Status Report

ISS On-Orbit Status 1 Sep 2002

By SpaceRef Editor
September 1, 2002
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All ISS systems continue to function nominally, except as noted previously.   Today is Expedition Five’s 78th day.  Ahead: Week 13.

It’s Labor Day weekend day 2 for the crew, with an off-duty schedule.

The crew successfully completed the replacement of the SD (smoke detector) in EXPRESS Rack 2 (ER2).  The rotation of the ARIS (active rack isolation system) rack involved considerable work but went smoothly.

CDR Valeriy Korzun did the weekly collection of SP toilet flush and SVO water supply counter data for calldown to the ground.

He also performed the daily routine maintenance of the SOSh life support system, while FE-1 Peggy Whitson completed the regular autonomous payload status checkup.

Peggy and FE-2 Sergey Treschev had their weekly PFCs (private family conferences) via Ku- and S-band.

A retest of vacuum access jumper (VAJ) seals in the Lab for pressure leaks has been added to the crew’s task list as a new activity. [For the tests, the VAJ hoses connect the MPEV (manual pressure equalization valve) on the hatch to the forward PMA (pressurized mating adapter) and the PCA (pressure control assembly) in the Lab interior.  The leak checks will be performed with a Scopemeter one hour and six hours after the initial reading is taken; additional readings are taken prior to crew sleep, at crew wake and 24 hours after the initial reading.  Thus, the crew was advised to start the procedure in the morning.]

The Russian “Uragan” earth observation program today targeted the Elbrus mountains.

As a new item on the Russian task list, TsUP requested an inventory of available HDTV (high-density television) tapes.  In order to continue the Japanese/Russian HDTV video imaging for medical use, experimenters need to know how much blank tape is left on already partially used cassettes.

Today’s targets for the U.S. CEO (crew earth observations) program were Western Mediterranean Aerosols (atmospheric conditions are trapping smog from southern Europe in the Mediterranean basin [one of the most mountain-surrounded and hence smog-prone water bodies on the planet].  Crew to look left and right of track), Berlin, Germany (nadir and left of track.  ESC [electronic still camera] requested), Tashkent, Uzbekistan (nadir pass, ESC), Western Mediterranean Aerosols (smog buildup. Crew to look left and right), St. Louis, Missouri (nadir and left of nadir, ESC), Borneo fires (crew to look left for fires and right for possible combined smoke plumes), High Central Andean Glaciers (crew to photograph any ice-capped mountain ranges or volcanic peaks right of track. Lenses now flying can capture meaningful data on ice-cap area, a good long-term monitor of global warming).
CEO images can be viewed at the website

ISS Orbit (as of this afternoon, 2:48pm EDT [= epoch]):

  • Mean altitude — 390.5 km
  • Apogee — 401.0 km
  • Perigee — 380.0 km
  • Period — 92.4 min.
  • Inclination (to Equator) — 51.64 deg
  • Eccentricity — 0.0015529
  • Orbits per 24-hr. day — 15.59
  • Altitude decrease — 200 m (mean) in last 24 hours
  • Revolutions since FGB/Zarya launch (Nov. ’98) — 21597
  • Current Flight Attitude — XPOP (x-axis perpendicular to orbit plane = “sun-fixed” [yaw: -0.5 deg, pitch: -5.7 deg., roll: 0 deg]). Will remain in XPOP until solar Beta drops below -10 deg on 9/6.

For more on ISS orbit and worldwide naked-eye visibility dates/times, see

SpaceRef staff editor.