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CX2SA > SATDIG 12.02.09 15:27l 978 Lines 34118 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Satellite Help (Callum Graham)
2. Re: Satellite Help (David - KG4ZLB/M?ZLB)
3. Re: Satellite Help (PE0SAT)
4. Re: Satellite Help (w7lrd@xxxxxxx.xxxx
5. Scratch two sats (Andrew Glasbrenner)
6. Re: Scratch two sats (Andrew Koenig)
7. Re: Satellite Help (tosca005@xxx.xxxx
8. Re: Scratch two sats (Auke de Jong, VE6PWN)
9. AO-7 Mode-A beacon (Auke de Jong, VE6PWN)
10. Iridium and Russian Sats Collide - Minimal Threat to ISS
(Clint Bradford)
11. Re: Scratch two sats (Nigel Gunn G8IFF/W8IFF)
12. Re: Scratch two sats (David Barber)
13. Re: Scratch two sats (David - KG4ZLB/M?ZLB)
----------------------------------------------------------------------
Message: 1
Date: Wed, 11 Feb 2009 20:08:39 +0000 (GMT)
From: Callum Graham <mm3ycg@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Satellite Help
To: amsat-bb@xxxxx.xxx
Message-ID: <548798.55163.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hi all, Im fairly new to working satellites and I want to start using the
satellites AO 7 and FO 29 as Ive not worked them before. Could anyone tell me
the uplink & downlink mid passband frequencies for both satellites plese as It
would make it slightly easyer for me to operate them as I find It difficult
enough as Im only using a vertical antenna :-)
73.....Callum MM3YCG
------------------------------
Message: 2
Date: Wed, 11 Feb 2009 15:24:55 -0500
From: David - KG4ZLB/M?ZLB <m0zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Satellite Help
To: amsat-bb@xxxxx.xxx
Message-ID: <49933417.7030307@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Callum,
AO-7
Mode A - 145.900 up/29.450 down (ssb) (mid)
Mode B - 432.150 up/145.950 down (ssb) (mid)
FO-29
145.950 up (ssb) (mid)
435.850 down (ssb) (mid)
All the information you need is on the AMSAT website under "Sat Status"
And if you are not a member of AMSAT, join and receive a free handy
dandy laminated sheet containing all the frequency information for all
the active birds!
(That's AMSAT NA not AMSAT UK as you don't get one with the UK
membership - in fact you don't seem to get an acknowledgement of payment
for renewing membership either but that's another issue!)
:-(
David
KG4ZLB/M0ZLB
www.kg4zlb.com
Callum Graham wrote:
> Hi all, Im fairly new to working satellites and I want to start using the
satellites AO 7 and FO 29 as Ive not worked them before. Could anyone tell me
the uplink & downlink mid passband frequencies for both satellites plese as It
would make it slightly easyer for me to operate them as I find It difficult
enough as Im only using a vertical antenna :-)
>
> 73.....Callum MM3YCG
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>
------------------------------
Message: 3
Date: Wed, 11 Feb 2009 21:32:19 +0100 (CET)
From: "PE0SAT" <pe0sat@xxxxx.xx>
Subject: [amsat-bb] Re: Satellite Help
To: "Callum Graham" <mm3ycg@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<c4922faf515835ea1a86a5a567cf7524.squirrel@xxxxxxx.xxxxx.xx>
Content-Type: text/plain;charset=iso-8859-1
On Wed, February 11, 2009 21:08, Callum Graham wrote:
Hi Callum,
> Hi all, Im fairly new to working satellites and I want to start using the
> satellites AO 7 and FO 29 as Ive not worked them before. Could anyone
> tell me the uplink & downlink mid passband frequencies for both
> satellites plese as It would make it slightly easyer for me to operate
> them as I find
Look at: http://www.ham.vgnet.nl/?Satellite:Help:Passband
> It difficult enough as Im only using a vertical antenna :-)
I made my first connection also with a vertical, it is not easy but
possible.
