http://apollo-society.org/spaceupdate.html
SPACE UPDATE

31 October 1998

Volume 2, Number 9

by
Gregory A. Smith

Contributors to this issue
James Warnock

Published by

THE APOLLO SOCIETY
P.O. Box 61206
Honolulu, HI 96839-1206

WEB SITE: http://apollo-society.org
EMAIL: capcom@apollo-society.org

SPONSORSHIP

See also:
The Apollo Launch Pad
Space News Links


All images are courtesy of NASA unless otherwise noted.
Contents


TOP STORY

John Glenn Flies Again!

After a thirty-six year hiatus, Astronaut/Senator John Glenn is once again in orbit as a member of the crew of the space shuttle mission, STS-95, which successfully launched from the NASA Kennedy Space Center at 2:20 p.m. EST Thursday, October 29, 1998, beginning a nine-day mission.

See more regarding John Glenn and the flight of STS-95 in the Space Shuttle section below.

19981031-GS

Living in Space
MIR 26

MIR CORE LAUNCHED
February 19, 1986

Current Mir Location:
Earth Orbit, ~390km altitude

Current Crew:
Gennady Padalka , Commander
(ARV AUG98/DPT FEB99)
Sergei Avdeyev , Flight Engineer
(ARV AUG98/DPT FEB99)

Upcoming Mir Events
February 22, 1999 - Soyuz TM-29 (Mir-27)
March 2, 1999 - Soyuz TM-28 (Mir-26) Return
March 10, 1999 - Progress TM-41
April 2, 1999 - Progress TM-50
June 1, 1999 - Soyuz TM-29 (Mir-27) Return

June 8, 1999 - Mir Deorbit


Mir Reference Pages

MAXIMOV ONLINE: MIR Current News
www.maximov.com/Mir/mircurrent.html

HoustonChronical.com: Space Central
Russian Space Station Mir

www.chron.com/content/interactive/space/missions/mir

CNN SCI-TECH NEWS (MISSION MIR)
cnn.com/TECH/9707/mir

CNN SCI-TECH NEWS (SOYUZ)
cnn.com/TECH/9707/mir/soyuz

The Soyuz-TM ferry & lifeboat www.hq.nasa.gov/osf/mir/soyuz.html

Progress Resupply Vehicle schematic
www.maximov.com/Mir/mirprogr.gif

The CBS NEWS Space Shuttle/Soyuz/ELV Launch Schedule
uttm.com/space/missions/future.html

CBS NEWS Space Statistics uttm.com/space/statistics.html

NASA SHUTTLE-MIR
shuttle-mir.nasa.gov

NASA Office of Space Flight - MIR www.hq.nasa.gov/osf/mir

Liftoff - MIR Station
liftoff.msfc.nasa.gov/rsa/mir.html

MIR 25 CURRENT STATUS

On Tuesday, October 27, an uncrewed Russian cargo ship successfully docked with Mir space station bringing food, water and scientific equipment, including French-made instruments for recording meteorite showers and a solar mirror for experiments that will reflect sunlight down to Earth.

The Mir 26 crew which arrived in August, are Commander Gennady Padalka and Flight Engineer Sergei Avdeyev.

The final Mir crew, Viktor Afanasyev and Sergei Treshchev, will replace Padalka and Avdeyev in February, 1999. The final Mir crew is expected to stay aboard Mir for a 5 month stay before deorbiting the Mir Space Station in July/August 1999.

In a ceremony held in Los Angeles on October 10, Space Frontier Foundation President Rick N. Tumlinson presented Deputy Mission Control Director Victor Blagov with a special award for the heroic efforts of the Energia mission control center in Moscow in keeping the Mir Space Station operational during the very difficult period since its launch in February, 1986.

Plans to deorbit the Russian Mir Space Station in July/August 1999 are underway. Unless something is done to boost Mir to a higher orbit, a blazing end to this legacy of human space flight will come anyway as the Mir will burn in the fire of re-entry into Earth's atmosphere within 2 years. Check out the Keep Mir Alive page sponsored by the Space Frontier Foundation.

