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ISS On-Orbit Status, 27-05-2004



 
 
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Old May 29th 04, 06:57 PM
Jacques van Oene
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Default ISS On-Orbit Status, 27-05-2004

ISS On-Orbit Status 27 May 2004

All ISS systems continue to function nominally except those noted
previously or below.

Progress 14P (M-249) docked successfully at the Service Module (SM) aft port
on time at 9:55am EDT. [The entire process of fully automated rendezvous,
closure, final approach and capture, followed by closing of "soft" hooks and
latches, went smoothly and without issues. The uncrewed cargo ship
approached from forward, starboard and nadir for the period from 1 km into
the beginning of flyaround at 9:29am. Final approach began at 9:48 from the
stern.]

After docking probe retraction (hard dock) and pressurization of the
Progress-to-SM interface vestibule, at 11:58am the crew conducted a one-hour
leak check of the tunnel, then opened the hatches at 1:00pm and installed
the quick-disconnect (QD) screw clamps.

After hatch opening, CDR Gennady Padalka used the Russian AK-1M sampler
instrument to perform the obligatory air sampling in the Progress before he
deactivated the cargo ship (at ~1:45pm) and installed the ventilation air
duct in the transfer tunnel.

Padalka also reconfigured the communications setup and deactivated the
Ku-band TV system used for covering the approach and docking, while Mike
Fincke demated the UOP (utility outlet panel) bypass power cable from the
RWS DCP (robotics workstation display & control panel).

Earlier in the morning, FE/SO Fincke had set up the joint US/Russian sound
level meter (SLM) in the cabin for subsequent acoustic survey ops for ~ 1.5
hrs. Later in the day, its recorded data were transferred to the medical
equipment computer (MEC). [These acoustic measurements are obtained once
per month at 41 locations in the Lab, Node, Airlock, FGB, SM and DC-1
modules. The SLM gives instantaneous noise levels and their frequency
spectra, which are transferred to the MEC laptop via an RS232 cable and
later downlinked with regular CHeCS (crew health care systems) data dump or
via OCA.]

The CDR conducted Part 2 of the three-part MBI-8 Profilaktika (preventive
health maintenance) fitness test series started yesterday for his first
time, today using the NS-01 load trainer on the VELO cycle ergometer,
supported by tag-up with medical support personnel at TsUP/Moscow. Science
Officer Fincke was available to assist as necessary. [This Russian fitness
test consists of four types of exercise, viz., neck tilting (back/forward),
simultaneous forearm flexing, trunk extension, and trunk flexes. Each type
of exercise consists of a series of 15 motions repeated two times. Load
levels are selected by the ground and do not change from test to test.
Total duration of the test is 13 min. Gas analysis, subjective evaluation
of physical exertion levels, and blood test for lactate and Creatine Kinase
levels are also performed as a part of this test, using the TEEM-100M gas
analyzer, AccuSport analyzer, and Reflotron-IV blood analyzer.]

Gennady completed the daily routine maintenance of the SM's SOZh life
support system (including ASU toilet facilities). He also conducted the
preparation of the regular inventory management system (IMS) "delta" file
for downlink.

Mike Fincke performed his daily physical exercise program on treadmill
(TVIS) and resistive exerciser (RED). Gennady's MBI-8 session again counted
against his obligatory daily exercise regimen.

14P's arrival increased ISS mass by ~6900 kg (15,200 lbs), with
approximately 2.5 tons of mixed cargo. The new mass properties and changes
to GPS (Global Positioning System) data were uplinked to the GNC MDMs
(guidance, navigation & control computers) in form of "pre-positioned load"
(PPL) files, for incorporation in the attitude control system (ACS).
[14P's mixed cargo includes propellants in the KDU thruster tanks (~600 kg
oxidizer & ~300 kg fuel) and in the SD refueling tanks (225 kg oxidizer &
128 kg fuel), gaseous oxygen (21 kg), air (24 kg, for dilution), and water
(420 kg).]

At 10:20am, after 14P docking and end of the free drift period after clamps
installation, ISS attitude was moded to LVLH XVV (local vertical/local
horizontal x-axis in velocity vector) and CMG control. Both U.S. P6 solar
array wings were rotated to Directed position ("blind", non solar-tracking
dual-angle mode with "night glider"/"sun slicer" 60 deg. drag reduction
sweep). [For a good explanation of ISS attitudes see
http://spaceflight.nasa.gov/station/..._attitude.html (uses Flash).]

Today's CEO (Crew Earth Observations) photo targets, limited in XPOP
attitude by flight rule constraints on the use of the science window, which
is available for only ~1/4 of each orbit when not facing forward (in "ram"),
were Aerosols, Bombay Region, India (although cities in the region report
onshore winds, there is widespread haze visible in NW India and over the
Indian Ocean. Looking right towards the coast to document any general haze,
especially if there are margins to the haze mass, and trying to include the
shoreline for ease of image location, look direction, etc.), Sobat Fans,
Sudan (comparison of recent ISS/CEO images with Landsat imagery of just a
decade ago shows much change, especially in fire scar pattern but also in
river courses, as expected on megafan rivers. To understand the regional
context of previous detailed (180 mm) imagery, the crew was requested to
shoot a mapping swath with near nadir overlapping images and a wide-angle
lens [to include as much territory as possible]. CEO imagery shows that
regional smoke haze reduces the usefulness of oblique views at this time of
year. Progress in understanding this most remote region is swift as a
result of CEO mapping sessions here), Tashkent, Uzbekistan (nadir pass.
Afternoon cloud buildup may remain restricted over the mountains behind [SE
of] this city of 2.1 million), and Aral Sea (a general view of this water
has not been seen in some months. The Aral is now completely bisected by
the central N-S island [smaller northern basins were severed from the system
in the 1980s]. Obliques looking right may allow imaging of the whole sea in
one view).

