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2\21 ISS On-Orbit Status 21-02-2003
Part 2 of 2

U.S. and Russian Segment Status (as of 1:15pm EST).

Environmental Control and Life Support (ECLSS) and Thermal Control 
(TCS):  Elektron O2 generator is powered On (24 Amp mode). Vozdukh CO2 
scrubber is Off. U.S. CDRA CO2 scrubber is On (single-bed mode). 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)
 -- 25.0; ppO2 (mmHg) -- 183.1; ppCO2 (mmHg) -- 2.5 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
 -- 20.7.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 23.7.
Node: Pressure (mmHg) -- 745.16; temperature (deg C) -- 24.0 (shell);
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 747.04; temperature (deg C) -- 22.4;
 ppO2 (mmHg) -- 170.2*; ppCO2 (mmHg) -- 3.8*;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 747.14; temperature
 (deg C) -- 20.9; shell heater temp (deg C) -- 22.5, ppO2 (mmHg)
 -- n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- 24.3
PMA-2: Shell heater temp (deg C) -- 11.8
(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 #6 is in "Cycle" mode (freshly installed); all
 other batteries (7) are in "Partial Charge" mode.
FGB batteries: Battery #1 is off line; battery #6 is in "Cycle" mode;
 all other batteries (4) are in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 and PCU-2 both in Standby mode.

Command & Data Handling Systems:
C&C-3 MDM is prime, C&C-1 is back-up, and C&C-2 is in standby.
GNC-1 MDM is prime; GNC-2 is Backup.
INT-2 is operating; INT-1 is in standby.
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 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: -62.0 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, 7:34am EST [= epoch]):
Mean altitude -- 391.6 km
Apogee -- 399.8 km
Perigee -- 383.4 km
Period -- 92.39 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0012049
Orbits per 24-hr. day -- 15.59
Mean altitude loss in last 24 hours -- 90 m
Solar Beta Angle -- -62.0 deg (magnitude decreasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 24296

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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