Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: NASA создает новый космический телескоп
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NASA создает новый космический телескоп
[BUSINESS WIRE] Закончено строительство нового и самого мощного на
сегодняшний день научного спутника NASA. Это - космический рентгеновский
телескоп Chandra X-ray Observatory, который стал третьим в семействе
космических обсерваторий NASA, в которое уже входит телескоп Hubble и
гамма-телескоп Compton Gamma Ray Observatory.
В процессе строительства этот спутник был известен под названием
Advanced X-ray Astrophysics Facility (AXAF), но в декабре прошлого года он был
переименован в честь нобелевского лауреата одного из известнейших
астрофизиков ХХ века индийца по происхождению Субрахманьяна
Чандрасекхара (Subrahmanyan Chandrasekhar), которого друзья и коллеги
называли просто "Чандра" (в переводе с санскрита "луна" и "просвещенный").
В конце января спутник Chandra, длина которого составляет 13,7 м будет
доставлен в космический центр им. Кеннеди, где он будет установлен на
"шаттл" Columbia, старт которого намечен на 8 апреля 1999 г. Телескоп Chandra
будет выведен в космос экипажем Columbia, возглавляемым Эйлин Коллинз
(Eileen Collins).
Вес нового научного спутника превышает 5 тонн, размах крыльев его
солнечных батарей составит 19,5 м.
Источник: InfoArt News Agency
Hа сегодня все, пока!
=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Зимний ветер на Марсе
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Зимний ветер на Марсе
Космический корабль Mars Global Surveyor прибыл к Марсу в сентябре 1997
г., но только в августе 1998 г. он смог начать присылать изображения северной
полярной шапки, где огромные территории песчаных дюн (на снимке слева) во
время марсианской зимы покрываютс толстым слоем льда. Затем ветры выдувают в
ледовых дюнах глубокие каньоны и получаетс картина, изображенная на снимке
справа. И так повторяется каждую зиму.
Эти изображения помогут ученым определить силу ветровой эрозии
марсианской поверхности. Hесмотря на высокую скорость дующих ветров, сама
атмосфера на Марсе очень тонкая. Сейчас на северной полярной шапке Марса
началась весна. Через несколько недель лед, покрывающий дюны из пыли, начнет
таять. За этим процессом тоже должен проследить Mars Global Surveyor.
Источник: InfoArt News Agency
Hа сегодня все, пока!
=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Зимний ветер на Марсе (картинка 1)
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MY%`$21A>U`$F/:@!0H/%`$?V="Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Зимний ветер на Марсе (картинка 2)
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M`=ZT(M$U.9#)%83LGKMQ_.NS\/Z59QZ=:3I&L
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Запуск ракеты Delta откладывается в третий раз
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Запуск ракеты Delta откладывается в третий раз
[SpaceViews] Запуск ракеты Delta с тремя спутниками на борту отложен уже
в третий раз. Hа этот раз старт был намечен на 19 января, но из-за плохих
погодных условий он перенесен еще на сутки. Запуск должен состояться с
космодрома базы ВВС США Ванденберг. Delta выведет в космос 3 спутника -
исследовательский спутник ВВС США ARGOS весом более 2700 кг, датский научный
спутник Orsted и небольшой южно-африканский телекоммуникационный спутник
SUNSAT.
Источник: InfoArt News Agency
Hа сегодня все, пока!
=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Запуск ракеты Delta откладывается в третий раз (картинка)
Привет всем!
Вот, свалилось из Internet...
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?B1=K/G!.#BBBAR:Z`DV]G]R%\QN..>:***SДата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Mars Surveyor Update - January 15, 1999
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Mars Surveyor
Project Status Report Overview
Prepared by Mars Surveyor Operations Project Manager
NASA Jet Propulsion Laboratory
Friday 15 January 1999
Mars Polar Lander
Mars Polar Lander continues in a healthy cruise state. During the past week,
the flight team restarted normal attitude control processing using the star
camera, successfully corrected a software bug in the on-board attitude
control software that caused excessive thruster activity at attitude control
mode changes, and slewed the spacecraft to the modified earth point
orientation that is the nominal orientation for the start of its trajectory
correction maneuver. As the result of the amount of flight team support
required for these three activities, the first trajectory correction
maneuver, previously scheduled for Monday, January 18th, has been put off
until Thursday, January 21st, with very minimal effect on the fuel required.
