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

12 Apr 2003

ISS On-Orbit Status 11 Apr 2003

Part 2 of 2

Today's CEO (crew earth observations) targets, including
near-vertical targets from the city target list due to the current
LVLH attitude, were Cape Town, South Africa (nadir pass; ESC
[electronic still camera]), Johannesburg, South Africa (nadir pass;
ESC), Alexandria, Egypt (nadir and a touch right; ESC), Tigris-
Euphrates, Turkey (new lakes are being built on the upper Euphrates
just right of track.  Irrigation patterns surrounding the new lakes
are expanding fast), High Central Andean Glaciers (thunderstorms have
moved north:  crew was to try for detailed views of volcano-top ice
pack.  Looking near nadir both sides of track.  The 400mm lens was
ideal for documentation of ice area in the effort to detect change as
numerous tropical ice fields melt back), Tucson, Arizona (nadir pass;
ESC), Albuquerque, New Mexico (nadir pass; ESC), Ice on eastern Lake
Superior (Dynamic event:  accumulation of ice in the downwind bays at
the east end of Lake Superior), Newfoundland ice (Dynamic event:
continued good weather should reveal the marked accumulation of sea
ice against the west side of the Newfoundland peninsula.  Crew
looking nadir and west) and American Samoa (shooting detail of the
surrounding coral reefs. American Samoa is the center of Polynesia in
the triangle Hawaii-Tahiti-New Zealand). CEO images can be viewed at
the websites http://eol.jsc.nasa.gov and
http://earthobservatory.nasa.gov

U.S. and Russian Segment Status (as of 1:55pm 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) -- 735; temperature (deg C)
-- 27.4; ppO2 (mmHg) -- data invalid; ppCO2 (mmHg) -- data invalid.
SM Transfer Compartment:  Pressure (mmHg) -- 751; temperature (deg C)
-- 19.5.
FGB Cabin:  Pressure (mmHg) -- 759; temperature (deg C) -- 19.6.
Node:  Pressure (mmHg) -- 742.62; temperature (deg C) -- 21.9
(shell); ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab:  Pressure (mmHg) -- 744.51; temperature (deg C) -- 22.2;
ppO2 (mmHg) -- 168.9; ppCO2 (mmHg) -- 2.2;
Joint Airlock (Equip. Lock):  Pressure (mmHg) -- 744.61; temperature
(deg C) -- 22.8; shell heater temp (deg C) -- 23.4, ppO2 (mmHg) --
n/a; ppCO2 (mmHg) -- n/a.
PMA-1:  Shell heater temp (deg C) -- 22.6
PMA-2:  Shell heater temp (deg C) -- 21.1

(n/a = data not available)

Propulsion System (PS):

Total propellant load available: 3798 kg (8373 lb) as of 4/10/03
[SM(774) + FGB(2670) + Progress(354)].  (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 dual-angle "directed" mode (eclipse drag reduction
configuration, "night glider").
SM batteries:  Battery #5 is in "Cycle" mode; all other batteries (7)
are in "Partial Charge" mode.
FGB batteries:  Battery #5 is disconnected; all other batteries (5)
are in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 and PCU-2 both in Standby mode (after the
EVA)

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-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): 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-2

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]), with CMG/ TA (thruster assist) Momentum
Management). Solar Beta Angle: -13.4 deg (magnitude increasing).

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; VTR2
troubleshooting in work).
HCOR (high-rate communications outage recorder) is operating
nominally.

Robotics:

SSRMS/Canadarm2 based at MBS PDGF 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, 7:48am EDT [= epoch]):

Mean altitude -- 393.2 km
Apogee -- 398.1 km
Perigee -- 388.4 km
Period -- 92.42 min.
Inclination (to Equator) --  51.63 deg
Eccentricity -- 0.0007152
Orbits per 24-hr. day -- 15.58
Solar Beta Angle:  -13.4 deg (magnitude increasing)
Mean altitude loss in last 24 hours -- 140 m
Revolutions since FGB/Zarya launch (Nov. '98)  -- 25060
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
---