ABM/Missile Defense Discussion

The Military Issues & History Forum is a venue to discuss issues relating to the military aspects of the Indian Armed Forces, whether the past, present or future. We request members to kindly stay within the mandate of this forum and keep their exchanges of views, on a civilised level, however vehemently any disagreement may be felt. All feedback regarding forum usage may be sent to the moderators using the Feedback Form or by clicking the Report Post Icon in any objectionable post for proper action. Please note that the views expressed by the Members and Moderators on these discussion boards are that of the individuals only and do not reflect the official policy or view of the Bharat-Rakshak.com Website. Copyright Violation is strictly prohibited and may result in revocation of your posting rights - please read the FAQ for full details. Users must also abide by the Forum Guidelines at all times.
Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Postby Singha » 23 Dec 2007 18:30

finally, my vision of huge Pave Paws type monoliths housing ATBM radars that can track football sized warheads from thousands of kilometers, sited on green rolling hassanish meadows or misty western/eastern hills is going to come true.

imagine the superb psyops photos that will generate ...black monoliths lit by white lamps against the darkening sky....kinda like astro observatory type
photos on mt palomar etc. or even better the areciabo radio telescope

http://www1.istockphoto.com/file_thumbv ... vatory.jpg

JCage
BRFite
Posts: 1562
Joined: 09 Oct 2000 11:31

Postby JCage » 23 Dec 2007 19:35

http://www.youtube.com/watch?v=ripHZ58J ... re=related

The S-400 claimed capable of intercepting targets at upto 4.8 Km/s. But wonder whether those PESA radars have sufficient range against low RCS targets to provide the necessary time. And whether the missiles now have active seekers or still the good old TVM.

Austin
BRF Oldie
Posts: 23385
Joined: 23 Jul 2000 11:31

Postby Austin » 23 Dec 2007 21:23

JC as of now the S-400 still lacks the BIG Missile 40N6 with a range of 400 Km , Thats suppose to get operational only in 2008.

Currently they have three missile 9M86 and 9M86-2 which have active seeker and range of 40 & 120 Km , There is the 48N6D missile which is an upgraded missile from S-300 system has a range of 200Km and uses TVM for guidance.

The 40N6 missile which is capable of intercepting missile corresponding to a range of 3500 Km will use combination of TVM + Active Seeker for guidance , but thats yet to be developed and is still in testing phase and same goes for the Long Range Tracking and Guidance radar for the 40N6

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Postby Singha » 23 Dec 2007 21:47

I think Arrow-2 is better than S-400 and it works today. if we are um getting a few ideas and stuff from that pgm , our footing is good.

Austin
BRF Oldie
Posts: 23385
Joined: 23 Jul 2000 11:31

Postby Austin » 23 Dec 2007 22:39

Singha wrote:I think Arrow-2 is better than S-400 and it works today. if we are um getting a few ideas and stuff from that pgm , our footing is good.


Arrow-2 is an operational system , But S-400 is a THAAD class system.

NRao
BRF Oldie
Posts: 16507
Joined: 01 Jan 1970 05:30
Location: Illini Nation

Postby NRao » 23 Dec 2007 23:48

Two items of interest WRT Arrow: 1) It gets substantial support from a supporter two ponds across, and 2) Arrow is custom designed.

The second point is what is of interest to India. Enough of these off-the-shelf stuff. With enough in the Indian piggy bank this expectation can be met. The high cost is worth it in the longer run.

Philip
BRF Oldie
Posts: 20420
Joined: 01 Jan 1970 05:30
Location: India

Postby Philip » 26 Dec 2007 13:06

BMD Watch: Japan makes BMD breakthrough
http://www.upi.com/International_Securi ... ough/4458/

Published: Dec. 24, 2007 at 9:26 AM
Print story Email to a friend Font size:By MARTIN SIEFF
UPI Senior News Analyst
WASHINGTON, Dec. 24 (UPI) -- Japan's ballistic-missile defense program took a giant leap forward last week with its first successful interception of a ballistic missile with a U.S.-built Standard Missile-3 off Kauai Island, Hawaii.

