MISSION: STS-83 -- Microgravity Science Laboratory-1 (image)

• VEHICLE: Columbia/OV-102 (image)
• LOCATION: Pad 39A
• LAUNCH DATE/TIME: April 3 at 2:01 p.m. EST
• LAUNCH WINDOW: 2 hours, 30 minutes
• TARGET KSC LANDING DATE/TIME: April 19 at about 7:37 a.m. EDT
• MISSION DURATION: 15 days, 16 hours, 36 minutes
• CREW: Halsell, Still, Voss, Thomas, Gernhardt, Linteris, Crouch (image)
• ORBITAL ALTITUDE and INCLINATION: 160 nautical miles/28.45 degrees

NOTE: Launch countdown preparations and aft engine compartment close-outs are complete. The aft confidence test is in work today and will be complete by the time the countdown begins at 2 p.m. today. The crew is scheduled to arrive at KSC's Shuttle Landing Facility at 1:30 p.m. EST. No serious technical issues are being worked on the vehicle at this time.

STS-83 SCHEDULED OPERATIONAL MILESTONES (dates are target only):

* Begin operations to load cryogenic reactants into Columbia's fuel cell storage tanks (10 a.m. April 1)

* Rotate service structure into launch position (8 p.m. April 2)

* Begin external tanking operations (5:11 a.m. April 3)

* Crew departs for Pad 39A (10:41 a.m. April 3)

MISSION: STS-84 -- 6th MIR DOCKING & SPACEHAB DM (image)

• VEHICLE: Atlantis/OV-104
• LOCATION: Orbiter Processing Facility bay 3
• TARGET KSC LAUNCH DATE/TIME: May 15 at about 4:07 a.m.
• LAUNCH WINDOW: 7-10 minutes
• TARGET KSC LANDING DATE/TIME: May 24 at about 7:52 a.m.
• MISSION DURATION: 9 days, 3 hours, 45 minutes
• CREW: Precourt, Collins, Foale, Noriega, Lu, Clervoy, Kondakova
• ORBITAL ALTITUDE and INCLINATION: 160 nautical miles/51.6 degrees

NOTE: The forward reaction control system (FRCS) remains at the Hypergol Maintenance Facility where work is being conducted to verify the proper installation of thruster seals. The FRCS will be returned to the OPF later this week and reinstalled on the orbiter. Due to the additional work on the FRCS, payload bay door closure and roll over to the VAB has been delayed 2-3 days. No serious impact to the overall pad schedule is expected.

STS-84 SCHEDULED OPERATIONAL MILESTONES (dates are target only):

* Return forward reaction control system to OPF (April 1)

* Reinstall forward reaction control system on orbiter (April 3)

* Close payload bay doors for roll to VAB (April 1)

* Roll over to the VAB (April 11)

MISSION: STS-85 -- CRISTA-SPAS-2

• VEHICLE: Discovery/OV-103
• LOCATION: Orbiter Processing Facility bay 2
• TARGET LAUNCH DATE/TIME: July 17 at 10:06 a.m.
• LAUNCH WINDOW: 1 hour, 54 minutes
• TARGET KSC LANDING DATE/TIME: July 28 at about 6:54 a.m.
• MISSION DURATION: 10 days, 20 hours, 48 minutes
• CREW: Brown, Rominger, Davis, Curbeam, Robinson, Tryggvason
• ORBITAL ALTITUDE and INCLINATION: 160 nautical miles/57 degrees

NOTE: The forward reaction control system has been removed and will be sent to the Hypergol Maintenance Facility tomorrow to remove and replace a helium isolation valve. Also, inspections of the thrusters' seals will be X-rayed for proper installation.

STS-85 SCHEDULED OPERATIONAL MILESTONES (dates are target only):

* Reinstall FRCS (about April 10)

* Install main engines (April 18)

NOTE ON ENDEAVOUR: The orbiter Endeavour is in OPF Bay 1 and post-arrival inspections are in work. The payload bay doors are scheduled to be opened on Wednesday. Also, the protective main engine tail cone will be removed on Wednesday. The minor spill of hydraulic fluid from Friday has been cleaned up with no adverse affects to the flight hardware or flight systems.

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