Skip to comments.Pentagon Opens Window of Time to Shoot Down Satellite
Posted on 02/20/2008 3:58:23 PM PST by SandRat
WASHINGTON, Feb. 20, 2008 The Pentagon has opened the window of time in which it will shoot down a malfunctioning U.S. reconnaissance satellite, a senior U.S. military officer said here today.
Todays return of the space shuttle Atlantis to Earth prompted the start of the optimal time period for shooting down the satellite, which extends until about the end of the month, the senior officer told Pentagon reporters.
Only tens of seconds will be available each day for a favorable launch of a ship-based SM-3 interceptor missile, the senior officer said. The window is small, but were looking for the best orientation of the satellite before launching the missile, the officer explained.
The 5,000-pound satellite malfunctioned soon after it was launched in 2006, making it unresponsive to ground control. It is carrying a tank full of hydrazine, a toxic rocket fuel. The satellite, orbiting every 90 minutes or so, was expected to fall to Earth in February or March with its tank of hydrazine intact, possibly endangering human populations.
President Bush directed the Defense Department to engage the satellite just before it enters the atmosphere at about 150 miles above the Earth. The goal is for the missile to hit and rupture the tank of rocket fuel, causing the hydrazine to burn up harmlessly in the atmosphere, along with debris from the stricken satellite.
About 50 percent of debris produced by the missile strike is expected to burn up during the stricken satellites first two orbits after being hit, the senior military officer said, with the rest burning up shortly after. The strike is designed to leave no space debris.
Defense Secretary Robert M. Gates is to give the order to launch, based upon commanders recommendations, the senior officer said. Gates will be advised as to the optimal time to launch by the commander of U.S. Strategic Command, based at Offutt Air Force Base, in Omaha, Neb.
All space sensor and missile-tracking activity related to the missile launch is being coordinated by the Joint Space Operations Center, at Vandenberg Air Force Base, Calif. Sensors, such as large radars and telescopes, are being coordinated by the Joint Integrated Missile Defense Team in Colorado Springs, Colo., under the U.S. Armys Space and Missile Defense Command.
Three U.S. Navy ships -- the cruiser USS Lake Erie and the destroyers USS Decatur and USS Russell -- are posted in the Pacific Ocean waiting for an optimal time to launch, the senior officer said. The Erie is slated to shoot at the satellite, and it is fitted with two SM-3 missiles. The Decatur has one, and the Russell has none. The missiles were modified to carry additional sensor equipment for the mission, the senior officer said.
The launch will be conducted during daytime over the Pacific, the senior officer explained, so that all sensors involved can better track the results of the missile launch. Necessary criteria for launch include satisfactory alignment of all pre-launch sensor-supplied data, as well as favorable weather conditions, he said.
Currently, the wave height about the ships is unfavorable to launch, the officer said. However, this and other conditions are subject to change, he added.
This isn’t an issue when going up against non-state foes, but if we should have to confront any major power, you can see what the first targets are going to be.
Punch out your enemy’s satelites, and you’ve punched out his lights.
I’m sure there are smart people thinking about this, on both sides.
It's called land debris when it crashes into your backyard.
I think they’ll nail it. First shot.
Hope so,.. son is an civilian aerospace engineer on the project.
I'm an engineer and was just thinking about how kewl it would be to work on a project like this. Big props to your son.
Let’s do this!!!!!!
Jeepers it has been an exciting day. The shuttle landed. Eclipse in a few hours. And shooting down the satellite!
If they miss, and you see the missile or the satellite headed for you in a fiery ball, put your head FIRMLY between your knees, and kiss your ass good bye!
My husband is an engineer. Dow Chemical Co. 35 years.
Kick the tires and light the fires!!
OUCH! We just finished remodeling, took EIGHT months! I hope we don’t get zapped by it. It was neat living in So. Cal. sometimes you could see the fireworks when they shot down a missile during testing. I think from vandenberg AFB
Who’s going to start a live LUNAR ECLIPSE + ASAT popcorn thread?
YOU CAN! I will go get the beer!
Who has clear skies for the eclipse? it is raining here in Houston and on the coast. DRAT
Looking at the map, it looks like they’ll have a chance on the next orbit.
by Dauna Coulter
Washington DC (SPX) Feb 21, 2008
. . .
How long will it take for the moon to be encircled with satellite traffic like Earth? Not very long, with the current moon rush. By the end of 2011, nine satellites could be buzzing around up there.
So we might get an artificial meteor shower out of this?
What does your son think about the chances? If you don’t mind me asking.
