STS-103 Day 2 Highlights

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On Monday, December 20, 1999, 10:30 a.m. CST, STS-103 MCC Status Report # 02 reports:

Trailing the Hubble Space Telescope by about 3,700 nautical miles and closing, the seven Discovery astronauts were awakened at 9:50 a.m. CST today to the sounds of Bachman-Turner Overdrive's "Taking Care of Business." The wake-up call from Mission Control began the crew's first full day in orbit. Discovery is closing on the telescope at a rate of about 340 nautical miles with each hour and a half long orbit of Earth.

Today will be a day of preparation for the crew, gearing up for the rendezvous and capture of HST planned for Tuesday and the three maintenance spacewalks that will follow later in the week. At about 1 p.m., European Space Agency astronaut Jean-Francois Clervoy will power up Discovery's robotic arm to check its operation. Clervoy will survey Discovery's cargo bay using television cameras on the arm, checking the condition of the equipment planned for installation on the telescope and the cradle that will hold HST during the spacewalks. While Clervoy operates the arm, Payload Commander Steve Smith and Mission Specialist John Grunsfeld will power up the payload bay HST support equipment. Later, around 6 p.m., Commander Curt Brown and Pilot Scott Kelly will check out the laptop computers, navigation aids and flight controls in Discovery's cockpit that will be used for tomorrow's encounter with HST.

Meanwhile, on Discovery's middeck, Grunsfeld, along with European astronaut Claude Nicollier, will begin a check of the four spacesuits onboard. Early in the afternoon, about 1 p.m., the crew will lower the cabin pressure aboard Discovery as part of the spacewalk preparations. This reduces the amount of time the spacewalkers must breathe oxygen as part of a standard protocol to purge nitrogen from the body prior to beginning a spacewalk.

At 8:35 p.m. CST, Brown, Smith, Clervoy and Mike Foale will take a break from their work to talk with CBS news and other television networks about their mission.

As some of their final activities today, the crew will fire Discovery's large orbital maneuvering system engines at 10:32 p.m. to slow the rate at which the Shuttle is closing on HST. A second, smaller engine firing will follow at 11:27 p.m. to further fine tune the Shuttle's approach toward Hubble. Capture of the telescope remains scheduled for 6:41 p.m. Tuesday.

Discovery is in excellent condition, orbiting Earth every 95 minutes, 27 seconds. The high point of Discovery's orbit is 363 statute miles and the low point is 298 statute miles.

The next STS-103 mission status report will be issued at 11 p.m. Monday or as events warrant.

On Monday, December 20, 1999, 11:30 p.m. CST, STS-103 MCC Status Report # 03 reports:

The seven members of the STS-103 crew of Discovery completed a day of preparation Monday for a Tuesday capture of the Hubble Space Telescope. During three days of space walks, Hubble's capability to conduct astronomical observations will be restored and some of its equipment upgraded.

Discovery's robotic arm and the four space suits the astronauts will use on Wednesday, Thursday and Friday space walks, checked out with no major problems.

As the crew prepared for its sleep period, Discovery was 1,100 statute miles behind Hubble, closing at a rate of 150 statute miles per orbit. Discovery's orbit had been adjusted by firing the two Orbital Maneuvering System engines, mounted in pods on either side of the spacecraft's vertical tail fin. That burn added 79 feet per second to the orbiter's speed. A subsequent firing of Discovery's smaller Reaction Control System jets further refined the orbit by changing Discovery's speed by about eight feet per second.

The pressure in Discovery's cabin was lowered to 10.2 psi at about 1 p.m. Monday. This is part of the procedure to reduce the amount of nitrogen in the blood of space-walking astronauts. Later they will breathe pure oxygen. Those steps are designed to eliminate the possibility of nitrogen bubbles forming in their blood during spacewalks and causing an attack of the "bends," a condition that can affect deep-sea divers brought to the surface too quickly.

A little after 8:30 p.m. CST, four members of the crew, Commander Curt Brown, Pilot Scott Kelly, and Mission Specialists Jean-Francois Clervoy and Mike Foale, participated in an on-orbit interview with three organizations: CBS News, the Hal Uplinger Millennium TV Network and ABS-PBS Millennium Broadcast.

On Tuesday Discovery will approach the space telescope with a series of burns to match its orbit. The rendezvous' terminal initiation burn is to occur at about 4:30 p.m. when Discovery is about eight miles behind Hubble. Brown and Kelly will maneuver the orbiter to a point directly beneath Hubble, then move upward toward it. Clervoy, using the orbiter's robotic arm, will grapple Hubble about 6:40 p.m. and place it on the Flight Service System in the rear of Discovery's cargo bay. There, it can be rotated and tilted to enable space-walking astronauts to better access its equipment bays.

Discovery is in an orbit with a high point of 367 statute miles and a low point of 352 miles. All systems are in excellent condition.

The next STS-103 mission status report will be issued at 11 a.m. Tuesday.

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