> 73.....Callum MM3YCG
73's Jan - PE0SAT
------------------------------
Message: 4
Date: Wed, 11 Feb 2009 22:06:37 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Re: Satellite Help
To: Callum Graham <mm3ycg@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<813415715.753981234389997718.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.x
xxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello Callum
Check out http://www.planetemily.com/ao7/
Also be aware AO-7 will switch over between mode A to B at about 2100Z, then
back to mode A in 24hours.? You will be able to determine what mode it is in
by checking out the log at the above web site.? You are just out of the
footprint from me at CN87.? We'll have to wait for the next HEO.
73 Bob W7LRD
----- Original Message -----
From: "Callum Graham" <mm3ycg@xxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Wednesday, February 11, 2009 12:08:39 PM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] ?Satellite Help
Hi all, Im fairly new to working satellites and I want to start using the
satellites AO 7 and FO 29 as Ive not worked them before. Could anyone tell me
the uplink & downlink mid passband frequencies for both satellites plese as It
would make it slightly easyer for me to operate them as I find It difficult
enough as Im only using a vertical antenna :-)
73.....Callum MM3YCG
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Wed, 11 Feb 2009 19:22:29 -0500
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Scratch two sats
To: <amsat-bb@xxxxx.xxx>
Message-ID: <E7445281337C41719D650C3BFACEE08B@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
http://news.yahoo.com/s/ap/20090211/ap_on_sc/satellite_collision
Iridium versus a Russian satellite, I wonder who'll get the ticket.
73, Drew
CAPE CANAVERAL, Fla. - Two big communications satellites collided in the
first-ever crash of two intact spacecraft in orbit, shooting out a pair of
massive debris clouds and posing a slight risk to the international space
station.
NASA said it will take weeks to determine the full magnitude of the crash,
which occurred nearly 500 miles over Siberia on Tuesday.
"We knew this was going to happen eventually," said Mark Matney, an orbital
debris scientist at Johnson Space Center in Houston.
NASA believes any risk to the space station and its three astronauts is low.
It orbits about 270 miles below the collision course. There also should be
no danger to the space shuttle set to launch with seven astronauts on Feb.
22, officials said, but that will be re-evaluated in the coming days.
The collision involved an Iridium commercial satellite, which was launched
in 1997, and a Russian satellite launched in 1993 and believed to be
nonfunctioning. The Russian satellite was out of control, Matney said.
The Iridium craft weighed 1,235 pounds, and the Russian craft nearly a ton.
No one has any idea yet how many pieces were generated or how big they might
be.
"Right now, they're definitely counting dozens," Matney said. "I would
suspect that they'll be counting hundreds when the counting is done."
As for pieces the size of micrometers, the count will likely be in the
thousands, he added.
There have been four other cases in which space objects have collided
accidentally in orbit, NASA said. But those were considered minor and
involved parts of spent rockets or small satellites.
Nicholas Johnson, an orbital debris expert at the Houston space center, said
the risk of damage from Tuesday's collision is greater for the Hubble Space
Telescope and Earth-observing satellites, which are in higher orbit and
nearer the debris field.
At the beginning of this year there were roughly 17,000 pieces of manmade
debris orbiting Earth, Johnson said. The items, at least 4 inches in size,
are being tracked by the U.S. Space Surveillance Network, which is operated
by the military. The network detected the two debris clouds created Tuesday.
Litter in orbit has increased in recent years, in part because of the
deliberate breakups of old satellites. It's gotten so bad that orbital
debris is now the biggest threat to a space shuttle in flight, surpassing
the dangers of liftoff and return to Earth. NASA is in regular touch with
the Space Surveillance Network, to keep the space station a safe distance
from any encroaching objects, and shuttles, too, when they're flying.
"The collisions are going to be becoming more and more important in the
coming decades," Matney said.
Iridium Holdings LLC has a system of 65 active satellites which relay calls
from portable phones that are about twice the size of a regular mobile
phone. It has more than 300,000 subscribers. The U.S. Department of Defense
is one of its largest customers.
The company has spare satellites, and it is unclear whether the collision
caused an outage. An Iridium spokeswoman had no immediate comment.
Initially launched by Motorola Inc. in the 1990s, Iridium plunged into
bankruptcy in 1999. Private investors relaunched service in 2001.
Iridium satellites are unusual because their orbit is so low and they move
so fast. Most communications satellites are in much higher orbits and don't
move relative to each other, which means collisions are rare.