19981031-GS

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SPACE SHUTTLE
Upcoming Space Shuttle Flights

MISSION -- ORBITER -- LAUNCH DATE
STS-95 -- Discovery -- 29 October 1998


Space Shuttle Info Bytes

STS SPECS:
Crew Capacity: 8 (10 could be carried in an emergency)
Max Acceleration Load < 3Gs.
Orbital Altitude: 100 to 217 nautical miles.
Cargo bay dimensions: 15 feet diameter, 60 feet long.
Basic Mission Length: 7 days in space

ORBITERS:
Enterprise (OV-101): used for Approach and Landing Tests, the Enterprise now is property of the Smithsonian Institution and is at Dulles Airport, Virginia.
Columbia (OV-102): the first operational orbiter, STS-1 first launched on 12 April 1981. Columbia has completed 25 flights to date.
Challenger (OV-099): the second orbiter, flew 10 missions between 1983 and 1986 for a combined total of 69 days in space. On January 28, 1986, Challenger and her crew were lost in a launch accident.
Discovery (OV-103): the third orbiter, Discovery has flown 25 missions since its maiden voyage on August 30, 1984.
Atlantis: (OV-104): Atlantis has flown 19 missions since its first launch on October 3, 1985. Atlantis is currently being upgraded and is scheduled to return to KSC on August 24, 1998.
Endeavour: (OV-105): Replacing the Challenger and completing the 4-orbiter space shuttle fleet, Endeavor has flown 12 missions since its first launch on May 5, 1992.


Space Shuttle Reference Pages

NASA Space Shuttle Current Status
www-pao.ksc.nasa.gov/kscpao/status/stsstat/current.htm

The NASA Shuttle Web
shuttle.nasa.gov

Future Shuttle Missions
www.osf.hq.nasa.gov/shuttle/futsts.html

STS News Reference Manual
www.ksc.nasa.gov/shuttle /technology/sts-newsref/stsref-toc.html

SPACE SHUTTLE CURRENT STATUS

John Glenn Flies Again!

After a thirty-six year hiatus, Astronaut/Senator John Glenn is once again in orbit as a member of the crew of the space shuttle mission, STS-95, which successfully launched from the NASA Kennedy Space Center at 2:20 p.m. EST Thursday, October 29, 1998, beginning a nine-day mission.

John H. Glenn, Jr., made history thirty-six years ago when he became the first American to orbit the Earth. Astronaut Glenn's first flight was aboard the "Project Mercury" spacecraft he named "Friendship 7" which launched to Earth orbit on February 20, 1962. The Mission Objective for John's first flight was to: "Place a man into earth orbit, observe his reactions to the space environment and safely return him to earth to a point where he could be readily found."

Now 77 years young, John Glenn is the oldest human to fly into space. As a payload specialist, Astronaut/Senator Glenn is helping to advance knowledge of human physiological responses to the space environment, just as he did on his first flight 36 years ago. The information gained from the study of Glenn's response to space flight may also help scientists understand the aging process. There are some similarities between spaceflight and aging which include bone and muscle loss, balance disorders, and sleep disturbances.

Check out this Shuttle/Mercury comparision page by NASA: http://shuttle.nasa.gov/index.html/mershut.html

A variety of other science experiments will also be conducted during the mission. The STS-95 crew will be commanded by Curt Brown, who will be making his fifth Shuttle flight. The pilot, Steve Lindsey, will be making his second flight. There are three mission specialists assigned to this flight -- Scott Parazynski, making his third flight, Steve Robinson, making his second flight, and Pedro Duque from the European Space Agency (ESA) who is making his first flight. Chiaki Mukai, a payload specialist from the Japanese Space Agency (NASDA), will be making her second flight.

