This Echo is READ ONLY !   NO Un-Authorized Messages Please!
 ~~~~~~~~~~~~~~~~~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

7 June 2003

ISS On-Orbit Status 6 Jun 2003

Part 2 of 2

Today's CEO (crew earth observation) 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 (crew was asked to shoot fires and
smoke, left and right of track. Okavango River delta [green
triangular swamps] just left of track.  Glint opportunity. Shooting
nearby complex river patterns after this, also left of track),
Angolan Biomass Burning (opportunity to document aerosol "exhaust"
zone over the central Angolan coastline:  wind direction and smoky
atmosphere are appropriate.  Looking right towards the coast.
Experts enthusiastic for first views of this phenomenon), Beijing
metropolitan region (opportunity for a shot of the whole
Beijing-Tianjin region.  Left of track 1-3 degrees), Lake Nasser,
Egypt (sun glint opportunity to shoot both Lake Nasser and the new
lakes just beyond), Eastern Mediterranean Aerosol (visibility in
Venice is down to 2-6 miles.  Looking left for smog in the Po River
valley and right for views of the smog mass in the Adriatic Sea), and
Lower Amazon River Basin (weather improving.  Looking right of track
to document coastlines of this vast estuary). 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 1:15pm 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)
-- 27.4; 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) -- 21.7.
Node:  Pressure (mmHg) -- 745.16; temperature (deg C) -- 23.5
(shell); ppO2 (mmHg) -- 171.8; ppCO2 (mmHg) -- 4.0.
U.S. Lab:  Pressure (mmHg) -- 746.74; temperature (deg C) -- 23.2;
ppO2 (mmHg) -- 171.6; ppCO2 (mmHg) -- 4.0.
Joint Airlock (Equip. Lock):  Pressure (mmHg) -- 746.84; temperature
(deg C) -- 28.4; shell heater temp (deg C) -- 24.1, ppO2 (mmHg) --
n/a; ppCO2 (mmHg) --n/a.
PMA-1:  Shell heater temp (deg C) -- 25.2.
PMA-2:  Shell heater temp (deg C) -- 16.1.

(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); 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 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.
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:  13.7 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, 2:51am EDT [= epoch]):

Mean altitude -- 389.8 km
Apogee -- 394.2 km
Perigee -- 385.4 km
Period -- 92.35 min.
Inclination (to Equator) --  51.63 deg
Eccentricity -- 0.0006535
Orbits per 24-hr. day -- 15.59
Solar Beta Angle -- 13.7 deg (magnitude decreasing)
Mean altitude loss in last 24 hours -- 110 m
Revolutions since FGB/Zarya launch (Nov. '98)  -- 25930
For more on ISS orbit and worldwide naked-eye visibility dates/times,
see http://www.hq.nasa.gov/osf/station/viewing/issvis.html

 - END OF FILE -
==========

@Message posted automagically by IMTHINGS POST 1.30
---