Iridium Holdings LLC, is owned by New York-based investment firm Greenhill &
Co. through a subsidiary, GHL Acquisition Corp., which is listed on the
American Stock Exchange. The shares closed Wednesday down 3 cents at $9.28.
___
AP science writer Seth Borenstein in Washington and AP technology writer
Peter Svensson in New York contributed to this report.
------------------------------
Message: 6
Date: Wed, 11 Feb 2009 18:37:16 -0600
From: Andrew Koenig <ke5gdb@xxxxx.xxx>
Subject: [amsat-bb] Re: Scratch two sats
To: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<2f52b89b0902111637h616b6d46n7c5d44731bf1b4ac@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Let's hope that this doesn't happen to AO-51, AO-7 or any other birds that
are still in use today.
On another note, it's really quite a small world. Mark Matney (the orbital
debris scientist) was our mentor for the Team America Rocket Challenge
(TARC) rocket that we built at school. We actually thought about putting
APRS in the rocket :-). If I'm not mistaking, he was quite angry when the
Chinese blew up that old meteorological satellite during the TARC class.
73 de KE5GDB
On Wed, Feb 11, 2009 at 6:22 PM, Andrew Glasbrenner <
glasbrenner@xxxxxxxxxx.xxx> wrote:
> http://news.yahoo.com/s/ap/20090211/ap_on_sc/satellite_collision
>
> Iridium versus a Russian satellite, I wonder who'll get the ticket.
>
> 73, Drew
>
> CAPE CANAVERAL, Fla. - Two big communications satellites collided in the
> first-ever crash of two intact spacecraft in orbit, shooting out a pair of
> massive debris clouds and posing a slight risk to the international space
> station.
>
> NASA said it will take weeks to determine the full magnitude of the crash,
> which occurred nearly 500 miles over Siberia on Tuesday.
>
> "We knew this was going to happen eventually," said Mark Matney, an orbital
> debris scientist at Johnson Space Center in Houston.
>
> NASA believes any risk to the space station and its three astronauts is
> low.
> It orbits about 270 miles below the collision course. There also should be
> no danger to the space shuttle set to launch with seven astronauts on Feb.
> 22, officials said, but that will be re-evaluated in the coming days.
>
> The collision involved an Iridium commercial satellite, which was launched
> in 1997, and a Russian satellite launched in 1993 and believed to be
> nonfunctioning. The Russian satellite was out of control, Matney said.
>
> The Iridium craft weighed 1,235 pounds, and the Russian craft nearly a ton.
>
> No one has any idea yet how many pieces were generated or how big they
> might
> be.
>
> "Right now, they're definitely counting dozens," Matney said. "I would
> suspect that they'll be counting hundreds when the counting is done."
>
> As for pieces the size of micrometers, the count will likely be in the
> thousands, he added.
>
> There have been four other cases in which space objects have collided
> accidentally in orbit, NASA said. But those were considered minor and
> involved parts of spent rockets or small satellites.
>
> Nicholas Johnson, an orbital debris expert at the Houston space center,
> said
> the risk of damage from Tuesday's collision is greater for the Hubble Space
> Telescope and Earth-observing satellites, which are in higher orbit and
> nearer the debris field.
>
> At the beginning of this year there were roughly 17,000 pieces of manmade
> debris orbiting Earth, Johnson said. The items, at least 4 inches in size,
> are being tracked by the U.S. Space Surveillance Network, which is operated
> by the military. The network detected the two debris clouds created
> Tuesday.
>
> Litter in orbit has increased in recent years, in part because of the
> deliberate breakups of old satellites. It's gotten so bad that orbital
> debris is now the biggest threat to a space shuttle in flight, surpassing
> the dangers of liftoff and return to Earth. NASA is in regular touch with
> the Space Surveillance Network, to keep the space station a safe distance
> from any encroaching objects, and shuttles, too, when they're flying.
>
> "The collisions are going to be becoming more and more important in the
> coming decades," Matney said.
>
> Iridium Holdings LLC has a system of 65 active satellites which relay calls
> from portable phones that are about twice the size of a regular mobile
> phone. It has more than 300,000 subscribers. The U.S. Department of Defense
> is one of its largest customers.
>
> The company has spare satellites, and it is unclear whether the collision
> caused an outage. An Iridium spokeswoman had no immediate comment.
