MISSION: STS-99 -- SHUTTLE RADAR TOPOGRAPHY MISSION (SRTM)

• VEHICLE: Endeavour/OV-105
• LOCATION: OPF bay 2
• TARGET KSC LAUNCH DATE/TIME: October 1999 (under review)
• TARGET KSC LANDING DATE/TIME: October 1999 (under review)
• LAUNCH WINDOW: 2 hours and 30 minutes
• MISSION DURATION: 11 days, 4 hours and 5 minutes
• CREW: Kregel, Gorie, Kavandi, Voss, Mohri, Thiele
• ORBITAL ALTITUDE and INCLINATION: 126 nautical miles/57 degrees

NOTE: Following the removal of the Shuttle Radar Topography Mission payload from Endeavour's payload bay last week, technicians are continuing with inspections and repairs as necessary of the wiring in the orbiter's midbody and aft engine compartment. These inspections were required for all Shuttle orbiters following mission STS-93 when a damaged wire to a main engine controller shorted out. Preventative measures are under way to preclude similar wiring damage on all vehicles. At this time, over 70 percent of the work on Endeavour is complete. The SRTM payload is currently in the Vertical Processing Facility and will remain there until all wiring work on Endeavour is complete.

Launch options are being reviewed this week for Endeavour as well as Discovery. No specific target launch dates are expected to be announced until later next week.

MISSION: STS-103 -- 3rd HUBBLE SPACE TELESCOPE SERVICING MISSION (HST-3)

• VEHICLE: Discovery/OV-103
• LOCATION: OPF bay 1
• TARGET KSC LAUNCH DATE/TIME: October 1999 (under review)
• TARGET KSC LANDING DATE/TIME: October 1999 (under review)
• LAUNCH WINDOW: 42 minutes
• MISSION DURATION: 9 days, 21 hours and 38 minutes
• CREW: Brown, Kelly, Smith, Foale, Grunsfeld, Nicollier, Clervoy
• ORBITAL ALTITUDE and INCLINATION: 317 nautical miles/28.45 degrees

NOTE: Wiring inspections are about 50 percent complete aboard the orbiter Discovery.

Launch options are being reviewed this week for Endeavour as well as Discovery. No specific target launch dates are expected to be announced until later next week.

MISSION: STS-101 -- 3rd INTERNATIONAL SPACE STATION FLIGHT - SPACEHAB DOUBLE MODULE/ICC

• VEHICLE: Atlantis/OV-104
• LOCATION: VAB transfer aisle
• TARGET KSC LAUNCH DATE/TIME: January 22, 2000
• TARGET KSC LANDING DATE/TIME: February 3, 2000
• LAUNCH WINDOW: 5-10 minutes
• MISSION DURATION: 10 days and 19 hours
• CREW: Halsell, Horowitz, Weber, Lu, Williams, Malenchenko, Morukov
• ORBITAL ALTITUDE and INCLINATION: 173 nautical miles/51.6 degrees

NOTE: Orbiter Atlantis is currently being stored inside the Vehicle Assembly Building, awaiting the opening of an Orbiter Processing Facility bay. Wiring inspections in Atlantis' payload bay are complete. Atlantis was moved yesterday to the VAB transfer aisle from high bay 2 to accommodate external tank transfer activities.

Shuttle managers today approved the delay of mission STS-101 to Jan. 22, 2000.

NOTE: Orbiter Columbia continues to undergo routine post-flight-deservicing in Orbiter Processing Facility bay 3. Wiring inspections are complete and the wire that experienced the short on mission STS-93 has been repaired. Preventative measures have been taken to preclude similar damage. Workers are preparing the orbiter for its upcoming Orbiter Maintenance Down Period (OMDP) in Palmdale, CA. Columbia is scheduled to be mounted atop NASA's modified Boeing 747 on Sept. 22. The ferry flight from KSC is scheduled to begin on Sept. 23 with an overnight stop at Luke Air Force Base in Arizona. Current plans have Columbia arriving in Palmdale on Sept. 24. Because the orbiter can not be flown through precipitation of any kind, ferry flight plans are contingent upon weather conditions in the flight path.

Information about the countdown and mission can be accessed electronically via the Internet at: http://www.ksc.nasa.gov/shuttle/countdown/ and at http://shuttle.nasa.gov/