Status Report

NASA Space Station On-orbit Status 20 July 2004

By SpaceRef Editor
July 20, 2004
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NASA Space Station On-orbit Status 20 July 2004

SpaceRef note: This NASA Headquarters internal status report, as presented here, contains additional, original material produced by (copyright © 2004) to enhance access to related status reports and NASA activities.

All ISS systems continue to function nominally except those noted previously or below.   Today we’re commemorating with nostalgia the 35th
Anniversary of Apollo 11, first manned lunar landing.  And on ISS, with 94 days in space Expedition 9 today passed its halfway mark.  Congratulations on both shining jewels of Space Exploration!

The crew had several hours for stowing trash and excessed equipment on the Progress 14P cargo ship, slated for undocking on 7/30 (2:06am EDT).   [The transfers were supported by reference to the IMS (inventory management system) database.]

CDR Padalka performed another test of the data linkage between the Service Module (SM)’s KTsP1 (Central Post computer #1), and the TVM (Terminal Computer) and TsVM (Central Computer) systems, preparatory to the second attempt at uploading the 7.02 software upgrade on 7/22 (Thursday), after the failure of the first try on 7/15.

Previous Reports

ISS On-orbit Status [HQ]
ISS Status [JSC]
Shuttle Processing [KSC]

Fincke concluded the current maintenance cycle on EMU batteries #2045 & #2046 by initiating their 20-min. recharge in the Airlock’s BSA (Battery Storage Assembly).  Afterwards, the SSC (station support computer) laptop used for the automated procedure was reconfigured for nominal ops.

Gennady took the monthly sensor readings of the “Pille-MKS” radiation dosimetry experiment that has ten sensors placed at various locations in the RS (Russian segment; port cabin window, starboard cabin window, ASU toilet facility, control panel, etc.).  Pille dosage values are called down or downlinked via Regul Paket/Email or OCA.  (Last time done: 6/18).

Fincke today handled the daily routine inspection of the SM’s SOZh life support system, incl. ASU toilet facility replacements, while Padalka prepared the daily IMS “delta” file update, which has become a standard item on the discretionary Russian “job jar” task list.

At 8:55am EDT, Mike and Gennady supported an interactive 20-min. PAO exchange with CBS News (Bill Harwood, Peter King) on the occasion of today’s 35th
Apollo 11 anniversary, via Ku-band/video & S-band/Space-to-Ground audio.

The crew completed their daily 2.5-hr. physical exercise program on TVIS, RED exerciser and VELO cycle with load trainer.

At 11:15am, monitored by Moscow on Daily Orbit 2, the SM’s automated daily timeline sequencer (SPP) commanded the KDU thrusters of Progress 14P and the SM propulsion manifold #1 to inhibited mode, leaving station attitude to manifold #2, then commenced propellant transfer from Progress to the FGB high-pressure fuel & oxidizer tanks (BVDG, BVDO).   [Today’s activity transferred the props remaining after the first transfer on 7/13.  Altogether, 14P had delivered a mixed cargo that included ~600 kg oxidizer (NTO/nitrogen tetroxide) and ~300 kg fuel (UDMH/unsymmetrical dimethyl hydrazine) in the KDU tanks, 225 kg NTO and 128 kg UDMH in the SD refueling tanks, also gaseous oxygen (21 kg), air (24 kg, for dilution), and water (420 kg).]

Major upcoming events:

  • SSRMS maneuvers into EVA-10 obs position — 7/22 (Thursday afternoon);
  • Progress 14P undocks — 7/30 (2:06am EDT);
  • Orlan EVA-10 from DC-1 “Pirs” — 8/3 (Tuesday);
  • Progress 15P launches — 8/11 (1:01am EDT);
  • Progress 15P docks — 8/14 (2:05am EDT).

Previous NASA ISS On-orbit Status Reports can be found here. Previous NASA Space Station Status Reports can be found here. Previous NASA Space Shuttle Processing Status Reports can be found here. A collection of all of these reports and other materials relating to Return to Flight for the Space Shuttle fleet can be found here.