>
> Initially launched by Motorola Inc. in the 1990s, Iridium plunged into
> bankruptcy in 1999. Private investors relaunched service in 2001.
>
> Iridium satellites are unusual because their orbit is so low and they move
> so fast. Most communications satellites are in much higher orbits and don't
> move relative to each other, which means collisions are rare.
>
> Iridium Holdings LLC, is owned by New York-based investment firm Greenhill
> &
> Co. through a subsidiary, GHL Acquisition Corp., which is listed on the
> American Stock Exchange. The shares closed Wednesday down 3 cents at $9.28.
>
> ___
>
> AP science writer Seth Borenstein in Washington and AP technology writer
> Peter Svensson in New York contributed to this report.
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
--
Andrew Koenig
------------------------------
Message: 7
Date: 11 Feb 2009 19:00:34 -0600
From: tosca005@xxx.xxx
Subject: [amsat-bb] Re: Satellite Help
To: David - KG4ZLB/M?ZLB <m0zlb@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <Prayer.1.0.16.0902111900340.28357@xxxx.xx.xxx.xxx>
Content-Type: text/plain; format=flowed; charset=ISO-8859-1
On Feb 11 2009, David - KG4ZLB/M?ZLB wrote:
>Callum,
>
>AO-7
>
>Mode A - 145.900 up/29.450 down (ssb) (mid)
>Mode B - 432.150 up/145.950 down (ssb) (mid)
NOTE from W?JT: Mode A is NON-INVERTING, so use USB on both the up and down
links, and as you tune HIGHER in the UP link passband you tune HIGHER in
the DOWN link passband.
Mode B is INVERTING, so use LSB on the UP link and USB on the DOWN link. As
you tune HIGHER in the UP link passband you tune LOWER in the DOWN link
passband.
>FO-29
>
>145.950 up (ssb) (mid)
>435.850 down (ssb) (mid)
W?JT sez: Mode J is INVERTING, so use LSB on the UP link and USB on the
DOWN link. As you tune HIGHER in the UP link passband you tune LOWER in the
DOWN link passband.
>
>Callum Graham wrote:
>> Hi all, Im fairly new to working satellites and I want to start using
>> the satellites AO 7 and FO 29 as Ive not worked them before.
73 and good luck on the birds
John P. Toscano, W?JT
AMSAT-NA Life Member #2292
------------------------------
Message: 8
Date: Wed, 11 Feb 2009 20:03:24 -0700
From: "Auke de Jong, VE6PWN" <sparkycivic@xxxx.xx>
Subject: [amsat-bb] Re: Scratch two sats
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <004801c98cbe$7846cab0$6a00a8c0@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I wonder which particular object humbers these were?
Will they dissapear from the next set of Keps?
Was the russian one, a ham one?
73
----- Original Message -----
From: "Andrew Koenig" <ke5gdb@xxxxx.xxx>
To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, February 11, 2009 5:37 PM
Subject: [amsat-bb] Re: Scratch two sats
> Let's hope that this doesn't happen to AO-51, AO-7 or any other birds that
> are still in use today.
>
> On another note, it's really quite a small world. Mark Matney (the orbital
> debris scientist) was our mentor for the Team America Rocket Challenge
> (TARC) rocket that we built at school. We actually thought about putting
> APRS in the rocket :-). If I'm not mistaking, he was quite angry when the
> Chinese blew up that old meteorological satellite during the TARC class.
>
> 73 de KE5GDB
>
> On Wed, Feb 11, 2009 at 6:22 PM, Andrew Glasbrenner <
> glasbrenner@xxxxxxxxxx.xxx> wrote:
>
>> http://news.yahoo.com/s/ap/20090211/ap_on_sc/satellite_collision
>>
>> Iridium versus a Russian satellite, I wonder who'll get the ticket.
>>
>> 73, Drew
>>
>> CAPE CANAVERAL, Fla. - Two big communications satellites collided in the
>> first-ever crash of two intact spacecraft in orbit, shooting out a pair
>> of
>> massive debris clouds and posing a slight risk to the international space
>> station.
>>
>> NASA said it will take weeks to determine the full magnitude of the
>> crash,
>> which occurred nearly 500 miles over Siberia on Tuesday.
