Re: Rumours about a Russian ASAT test creating debris field?

I think the point was that whether it was a KKV or fragmentation warhead it
probably doesn’t make a huge difference. From a physics standpoint, the
satellite is still slamming into something at several km/s and you get a
catastrophic fragmentation.

THe only difference I think it might make is increasing the probability of
a hit by spreading the fragments just before impact, but that’s probably a
trade off with having a system that has a guidance system good enough to
get a direct hit (like we saw with the Chinese, America, and Indian ASAT
tests).

On Tue, Nov 16, 2021 at 12:33 PM Richard Cole via Seesat-l <
seesat-l_at_satobs.org> wrote:

> The system that is being pointed at as being used in the test is the A-235
> Nudol [PL-19]. This is quoted as having a high-explosive warhead so what
> you say is correct. The Buk anti-aircraft missile uses a fragmentation
> warhead mounted behind the radar homing head so a similar warhead concept
> (but probably larger) may be used in the A-235.
>
> The US RIM-161 Standard Missile 3, part of the Aegis system, uses a
> kinetic energy, hit-to-kill, warhead rather than explosives. That doesn't
> mean it leaves no debris, of course.
>
> Regards
>
> Richard
>
> From: Gonzalo Blasco <gblasco_at_gmail.com>
> Sent: 16 November 2021 16:12
> To: marco_at_langbroek.org
> Cc: Richard Cole <richardc_at_recole.plus.com>; satelliet lijst (SeeSat) <
> SeeSat-L_at_satobs.org>
> Subject: Re: Rumours about a Russian ASAT test creating debris field?
>
> I suppose that to destroy a satellite is enough to put in his trajectory
> enough debris. The speed and kinetic energy is in the satellite. If you
> launch vertically and make the thing explode in a cloud of pieces large
> enough, any of them can destroy the satellite.
>
> Perhaps it is counterintuitive but is more like the satellite is the
> bullet and the interceptor a "stone" in the path.
>
> It is the same practice, that some children do in the motorway. The game
> it is to leave in free fall a boulder or stone from a bridge over the road
> with the correct timing to impact in the windshield of a car/bus at 100 or
> 120km/h. The effect usually is destructive and breaks the windshield in
> many cases. In some cases have become in deaths .
>
> I don't know if this "practice " is the same in the actual ASAT systems,
> but the difference is to throw the stone up and not down.
>
> Is this in theory the easiest way to make pieces a satellite?
>
> Sincerely,
>
> Gonzalo
>
> El El mar, 16 de noviembre de 2021 a la(s) 3:11, Marco Langbroek via
> Seesat-l <seesat-l_at_satobs.org<mailto:seesat-l_at_satobs.org>> escribió:
> Op 16-11-2021 om 08:29 schreef Richard Cole:
>
> > I doubt the interceptor achieves orbital velocity (or greater in order
> to catch up). The ASAT interceptor is launched downrange so debris from the
> interceptor will impact away from the launch site. The faster target
> approaches the interceptor from the anti-velocity direction, the
> interceptor has to manoeuvre to 'get in the way', so to speak.
>
>
> Hi Richard,
>
> That makes a lot of sense indeed.
>
> - Marco
>
>
>
> -----
> Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
> e-mail: sattrackcam_at_langbroek.org<mailto:sattrackcam_at_langbroek.org>
>
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Brian
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