July 27, 2010
ISS On-Orbit Status 07/27/10

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

Today’s sleep/wake cycle:
  • Wake last night – 2:40pm EDT; sleep – 11:00am today (until 2:00am tomorrow morning).

The Russian Orlan EVA-25 spacewalk by FE-3 Mikhail Kornienko & FE-5 Fyodor Yurchikhin began at 12:11am EDT (26 min behind schedule) and lasted 6h 42min, concluding successfully at 6:53am. Attitude control authority was handed over to Russian MCS (Motion Control System) thrusters at 9:25pm and returned to U.S. momentum management at ~12:05am. All scheduled objectives were completed.

The two spacewalkers –
  • Replaced the ATV (Automated Transfer Vehicle) Klest-154 video camera,
  • Routed and mated external KURS-P AFU (Antenna Feeder Device) MRM1-to-FGB cables to the FGB,
  • Routed and mated SUBA (Onboard Equipment Control System) Ethernet cables to the SM (Service Module),
  • Jettisoned the old camera, and
  • Brought the MRM1 cable reels back inside the ISS (instead of jettisoning them as originally planned).
[The new SM ATV video camera that was installed was checked out successfully. The KURS cables have not yet been tested but Moscow plans to do that later this week. During the EVA, several objects were detected floating away from the ISS. One was tentatively identified as a cable clamp. The videos are being reviewed by the Russians to determine the identity of the other objects.]

After conclusion of EVA-25 at ~6:53am, Mikhail & Fyodor –
  • Repressurized the SM PkhO transfer compartment,
  • Conducted their second MO-9 “Urolux” biochemical urine test,
  • Reset STTS communications in the SM/PkhO,
  • Re-installed the air duct through the PkhO hatch,
  • Restored systems configurations in the SM to pre-EVA conditions, and
  • Set up the Orlan-MK suits, umbilicals and BSS interface units for drying out.

CDR Skvortsov, who remained isolated in the MRM2 during EVA-25 with Tracy Caldwell-Dyson, -
  • Opened the MRM2-to-SM(SU) hatches,
  • Installed the air ducts in SM, MRM2 and DC1,
  • Supported the ground-commanded reactivation of the Russian Elektron O2 generator by monitoring the external temperature of its secondary purification unit (BD) for the first 10 minutes of operations to ensure that there was no overheating [the gas analyzer used on the Elektron during nominal operations for detecting hydrogen (H2) in the O2 line (which could cause overheating) is not included in the control algorithm until 10 minutes after Elektron startup], and
  • Completed post-EVA MRM2 reconfiguration to nominal and Soyuz TMA-18/22S deactivation.

FE-2 Caldwell-Dyson, after the EVA, -
  • Relocated the SSC18 (Station Support Computer 18) laptop from MRM2 to its nominal plug-in location in the Cupola & returned batteries to deployed SSCs, and
  • Returned stowage equipment, CTBs (Cargo Transfer Bags) and other required hardware from the MRM2 to their nominal locations for reconfiguration.

No CEO photo targets uplinked for today.

ISS Orbit (as of this morning, 7:50am EDT [= epoch])
Mean altitude – 355.0 km
Apogee height – 360.2 km
Perigee height – 349.8 km
Period -- 91.64 min.
Inclination (to Equator) -- 51.65 deg
Eccentricity -- 0.0007697
Solar Beta Angle -- -31.4 deg (magnitude decreasing)
Orbits per 24-hr. day -- 15.71
Mean altitude loss in the last 24 hours – 41 m
Revolutions since FGB/Zarya launch (Nov. 98) – 66,981.

Significant Events Ahead (all dates Eastern Time and subject to change):
--------------Six-crew operations-----------------
08/05/10 -- US EVA-15 (Caldwell/Wheelock)
09/07/10 -- Progress M-06M/38P undock
09/08/10 -- Progress M-07M/39P launch
09/10/10 -- Progress M-07M/39P docking
09/24/10 -- Soyuz TMA-18/22S undock/landing (End of Increment 24)
--------------Three-crew operations-------------
10/08/10 -- Soyuz TMA-20/24S launch – Kelly (CDR-26)/Kaleri/Skripochka
10/10/10 -- Soyuz TMA-20/24S docking
--------------Six-crew operations-------------
10/26/10 -- Progress M-05M/37P undock
10/27/10 -- Progress M-08M/40P launch
10/29/10 -- Progress M-08M/40P docking
11/01/10 -- STS-133/Discovery launch (ULF5 – ELC4, PMM) ~4:33pm EDT“target”
11/10/10 -- Russian EVA-26
11/17/10 -- Russian EVA-27
11/26/10 -- Soyuz TMA-19/23S undock/landing (End of Increment 25)
--------------Three-crew operations-------------
12/10/10 -- Soyuz TMA-21/25S launch – Kondratyev (CDR-27)/Coleman/Nespoli
12/12/10 -- Soyuz TMA-21/25S docking
--------------Six-crew operations-------------
12/15/10 -- Progress M-07M/39P undock
12/xx/10 -- Russian EVA-28
12/26/10 -- Progress M-08M/40P undock
12/27/10 -- Progress M-09M/41P launch
12/29/10 -- Progress M-09M/41P docking
02/02/11 -- STS-134/Endeavour (ULF6 – ELC3, AMS-02) ~4:19pm EDT“target”
03/16/11 -- Soyuz TMA-20/24S undock/landing (End of Increment 26)
--------------Three-crew operations-------------
03/30/11 -- Soyuz TMA-22/26S launch – A. Borisienko (CDR-28)/R, Garan/A.Samokutayev
04/01/11 -- Soyuz TMA-22/26S docking
--------------Six-crew operations-------------
04/26/11 -- Progress M-09M/41P undock
04/27/11 -- Progress M-10M/42P launch
04/29/11 -- Progress M-10M/42P docking
05/16/11 -- Soyuz TMA-21/25S undock/landing (End of Increment 27)
--------------Three-crew operations-------------
05/31/11 -- Soyuz TMA-23/27S launch – M. Fossum (CDR-29)/S. Furukawa/S. Volkov
06/01/11 -- Soyuz TMA-23/27S docking
--------------Six-crew operations-------------
06/21/11 -- Progress M-11M/43P launch
06/23/11 -- Progress M-11M/43P docking
08/30/11 -- Progress M-12M/44P launch
09/01/11 -- Progress M-12M/44P docking
09/16/11 – Soyuz TMA-22/26S undock/landing (End of Increment 28)
--------------Three-crew operations-------------
09/30/11 -- Soyuz TMA-24/28S launch
10/02/11 – Soyuz TMA-24/28S docking
--------------Six-crew operations-------------
10/20/11 -- Progress M-10M/42P undocking
10/21/11 -- Progress M-13M/45P launch
10/23/11 -- Progress M-13M/45P docking
11/16/11 -- Soyuz TMA-23/27S undock/landing (End of Increment 29)
--------------Three-crew operations-------------
11/30/11 -- Soyuz TMA-25/29S launch
12/02/11 -- Soyuz TMA-25/29S docking
--------------Six-crew operations-------------
12/??/11 -- 3R Multipurpose Laboratory Module (MLM) w/ERA – on Proton.
12/26/11 -- Progress M-13M/45P undock.