>>
>> "We knew this was going to happen eventually," said Mark Matney, an
>> orbital
>> debris scientist at Johnson Space Center in Houston.
>>
>> NASA believes any risk to the space station and its three astronauts is
>> low.
>> It orbits about 270 miles below the collision course. There also should
>> be
>> no danger to the space shuttle set to launch with seven astronauts on
>> Feb.
>> 22, officials said, but that will be re-evaluated in the coming days.
>>
>> The collision involved an Iridium commercial satellite, which was
>> launched
>> in 1997, and a Russian satellite launched in 1993 and believed to be
>> nonfunctioning. The Russian satellite was out of control, Matney said.
>>
>> The Iridium craft weighed 1,235 pounds, and the Russian craft nearly a
>> ton.
>>
>> No one has any idea yet how many pieces were generated or how big they
>> might
>> be.
>>
>> "Right now, they're definitely counting dozens," Matney said. "I would
>> suspect that they'll be counting hundreds when the counting is done."
>>
>> As for pieces the size of micrometers, the count will likely be in the
>> thousands, he added.
>>
>> There have been four other cases in which space objects have collided
>> accidentally in orbit, NASA said. But those were considered minor and
>> involved parts of spent rockets or small satellites.
>>
>> Nicholas Johnson, an orbital debris expert at the Houston space center,
>> said
>> the risk of damage from Tuesday's collision is greater for the Hubble
>> Space
>> Telescope and Earth-observing satellites, which are in higher orbit and
>> nearer the debris field.
>>
>> At the beginning of this year there were roughly 17,000 pieces of manmade
>> debris orbiting Earth, Johnson said. The items, at least 4 inches in
>> size,
>> are being tracked by the U.S. Space Surveillance Network, which is
>> operated
>> by the military. The network detected the two debris clouds created
>> Tuesday.
>>
>> Litter in orbit has increased in recent years, in part because of the
>> deliberate breakups of old satellites. It's gotten so bad that orbital
>> debris is now the biggest threat to a space shuttle in flight, surpassing
>> the dangers of liftoff and return to Earth. NASA is in regular touch with
>> the Space Surveillance Network, to keep the space station a safe distance
>> from any encroaching objects, and shuttles, too, when they're flying.
>>
>> "The collisions are going to be becoming more and more important in the
>> coming decades," Matney said.
>>
>> Iridium Holdings LLC has a system of 65 active satellites which relay
>> calls
>> from portable phones that are about twice the size of a regular mobile
>> phone. It has more than 300,000 subscribers. The U.S. Department of
>> Defense
>> is one of its largest customers.
>>
>> The company has spare satellites, and it is unclear whether the collision
>> caused an outage. An Iridium spokeswoman had no immediate comment.
>>
>> Initially launched by Motorola Inc. in the 1990s, Iridium plunged into
>> bankruptcy in 1999. Private investors relaunched service in 2001.
>>
>> Iridium satellites are unusual because their orbit is so low and they
>> move
>> so fast. Most communications satellites are in much higher orbits and
>> don't
>> move relative to each other, which means collisions are rare.
>>
>> Iridium Holdings LLC, is owned by New York-based investment firm
>> Greenhill
>> &
>> Co. through a subsidiary, GHL Acquisition Corp., which is listed on the
>> American Stock Exchange. The shares closed Wednesday down 3 cents at
>> $9.28.
>>
>> ___
>>
>> AP science writer Seth Borenstein in Washington and AP technology writer
>> Peter Svensson in New York contributed to this report.
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
>
>
>
> --
> Andrew Koenig
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------------------------------------------------------
--
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07:20:00
------------------------------
Message: 9
Date: Wed, 11 Feb 2009 20:18:13 -0700
From: "Auke de Jong, VE6PWN" <sparkycivic@xxxx.xx>
Subject: [amsat-bb] AO-7 Mode-A beacon
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <004f01c98cc0$8a70d670$6a00a8c0@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
I have never witnessed the Mode-A beacon... untill now!
I don't believe that it has been reported to be working for a very long
time...
I saw it tonight on the waterfall display on my modified Wilson CB mag-mount
vertical during orbit # 56704, about 03:00UTC, for most of the pass. It did
not appear to be modulated, although I could not hear it to know for sure,
only by visual on the spectrum display.
