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1\31 ISS On-Orbit Status 31-01-2003
Part 2 of 2

As reported before, the four valves and the electronics inside the P1 
ETCS NTA (external thermal control system/nitrogen tank assembly) with 
boith Loop B heaters failed are operating well. Analysis is now 
concentrating on determining the temperatures to be expected for the 
NTA over the next few weeks. Preliminary data indicate that keeping 
the interior electronics operating may generate enough heat to prevent 
hardware problems.

Readiness review for the new C&C (command & control) software upgrade 
R.3 will be conducted at JSC on 2/5 (Wednesday), with Russian 
participation.  Prior to the R.3 upload, Moscow will upload the new 
Russian patch 5.04, followed by the 7.01 patch after the R.3 upload.

STS-107/Columbia is scheduled to land at KSC tomorrow (Saturday) at 
9:16am EST.

Today's targets for the CEO (crew earth observations program) were 
Irrawaddy River Delta, Burma (nadir pass. Sun glint opportunity left 
of track on inner delta waterways), Rangoon, Burma (nadir pass. The 
city lies on an east-side arm of the delta), Bombay, India (a touch 
left of track. The city lies on the one major bay on India's otherwise 
linear west coast. Oblique views left may reveal aerosol masses 
related to this large city), Nairobi, Kenya (nadir pass; ESC 
[electronic still camera]), Patagonian Glaciers (southern end of the 
twin ice fields is likely to remain clear of cloud. Crew was to try 
for glacier tongues on both sides of the Andes, especially the Pacific 
side where coverage is poorer), Central Africa (Dynamic event. 
Equatorial cloud masses lie further south over Africa at the height of 
"southern summer" than in any other part of the globe. Numerous fires 
are raging in the Sahel savannas. Looking obliquely left and right of 
track. Also, there was an opportunity to document enigmatic river 
patterns in the vast Salamat swampland of the Central African 
Republic), West Africa Fires (Dynamic event. Numerous fires are raging 
in the Sahel. Looking obliquely left and right of track. Oblique 
images of the coastline and rainforest-savanna boundary were also 
requested under present clear skies), Panama panorama (Dynamic event. 
Clear winter skies should allow a left-looking view north up the 
central American isthmus. Requested was a long panorama in this seldom 
imaged part of the world), and Puerto Rico (fringing coral reef 
mapping images were requested for near nadir reefs on the west end of 
the island).

CEO images can be viewed at the website http://eol.jsc.nasa.gov

U.S. and Russian Segment Status (as of 2:00pm EST).

Environmental Control and Life Support (ECLSS) and Thermal Control 
(TCS):  Elektron O2 generator is powered On (32 Amp mode). Vozdukh CO2 
scrubber is Off. 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) -- 753; temperature (deg C)
 -- 23.1; ppO2 (mmHg) -- 160.4; ppCO2 (mmHg) -- 2.5 (suspect).
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
 -- 19.1.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 22.3.
Node: Pressure (mmHg) -- 738.16; temperature (deg C) -- 22.6 (shell);
 ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 740.27; temperature (deg C) -- 22.7;
 ppO2 (mmHg) -- 162.9; ppCO2 (mmHg) -- 3.4;
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 740.37; temperature
 (deg C) -- 20.0; shell heater temp (deg C) -- 20.8, ppO2 (mmHg)
 -- n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- 22.7
PMA-2: Shell heater temp (deg C) -- 18.4
(n/a = data not available)

Propulsion System (PS): Total propellant load available [SM(820) + 
FGB(2898) + Progress(0)] -- 3718 kg (8197 lb) as of 1/30/03. 
(Capability: SM -- 860 kg; FGB -- 6120 kg).

Electrical Power Systems (EPS):
Both P6 channels fully operational. Beta Gimbal Assembly (BGA) 2B
 and BGA 4B both in "blind" dual-angle mode (directed position).
SM batteries: Battery #7 is off line (failed); battery #2 is offline
(ROM/capacity restoration mode); all other batteries (6) are in
 "Partial Charge" mode.
FGB batteries: 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 out of the set (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 (GPS)
Attitude -- U.S. SIGI-1 (GPS)
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/TA (thruster assist) momentum management).
Solar Beta Angle: 12.2 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, but VTR1 is off.
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, 7:40am EST [= epoch]):
Mean altitude -- 387.6 km
Apogee -- 391.4 km
Perigee -- 383.9 km
Period -- 92.31 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0005582
Orbits per 24-hr. day -- 15.60
Mean altitude loss in last 24 hours -- 200 m
Solar Beta Angle -- 12.2 deg (magnitude decreasing)
Revolutions since FGB/Zarya launch (Nov. '98) -- 23968

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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