I hope they tape it and put it up on YouTube.
I’m tracking it now real time via STSPLUS..
Sea Bouy Midway Island:
Wind Speed (WSPD): 0.0 kts
5-day plot - Wind Gust Wind Gust (GST): 1.0 kts
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES): 30.15 in
5-day plot - Air Temperature Air Temperature (ATMP): 67.6 °F
5-day plot - Water Temperature Water Temperature (WTMP): 70.9 °F
Sea Bouy: N of Hawaii:
Wave Height (WVHT): 2.6 ft
5-day plot - Dominant Wave Period Dominant Wave Period (DPD): 13 sec
5-day plot - Average Period Average Period (APD): 5.7 sec
5-day plot - Mean Wave Direction Mean Wave Direction (MWD): N ( 353 deg true )
5-day plot - Water Temperature Water Temperature (WTMP): 75.7 °F
Sea State looks good...Cloud cover = 3/10 in area
Look for an attempt about 10:30 EST
I wonder if homeowners insurance covers satalite impact on my house. Or will I have to wait 9-12 months to get a check from the feds. Assuming on the off chance it comes anywhere near Taxachusetts.
The plan is to have it reduced to small enough pieces that will burn up upon de-orbit.
Small pieces left in orbit would constitute a hazard for future navigation. Thus the use of the phrase 'space debris'.
It is makes an orbit every 90 min. News is saying if conditions are right the best time will be around 10pm EST.
hello,... All State? You’re not gonna believe this but I have a unique claim and I want to see if I’m covered...
Don’t worry ... they will supply you with a trailor built with toxic materials instead...its free!
Go USNavy and AEGIS BMD!
Good to hear. ;)
Please let it hit Detroit with a full tank of Hydrazine. Please.
with that kind of service I’m strongly considering becoming a citizen of Mexico and returning to the US. I get all the same benefits but I don’t have to pay a cent in taxes.
will this be on NASA TV?
NASA is heavily involved with the shootdown as well.
They should be. We generally don’t need to monitor this type of event when (most of) our systems are geared towards ground based threats. I’m looking forward to the video of this one.
Is there anyone else on this thread that's a little surprised that one of our interceptor missiles is actually capable of shooting down targets in low Earth orbit? I thought I was fairly well versed on our basic military capabilities and knew we could do this from an aircraft at high altitude but a ship launch is really quite impressive.
Either that or,
10 And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters;
11 And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.
12 And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkened, and the day shone not for a third part of it, and the night likewise.
Just in time for an eclipse!
Anyone know what country is going to get the lucky (?) front rom seat? Just hope it’s not the “splash zone” like the Shamu Show at SeaWorld...
It’s been going on for over 4 year’s that I know of that my has been working on it and testing it.
Thanks, I see that I need to start paying closer attention.
RIM-161 SM-3 (AEGIS Ballistic Missile Defense)
On 14 February 2008 it was announced that the Navy will intercept a malfunctioning US spy satellite sometime after 20 February 2008. President Bush decided to fire a missile to bring down a broken spy satellite because of the potential danger to people from rocket fuel it is carrying. The window for intercepting the satellite would remain open for as many as seven or eight days. The military posted a NOTAM closing airspace about 1000 km West of Maui, indicating that the first intercept attempt might come on 21 February 2008 at about 03:30 UTC [10:30 PM EST on 20 February 2008]. Intercepting the satellite at about 130 nautical miles altitude will reduce the risk of debris in space. Once the satellite is hit, officials hope 50 percent of the debris will come to Earth in the first two orbits and the rest shortly thereafter. Robert Burns of the Associated Press reported 15 February 2008 that the order to launch the program came 04 January 2008. In a matter of weeks, three Navy warships the USS Lake Erie, USS Decatur and USS Russell were outfitted with modified Aegis anti-missile systems and three SM-3 missiles were pulled off an assembly line and given the BMD Kill Vehicle.
Standard Missile-3 (SM-3) is being developed as part of the US Navys sea-based ballistic missile defense system and will provide theater-wide defense against medium and long range ballistic missiles. In 1992, the Terrier LEAP (Lightweight Exo-Atmospheric Projectile) demonstration program culminated in four flight tests and demonstrated the feasibility of theater-wide ballistic missile defense. This program evolved into todays SM-3 development program which is based on the SM-2 Block IV airframe and propulsion stack, but incorporates a Third Stage Rocket Motor, a GPS/INS Guidance Section and the SM-3 Kinetic Warhead.
