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19 Jun 2003

ISS On-Orbit Status 17 Jun 2003

Part 2 of 2

Today's CEO (crew earth observation) targets, no longer limited in
the current LVLH attitude and including the targets of the Lewis &
Clark 200-year memorial locations, were Lake Nasser, Toshka Lakes
(the crew had a good pass to look right of track for a mapping view
of the record high water levels in Lake Nasser and the Nile River),
Eastern Mediterranean Smog (on this descending pass in fading light
towards the Middle East, the crew was to look right of track over the
eastern Med towards the Egyptian coast and the Nile Delta. The ground
is interested in views of sunlit aerosol layers enhanced over the
darker water), Western Mediterranean Dust and Smog (as a cold front
plows into the Iberian Peninsula from the west, strong southerly
winds over Algeria are expected to lift dust northward over the
western Med. As the ISS crossed northern Spain, the crew was to start
looking obliquely right of track for sunlit dust plumes), Wichita
River (the ISS approached this target with fair weather and good
illumination from the southwest. Looking just right of track to
document land use and stream patterns between the city of Wichita
Falls and the Red River), and The Dalles (LEWIS & CLARK SITE: As ISS
passed over southern Washington, the crew was to try to look right of
track and map the lower Columbia River. Of particular interest is the
area known as The Dalles, a great southward arch in the river before
it cuts through the Cascade Range). CEO images can be viewed at the
websites http://eol.jsc.nasa.gov http://earthobservatory.nasa.gov See
also the website "Space Station Challenge" at
http://voyager.cet.edu/iss/

U.S. and Russian Segment Status (as of 1:54pm EST).

Environmental Control and Life Support (ECLSS) and Thermal Control
(TCS): Elektron O2 generator is powered On (16 amp mode). Vozdukh CO2
scrubber is On (manual mode 3). 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)
-- 28.5; ppO2 (mmHg) -- data invalid; ppCO2 (mmHg) -- data invalid.
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C)
-- 20.7.
FGB Cabin: Pressure (mmHg) -- 752; temperature (deg C) -- 21.7.
Node: Pressure (mmHg) -- 745.80; temperature (deg C) -- 24.1 (shell);
ppO2 (mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 747.95; temperature (deg C) -- 23.1;
ppO2 (mmHg) -- 172.4; ppCO2 (mmHg) -- 4.3.
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 748.05; temperature
(deg C) -- 29.5; shell heater temp (deg C) -- 24.6, ppO2 (mmHg) --
n/a; ppCO2 (mmHg) -- n/a.
PMA-1: Shell heater temp (deg C) -- 25.1.
PMA-2: Shell heater temp (deg C) -- 14.6.

(n/a = data not available)

Propulsion System (PS):

Total propellant load available: 3832 kg (8448 lb) as of 6/12
[SM(774) + FGB(2476) + Progress M(182) +Progress M-1(400)].
(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 AutoTrack.
SM batteries: Battery #4 is disconnected; all other batteries (7) are
in "Partial Charge" mode.
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: -9.0 deg., roll: 0 deg]), with CMG TA (thruster assist).
Management. Solar Beta angle: -24.5 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 (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 and mated at WS4.
POA: KA power on both strings.
RWS (robotics workstations): Lab RWS is On (DCP connected); Cupola
RWS is Off.

ISS Orbit (as of this morning, 7:45am EDT [= epoch]):

Mean altitude -- 388.7 km
Apogee -- 393.1 km
Perigee -- 384.2 km
Period -- 92.33 min.
Inclination (to Equator) -- 51.63 deg
Eccentricity -- 0.0006537
Orbits per 24-hr. day -- 15.60
Solar Beta Angle -- -24.5 deg (magnitude increasing)
Mean altitude loss in last 24 hours -- 300 m
Revolutions since FGB/Zarya launch (Nov. '98) -- 26105
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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