The SM-3 was launched from the Japanese Maritime Self-Defense Force's Aegis destroyer Kongo, the MSDF said last week.

The test indicates Japan already has the capability to intercept and destroy in flight North Korean ballistic missiles such as the Rodong, or even the Taepodong-1, that Pyongyang could fire at its densely populated cities, experts told the Daily Yomiuri last Wednesday.

The Daily Yomiuri reported details of the test. It said tests began at 12:05 p.m. Monday when a real ballistic missile with a fake warhead was fired from the U.S. Navy's Pacific Missile Range Facility on Kauai.

The Kongo picked up the target missile right after its take-off and responded rapidly, firing an SM-3 Block IA standard missile four minutes later. The SM-3 struck the target missile and eliminated it in an exoatmospheric interception more than 60 miles above sea level three minutes after the Kongo launched it, the newspaper said.

Although the test was a success, it was the first for Japanese BMD forces; the Aegis-SM-3 systems are now a relatively mature and very reliable technology. The paper noted that U.S. forces have now racked up 11 successful interceptions in 13 tests.

The target missile was a multistage one that was designed to have the flight characteristics of a North Korean Rodong intermediate-range ballistic missile with a range of just under 800 miles, the paper said.

IRBMs fly far more slowly than intercontinental ballistic missiles and therefore are technically much easier to intercept. SM-3s cannot destroy ICBMs in flight once they have accelerated to high speeds. But the SM-3 missiles do have the capability to intercept and destroy old Scud-type missiles, which do not jettison their early stages and therefore remain lower and larger targets. The Daily Yomiuri said the Rodong could fly at speeds of Mach 10, or 10 times the speed of sound. That is about half the velocity of an ICBM.

The newspaper said the successful test was personally watched Japanese Vice Defense Minister Akinori Eto, who was on the Kongo. It said the SM-3s' interception and destruction of the target missile were recorded on an infrared camera.

"The success of this experiment is symbolic of close security relationship between Japan and the United States," Eto said, according to the report.

Lt. Gen. Henry "Trey" Obering III, director of the U.S. Missile Defense Agency, welcomed the Japanese test and said it reflected and would further strengthen the U.S.-Japanese partnership.

Japan's drive to develop effective ballistic missile defenses goes back to the alarm caused by North Korea's August 1998 firing of a Taepodong-1 intermediate-range ballistic missile over the Japanese islands into the Pacific.


Russia ready to put MIRVs on Topol-Ms

Russia said last Wednesday its renewed investment in intercontinental ballistic missile modernization and upgrades was bearing fruit.

Former defense minister and current First Deputy Prime Minister Sergei Ivanov, who enjoyed great success under President Vladimir Putin in rebuilding the obsolescent equipment of the Russian armed forces and in boosting maintenance and operational reliability of the Strategic Missile Forces, said the Kremlin was almost ready to operationally deploy a new multiple-warhead missile system equipped with Topol-M multiple independently targetable re-entry vehicles.

According to a report carried by RIA Novosti Wednesday, Ivanov said the Topol-M, the backbone of the Strategic Missile Forces, is used in both mobile and fixed-site deployments.

The otherwise reliable and long-range Topol's weakness is that previously, it could not carry MIRV warheads the way other systems could. But Ivanov said the long-awaited MIRV version was on the way.

"I very much hope that it will appear in its MIRV modification in the very near future," he said.

RIA Novosti quoted a Strategic Missile Forces spokesman as saying last Monday that Russia would deploy 48 fixed-site Topol-Ms -- NATO designation SS-27 -- by the beginning of January. He said that over the next two or three years, all of those ICBMs would be upgraded with MIRV warheads.

Russian missile force commanders believe that the new MIRV-equipped Topols would be more than a match for any ballistic missile defenses that the United States and its allies might develop and deploy.

RIA Novosti said that in December 2006 the SMF had 44 silo-based and three mobile Topol-M missile systems deployed.