CURRENT SHUTTLE MISSION: STS-95
KSC LAUNCH DATE/TIME: Oct. 29 at 2:20 p.m. EDT
MISSION DURATION: 8 days, 22 hours
TARGET KSC LANDING DATE/TIME: Nov. 7 at 12:04 p.m. EDT
PAYLOAD: SPACEHAB-SM, SPARTAN & HOST The primary objective of this flight is to conduct a variety of science experiments being carried in the pressurized Spacehab module.
VEHICLE: Discovery (OV-103)

Curtis L. Brown (5), Commander
Steven W. Lindsey (2), Pilot
Scott E. azynski (3), Mission Specialist
Stephen K. Robinson (2), Mission Specialist
Pedro Duque (1), (ESA) Mission Specialist
Chiaki Mukai (2), (NASDA) Payload Specialist
John H. Glenn (2), Payload Specialist

19981031-GS

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INTERNATIONAL
SPACE STATION


Space Station Information

Total Crew Size = 6
Altitude: 190 to 230 nautical miles
Orbit Inclination: ~ 51.6 degrees
Total pressurized volume: ~ 46,200 cubic feet

ISS Partners:

Belgium, Brazil, Canada, Denmark, France, Germany, Italy, Japan, Netherlands, Norway, Spain, Sweden, Switzerland, Russia, United Kingdom, United States


International Space Station Reference Pages

International Space Station NEXUS
Marshall Space Flight Ceneter
station.msfc.nasa.gov

International Space Station NEXUS News
station.msfc.nasa.gov/Now/News

NASA International Space Station
station.nasa.gov

ISS Assembly Flights Chronology
station.nasa.gov/station/assembly/flights/chron.html

ISS Assembly Sequence Line Art Images
station.nasa.gov/gallery/lineart/index.html

The International Space Station Research Plan
www.hq.nasa.gov/office/olmsa/ISS

INTERNATIONAL SPACE STATION

On October 26, 1998, the first U.S.-built station component, the "Unity" connecting module, was moved to the launch pad to be loaded onto the Space Shuttle Endeavour.

Endeavour is targeted to be launched on December 3, 1998 with a six-person international crew that will carry Unity to a rendezvous and attachment with the Zarya control module. Zarya is targeted to launch on a Russian Proton rocket November 20, 1998 from the Baikonur Cosmodrome, Kazakstan.

ISS ASSEMBLE SCHEDULE (Revision D) (Through 1998)

Launch Date - Flight - Vehicle - Element(s)

Nov 20, 1998 - 1A/R - Russian - Zarya (Functional Cargo Block - FGB)

Dec 3, 1998 - 2A - US STS-88 - Unity Node

See also:

ISS Assembly Flights Chronology
station.nasa.gov/station/assembly/flights/chron.html

ISS Assembly Sequence Line Art Images
station.nasa.gov/gallery/lineart/index.html

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Robotic Space Exploration
Planetary Probe Updates
SPACECRAFT
STATUS


Galileo
Jupiter orbiter and atmospheric probe

Launch: 18 October 1989

Jupiter Arrival: 7 December 1995

Galileo Jupiter Orbit Tour graphic
Jun 96 - Nov 97

Galileo Europa Mission (GEM)
December 7, 1997-December 31, 1999

8 Europa encounters
December 16, 1997 - Feb 1, 1999

Next Galileo Spacecraft Satellite Encounter:
"Europa 18" - 22 November 1998

The Galileo Europa Mission
encounters schedule:

    E12 Europa - 16 December 1997
    E13 Europa - 10 February 1998
    E14 Europa - 29 March 1998
    E15 Europa - 31 May 1998
    E16 Europa - 21 July 1998
    E17 Europa - 26 September 1998
    E18 Europa - 22 November 1998
    E19 Europa - 1 February 1999

Perijove reduction/water/Io Torus study
May 5, 1999 - Sept 16, 1999

Io approaches
Oct 11, 1999 and Nov 26, 1999

End of mission: Dec 31, 1999


Galileo Reference Pages

Galileo Home Page
www.jpl.nasa.gov/galileo

Galileo News and Events
www.jpl.nasa.gov/galileo/news.html

Galileo Europa Mission (GEM)
www.jpl.nasa.gov/galileo/gem

Galileo Europa Mission (GEM) Fact Sheet
www.jpl.nasa.gov/galileo/gem/fact.html

Where's Galileo Right Now?
www.jpl.nasa.gov/galileo/countdown/mclock.html

Galileo - Countdown
www.jpl.nasa.gov/galileo/countdown

GALILEO EUROPA MISSION STATUS

On Friday, Sept. 25, at 8:54 p.m. PDT, the Galileo spacecraft flew over Europa at an altitude of 3,582 kilometers (2,226 miles) during its "Europa 17" orbit of Jupiter.

