #7 is off line (failed); all other
batteries (6) are in "Full Charge" mode.
FGB batteries (3am): Batteries #3 is offline (failed); 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-1 MDM is prime; GNC-2 is Backup (new patches loaded on both).
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 (diagnostic
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 down (as of 11/14).
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
Attitude -- U.S. SIGI-1
Angular rates -- U.S. RGA-1

Flight Attitude:
XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: -179.5 
deg, pitch: -8.8 deg., roll: 0 deg]), CMG/Thruster Assist Momentum 
Management).  Solar Beta Angle: 31.6 deg (magnitude increasing).

Communications & Tracking Systems:
FGB MDM-1 is powered Off; FGB MDM-2 is operating.
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.
HCOR (high-rate communications outage recorder) is operating
 nominally.

Robotics:
SSRMS/Canadarm2 based at Lab PDGF 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, 7:41am EST [= epoch]):
Mean altitude -- 389.1 km
Apogee -- 393.0 km
Perigee -- 385.2 km
Period -- 92.34 min.
Inclination (to Equator) -- 51.64 deg
Eccentricity -- 0.0005784
Orbits per 24-hr. day -- 15.59
Altitude loss -- 175 m (mean) in last 24 hours
Solar Beta Angle -- 31.6 deg (magnitude increasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 238412

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

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