Philip
BRF Oldie
Posts: 20420
Joined: 01 Jan 1970 05:30
Location: India

Postby Philip » 27 Dec 2007 11:32

Russia selling Iran S-300s.Also posted in the Iran thread.

Time's "Man of the Year",Vladimir Putin is wasting no time to the US intransigence in ereecting a missile defence shield in Eastern Europe,using the fig leaf of the threat from Iranian missiles.The US spurned Russia's offer of using CIS territory for the same purpose, being more effective.In response,Pres.Putin is increasing defence supplies to iran so that it can protect itself from any rogue attacks by the US or its allies,chiefly Israel.Though US intelligence has downgraded the nuclear bomb threat from Iran,no one can totally rule out a "rogue" attack in the dying days of theBush administration,as the neo-cons led by Bush and Cheney might make one final gesture to delight their constitituency of fundamentailist "Christians".

A must read for every BR memebr is the book,by Craig Unger "Fall of the House of Bush",how Bush lost the War.It is a devastating indcitment upon Dubya and his team of neo-con fanatics,who destroyed almost everything that his father built up during GW1.Here is a brief synopsis of the contents of the book.

"Vanity Fair contributing editor Craig Unger has just published a new book entitled The Fall of the House of Bush: The Untold Story of How a Band of True Believers Seized the Executive Branch, Started the Iraq War, and Still Imperils America’s Future (Scribner; $27.00). In some respects the work continues Unger’s keen focus on the Bush clan’s ties and dealings with the Middle East found in his prior book House of Bush, House of Saud, but The Fall introduces some fascinating new research on the role that Neoconservatives played in Bush 43’s rise and his presidency, the role of the Christian Right and the curious dealings between Neocons and Religious Right figures. But the core of the book is an intimate account of the struggle that the key foreign policy advisors of Bush 41 waged to set his son’s administration back on a more “realistâ€

shyamd
BRF Oldie
Posts: 6823
Joined: 08 Aug 2006 18:43

Postby shyamd » 19 Jan 2008 02:33

More States Step Up Anti-Missile Work
[quote]India also claimed a recent successful missile defense test. India’s Defense Research and Development Organization (DRDO) reported Dec. 6 that a single-stage missile “interceptedâ€

JCage
BRFite
Posts: 1562
Joined: 09 Oct 2000 11:31

Postby JCage » 19 Jan 2008 02:40

[quote="shyamd"]More States Step Up Anti-Missile Work
[quote]India also claimed a recent successful missile defense test. India’s Defense Research and Development Organization (DRDO) reported Dec. 6 that a single-stage missile “interceptedâ€

JCage
BRFite
Posts: 1562
Joined: 09 Oct 2000 11:31

Postby JCage » 19 Jan 2008 02:59

Join Date: May 2003
Location: US
Posts: 22

http://www.frontlineonnet.com/storie...4242512300.htm

[quote]THERE was applause at first, followed by five minutes of silence as missile technologists of the Defence Research and Development Organisation (DRDO) scanned the consoles in front of them. After 25 seconds of tension, a deafening applause broke out in the Mission Control Centre (MCC) on Wheeler Island, 17 kilometres from Dhamra on the Orissa coast. The atmosphere turned electric as the young men and women missile technologists went delirious with joy. Full-throated cries of “DRDO zindabadâ€

ramana
Forum Moderator
Posts: 53971
Joined: 01 Jan 1970 05:30

Postby ramana » 19 Jan 2008 03:15

Tells you how much expertise is there and yet they get quoted!

Multatuli
BRFite
Posts: 612
Joined: 06 Feb 2007 06:29
Location: The Netherlands

Postby Multatuli » 03 Feb 2008 08:26

Here is a promotional video from the ´Almaz-Antey Concern´. It gives an idea of how the different systems involved in air defense work together.

It´s almost 10 minutes in duration and titled ´War on Iran´.

http://www.youtube.com/watch?v=WvxR933r ... re=related

Added later : It shows how some Iranian Jingo thinks how Iran will repel an American air attack. Someone is in for a very nasty surprise.

Vick
BRFite
Posts: 753
Joined: 14 Oct 1999 11:31

Postby Vick » 07 Feb 2008 07:30

Huh?