Scientist now believe that Jupiter's Moon Callisto may have a saline ocean under its icy surface.

Galileo data show that Callisto has a variable magnetic field. Scientist believe this may be caused by varying electrical currents flowing near Callisto's surface in response to changes in the background magnetic field as Jupiter rotates. Scientists have determined that the most likely place for the currents to flow would be a layer of melted ice with a high salt content.

The full data sets from Galileo's first nine orbits are now available at: www.jpl.nasa.gov/galileo/sepo/fulldata.html.

Check out Io's Aurora:

Original Caption Released with Image:

This eerie view of Jupiter's moon Io in eclipse (left) was acquired by NASA's Galileo spacecraft while the moon was in Jupiter's shadow. Gases above the satellite's surface produced a ghostly glow that could be seen at visible wavelengths (red, green, and violet). The vivid colors, caused by collisions between Io's atmospheric gases and energetic charged particles trapped in Jupiter's magnetic field, had not previously been observed. The green and red emissions are probably produced by mechanisms similar to those in Earth's polar regions that produce the aurora, or northern and southern lights. Bright blue glows mark the sites of dense plumes of volcanic vapor, and may be places where Io is electrically connected to Jupiter.

19981031-GS

Mars Pathfinder
Mars lander and rover

Launch: 4 December 1996

Landing: 4 July 1997

Final successful data transmission:
27 September 1997
(Sol 83 of the mission)

MARS PATHFINDER

Final successful data transmission:
27 September 1997 - Sol 83 of the mission

NOTE: No further updates regarding the Mars Pathfinder mission will be posted here. For more information regarding this highly successful mission, please follow the reference links provided below.

Mars Pathfinder Reference Pages

Mars Pathfinder Home Page
mpfwww.jpl.nasa.gov/default.html

Mars Pathfinder (NSSDC)
nssdc.gsfc.nasa.gov/planetary/mesur.html

Mars Global Surveyor
Mars orbiter

Launch: 7 Nov 1996

Arrival: 12 Sep 1997


Mars Global Surveyor Reference Pages

Mars Global Surveyor Home Page
mpfwww.jpl.nasa.gov/mgs

Current Flight Status Report
mpfwww.jpl.nasa.gov/mgs/status/reports/current.html

MGS Current Orbit Display
marsnt3.jpl.nasa.gov/mgs/realtime/orbit.html

JPL Mars Missions News & Information
www.jpl.nasa.gov/marsnews

JPL Mars Missions Mirror Sites
marsweb.jpl.nasa.gov

Mars Global Surveyor (NSSDC)
nssdc.gsfc.nasa.gov/planetary/marsurv.html

MARS GLOBAL SURVEYOR STATUS

As of the 28 Oct, 1998 Mars Global Surveyor Project Status Report Overview; Spacecraft operations continue successful aerobraking activities. About 15 minutes have been removed from the orbit period over the last 6 passes.

In April of 1999, MGS should complete its aerobraking and begin mapping the planet in detail.

Dark lines running for miles across the Martian surface are appearing in certain high resolution images provided by the Mars Global Surveyor's Mars Orbiter Camera system.

These dark lines are believed to be caused by "Dust Devils" as they move across the surface picking up dust.

See the dark lanes on the Malin Space Science Systems' 30 July 98 release.

Also, Check out the images of the Martian moon, Phobos, which the Mars Global Surveyor acquired in August.

Though Phobos is the larger of the two moons orbiting Mars, it is only about 22 km in diameter. Temperature measurements of its surface made by the MGS's Thermal Emission Spectrometer suggest that the surface is composed of very fine dust.

This image of Phobos was acquired by the Mars Global Surveyor on August 19, 1998. The image covers an area of approximately 8.2 km (5.1 mi) wide by 12 km (7.5 mi) and has a resolution of about 12 meters (40 feet) per picture element, or "pixel".