73's
Auke de Jong
VE6PWN
DO33go
Edmonton, AB
------------------------------
Message: 10
Date: Wed, 11 Feb 2009 21:58:30 -0800
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Iridium and Russian Sats Collide - Minimal Threat
to ISS
To: amsat-bb@xxxxx.xxx
Message-ID: <39726855-1630-4857-9E97-963F3FA4A7F8@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
The two satellites collided at 780km over Siberia. Hundreds of pieces
are being tracked.
SOURCES: NASA, BBC
Clint Bradford, K6LCS / KAF3359
909-241-7666
------------------------------
Message: 11
Date: Thu, 12 Feb 2009 13:12:50 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Scratch two sats
To: "Auke de Jong, VE6PWN" <sparkycivic@xxxx.xx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <49942052.2000403@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Nothing in the change list on Spacetrack yet and nothing looking suspicious in
the Irridium keps.
Auke de Jong, VE6PWN wrote:
> I wonder which particular object humbers these were?
> Will they dissapear from the next set of Keps?
> Was the russian one, a ham one?
>
> 73
>
> ----- Original Message -----
> From: "Andrew Koenig" <ke5gdb@xxxxx.xxx>
> To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
> Cc: <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, February 11, 2009 5:37 PM
> Subject: [amsat-bb] Re: Scratch two sats
>
>
>> Let's hope that this doesn't happen to AO-51, AO-7 or any other birds that
>> are still in use today.
>>
>> On another note, it's really quite a small world. Mark Matney (the orbital
>> debris scientist) was our mentor for the Team America Rocket Challenge
>> (TARC) rocket that we built at school. We actually thought about putting
>> APRS in the rocket :-). If I'm not mistaking, he was quite angry when the
>> Chinese blew up that old meteorological satellite during the TARC class.
>>
>> 73 de KE5GDB
>>
>> On Wed, Feb 11, 2009 at 6:22 PM, Andrew Glasbrenner <
>> glasbrenner@xxxxxxxxxx.xxx> wrote:
>>
>>> http://news.yahoo.com/s/ap/20090211/ap_on_sc/satellite_collision
>>>
>>> Iridium versus a Russian satellite, I wonder who'll get the ticket.
>>>
>>> 73, Drew
>>>
>>> CAPE CANAVERAL, Fla. - Two big communications satellites collided in the
>>> first-ever crash of two intact spacecraft in orbit, shooting out a pair
>>> of
>>> massive debris clouds and posing a slight risk to the international space
>>> station.
>>>
>>> NASA said it will take weeks to determine the full magnitude of the
>>> crash,
>>> which occurred nearly 500 miles over Siberia on Tuesday.
>>>
>>> "We knew this was going to happen eventually," said Mark Matney, an
>>> orbital
>>> debris scientist at Johnson Space Center in Houston.
>>>
>>> NASA believes any risk to the space station and its three astronauts is
>>> low.
>>> It orbits about 270 miles below the collision course. There also should
>>> be
>>> no danger to the space shuttle set to launch with seven astronauts on
>>> Feb.
>>> 22, officials said, but that will be re-evaluated in the coming days.
>>>
>>> The collision involved an Iridium commercial satellite, which was
>>> launched
>>> in 1997, and a Russian satellite launched in 1993 and believed to be
>>> nonfunctioning. The Russian satellite was out of control, Matney said.
>>>
>>> The Iridium craft weighed 1,235 pounds, and the Russian craft nearly a
>>> ton.
>>>
>>> No one has any idea yet how many pieces were generated or how big they
>>> might
>>> be.
>>>
>>> "Right now, they're definitely counting dozens," Matney said. "I would
>>> suspect that they'll be counting hundreds when the counting is done."
>>>
>>> As for pieces the size of micrometers, the count will likely be in the
>>> thousands, he added.
>>>
>>> There have been four other cases in which space objects have collided
>>> accidentally in orbit, NASA said. But those were considered minor and
>>> involved parts of spent rockets or small satellites.
>>>
>>> Nicholas Johnson, an orbital debris expert at the Houston space center,
>>> said
>>> the risk of damage from Tuesday's collision is greater for the Hubble
>>> Space
>>> Telescope and Earth-observing satellites, which are in higher orbit and
>>> nearer the debris field.
