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PD0RDD > NASA 02.10.98 14:58l 119 Lines 6399 Bytes #-10054 (0) @ WW
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From: PD0RDD@PI8WNO.#UTR.NLD.EU
To : NASA@WW
Onderwerp: MARS POLAR LANDER ARRIVES AT KENNEDY SPACE CENTER
NASA News
National Aeronautics and
Space Administration
John F. Kennedy Space Center
Kennedy Space Center, Florida 32899
For Release Oct. 1, 1998
KSC Release No. 113-98
MARS POLAR LANDER ARRIVES AT KENNEDY SPACE CENTER
NASA's Mars Polar Lander arrived at Kennedy Space Center today to
begin final preparations for launch. The spacecraft arrived aboard an Air
Force C-17 cargo plane which landed at KSC's Shuttle Landing Facility early
this morning following its flight from the Lockheed Martin Astronautics
plant in Denver, CO. The launch of the Mars Polar Lander is targeted to
occur aboard a Boeing Delta II rocket on Jan. 3, 1999. This will be the
second spacecraft to be launched in the pair of Mars '98 missions. The Mars
Climate Orbiter is planned for launch on Dec. 10, 1998.
The solar-powered spacecraft is designed to touch down on the
Martian surface near the northern-most boundary of the south pole. This is
near the edge of Mars' thin, carbon dioxide ice sheet which will have
receded by the time the lander arrives in December 1999, late spring in the
southern hemisphere of Mars. The mission's objective is to study the water
cycle at the Martian south pole. The lander also will help scientists learn
more about climate change and current resources on Mars, studying such
things frosts, dust, water vapor and condensates in the Martian atmosphere.
The Mars Polar Lander is to be readied for launch in NASA's
Spacecraft Assembly and Encapsulation Facility-2 (SAEF-2) located in the KSC
Industrial Area. Among the activities to be performed will be a functional
test of the science instruments and the basic spacecraft subsystems.
Checkout of the communications system will be performed, including a
verification of the spacecraft's ability to send data to controllers on
Earth via the Mars Climate Orbiter and the tracking stations of the Deep
Space Network. The spacecraft's radar, used during the final descent, will
be installed and the solar arrays will be attached and tested.
The Deep Space 2 microprobes will also be installed on the lander's cruise
ring. These two probes, developed by NASA's New Millennium Program will test
technology and instruments to search for water several feet below the
Martian surface. The spacecraft will then be ready for mating with the
cruise stage and parachutes used for the trip through the lower Martian
atmosphere will then be installed.
Next, the spacecraft will be fueled with its attitude control fuel
and undergo spin balance testing. Finally, on Dec. 15, the spacecraft will
be mated to a Star 48 solid propellant upper stage booster and then prepared
for transportation to the launch pad.
Meanwhile, at Launch Complex 17, the Delta II rocket will be undergoing
erection and prelaunch checkout on Pad B. The first stage is scheduled to
be installed into the launcher on Nov. 23. Four solid rocket boosters will
be attached around the base of the first stage beginning on Nov. 25. The
second stage will be mated atop the first stage on Dec. 2, and the fairing
will be hoisted into the clean room of the pad's mobile service tower Dec.
3.
The Mars Polar Lander with its upper stage booster will be transported to
Complex 17 on Dec. 21 for hoisting atop the Delta and mating to the second
stage. After the spacecraft undergoes a state of health check, the
spacecraft will be closed out for flight and on Dec. 29 the two halves of
the Delta nose fairing placed around it. At liftoff, the spacecraft weighs
1,270 pounds (576 kilograms), is 3.6 feet (106 centimeters) tall, and 12
feet (360 centimeters) long.
Launch is planned to occur at the opening of an instantaneous launch window
on Jan. 3, 1999 at 3:31 p.m. EST. The nominal launch period is divided into
an eight-day primary period (Jan. 3-10) followed by a six-day secondary
launch period (Jan. 11-16). The planetary window closes on Jan. 27, 1999.
After an 11-month cruise phase, the Mars Polar Lander will arrive at the
planet and begin its descent to the surface. An imager onboard the
spacecraft will take high resolution photographs during the descent to the
surface to establish the geological and physical context of the landing
site. A robotic arm will be powered up soon after landing to begin exploring
this unknown region with an elaborate, 6.6-foot-long (2-meter) robotic
scoop, which will dig shallow trenches to further investigate Mars' climatic
history.
The lander also will conduct soil analysis experiments on the surface, using
a small "chemistry set" and "oven" to determine the thermal properties and
evolved gasses in frozen water and dust. Martian surface temperatures,
winds, pressure and the amount of dust in the atmosphere will be measured on
a daily basis, while a small microphone records the sounds of wind gusts or
mechanical operations onboard the spacecraft.
The 1998 Mars Climate Orbiter and Mars Polar Lander missions are managed by
the Jet Propulsion Laboratory for NASA's Office of Space Science,
Washington, D.C. JPL is a division of the California Institute of
Technology, Pasadena, CA. Lockheed Martin Astronautics, Denver CO, which
built and operates the spacecraft, is JPL's space industry partner in the
mission. Launch is the responsibility of NASA's John F. Kennedy Space
Center. The Boeing Company is KSC's space industry partner in launch
operations.
--end --
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