19981029-JW & GS

Near-Earth Asteroid Rendezvous
(NEAR)

Launch: 17 February 1996

Asteroid 253 Mathilde Encounter:
June 27, 1997

Earth Swing-by: January 23, 1998

Asteroid 433 Eros Rendevous:
10 January 1999


Near-Earth Asteroid Rendezvous
Reference Pages

NEAR Home Page
sd-www.jhuapl.edu/NEAR

Weekly Status Reports
sd-www.jhuapl.edu/NEAR/Reports/WeeklyStatus/

Mission Timeline
sd-www.jhuapl.edu/NEAR/news_timeline.html

NEAR Event Countdowns
sd-www.jhuapl.edu/NEAR/countdowns.html

NEAR EARTH ASTEROID RENDEZVOUS STATUS

According to the "NEAR WEEKLY REPORT" of October 2, 1998, "The NEAR spacecraft state/configuration has remained nominal..."

NEAR's study of Eros will be the first in-depth examination of a near-Earth asteroid and is expected to yield information that will help scientists better understand the evolution of our solar system. NEAR is the first mission of NASA's "Discovery" series.

19981031-GS


Lunar Prospector
Lunar orbiter

Launch: 6 January 1998

Lunar Arrival: 9 January 1998


Lunar Prospector Reference Pages

Lunar Prospector Home Page
lunarprospector.arc.nasa.gov

Lunar Prospector Science Results
lunarprospector.arc.nasa.gov/science/results

Lunar Prospector (NSSDC)
nssdc.gsfc.nasa.gov/planetary/lunarprosp.html

Lunar Prospector Data Visualization
lunarprospector.arc.nasa.gov/dataviz/

LUNAR PROSPECTOR STATUS

"The Lunar Prospector spacecraft continues to perform very well."
Oct 9, 1998 Lunar Prospector Status Report

Give yourself an education and check out the way cool Lunar Prospector "Data Viz" data visualization page.


On March 5th, 1998 Lunar Prospector project scientist announced that the Lunar Prospector had returned data that indicates that there is a high probability of water ice existing at both the north and south poles of the Moon. The presence of a significant amount of water on the Moon could be important in the establishment of human communities beyond Earth.

See the CNN SCI-TECH article on Lunar Prospector's ice discovery at: CNN SCI-TECH Space - 05 March 1998 - Scientist: There is ice on the moon

For more information about ice on the Moon, check out the "Planetary Science Research Discoveries" article "Ice on the Bone Dry Moon" by Dr. Paul D. Spudis.

19981031-GS

Cassini/Huygens
Saturn orbiter / Titan lander

Launch: 15 October 1997

Venus swingbys:
21 April 1998, 20 June 1999
Earth swingby: 16 August 1999
Jupiter swingby: 30 December 2000
Saturn Arrival: 1 July 2004

Huygens Probe Titan Arrival:
November 27, 2004


Cassini/Huygens Reference Pages

Cassini Mission Home Page (JPL)
www.jpl.nasa.gov/cassini

Cassini Press Releases/Status Reports www.jpl.nasa.gov/cassini/MoreInfo/press.html

Cassini (NSSDC)
nssdc.gsfc.nasa.gov/planetary/cassini.html

Cassini - VVEJGA Trajectory www.jpl.nasa.gov/cassini/Mission/pix/trajectory_lg.gif

Huygens Probe (NSSDC)
nssdc.gsfc.nasa.gov/planetary/huygens.html

Huygens Probe (ESA)
sci.esa.int/huygens/

CASSINI/HUYGENS STATUS

As of the Sept. 4, 1998 Cassini Mission Status Report, "The Cassini spacecraft remains in excellent health on its voyage to Saturn. Spacecraft operations have been normal with most tasks focused on routine maintenance activities. "

The Cassini spacecraft will arriving on orbit around Saturn in 2004. Cassini will study the great ringed planet, its moons and ring system for at least four years. It will also deliver a scientific probe called Huygens which will parachute to the surface of Saturn's largest moon, Titan.