Future activities, in addition to the trajectory correction maneuver, will
include spacecraft reorientations to assess stray light impacts on the star
camera performance, and reconfiguring the spacecraft state for the long term
early cruise conditions.
Mars Climate Orbiter
Mars Climate Orbiter continues in a minimal activity cruise state with
minimal Deep Space Network (DSN) tracking. The spacecraft is very healthy.
Mars Global Surveyor
Mars Global Surveyor (MGS) continues in the final weeks of aerobraking. With
the
end of aerobraking in sight, the weekly aerobraking control operations will
deviate from the previous strategy of managing primarily the dynamic
pressure, to a more intense assessment of the other factors contributing to
the final orbit conditions. These include local mean solar time, orbital
inclination, apoapsis altitude reduction increments, as well as dynamic
pressure. Current aerobraking perform indicates a slightly earlier
conclusion of aerobraking with the current estimate of walkout beginning on
January 31st and termination of aerobraking on February 5th. At the time of
this writing (1/15/99 @ 3 PM PST), MGS is in its 1079th orbit with an
orbital period of 2.85 hours. The spacecraft is very healthy. Magnetometer /
electron reflectometer instruments' and radio science occultation data
continue to be acquired. Magnetometer data acquisition will continue until
the January 28th, which is the date of the southern most progression of the
orbit's periapsis.
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Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Mars Surveyor 98 Update - January 16, 1999
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MARS SURVEYOR 98 MISSION STATUS
January 16, 1999
Mars Polar Lander
Mars Polar Lander is now in its nominal attitude for early cruise, while
being tracked 2-3 times per day by 34 meter Deep Space Network (DSN) stations.
Now under the control of its first housekeeping command sequence, the
spacecraft continues to perform well. The first planned course correction,
TCM-1, has been moved from Jan. 18 to Jan. 21, to allow sufficient time to
complete software updates and reconfiguration of the lander needed for early
cruise.
At the beginning of this week, four principal tasks were identified by
the flight team that needed to be accomplished prior to executing TCM-1.
These are 1) restart stellar-aided attitude determination system and verify
its performance, 2) install software patch to the lander to eliminate the
autopilot anomaly identified last week, 3) slew lander to the baseline
attitude for early cruise, and 4) complete transition of the software
system to early cruise configuraton. The first three tasks are complete,
with the remaining task scheduled for completion early Tuesday morning of
next week (Jan. 19).
Star camera processing and the lander's stellar-aided atittude
determination software were reactivated on Wednesday morning (Jan. 13), and
functioned perfectly; at that time the spacecraft was still in its initial
post-launch attitude. Over the course of the previous week, it was found
that the lander's attitude knowledge, based soley on gyroscope
computations, had drifted in error by only one degree, a testament to the
extraordinary performance of the spacecraft's Honeywell ring-laser gyro
system. In addition, an update to the thermal control software startup
configuration file was peformed to prevent any reoccurrence of the thermal
control anomaly observed the previous week. On Thursday morning (Jan. 14),
the autopilot software patch was successfully loaded, and the autopilot
restarted without incident. On Friday morning, the lander was commanded at
14:30 UTC to slew approximately 20 deg to bring the Earth further into the
medium-gain antenna pattern, allowing high-data rate communications to be
maintained well into February. This is the planned early cruise attitude.
Preparations for TCM-1 are proceeding on schedule for a Jan. 21
execution date. Following this maneuver, the flight team will conduct a
series of rotational maneuvers with the lander, designed to characterize
the attitude envelope over which the star camera is presented with a
sufficiently dark field of view allowing star pattern recognition.
Mars Climate Orbiter
Mars Climate Orbiter is now being monitored during a single tracking
pass per day. The spacecraft's second housekeeping sequence was loaded
Tuesday morning (Jan. 12) and is now operating nominally. At that time the
same thermal control configuration file described for the lander above was
loaded onto the orbiter, to prevent any occurrence of an anomaly like that
observed on the lander, due to the commonality in the two vehicle's
software systems.
Although the orbiter's second course course correction, TCM-2, is
scheduled for January 25, this event may well be moved, due to the
additional work that was identified as needed prior to the lander's TCM-1.
