Status Report

ISS MER Daily Report 25 Apr 2001

By SpaceRef Editor
April 25, 2001
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Date: 4/25/01


STS 100/ISS 6A


GMT Day: 2001/115


Overall System Status:


  • SSRMS on Lab PDGF

  • Both PCUs in discharge

  • MCA is operational

  • Vozdukh is non-operational

  • MCOR is operational

  • Dual CCAA OPS

  • MCA in Auto Sampling Mode


C&DH:


SMCC: SMCC 1 & 2 , and 3 Operating in the Redundant set.


SMTC: 1 & 2 Operating in the Redundant Set


FGB MDM: FGB-2 ON/FGB-1 Off


N1-2 Primary/N1-1 Secondary


PV MDM: 4B Prime/2B Backup


C&C:C&C-1 Failed/C&C-2 Standby /C&C-3 Prime


INT: INT-2 Operating/INT-1OFF


GNC: GNC-1 Primary/GNC-2 Backup


LA: LA-1, LA-2 & LA-3 Operating


PMCU: PMCU-1 Operating/PMCU-2 OFF


PL: PL-1 primary/PL-2 off


TCS:


EETCS Loops A&B running on A pumps


PTCS: 6 Node 1 shell htrs on; 1 PMA1 shell htrs on; 2 PMA 2 Shell Htrs


ITCS Dual loop mode



EPS:


Russian Segment:


FGB Batteries-in incomplete charge mode


FGB Battery 4 offline


SM Batteries-in incomplete charge mode


SM ARCU 22 ON


USOS:


Both channels fully operational


BGAs in Auto Track Mode


PCU 1 in Discharge, PCU 2 Discharge


ECLS:


Russian Segment:


Elektron – On


Vozdukh — Failed


BMP — ON


CKB1 — On; CKB2 — OFF


SM SD#6 Failed


FGB SD 1, 3,4,& 5 — Off


Rapid Depress Response inhibited


Low Pressure warning Enabled


Response to Smoke/Fire Inhibited


Node1:


Cabin Fan — On


Aft Port IMV Fan On


Aft Port, Deck Aft, Fwd Port & Fwd Stbd IMV valves Open


SD-1 enabled, SD-2 OFF


PPRV’s not Capped


Cabin Pressure FDIR – Inhibited


USL:


PCA: LAB PCA in Mon, Rapid depress FDIR Enabled


IMV: AFT valves open; Aft Port Fan — ON


SD’s: LAB1PD1, LAB1SD5, & LAB1D6 Enabled


CCAA: LAB1P6 Full Up, LAB1S6 ON


CDRA: Override/Stop complete.


TCCS: Full Up State


MCA: Operational, Auto Sample


VES: VRS&VES 2.5" valves closed


Water Venting: Inhibited State


GNC:


Attitude Control Mode: CMG-TA with a momentum manager controller


Attitude: 0.2, 23., 0 (TEA)


Average Altitude: 388.3 km x 378 km


Beta: -11.1 with increasing magnitude



C&T:


FGB Komparus Deactivated


S-Band High Data Rate Mode


ECS Deactivated (will only be used for video con)


Audio System Nominal


Last 24 Hours Status


  • EVA crew reported that an ECOMM connector _ turn fastener came apart and part of the fastener may be in the STBD CBM vestibule area. The CBM petals were opened and the crew looked into the vestibule area and could not locate the missing parts. Additional attempts to recover the missing parts were discontinued by the EVA crew. MER is currently working additional troubleshooting plans.


  • C&C-1 MDM failed to Diagnostic state shortly after FCT performed a HDRL recovery command. Sequence of Events – MSD indicated failed, followed by HDRL fail. During recovery, C&C-1 Failed (currently in Diagnostics). C&C-2 MDM went to Primary, however this was not confirmed until about 30 minutes later due to inability to configure to OIU and the fact that C&C-2 came up looking for the TDRS-W satellite that would not come into view for 19 minutes. FCT performed reconfig procedures on C&C-2. MER C&DH ran test of command sequence in ISIL and could not duplicate failure resulting from command sequence. MER has requested dumps from C&C-1. MER C&DH will analyze data when available. No action to recover C&C-1 until after data is received. Data dump will continue when C&C 3 is on line. (See next problem)

  • During the C&C 2 set up process, the C&C 2 had a HRDL inaccessible error and a MSD inaccessible error message. Flight Controllers attempted to reset the HRDL and after several attempts with no joy, MER gave the go to transition to C&C 3. Words from MDM experts, problems with C&C 2 MSD were seen during testing at KSC. Believe C&C 2 problems may be limited to that MDM. Operating off of C&C 2 with no MSD results in loss of ZOE recorder which impacts SSRMS operations. Due to the time it takes to transition (2 hrs ) the activities for today have been moved around in the timeline. Powered payload transfers have been moved ahead of SSRMS/SRMS handover. C&C 2 could be used but would have degraded performance.

  • During the C&C 3 transition, received MSD inaccessability and No Op. MER C&DH is still looking at cause of C&C 3 problems. Looking hard at the PL MDM as a possible cause.


  • The KuBand ART has provided a new lower operating limit for the gimbal. The new limit is —7ºC with the new hard limit on the hardware of —9.4ºC. The FCT has been requested to park the KuBand Antenna when it reaches —7ºC.


  • The SLP was successfully removed from the LCA by the SSRMS yesterday. The SSRMS was placed in an overnight park position waiting to handover the SLP to the Shuttle RMS today. (Or FD8 if C&C MDM MSD recovery is not successful)


  • During Flight EVA #2, the Video Signal Converter (VSC) could not be removed from Space Lab Pallet (SLP) after unbolting and applying forces via EVA. EVA turned bolt 26 full turns; expected 10 required for release. EVA reported bolt appeared to snap back in. VSC had been shaded for some time prior to attempted removal. The VSC will be returned on the SLP.




Upcoming Events for GMT 2001/116 Flight Day 8 (All times CDT)


  • FD 8 will be replanned due to no EVA

  • SSRMS Airlock Dry Run 4:30am

  • Orbiter Waste Dump 2:00 pm

  • ISS Auto Reboost 4:30 pm

SpaceRef staff editor.