19981031-GS

Nozomi (Hope) (Planet-B)
Japanese Mars aeronomy orbiter

Launch: 3 July 1998

Mars Arrival: 11 October 1999


Nozomi (Planet-B) Reference Pages

Planet-B Home Page (ISAS/Japan)
www.planet-b.isas.ac.jp/index-e.html

Planet-B Orbit
www.planet-b.isas.ac.jp/index-e.html

Planet-B (NSSDC)
nssdc.gsfc.nasa.gov
/cgi-bin/database/www-nmc?98-041A

Nozomi Mars Imaging Camera
komadori.planet.kobe-u.ac.jp/~inada/MIC_e.html

Nozomi's Earth & Moon Image komadori.planet.kobe-u.ac.jp/~inada/MIC/0718_e.html

Nozomi Instrument List
nssdc.gsfc.nasa.gov
/cgi-bin/database/www-nmc?98-041A-__

NOZOMI (HOPE) (PLANET-B) STATUS

On July 18 Nozomi took its first picture; a beautiful image of the
Earth and Moon .

The Planet-B Mars probe was successfully launched on July 3, 1998. The launch took off from the Kagoshima space center in Japan and placed the Planet-B spacecraft in parking orbit around earth. Renamed Nozomi (Hope) after launch, Nozomi is the first Japanese space mission to Mars. It is also the first non-U.S. or Russian space flight to another body in the solar system.

A Mars orbiting aeronomy mission, Nozomi is designed to study the martian upper atmosphere and its interaction with the solar wind. Instruments on the spacecraft will measure the structure, composition and dynamics of the ionosphere, aeronomy effects of the solar wind, the escape of atmospheric constituents, the structure of the magnetosphere, and dust in the upper atmosphere and in orbit around Mars. The mission will also be returning images of Mars' surface and the martian moons Phobos and Deimos.

NASA announced on July 1,1998 that two U.S. instruments will fly aboard Planet-B. A neutral mass spectrometer (NMS) will allow chemical analysis of the upper atmosphere on a planet wide scale. An Ultra Stable Oscillator is part of a radio science experiment and will help guide the craft through its super accurate clock.

Following the launch July 3,1998 on Japan's new 4 stage rocket, the M-5, from Kagoshima in southern Japan, the $80 million probe will initially be put into an elliptical parking orbit around the moon. After 2 swingbys of the Earth to gain gravitaional energy the spacecraft will slingshot to Mars for a 10 month voyage.

In October 1999, Nozomi will be inserted into a highly eccentric Mars orbit 300 km x 47,500 km with an inclination of 138 degrees and a period of just over 38 hours.

The nominal mission is planned for one Martian year (approximately two Earth years). An extended mission may allow operation of the mission well beyond the original two years.

19981031-GS

Deep Space 1
Asteroid, Comet flyby

Launch Date:
October 24, 1998

Fly-by Target:

Near-Earth Asteroid
"1992 KD"

NEA 1992 KD Fly-by Date:
July 28, 1999

Demonstration Mission End:
By October 1999

At that time, Deep Space 1 may begin on a new trajectory to encounter Comets Wilson-Harrington and Borrelly.


Deep Space 1 Reference Pages

Deep Space 1 Home Page
nmp.jpl.nasa.gov/ds1

Deep Space 1 Status Reports
www.jpl.nasa.gov/ds1news

New Millenium Program
nmp.jpl.nasa.gov

DEEP SPACE 1 STATUS

Sucessful Launch!!
October 24, 1998

NASA's Deep Space 1 mission was successfully launched Saturday, October 24, at 8:08 a.m. Eastern Daylight Time (EDT) from Cape Canaveral Air Station, FL.


Deep Space 1 Mission Status as of October 28, 1998:

"The outward-bound Deep Space 1 spacecraft, now more than twice the Moon's distance from Earth, is in excellent condition in its fifth day of flight... Yesterday, spacecraft commands were successfully sent to begin preparation of various system components for the planned Nov. 9 start-up of the ion propulsion engine."


Deep Space 1 is targeted to fly-by Near-Earth Asteroid 1992 KD on July 28, 1999. The technology demonstration mission is scheduled to end by October 1999. At that time, Deep Space 1 may begin on a new trajectory to encounter Comets Wilson-Harrington and Borrelly.

Deep Space One is the first deep space mission of NASA's New Millennium Program. The New Millennium Program (NMP) is an agressive technology demonstration established to validate advanced technologies while returning science data.