The flight team will establish the target date for TCM-2 on the orbiter
early next week, following more assessment of the lander tasks that need to
be accomplished following TCM-1.
For more information on the Mars Surveyor 98 missions, please visit
our website at:
http://mars.jpl.nasa.gov/msp98
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=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: G-force scientist to test ideas for NASA (Forwarded)
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Air Force News Service
Released: 15 Jan 1999
G-force scientist to test ideas for NASA
By Rudy Purificato, Air Force Research Laboratory
BROOKS AIR FORCE BASE, Texas (AFPN) -- As the shuttle Endeavour space
walkers eyed the first pieces of the new international space station
recently, a Brooks Air Force Base scientist eyed the progress with plans
to help speed future astronauts' return to Earth.
Dr. Russ Burton, National Aeronautics and Space Administration consultant
and former Air Force Research Laboratory scientist, is working with human
physiology scientists here to design a centrifuge for the international
space station. Frequent G-force exposure via the centrifuge while in
space, which has no gravity, will help astronauts re-adapt to Earth's
gravity more quickly than through previous methods used by NASA and the
Russians, he said.
"NASA is interested in it (space centrifuge) to prevent deconditioning in
astronauts," the former Human Effectiveness Directorate senior scientist
said. "I think it would be very effective. You don't have to be exposed to
gravity 24 hours a day to maintain your adaptation to gravity."
Burton's idea is to expose astronauts to daily doses of gravity in the
space station centrifuge so astronauts will be adapted to Earth's gravity
by the time they arrive back home. He first proposed his idea to the
scientific community in a June 1988 Aviation, Space and Environmental
Medicine magazine article titled "A Human-Use Centrifuge for Space
Stations: Proposed Ground-Based Studies."
Past space travelers have been plagued back on Earth with weightlessness-
induced physiological problems ranging from muscle atrophy to symptoms
associated with osteoporosis.
Retired astronaut John Blaha, who served aboard the Russian space station
Mir, admitted problems walking when he returned. In fact, Blaha used a
wheelchair until he was strong enough to walk on his own.
"It makes no sense to be in space for six months and come back to Earth
and you can't walk," Burton said. "When we (eventually) travel to Mars,
which will take six months to a year to get there, what good will you be
when you arrive and can't walk?"
Burton said NASA has realized its current exercise program for astronauts
involved in long-duration missions hasn't helped them fully re-adapt to
Earth's gravity.
For the past 27 years, the veterinarian-turned-scientist has been helping
Air Force air crews adapt to G-force-induced, in-flight stresses.
Some of Burton's most recent contributions to aviation science include his
work involving cervical spine injuries pilots suffer from prolonged
exposure to high G-forces.
Andrew Yee
ayee@nova.astro.utoronto.ca
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=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Barbara Wilson Named Head Of Microelectronics Center At JPL
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MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109 TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov
Contact: John G. Watson
FOR IMMEDIATE RELEASE January 19, 1998
WILSON NAMED HEAD OF MICROELECTRONICS CENTER
Dr. Barbara Wilson has been named program manager for the
Center for Space Microelectronics Technology at NASA's Jet
Propulsion Laboratory, Pasadena, CA. She will also serve as
JPL's chief technologist.
The Center for Space Microelectronics Technology was founded
in 1987 to develop high-risk, high-payoff concepts and devices to
enable future space missions and to enhance current and planned
missions. The center conducts research and development in such
fields as solid-state devices, photonics, custom micro-circuits
and advanced computing.
Wilson succeeds Dr. Carl Kukkonen, who left JPL last fall to
head a new company, ViaSpace Technologies LLC of Pasadena, CA.
As JPL's chief technologist, Wilson's office will provide
strategic leadership and integration for all aspects of
technology development throughout the Laboratory. Both positions
are effective February 11.
A physicist with a doctorate from the University of
Wisconsin-Madison and a bachelor's degree from Mount Holyoke
College in Massachusetts, Wilson joined JPL in 1988 as technical
group supervisor of the Microdevices Section. Shortly thereafter
she was named manager of the Microdevices Laboratory, a facility
operating under the umbrella of the Center for Space
Microelectronics Technology.
She most recently served as program manager for JPL's Earth
Science Program Office and technologist for NASA's New Millennium
Program, which sponsors spacecraft missions designed to test new
technologies so that they may be confidently used on science
missions of the future. She is the recipient of the NASA Special
Achievement Medal for her contributions to the New Millennium
Program.