India said mulling missile-shield work with U.S.

This seems more like a marketing trial balloon than anything else.

Austin
BRF Oldie
Posts: 23385
Joined: 23 Jul 2000 11:31

Postby Austin » 07 Feb 2008 07:36

Vick wrote:Huh?

India said mulling missile-shield work with U.S.

This seems more like a marketing trial balloon than anything else.


Thats the first of the many steps that America will take to scuttle/delay our own ABM program , frankly speaking we dont need them.

Vick
BRFite
Posts: 753
Joined: 14 Oct 1999 11:31

Postby Vick » 07 Feb 2008 07:49

I'm thinking more on the lines of Aegis. I think LM will be trying to hit many birds with one stone. Aegis+LCS+BMD might be the sales pitch LM might be giving.

Austin
BRF Oldie
Posts: 23385
Joined: 23 Jul 2000 11:31

Postby Austin » 07 Feb 2008 07:57

Well as i said we simply don't need any of LM ABM system , They can give their sales pitch in Paki land , they badly need such system.

Sanjay M
BRF Oldie
Posts: 4892
Joined: 02 Nov 2005 14:57

Postby Sanjay M » 02 Jun 2008 09:59


enqyoobOLD
BRFite
Posts: 690
Joined: 09 Sep 2004 05:16
Location: KhemKaran, Shomali Plain

Anti-Satellite Weapons

Postby enqyoobOLD » 11 Jun 2008 07:41

In memory of the postor who committed Fedayeen / Harakiri demanding that this topic NEVER be discussed on BRF:

India wakes up to plan for busting Chinese satellites

Pioneer News Service | New Delhi

Realising the need to protect its satellites and space assets in the wake of China acquiring the capability to shoot down satellites through missiles, the Government on Tuesday announced the formation of an Integrated Space Cell.

Unveiling India's steps to meet the new challenge and project the country as a power to reckon with in the arena of space-based defensive and offensive capabilities, Defence Minister AK Antony said the cell would work under the aegis of the Integrated Defence Services Headquarters to counter "the growing threat to our space assets".

Refraining from naming China or any other country to blast out satellites in space, Antony told the two-day unified commanders' conference of the Integrated Defence Staff (IDS), "Though we want to utilise space for peaceful purposes and remain committed to our policy of non-weaponisation of space, offensive counter space systems like anti-satellite weaponry, new classes of heavy-lift and small boosters and an improved array of military space systems have emerged in our neighbourhood."

He said the cell would act as a single window for integration among armed forces, the Department of Space and the Indian Space Research Organisation (ISRO). Incidentally, the ISRO recently launched an array of satellites, including military-specific units, and was scheduled to launch some more sophisticated satellites in the near future.

The Integrated Space Cell, sources said, would act as a precursor to the proposed Aerospace Command comprising the three services. On the anvil for the last four or five years, the Government recently asked the three armed forces to jointly come up with a detailed plan.

The Aerospace Command would protect the assets in space through network-centric weapon systems, advanced sensors capable of tracking down missiles and take evasive action and in some cases adopt offensive posture, they said. The Integrated Space Cell would do the groundwork by conceptualising the defensive systems for space assets, resources needed for extensive array of weapons and other devices and platforms to deliver the systems, they said.

Meanwhile, Antony gave the go-ahead for setting up of a defence informatics centre on the lines of the National Informatics Centre. It will cater to the e-governance needs of the Armed Forces, the Defence Ministry and other associated organisations.

He also announced the establishment of a Defence Information Technology Consultative Committee (DITCC), comprising eminent personalities from the Defence Ministry, the three Services, the Ministry of Communications and IT, academia and the industry. "DITCC has evolved a roadmap and a common approach for the integration of information technology in our Armed Forces," he added.

