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2\25 ISS On-Orbit Status 25-02-2003
Part 2 of 2

Today's targets for the CEO (crew earth observations program) were 
Yellow River Delta (while smog may have been present, the crew 
otherwise had an excellent view this pass of this active delta system 
under winter, low discharge conditions. Looking left of track towards 
the coast to the northeast), Ganges River Delta (fine weather and good 
lighting conditions combined with a pass over the western corner of 
this target area to offer good views of this large complex delta 
system. Looking left of track for oblique views), Singapore (although 
the city may not have been visible this pass, the crew was to look 
right of track towards the big island of Sumatra where this year's 
fire season has gotten an early start, trying to spot smoke plumes and 
point sources), Eastern Mediterranean Smog (this descending pass 
offered multiple opportunities to document smog over the Po Valley, 
the Adriatic basin, the Balkan Peninsula, and the Aegean Sea. Trying 
for oblique and limb views to the left of track), and Western 
Mediterranean Dust (looking left of track along the Algerian and 
Tunisian coast for northward moving dust plumes).

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

U.S. and Russian Segment Status (as of 1:45pm EST).

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)
 -- 26.9; ppO2 (mmHg) -- 183.1; ppCO2 (mmHg) -- 2.2 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
 -- 20.5.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 21.0.
Node: Pressure (mmHg) -- 743.25; temperature (deg C) -- 24.3 (shell);
 ppO2 (mmHg) -- 167.3; ppCO2 (mmHg) -- 4.0.
U.S. Lab: Pressure (mmHg) -- 745.22; temperature (deg C) -- 21.8;
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 745.32; temperature
 (deg C) -- 22.1; shell heater temp (deg C) -- 24.1, ppO2 (mmHg)
 -- n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- 24.5
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 #4 is in "Cycle" mode (freshly installed); all
 other batteries (7) are in "Partial Charge" mode.
FGB batteries: Battery #1 is off line (replaced today); 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: -51.8 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, 7:17am EST [= epoch]):
Mean altitude -- 391.2 km
Apogee -- 399.4 km
Perigee -- 383.0 km
Period -- 92.38 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0012122
Orbits per 24-hr. day -- 15.59
Mean altitude loss in last 24 hours -- 70 m
Solar Beta Angle -- -51.8 deg (magnitude decreasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 24358

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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