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: Ordnance installation is complete and pressurization of the hypergolic system is scheduled to be complete by late morning. Aft engine compartment close-outs and launch countdown preparations will continue this afternoon. The countdown will begin at the T-43 hour mark at 2 p.m. Monday, March 31.

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

* Complete aft engine compartment close-outs (March 29)

* Begin launch countdown (2 p.m. March 31)

* Crew arrival (2:30 p.m. March 31)

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) has been removed from Atlantis and sent to the Hypergolic Maintenance Facility where work will be conducted to verify the proper installation of thruster seals. The FRCS is scheduled to be returned to the OPF this weekend and reinstalled on the orbiter.

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

* Reinstall FRCS (March 31)

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

* Roll over to the VAB (April 9)

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 Space Shuttle main engines have been removed. The forward reaction control system functional checks continue today. The FRCS will be removed later this week and sent to the HMF for additional inspections of the thrusters. Work to remove and replace fuel cell No. 2 is scheduled to begin Thursday.

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

* Remove and replace fuel cell No. 2 (March 27)

* Install main engines (April 18)

NOTE ON ENDEAVOUR: The orbiter Endeavour atop the 747 Shuttle Carrier Aircraft (SCA) departed Palmdale, CA, at about 9 a.m. EST en route to the Naval Air Station at Ft. Worth, TX. Departure from Palmdale yesterday was delayed due to adverse weather conditions along the flight path in New Mexico. After refueling at Ft. Worth and weather permitting, Endeavour will likely continue east with a possible stopover at Warner Robbins Air Force Base, GA. If weather conditions are acceptable and there is enough time before sunset, Endeavour could possibly continue on into KSC this evening. Flight rules prohibit flying in adverse weather conditions and after sunset. A real time assessment will be made during the refueling stop at Ft. Worth. If Endeavour does not make it to KSC today, it will likely be arriving mid-morning tomorrow.

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