Today’s CEO (crew earth observation) photo targets, limited in the current 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 Internal waves, Aegean Sea (looking left for outer glint disc passing across the northern Aegean), Athens, Greece (nadir pass), Amazonian Fans, Brazil (cloudfree patch may hold: looking for white lines meandering through the rainforest.  These are ancient river courses that indicate a major inland delta first discovered from handheld imagery.  This one fan has allowed scientists to successfully predict the locations of several more in similar topographic positions, with many implications for landscape evolution and fish evolution studies), and Internal waves, Azores Islands – Mid Atlantic (this is the first time investigators have been able to ask for this site due to persistent cloudiness of the central Atlantic.  Looking left of track in open patches both S and N of the islands [island chain itself under cloud]).

CEO images can be viewed at these websites:

See also the website “Space Station Challenge” at:

To view the latest photos taken by the expedition 9 crew visit:

U.S. & Russian Segment Status  (as of today, 1:47pm 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 On, SKV-2 is Off (SM panel mods completed 4/8; SKV-2 activation failed 4/20; is still considered failed).  SFOG slot #2 fan suspect (not usable).
  • SM Working Compartment:  Pressure (mmHg) — 752; temperature (deg C) — 25.6; ppO2 (mmHg) — 162.7; ppCO2 (mmHg) — 3.4.
  • SM Transfer Compartment:  Pressure (mmHg) — 751; temperature (deg C) — 20.0.
  • FGB Cabin:  Pressure (mmHg) — 752; temperature (deg C) — 23.7.
  • Node:  Pressure (mmHg) — 745.8; temperature (deg C) — 23.5 (shell); ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
  • U.S. Lab:  Pressure (mmHg) — 747.6; temperature (deg C) — 24.4; ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
  • Joint Airlock (Equip. Lock):   Pressure (mmHg) — 747.8; temperature (deg C) — 25.3; shell heater temp (deg C) — n/a, ppO2 (mmHg) — n/a; ppCO2 (mmHg) — n/a.
  • (n/a = data not available)

Electrical Power Systems (EPS):

  • Both P6 channels fully operational.  BGA (beta gimbal assembly) 2B and 4B both in Autotrack (solar-tracking, “sun slicer”, i.e., drag reduction-biased by 47 deg).
  • SM batteries:  All batteries (8) are on line in “Partial Charge” mode.  
  • FGB batteries:  Battery #4 is off line; battery 6 is on line 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): 3 redundant lanes (of 3) operational.
  • SM Central Computer (TsVM): 3 redundant lanes (of 3) operational.
  • FGB MDM-1 is Off (failed, 11/21/03); MDM-2 is Operational.

Propulsion System:

  • Total propellant load available: 3864 kg (8519 lb) as of 7/15/04;  [SM(552) + FGB(3312) + Progress M(0)].  (Capabilities: SM — 860 kg; FGB — 6120 kg).

Attitude Control Systems:

  • 3 CMGs on-line (CMG-1 failed, since 6/6/02; CMG-2’s RPC-17 failed 4/21/04; was replaced 6/30/04).
  • 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), until 7/26, then LVLH XVV.

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.


  • 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 Location NOW

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ISS Orbit  (as of this morning, 7:06am EDT [= epoch]):

  • Mean altitude — 359.2 km
  • Apogee height — 363.4 km
  • Perigee height — 354.9 km
  • Period — 91.7 min.
  • Inclination (to Equator) —  51.63 deg
  • Eccentricity — 0.00063
  • Orbits per 24-hr. day — 15.70
  • Mean altitude loss in last 24 hours — 108 m
  • Revolutions since FGB/Zarya launch (Nov. ’98)  — 32354

For more on ISS orbit and worldwide ISS naked-eye visibility dates/times, see In addition, information on International Space Station sighting opportunities can be found at on NASA’s Human Spaceflight website. The current location of the International Space Station can be found at at NASA’s Marshall Space Flight Center. Additional satellite tracking resources can be found at

ISS Altitude History

Apogee height Mean AltitudePerigee height

ISS Altitude History

SpaceRef staff editor.