The United States Navy and the Missile Defense Agency are developing Standard Missile-3 (SM-3) as part of the Aegis Ballistic Missile Defense System that will provide allied forces and U.S. protection from short to intermediate range ballistic missiles. The SM-3 Kinetic Warhead (KW) is designed to intercept an incoming ballistic missile outside the earths atmosphere. SM-3 is under development by Raytheon at its Missile Systems business unit in Tucson, Arizona.
The Aegis BMDS builds upon the Strategic Defense Initiative Organization/Ballistic Missile Defense Organization (SDIO/ BMDO) investment in Lightweight ExoAtmospheric Projectile (LEAP) technology and the Navys Aegis weapon system including Standard Missile and MK41 Vertical Launching System currently deployed on many U.S. Navy and international surface combatants.
The SM-3 KW is a highly modular, compact, space tested kinetic warhead designed to defend against short to intermediate range ballistic missile attacks. Raytheon has engineered two prior generations of LEAP designs starting in 1985 under contracts with SDIO and BMDO. This third generation LEAP design integrates the teamed experience of Raytheon and Boeing in KW designs and Alliant Techsystems expertise in Solid Divert and Attitude Control. The SM-3 KW design features a large aperture wide field of view long wave infrared seeker that provides acquisition ranges greater than 300 km against typical ballistic missile threats. Seeker pointing and intercept guidance are supported by a production IFOG Inertial Measurement Unit and wooden round simplicity of the SDACS propulsion providing over 2 miles of terminal divert capability. The KW includes a fully encrypted data downlink capability for full engineering evaluation of KW performance and to support rapid kill assessment.
The SM-3 evolves from the proven SM-2 Block IV design. SM-3 uses the same booster and dual thrust rocket motor as the Block IV missile for the first and second stages and the same steering control section and midcourse missile guidance for maneuvering in the atmosphere. To support the extended range of an exo-atmospheric intercept, additional missile thrust is provided in a new third stage for the SM-3 missile, containing a dual pulse rocket motor for the early exo-atmospheric phase of flight and a Lightweight Exo-Atmospheric Projectile (LEAP) Kinetic Warhead (KW) for the intercept phase. Upon second stage separation, the first pulse burn of the Third Stage Rocket Motor (TSRM) provides the axial thrust to maintain the missiles trajectory into the exo-atmosphere. Upon entering the exo-atmosphere, the third stage coasts. The TSRMs attitude control system maneuvers the third stage to eject the nosecone, exposing the KWs Infrared (IR) seeker. If the third stage requires a course correction for an intercept, the rocket motor begins the second pulse burn. Upon completion of the second pulse burn, the IR seeker is calibrated and the KW ejects. The KW possesses its own attitude control system and guidance commands are acted upon by a solid divert propulsion system. The IR seeker acquires the target. Tracking information is continuously transmitted to the guidance assembly which controls the divert propulsion system.
Discrimination algorithms enable defense systems to compare objects in a target scene to determine which to intercept. Increasingly complex threats with separated target elements, countermeasures, and debris, require advanced signal processing and discrimination algorithms to identify object features needed to provide robust target selection. SM-3 has flown and demonstrated fundamental discrimination capability for unitary threats.
Computer program design upgrades are in work to expand the current selection accuracy and add capability against more stressing unitary and separating target scenes using target features observed by the Aegis radar system and the KW LWIR seeker to optimize selection confidence. Leveraging off discrimination architecture used across Raytheons missile programs, SM-3 continues to evolve an integrated discrimination design for insertion with the current seeker design and each of the sensing and signal processor upgrades available to counter advancing threats.
Raytheon is working closely with the Navy to ensure that SM-3, based on legacy Standard tactical missile designs, stands ready to provide immediate emergency Aegis BMD capability against preponderant threats. The SM-3 Block I KW configuration features a single color LWIR seeker, a solid DACS propulsion, target identification and discrimination, and lethal intercept accuracy.
According to Heaven’s Above website it flew over the whole US in about 8 minutes!! Went out to see if it was visible here when they said it would be, but it was still a little light here and it was low on the horizon. I couldn’t see anything.
I love the internet...
That sucker is moving fast. The next pass should be it.
I’m guessing AK, or Canada. It will be low.
Yeah, this orbit looks like it takes it right over Hawaii.
Current pass will take it to the east of the Restricted Zone.pass after that brings it over the NW of Hawaii.. Smack dab in the ZONE !!!!
Not sure about it being on Nasa TV. Here is a link to the presser about it today at the Pentagon:
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