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1\27 ISS On-Orbit Status 27-01-2003
Part 2 of 2

Today's targets for the CEO (crew earth observations program) were 
Perth, Australia (looking a touch left for this coastal conurbation), 
Mekong River Delta (large deltas are changing ever faster as 
agriculture upstream expands in area. Agricultural disturbance of soil 
releases topsoil into rivers, with consequences that are only just 
beginning to be understood. We do know that delta islands change shape 
and grow as these processes continue to operate.  Detailed views of 
delta islands are thus requested), Ho Chi Minh City, Vietnam (looking 
right of track on the easternmost branch of the Mekong River delta 
about ten miles in from the sea), Cape Town, South Africa (looking 
left for contextual views of this port city at the north end of the 
Cape Peninsula), Industrialized SE Africa haze (high atmospheric 
pressure is setting in so that haze should be visible both sides of 
track. Southern Africa is the greatest generator of haze in the 
southern hemisphere.  Obliques to the right may reveal vertical 
stratification, thicker haze over the plateau and thinner haze over 
the Lesotho Highlands), Johannesburg, South Africa (looking mainly 
left of track for views of the central zone of this 150-mile-long 
megacity), Patagonian Glaciers (nadir views of glacier tongues were 
requested), and High Central Andean Glaciers (looking left and right 
for any ice-capped volcanoes. These tropical ice caps are melting at 
unprecedented rates under present conditions.

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 (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)
 -- 24.3; ppO2 (mmHg) -- 160.9; ppCO2 (mmHg) -- 2.5 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
 -- 19.3.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 21.7.
Node: Pressure (mmHg) -- 741.34; temperature (deg C) -- 22.9 (shell);
 ppO2 (mmHg) -- 163.8; ppCO2 (mmHg) -- 5.8.
U.S. Lab: Pressure (mmHg) -- 743.91; temperature (deg C) -- 22.6;
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 744.01; temperature
 (deg C) -- 21.8; shell heater temp (deg C) -- 21.9, ppO2 (mmHg)
 -- n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- 23.5
PMA-2: Shell heater temp (deg C) -- 17.9
(n/a = data not available)

Propulsion System (PS): Total propellant load available (SM + FGB +
Progress) -- 3669 kg (8089 lb) [as of 1/23/03]. (Capability: SM -- 870 
kg; FGB -- 6160 kg).

Electrical Power Systems (EPS):
Both P6 channels fully operational. Beta Gimbal Assembly (BGA) 2B and
 BGA 4B both in dual-angle mode (directed position).
SM batteries: Battery #7 is off line (failed); all other batteries
 (7) are in "Full Charge" mode.
FGB batteries (3am): Battery #2 is offline; 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 11/14/02).
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
Attitude -- U.S. SIGI-1
Angular rates -- U.S. RGA-1

Flight Attitude:
LVLH TEA (local vertical/local horizontal = "earth-fixed": z-axis in
 local vertical, x-axis in velocity vector [yaw: -10 deg, pitch:
 -9.1 deg, roll: 0 deg]), CMG/Thruster Assist Momentum Management).
Solar Beta Angle: 25.3 deg (magnitude decreasing).

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 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, 8:18am EST [= epoch]):
Mean altitude -- 388.2 km
Apogee -- 392.0 km
Perigee -- 384.4 km
Period -- 92.32 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0005623
Orbits per 24-hr. day -- 15.60
Altitude loss -- 120 m (mean) in last 24 hours
Solar Beta Angle -- 25.3 deg (magnitude decreasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 23906

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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