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

27 Mar 2003

FOR OFFICIAL USE ONLY

ISS On-Orbit Status 3/26/03

Part 2 of 2

Today's CEO (crew earth observations) targets, currently restricted
by flight rule constraints limiting the use of the science window in
the Lab, were Angolan Biomass Burning (with remarkably clear weather
conditions over Angola and Namibia this pass, the crew was to look
left of track for views of burns scars from previous seasons), and
Nairobi, Kenya (even though good views of the Kenyan capital are not
possible this pass, the crew was asked to look right of track for the
small target of Mount Kilimanjaro and to try for as tight a view as
possible of the small, retreating ice fields on this isolated
volcanic peak). 

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 12:45pm EST).

Environmental Control and Life Support (ECLSS) and Thermal Control
(TCS): Elektron O2 generator is powered On (24 Amp). 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) -- 745; temperature (deg C)
-- 27.2; ppO2 (mmHg) -- 183.1 (suspect); ppCO2 (mmHg) -- 2.4 (data
suspect). SM Transfer Compartment: Pressure (mmHg) -- 751;
temperature (deg C) -- 20.9.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 23.0.
Node: Pressure (mmHg) -- 739.44; temperature (deg C) -- 23.4 (shell);
ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 741.79; temperature (deg C) -- 22.3;
ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 741.89; temperature
(deg C) -- 21.5; shell heater temp (deg C) -- 22.1, ppO2 (mmHg) --
165.6; ppCO2 (mmHg) -- 4.0.
PMA-1: Shell heater temp (deg C) -- 23.7
PMA-2: Shell heater temp (deg C) -- 12.2
(n/a = data not available)

Propulsion System (PS):
Total propellant load available [SM(774) + FGB(2746) + Progress(474]
--- 3994 kg (8805 lb) as of 3/20/03. (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 Directed Position (278 deg & 82 deg) to minimize
aerodynamic drag. SM batteries: Battery #8 is in "Cycle" mode; all
other batteries (7) are in "Partial Charge" mode.
FGB batteries: Battery #2 is off line; 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): 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:
XPOP (x-axis perpendicular to orbit plane = "sun-fixed" [yaw: -179.0
deg, pitch: -8.8 deg., roll: 0 deg]), with CMG TA (thruster assist)
Momentum Management.
Solar Beta Angle: 49.5 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 Lab 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, 6:49am EST [= epoch]):
Mean altitude -- 390.0 km
Apogee -- 395.7 km
Perigee -- 384.4 km
Period -- 92.36 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0008381
Orbits per 24-hr. day -- 15.59
Solar Beta Angle: 49.5 deg (magnitude decreasing)
Mean altitude loss in last 24 hours -- 80 m
Revolutions since FGB/Zarya launch (Nov. '98) -- 24810

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
---