[FWD] Congress tells NASA not to give up on manned Hubble service mission

http://www.cnn.com/2004/TECH/space/07/13/hubble.fix/

....Looks like *possibly* Congress has at least two pairs of balls
between them for a change.

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr

I have been away from the group for a while.
What is the science involved for the following questions

Could Hubble be captured and have its orbit changed to be in a better orbit
so a service mission could get to ISS in an emergency?

Assume the following:
Hubble stays in current orbit.
Service mission is flown to Hubble with max flight duration supplies and
equipment.
If a shuttle had to get from Hubble to station for emergency can that be
done.

I am asking the science here, money and politics later.

"OM" om@our_blessed_lady_mary_of_the_holy_NASA_researc h_facility.org wrote
in message ...
http://www.cnn.com/2004/TECH/space/07/13/hubble.fix/

...Looks like *possibly* Congress has at least two pairs of balls
between them for a change.

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr

"Joe Hecht" wrote in
ink.net:

Could Hubble be captured and have its orbit changed to be in a better
orbit so a service mission could get to ISS in an emergency?

Not practical with conventional propulsion. And the vicinity of ISS is not
a particularly good place for HST to be, due to contamination issues and a
too-low altitude.

It could perhaps be possible with ion propulsion, and one company is
proposing a vehicle to do that. See other thread for URL. In any case the
big challenge will be autonomous (or even teleoperated) rendezvous and
capture of a non-cooperative target. Again, see other thread for
discussion.

Assume the following:
Hubble stays in current orbit.
Service mission is flown to Hubble with max flight duration supplies
and equipment.
If a shuttle had to get from Hubble to station for emergency can that
be done.

No, absolutely not, not just "no" but "Hell No". You could pack a shuttle
to the brim with propellant and still only have a fraction of what would be
required to reach ISS from HST's current orbit.

--
JRF

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No, absolutely not, not just "no" but "Hell No". You could pack a shuttle
to the brim with propellant and still only have a fraction of what would
be
required to reach ISS from HST's current orbit.

--
JRF

Can you tell us the orbital inclinations of the ISS and HST?


Thanks,
JD

No, absolutely not, not just "no" but "Hell No". You could pack a
shuttle
to the brim with propellant and still only have a fraction of what would
be
required to reach ISS from HST's current orbit.

--
JRF

Can you tell us the orbital inclinations of the ISS and HST?


Thanks,
JD


ISS is at about 56 degrees, HST is at about 28.5

JC
IN

"OM" om@our_blessed_lady_mary_of_the_holy_NASA_researc h_facility.org wrote
in message ...
...Looks like *possibly* Congress has at least two pairs of balls
between them for a change.

Hillary willing to share?

No, absolutely not, not just "no" but "Hell No". You could pack a
shuttle
to the brim with propellant and still only have a fraction of what would
be
required to reach ISS from HST's current orbit.

--
JRF

Can you tell us the orbital inclinations of the ISS and HST?


Thanks,
JD


ISS is at about 56 degrees, HST is at about 28.5

JC
IN


Easier to retrieve hubble, bring it home for refurbishing here on earth, then
relaunch in a ISS friendly orbit later.
HAVE A GREAT DAY!

In article ,
bob haller wrote:

Easier to retrieve hubble, bring it home for refurbishing here on earth, then
relaunch in a ISS friendly orbit later.
HAVE A GREAT DAY!

How would you retrieve Hubble? Surely designing something to rendez-vous with
it, capture it (would have to be pretty big, woudn't it), re-enter
softly enough not to damage would be more work than simply designing
some kind of tug to move it to ISS orbit.

Nick

"Joe Delphi" wrote in
ink.net:

No, absolutely not, not just "no" but "Hell No". You could pack a
shuttle to the brim with propellant and still only have a fraction of
what would be
required to reach ISS from HST's current orbit.

Can you tell us the orbital inclinations of the ISS and HST?

Certainly. The most recent elements for both are he

http://www.celestrak.com/

Specifically:

http://www.celestrak.com/NORAD/elements/stations.txt
http://www.celestrak.com/NORAD/elements/science.txt

which gives inclinations of 28.4674 for HST, 51.6302 for ISS. YMMV, since
these files are updated regularly.

Of course, the inclination difference is only half the problem, since the
RAANs are also constantly changing due to differential nodal regression.
The delta-V for a plane change could vary between 3.04 and 9.75 km/s
depending on the delta-RAAN. At the higher end, you're indeed better off
returning HST to Earth and re-launching, since orbital velocity is only
around 7.7 km/s.

But in no case is it possible for a shuttle to do an on-orbit plane change
between the two. The shuttle's OMS tanks have a delta-V capability of
around 0.3 km/s, half of which is required for insertion and deorbit.

--
JRF

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(Nicholas Fitzpatrick) wrote in
:

In article ,
bob haller wrote:

Easier to retrieve hubble, bring it home for refurbishing here on
earth, then relaunch in a ISS friendly orbit later.
HAVE A GREAT DAY!

How would you retrieve Hubble?

Same way it was retrieved on four previous occasions, perhaps?

Surely designing something to
rendez-vous with it, capture it (would have to be pretty big, woudn't
it), re-enter softly enough not to damage would be more work than
simply designing some kind of tug to move it to ISS orbit.

How is that tug not going to have the same rendezvous and capture problem?

--
JRF

Reply-to address spam-proofed - to reply by E-mail,
check "Organization" (I am not assimilated) and
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