The two-day conference is focusing on various issues pertaining to ongoing process of jointness among the three Services, higher defence management and a conceptual way forward. Chairman Chiefs of Staff Committee and Chief of Naval Staff Admiral Sureesh Mehta, Chief of Air Staff Air Chief Marshal FH Major, Chief of Army Staff General Deepak Kapoor, Defence Secretary Vijay Singh, Chief of Integrated Service Command Lt Gen HS Lidder, commanders and senior officers from the Service Headquarters and the Defence Ministry attended the meeting.

Venkarl
BRFite
Posts: 932
Joined: 27 Mar 2008 02:50
Location: India
Contact:

Re:

Postby Venkarl » 11 Jun 2008 08:50

Sanjay M wrote:http://www.gizmag.com/airborne-laser-completes-activation-tests/9401/


youtube embed didn't work?? any restrictions on new users??

http://www.youtube.com/watch?v=6w-ql8msl0U

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: ABM/Missile Defense Discussion

Postby Singha » 11 Jun 2008 08:56

on AFM naval subforum there is a 14mb download of a dual salvo SM3 hitting a SRBM at a height of 26000ft.
towards the end , an airborne platform took B&W video of the SM3 rising above the cloud and hitting its
target. embedded readout gives the altitude.
the second SM3 arriving a second later seems to hit a fragment of the destroyed SRBM.

ramana
Forum Moderator
Posts: 53971
Joined: 01 Jan 1970 05:30

Re: ABM/Missile Defense Discussion

Postby ramana » 11 Jun 2008 20:18

Link:

Israeli Tamir test planned

Gives good details of the challenges in intercepting short range missile attacks.

soutikghosh
BRFite
Posts: 178
Joined: 17 Feb 2008 11:21
Location: new delhi
Contact:

Re: ABM/Missile Defense Discussion

Postby soutikghosh » 12 Jun 2008 23:43

Singha wrote:on AFM naval subforum there is a 14mb download of a dual salvo SM3 hitting a SRBM at a height of 26000ft.
towards the end , an airborne platform took B&W video of the SM3 rising above the cloud and hitting its
target. embedded readout gives the altitude.
the second SM3 arriving a second later seems to hit a fragment of the destroyed SRBM.


Any link of the download.

nayar
BRFite -Trainee
Posts: 12
Joined: 12 Jan 2008 03:33

Re: ABM/Missile Defense Discussion

Postby nayar » 13 Jun 2008 00:20

is there ny news on when we will be testing AAD and PAD together ?? i heard its supposed to be done by the middle of this year.

Rahul M
Forum Moderator
Posts: 16879
Joined: 17 Aug 2005 21:09
Location: Skies over BRFATA
Contact:

Re: ABM/Missile Defense Discussion

Postby Rahul M » 13 Jun 2008 03:20

Any link of the download.


why don't you yourself check keypub forum ??

spoon feeding is not good for health !!

Venkarl
BRFite
Posts: 932
Joined: 27 Mar 2008 02:50
Location: India
Contact:

Re: ABM/Missile Defense Discussion

Postby Venkarl » 13 Jun 2008 09:44

soutikghosh wrote:
Any link of the download.

http://www.youtube.com/watch?v=XM6Qu1wCky0

not sure

vipins
BRFite
Posts: 447
Joined: 12 Jun 2008 17:46

Re: ABM/Missile Defense Discussion

Postby vipins » 15 Jun 2008 15:59


Arunkumar
BRFite
Posts: 643
Joined: 05 Apr 2008 17:29

Re: ABM/Missile Defense Discussion

Postby Arunkumar » 15 Jun 2008 16:43

Boeings tests solid state laser achieving power levels of 25KW.
This is still short of the megawatt level achieved
by chemical laser and employed in the air borne laser using B747
against tactical missiles. Being solid state it would be less maintainence intensive than a chemical laser. A step closer to developing a laser based tactical weapon.

http://www.boeing.com/news/releases/200 ... 3a_nr.html

Nitesh
BRFite
Posts: 899
Joined: 23 Mar 2008 22:22
Location: Bangalore
Contact:

Re: ABM/Missile Defense Discussion

Postby Nitesh » 15 Jun 2008 16:55

with this improvised version of 'Aakash' missile system, India will possess an anti-missile system that has the capacity to destroy any nuclear attack.