Before joining JPL, she served as supervisor of the
Optoelectronic Materials Research Group at AT&T Bell Labs, where
she was awarded the company's exceptional contribution award for
her work in semiconductor devices.
A fellow of the American Physical Society and a senior
member of the Institute of Electrical and Electronics Engineers
(IEEE), Wilson has served as a member of the U.S. Air Force
Scientific Advisory Board and has chaired NASA workshops on
sensor technologies, applications of microtechnologies to space
systems, and technology for miniature spacecraft.
JPL is a division of the California Institute of Technology,
Pasadena, CA.
#####
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=SANA=
Дата: 21 января 1999 (1999-01-21)
От: Alexander Bondugin
Тема: Mars Global Surveyor Aerobraking Update - January 18, 1999
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Mars Global Surveyor Aerobraking Status Report
Thursday, January 18, 1999 (DOY 014/19:00:00 to DOY 018/19:00:00 UTC)
Last Orbit Covered by this Report = 1104
Total Phase I Aerobraking orbits accomplished = 180
Total Phase II Aerobraking orbits accomplished = 529
Total Science Phasing orbits accomplished = 290
Apoapsis altitude = 2470.8 km
Apoapsis altitude decrease since start of aerobraking = 51555.1 km
Periapsis altitude = 106.5 km
Current Orbit Period = 02:41:21
Orbit Period decrease since start of aerobraking = 42:18:12
Starting Phase II orbit period = 11:38:02
RECENT EVENTS:
The Mars Global Surveyor spacecraft continues excellent aerobraking
performance. Over 12.5 minutes have been removed from the orbit period in
the past 35 drag passes. The Navigation Team has been tracking performance
in terms of apoapsis altitude reduction rather than per orbit dynamic
pressure or period reduction. The apoapsis altitude has been dropping at the
rate of 13.5 km per drag pass compared to the desired decay rate for the
reset 19 period 14.4 km per pass. The dynamic pressure 9-orbit running mean
is now 0.188 N/m2 which is a little higher than the original baseline
predicted, but is required to maintain the current desired trajectory. A
periapsis lowering maneuver was ordered for the apoapsis portion of orbit
1104 but was removed from the uplink queue when later drag results showed
more favorable apoapsis reduction. To maintain the desired apoapsis
reduction, dynamic pressures of about 0.17 N/m2 must be averaged through
this reset period. Predictions continue to show very slight increase in
atmospheric density for the coming 2 weeks, even though the periapsis
altitude continues to cycle lower
Currently, sequence P1097 is controlling the S/C activities. It will be
replaced later this afternoon with P1106 which will control activities
starting with orbit 1106 through orbit 1114. No backup orbits were executed
this period. All sequences will contained 9 primary and 4 backup orbits to
maintain a prime shift built, once per day. All periapsis timing predictions
have been very good therefore no special, non-scheduled sequences were
required.
Subsystems continue to report excellent S/C health and performance. The -Y
solar array yoke has shown no change in structural performance. Attitude
knowledge has been maintained throughout the period with excellent star
processing. The power subsystem reports strong performance with battery
discharge depths still reaching 32% each drag pass with 31% being
contributed due to the 37 minute eclipse. The minimum MOLA laser temperature
observed this period was 11.5°C with a slight upward trend observed due to
the decreasing orbit period. The telecommunications subsystem continues
solid performance although one file (P1071) radiated to the S/C this period
required re-transmitting due to bit errors. There is no indication of any
S/C or ground equipment problems and it is believed that the cause of the
bit errors may be due to degrading station predicts as the orbit timing
drifts coupled with shorter orbits.
UPCOMING EVENTS:
Periapsis for Orbit 1105 DOY018/20:58:23 Through
Periapsis for Orbit 1122 DOY020/17:46:44 UTC
(Note: MST = UTC-7 hours DOY018=1/18)
SPACECRAFT COMMANDING:
There were 9 command files radiated to the S/C during this period. The total
files radiated since launch is now 3172. These commands were sent in support
of the following activities:
Nominal drag pass sequences (P1071, P1080, P1088, P1097)
Nominal corridor control maneuver sequences (None)
Command loss timer resets
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=SANA=
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