>>>
>>> At the beginning of this year there were roughly 17,000 pieces of manmade
>>> debris orbiting Earth, Johnson said. The items, at least 4 inches in
>>> size,
>>> are being tracked by the U.S. Space Surveillance Network, which is
>>> operated
>>> by the military. The network detected the two debris clouds created
>>> Tuesday.
>>>
>>> Litter in orbit has increased in recent years, in part because of the
>>> deliberate breakups of old satellites. It's gotten so bad that orbital
>>> debris is now the biggest threat to a space shuttle in flight, surpassing
>>> the dangers of liftoff and return to Earth. NASA is in regular touch with
>>> the Space Surveillance Network, to keep the space station a safe distance
>>> from any encroaching objects, and shuttles, too, when they're flying.
>>>
>>> "The collisions are going to be becoming more and more important in the
>>> coming decades," Matney said.
>>>
>>> Iridium Holdings LLC has a system of 65 active satellites which relay
>>> calls
>>> from portable phones that are about twice the size of a regular mobile
>>> phone. It has more than 300,000 subscribers. The U.S. Department of
>>> Defense
>>> is one of its largest customers.
>>>
>>> The company has spare satellites, and it is unclear whether the collision
>>> caused an outage. An Iridium spokeswoman had no immediate comment.
>>>
>>> Initially launched by Motorola Inc. in the 1990s, Iridium plunged into
>>> bankruptcy in 1999. Private investors relaunched service in 2001.
>>>
>>> Iridium satellites are unusual because their orbit is so low and they
>>> move
>>> so fast. Most communications satellites are in much higher orbits and
>>> don't
>>> move relative to each other, which means collisions are rare.
>>>
>>> Iridium Holdings LLC, is owned by New York-based investment firm
>>> Greenhill
>>> &
>>> Co. through a subsidiary, GHL Acquisition Corp., which is listed on the
>>> American Stock Exchange. The shares closed Wednesday down 3 cents at
>>> $9.28.
>>>
>>> ___
>>>
>>> AP science writer Seth Borenstein in Washington and AP technology writer
>>> Peter Svensson in New York contributed to this report.
>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>> program!
>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>>
>>
>>
>> --
>> Andrew Koenig
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
> ----------------------------------------------------------------------------
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>
>
>
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>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF W8IFF (was KC8NHF)
1865 El Camino Drive, Xenia, OH 45385-1115, USA 937 825 5032
e-mail nigel@xxxxx.xxx www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
------------------------------
Message: 12
Date: Thu, 12 Feb 2009 13:33:31 -0000
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Re: Scratch two sats
To: "'amsat-bb'" <amsat-bb@xxxxx.xxx>
Message-ID: <6C72245CC0964B50B228105C924DF422@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
It just made the national 13.00 BBC News here in the UK.
David
G8OQW
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Nigel Gunn G8IFF/W8IFF
Sent: 12 February 2009 13:13
To: Auke de Jong, VE6PWN
Cc: AMSAT-BB
Subject: [amsat-bb] Re: Scratch two sats
Nothing in the change list on Spacetrack yet and nothing looking suspicious
in the Irridium keps.
------------------------------
Message: 13
Date: Thu, 12 Feb 2009 08:41:30 -0500
From: David - KG4ZLB/M?ZLB <m0zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Scratch two sats
To: david.barber@xxxxxxxxxxxxx.xx.xx
Cc: 'amsat-bb' <amsat-bb@xxxxx.xxx>
Message-ID: <4994270A.8090403@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I suppose looking on the bright side we could be in for a hell of a
"meteor" shower with the possibility of working meteor scatter in the
near future!
David
KG4ZLB/M0ZLB
www.kg4zlb.com
David Barber wrote:
> It just made the national 13.00 BBC News here in the UK.
>
> David
> G8OQW
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Nigel Gunn G8IFF/W8IFF
> Sent: 12 February 2009 13:13
> To: Auke de Jong, VE6PWN
> Cc: AMSAT-BB
> Subject: [amsat-bb] Re: Scratch two sats
>
> Nothing in the change list on Spacetrack yet and nothing looking suspicious
> in the Irridium keps.
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 4, Issue 71
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