Isn't AAD and PAD are separate program not the Akash

The two thousand crore project will be put through a crucial test after two successful trials by September 2008. This much needed missile shield will be ready soon, but everything will have to work out well as it should be perfect enough to conduct its operations in seconds.


Best of luck to DRDO.

enqyoobOLD
BRFite
Posts: 690
Joined: 09 Sep 2004 05:16
Location: KhemKaran, Shomali Plain

Re: ABM/Missile Defense Discussion

Postby enqyoobOLD » 17 Jun 2008 06:58

I have been searching high and low, mostly low, for this "FOURTH GEN WEAPONS" thread in BRF that is supposed to be giving away hi-tech info stolen from all kinds of secret places. Is this it, pls? I read here that the Japanese warship King King-O fired a mijjile and hit something
60 miles above sea level three minutes after the King-Kong-O launched it, the newspaper said.
. It also took 4 minutes for the Kongo to fire following the launch of the target. Interesting data.

Wonder what would have happened if the target was followed by 3 more.

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: ABM/Missile Defense Discussion

Postby Singha » 17 Jun 2008 19:13

http://www.telegraphindia.com/1080617/j ... 422637.jsp

Star wars drill in the works
- Earth station to keep satellites out of line of missile fire
SUJAN DUTTA

New Delhi, June 16: Indian space scientists are setting up an earth station to keep a lookout for missiles fired at Indian satellites and take them out of the line of fire, a senior Indian Space Research Organisation (Isro) officer said here today.

The disclosure — effectively meaning that India is evolving its version of a star wars programme — came alongside a call by the army chief, General Deepak Kapur, to set up a joint military space command.

General Kapur prefaced his call with remarks on the expansion of China’s military-space projects.

China shot down one of its old weather satellites with a missile in a test on January 11 last year, becoming the third country after the US and Russia to demonstrate the capability and sparking concerns over the weaponisation of space.

The response to the Chinese ASAT (anti-satellite missile) was being prepared, Geeta Varadan, the programme director for special projects at Isro, said at a meeting on Indian military applications in space.

“The first is a geo-stationary satellite that we are trying to put up (to keep a lookout for probable missiles) and we are also setting up a ground station to monitor any object coming close to our satellites so that we can move our satellites out of harm’s way,” she said.


“There should not be a threat,” she added, “because our space programme is entirely peaceful but we have to be prepared.”

Since its inception, Isro has launched 50 satellites. Its more advanced satellites, like the Cartosat I and the recently launched Cartosat 2A, also have military applications with superior imagery technology.

Varadan said the Cartosat 2A can give sub-metre resolution (.8 metre) for pictures and was meant for cartographic purposes.


But the military would also like to use the satellite for surveillance. Varadan said Isro hoped to launch a satellite in five years that can send even sharper — at .3 metre resolution — imagery.


Kapur himself praised the quality of images that have been received so far from the Cartosat 2A. He said: “The establishment of a tri-service space command for persistent surveillance and rapid response is required in the future.” The army had taken up an initiative by creating a space cell at its headquarters.

Kapur noted that “(the) Chinese space programme is expanding at an exponentially rapid pace in both offensive and defensive content”.

He said the army, the navy and the air force had to jointly develop institutions that will eventually lead to the creation of a space command.

“The Indian Army’s agenda for exploitation of space will have to evolve dynamically. It should be our endeavour to optimise space applications for military purposes,” the army chief said.

Last week, defence minister A.K. Antony announced the creation of a space cell in the headquarters of the Integrated Defence Staff (IDS).

IDS chief Lt General Hardev Lidder, who was also at today’s meeting, said weaponisation of space was inevitable.