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 today, 1:27pm EDT).

Environmental Control and Life Support (ECLSS) and Thermal Control (TCS):

Elektron O2 generator is On. Vozdukh CO2 scrubber is On. U.S. CDRA CO2
scrubber is Off. TCCS (trace contaminant control subsystem) is operating.
SM Gas Analyzer has been calibrated and is used for ppO2 & ppCO2 monitoring.
MCA (major constituents analyzer) is in Life Extending Mode (LEM). BMP
Harmful Impurities unit: absorbent bed #1 in Purify mode, bed #2 in Purify
mode. RS air conditioner SKV-1 is Off, SKV-2 is On (SM panel mods completed
4/8; SKV-2 activation failed 4/20; currently running). SFOG slot #2 fan
suspect (not usable).


SM Working Compartment: Pressure (mmHg) -- 742; temperature (deg C) --
25.7; ppO2 (mmHg) -- 159.5; ppCO2 (mmHg) -- 3.6;
SM Transfer Compartment: Pressure (mmHg) -- 751; temperature (deg C) --
19.8.
FGB Cabin: Pressure (mmHg) -- 756; temperature (deg C) -- 22.0.
Node: Pressure (mmHg) -- 754.07; temperature (deg C) -- 23.9 (shell); ppO2
(mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
U.S. Lab: Pressure (mmHg) -- 756.33; temperature (deg C) -- 24.6; ppO2
(mmHg) -- n/a; ppCO2 (mmHg) -- n/a.
Joint Airlock (Equip. Lock): Pressure (mmHg) -- 756.53; temperature (deg
C) -- 24.5; shell heater temp (deg C) -- n/a, ppO2 (mmHg) -- n/a; ppCO2
(mmHg) -- n/a.


(n/a = data not available)


PMA-1: Shell heater temp (deg C) -- n/a
PMA-2: Shell heater temp (deg C) -- n/a.

Electrical Power Systems (EPS):

Both P6 channels fully operational. BGA (beta gimbal assembly) 2B and 4B
both in Directed position ("blind", non solar-tracking dual-angle mode with
"night glider"/"sun slicer" 60 deg. drag reduction sweep).
SM batteries: All batteries (8) are on line in "Partial Charge" mode.
FGB batteries: Battery #5 is off line; battery #4 is in "Cycle" mode; all
other batteries (4) are on line in "Partial Charge" mode.
Plasma Contactor Unit PCU-1 is in Standby mode; PCU-2 is in Standby mode.

Command & Data Handling Systems:

C&C-1 MDM is prime, C&C-2 is backup, and C&C-3 is in standby.
GNC-2 MDM is prime; GNC-1 is backup.
INT-2 is operating; INT-1 is Off.
EXT-1 is On (primary), EXT-2 is Off (backup).
LA-1, LA-2 and LA-3 MDMs are all operating.
PL-1 MDM is Off; PL-2 MDM is Operational.
APS-1 (automated payload switch #1) and APS-2 are both On.
SM Terminal Computer (TVM): 2 redundant lanes (of 3) operational (string 1
dropped out 11/22/03).
SM Central Computer (TsVM): 2 redundant lanes (of 3) operational (string #3
dropped out 10/22/03).
FGB MDM-1 is Off (failed, 11/21/03); MDM-2 is Operational.

Propulsion System:

Total propellant load available: 3436 kg (7575 lb) as of 5/20/04; [SM(552)
+ FGB(2884) + Progress M-1(0)]. (Capability: SM -- 860 kg; FGB -- 6120 kg).

Attitude Control Systems:

2 CMGs on-line (CMG-1 failed, since 6/6/02; CMG-2's RPC-17 failed 4/21/04).
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).

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 (may require a mask).
Audio subsystem is operating nominally (IAC-1 is prime, IAC-2 is off).
Video subsystem operating nominally.
HCOR (high-rate communications outage recorder) is operating nominally.

Robotics:

SSRMS/Canadarm2 based at Lab PDGF/LEE A, operational on redundant string,
off on prime.
MBS: KA (keep alive) 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, 7:07am EDT [= epoch]):

Mean altitude -- 363.3 km
Apogee -- 367.4 km
Perigee -- 359.2 km
Period -- 91.8 min.
Inclination (to Equator) -- 51.6324 deg
Eccentricity -- 0.0006069
Solar Beta Angle -- 19.2 deg
Orbits per 24-hr. day -- 15.68
Mean altitude loss in last 24 hours -- 85 m
Revolutions since FGB/Zarya launch (Nov. '98) -- 31506


For more on ISS orbit and worldwide ISS naked-eye visibility dates/times,
see
http://www.hq.nasa.gov/osf/station/viewing/issvis.html


--
---------------------------

Jacques :-)

www.spacepatches.info



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