19981031-JW & GS

Mars Climate Orbiter
Mars orbiter mission

Launch: December 10, 1998

Mars Arrival: September 1999


Mars Climate Orbiter Reference Pages

Mars Surveyor `98 Mission
mpfwww.jpl.nasa.gov/msp98/msp2.html

Mars Surveyor `98 Status Reports
mpfwww.jpl.nasa.gov/msp98/news/status.html

Mars Climate Orbiter Configuration
mpfwww.jpl.nasa.gov/msp98/orbiter.html

Mars Climate Orbiter (NSSDC)
nssdc.gsfc.nasa.gov/cgi-bin/database/www-nmc?MARS98S

JPL Mars Missions News & Information
www.jpl.nasa.gov/marsnews

MARS CLIMATE ORBITER

The Mars Climate Orbiter will be launched in December of 1998 on a Delta II rocket. It will be followed about 3 weeks later by the Mars Polar Lander, also launched by the same rocket system. The Jet Propulsion Laboratory will supervise both missions.

The Orbiter spacecraft will have a 10 month journey to the red planet. On about Sept. 23 1999, it will commence an aerobraking manuver to acheive Mars orbit insertion (MOI). This eliptical capture orbit will be incrementally reduced by successive passes through the thin upper atmosphere. After about 2 months the orbit will be circularized using onboard hydrazine thrusters into a circular polar mapping orbit (altitude ~ 400 km.)

The overall theme of the 2 part Mars Surveyor '98 mission is "volatiles and climate history". Once the Mars Climate Orbiter reaches its final orbit it will commence surface mapping, while another instrument package is analyzing the atmospheric composition and weather. The spacecraft will also act as a data link to relay information from its companion spacecraft (the Mars Polar Lander) back to Earth. The atmospheric sounding and imaging phase is scheduled to last for one Mars year (687 Earth days).

In its role as a data relay the Mars Climate Orbiter should be operational for at least 5 years. This will allow an encore data relay performance for the '01 Mars mission, arriving in January 2002.

19981031-JW

Mars Polar Lander

Launch: January 3, 1999

Mars Landing: December, 1999


Mars Polar Lander Reference Pages

Mars Surveyor `98 Mission
mpfwww.jpl.nasa.gov/msp98/msp2.html

Mars Polar Lander Home Page www.exploringmars.org/missions/mpl

Mars Polar Lander
mpfwww.jpl.nasa.gov/msp98/lander

Mars Polar Lander Configuration
mpfwww.jpl.nasa.gov/msp98/lander.html

MARS POLAR LANDER

While the Mars Climate Orbiter surveys the planet from on high, the Mars Polar Lander will conduct its mission from the Martian surface.

The Mars Polar Lander must decellerate from 7 km/sec to 2.4 meters/sec for a safe Martian touchdown. This will be accomplished by aerobraking with an ablative heatshield, a parachute deployment and a final rocket propulsion firing for a soft landing. The destination is ~80 degrees S., the first lander in a polar region. This high latitude region has "layered terrain" which should have water ice near the surface and might show evidence of past climatic variations. Certainly new insights will be gained into the seasonal ice caps (CO2 ice) and polar weather. The lander will have a robotic arm for trenching, cameras, and atmospheric sensors. Its primary mission is 90 days.

19981031-JW

Deep Space 2
Mars Microprobe Impactors

Launch: January 3, 1999

Mars Landing: December, 1999


Deep Space 2 Reference Pages

Deep Space 2 Home Page
nmp.jpl.nasa.gov/ds2

Deep Space 2 (NSSDC)
nssdc.gsfc.nasa.gov
/cgi-bin/database/www-nmc?DEEPSP2

NASA New Millennium Program
nmp.jpl.nasa.gov

DEEP SPACE 2

Piggybacked on the Mars Polar Lander spacecraft are 2 "microprobes". After 11 months in transit the microprobes will separate from the lander spacecraft for a passive atmospheric entry. These spacecraft are designed to survive an 80,000 G impact and be the first probes to gather subsurface data. Scientist hope these probes will help discover clues to Mars' past climate, including the apparent mystery of the "dissapeared" surface water. Does the water that may have caused the erosional features we can see today now exist as permafrost? If so, what implications would that have for possible life forms? Information on soil temperature, ices, air pressure, and solar measurements will all be relayed to the Orbiter, which will be overhead 10 times a day to relay the data back to Earth.

19981031-JW

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