Re: China's plan for space junk?

From: Brian Weeden via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 16 Jan 2018 14:22:25 -0500
If you read the original paper, this is a proposal for a relatively low
power laser to remove small pieces of space debris. Newsweek's
characterization of this involving a "giant laser" is definitely not true.

It would not work on a large object because the force you can impart scales
with because the force you're imparting scales inversely with the mass of
the object you're trying to move.

This is a topic of significant study by several research teams around the
world. There's this LightForce proposal put forward by NASA Ames several
years ago for a similar ground-based concept:
https://amostech.com/TechnicalPapers/2012/Orbital_Debris/LEVIT.pdf

That NASA concept is now being developed by a commercial company called EOS
in Australia:
http://www.bbc.com/news/world-australia-29847830

There's also this space-based laser proposal from a bunch of current/former
USG scientists:
https://arxiv.org/abs/1110.3835

The paper also cites several similar laser concepts that have been proposed
in recent years.



---------
Brian


On Tue, Jan 16, 2018 at 1:21 PM, Art Glick via Seesat-l <seesat-l_at_satobs.org
> wrote:

> I call B.S. on the Chinese!  Do they really think we're that stupid
> (fearless leader notwithstanding!)?  This is just a way of trying to
> mitigate criticism about developing space based weaponry.  What supposedly
> "works" on junk would work on an operational bird as well.
>
> And which would you rather have to dodge?  One big piece of easily
> trackable junk or the likely thousands of pieces of still hazardous
> detritus that would be created and possibly pushed into an even higher
> orbit by their laser?
>
>
>
> At 01:00 PM 1/16/2018, Ed Cannon [*] wrote:
>
> "China plans to destroy space junk with
>> giant lasers":
>>
>> http://www.newsweek.com/china-plans-destroy-space-junk-giant
>> -lasers-781276
>>
>> Here's the abstract of the original
>> research article, "Impacts of orbital
>> elements of space-based laser station
>> on small scale space debris removal":
>>
>> http://www.sciencedirect.com/science/article/pii/S0030402617312068
>>
>> Ed Cannon
>> San Antonio, Texas, USA
>>
>
> _______________________________________________
> Seesat-l mailing list
> http://mailman.satobs.org/mailman/listinfo/seesat-l
>
_______________________________________________
Seesat-l mailing list
http://mailman.satobs.org/mailman/listinfo/seesat-l
Received on Tue Jan 16 2018 - 13:23:41 UTC

This archive was generated by hypermail 2.3.0 : Tue Jan 16 2018 - 19:23:41 UTC