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ISS On-Orbit Status 2 June 2003

Part 2 of 2

Educational Payload Operations (EPO):  The ground appreciated the
crew's offer of another "take" and will be sending them words about
the dryrun. 

Crew Earth Observations (CEO):  No new imagery has been released for
the ground to review since last week.  However, the crew's dramatic
Anatahan Volcano image is on display on NASA's Earth Observatory
website. Today's CEO targets, limited in the current XPOP attitude by
flight rule constraints on the use of the Lab nadir/science window,
also excluding any night target viewing, were Congo-Zimbabwe Biomass
Burning (looking left and right of track as the ISS passed over
western Zambia), SW Brazil biomass burning (Dynamic event.  Fires and
smoke palls have been making the news.  Looking left and right of
track for oblique views), High Central Andean Glaciers (nadir
opportunity to document small ice caps on the tops of any tropical
volcanoes under track), Taiwan Smog (looking right and left to
document any sharp margins in the haze mass), Beijing, China (views
right for the metropolitan region.  Obliques for any haze buildup),
Eastern Mediterranean Aerosol (conditions even better to document a
haze event in the Adriatic Sea, between Italy and the Balkans), and
Eastern Mediterranean Aerosol (nadir pass over the Po River valley.
Looking south for obliques of the narrow Adriatic "channel"). CEO
images can be viewed at the websites http://eol.jsc.nasa.gov
http://earthobservatory.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 (20 amp mode).  Vozdukh CO2
scrubber is On (manual mode-5/day, mode-3/night).  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) -- 742; temperature (deg C)
-- 26.9; ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
SM Transfer Compartment:  Pressure (mmHg) -- 751; temperature (deg C)
-- 21.4.
FGB Cabin:  Pressure (mmHg) -- 752; temperature (deg C) -- 23.3.
Node:  Pressure (mmHg) -- 745.8; temperature (deg C) -- 24.3 (shell);
ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab:  Pressure (mmHg) -- 747.54; temperature (deg C) -- 23.1;
ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
Joint Airlock (Equip. Lock):  Pressure (mmHg) -- 747.64; temperature
(deg C) -- 30.5; shell heater temp (deg C) -- 24.4, ppO2 (mmHg) --
171.9; ppCO2 (mmHg) -- 4.1.
PMA-1:  Shell heater temp (deg C) -- 24.2.
PMA-2:  Shell heater temp (deg C) -- 13.0.

(n/a = data not available)

Propulsion System (PS):

Total propellant load available: 3573 kg (7877 lb) as of 5/29
[SM(774) + FGB(2547) + Progress(252)].  (Capability: SM -- 860 kg;
FGB -- 6120 kg). 

Electrical Power Systems (EPS):

Both P6 channels fully operational.  BGA (beta gimbal assembly) 2B
and 4B both in autonomous Autotrack (45 deg biased for drag
reduction). SM batteries:  Batteries #4 is disconnected (failed);
battery #5 is in "Cycle" mode; all other batteries (6) are in "
Partial Charge" mode (battery #2 is exhibiting degraded performance).
FGB batteries:  Battery #4 is disconnected; all other batteries (5)
are in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 in Standby mode; PCU-2 in Discharge 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.
INT-1 is operating; INT-2 is Off.
EXT-2 is On (primary), EXT-1 is Off (both now upgraded to R3).
LA-1, LA-2 and LA-3 MDMs are all operating.
PL-2 MDM is Off; PL-1 MDM is Operational.
APS-1 (automated payload switch #1) and APS-2 are both On.
SM Terminal Computer (TVM): 3 redundant lanes (of 3) operational.
Being upgraded.
SM Central Computer (TsVM): 3 redundant lanes (of 3) operational.
Being upgraded.

Attitude Control Systems:

3 CMGs on-line (CMG-1 failed).
State vector source -- U.S. SIGI-1 (GPS)
Attitude source -- U.S. SIGI-1 (GPS)
Angular rate source -- RGA-1

Flight Attitude:

XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: 0.5
deg, pitch: -6.8 deg., roll: 0 deg]), with CMG TA (thruster assist).
Solar Beta angle:  31.9 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 (on string 2).
Ku-band is operating nominally.
Audio subsystem is operating nominally [IAC-1 (internal audio
controller #1)
being analyzed after self-test error.  IAC-2 is prime.]
Video subsystem operating nominally.
HCOR (high-rate communications outage recorder) is operating
nominally. 

Robotics:

SSRMS/Canadarm2 based at MBS PDGF #1 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, 5 :02am EDT [= epoch]):

Mean altitude -- 390.1 km
Apogee -- 394.5 km
Perigee -- 385.6 km
Period -- 92.36 min.
Inclination (to Equator) --  51.63 deg
Eccentricity -- 0.0006554
Orbits per 24-hr. day -- 15.60
Solar Beta Angle -- 31.9 deg (magnitude decreasing)
Mean altitude loss in last 24 hours -- 50 m
Revolutions since FGB/Zarya launch (Nov. '98)  -- 25869
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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