“We may get sucked into the inevitable military race of space-based applications in warfare and protection of space assets,” he said.

vipins
BRFite
Posts: 447
Joined: 12 Jun 2008 17:46

Re: ABM/Missile Defense Discussion

Postby vipins » 17 Jun 2008 19:57

first is a geo-stationary satellite that we are trying to put up (to keep a lookout for probable missiles)


can a single satellite do this job??
and if many satellites are assigned for this job than whole system can be used for tracking missiles in very early phase of launch...plz if someone can shed some light here..

ranganathan
BRFite
Posts: 277
Joined: 06 Feb 2008 23:14

Re: ABM/Missile Defense Discussion

Postby ranganathan » 17 Jun 2008 20:23

It will need an array of SATs in thre geostationary orbit. As the resolution improves area of coverage will decrease (span).

shyamd
BRF Oldie
Posts: 6823
Joined: 08 Aug 2006 18:43

Re: ABM/Missile Defense Discussion

Postby shyamd » 17 Jun 2008 21:27

As Arunji said a long time back, more CARTOSATs will be seen in the near future.

vipins
BRFite
Posts: 447
Joined: 12 Jun 2008 17:46

Re: ABM/Missile Defense Discussion

Postby vipins » 17 Jun 2008 21:46

more CARTOSATs will be seen in the near future


or may be some new series of geo-sats as here d report says a geo-sat whereas cartosat are sun synchronous

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: ABM/Missile Defense Discussion

Postby Singha » 17 Jun 2008 21:57

can sats be geostationary on any orbital plane or just the equator ? ideally we need them placed
over PRC which is well north of the equator.
if thats not possible then a army of polar orbit sats will be needed on several parallel tracks
covering prc.

satyarthi
BRFite
Posts: 179
Joined: 21 Aug 2006 08:50

Re: ABM/Missile Defense Discussion

Postby satyarthi » 18 Jun 2008 01:07

Singha wrote:can sats be geostationary on any orbital plane or just the equator ? ideally we need them placed
over PRC which is well north of the equator.
if thats not possible then a army of polar orbit sats will be needed on several parallel tracks
covering prc.

There is only one geostationary orbit, which is above the equator at a height of 35786 km from earth's surface. Earth's radius is 6378 km.

Since the geostationary orbit is at 6.6 earth radii away from the center of the earth, we can assume it to be very far away and obtain a rough estimate: the effective resolution drops by a factor of cos(latitude). So looking at Beijing at about 40 deg latitude, will cause effective resolution drop by a factor of 0.77 as compared to a point on equator. (It is also rather straightforward to calculate the actual drop in resolution, without making any assumptions).

So, it may still be alright to look at china from geostationary orbit. Only for low orbits it becomes necessary to be almost right above the location of interest.

NRao
BRF Oldie
Posts: 16507
Joined: 01 Jan 1970 05:30
Location: Illini Nation

Re: ABM/Missile Defense Discussion

Postby NRao » 18 Jun 2008 01:46

“The first is a geo-stationary satellite that we are trying to put up (to keep a lookout for probable missiles) and we are also setting up a ground station to monitor any object coming close to our satellites so that we can move our satellites out of harm’s way,” she said.


Since the path of two sats is very predictable, I find thins thinking to be too passive. If an "object coming close to our satellites: is actually a Chinese "object", it could be concluded with near 100% certainty that it is by design!!!!!!! The Chinese should have enough sense to track and maintain a distance of their own sats, else they need to pony up for the losses+. And, expect retaliation in kind.

p_saggu
BRFite
Posts: 1058
Joined: 26 Nov 2004 20:03

Re: ABM/Missile Defense Discussion

Postby p_saggu » 18 Nov 2008 23:07

Possible S-300 SAM site. One can also see numerous SA-3 systems

Sorry no locations to be given.
Image

SaiK
BRF Oldie
Posts: 36402
Joined: 29 Oct 2003 12:31
Location: NowHere

Re: ABM/Missile Defense Discussion

Postby SaiK » 21 Nov 2008 03:23

Image
Japanese Aegis-equipped destroyer Chokai fires an interceptor missile to shoot down the target in space, off the coast of the Hawaiian island of Kauai, on Wednesday. The Japanese navy ship failed to shoot down a mid-range ballistic missile target in a test. AP


Return to “Military Issues & History Forum”

Who is online

Users browsing this forum: brar_w, ManuJ, Rakesh and 50 guests