Rain Generating and Hail Preventing Rockets

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" ' " ' " '" . , DEPARTMENT OF THE ARMY.,. ,'I' UNfTfD STATES .uMY lNTfWGfN( AHO SlQJRJ'TY COMMANDe, ,- ', ' -. FIUEOOM Of INfOltMATlONNRIVACY OfF.::: f,:: ' . ..: . fORT GEORGE G. MEADE, MARYLAND 2015$-:5"5

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R I ! ~ I . . Y TO AT,. " TI O" OF :

Freedom of InfonnationlPrivacy Office

SEP 232009Mr. John Greenwald, Jr.

Dear Mr . Greenwald:

This is in further response to your Freedom ofInformation Act (FOIA) request of July 27, 2009 andsupplements our letter of July 31, 2009.

The search with another element of this command has been completed and a record responsive to yourrequest was located and returned to this office for final disposition and direct reply to you. The record ispartially releasable and is enclosed.Information has been sanitized from the record as the release of the information would result in an

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records under the FOIA. You have the right to appeal this decision to the Secretary of the Anny. If youwish to file an appeal, you should forward it to this office. Your appeal must be postmarked DO later than60 calendar days from the date of this letter. After the 6O-day period, the case may be considered closed;however, such closure does not preclude you from filing litigation in the courts.Please note: This document is an unedited English language translation of a foreign language documentprepared for official U.S . Government use, that the document may be protected by copyright and that its use

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Enclosure


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NGICHT043697DATEr f'ebru."ry 10 , 1 H8

'l'RANSI..A'l'ION OF : flengkong Z!l1sh1 {l iero.sp.r:. Kno'- 'hdgej . 19915 (Augl. Nn.a(lOS" ;n oLANGUAGE I Ct:inQao. COtm'TRY: Pe:)p l . ' $ ltepublic of Ch bill .

COON'l'RY or ORIGIN: People'lS. Rep:"'t>li


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NEW CBAPTR'R IN PAIN GENBRATIlIG AND ANTI-HAIL ROCXETSBY: Jun Wei

On May 26 of th i s year there was oS windstorm a t LiuC}uan Dis tr ic t in Danfenq County of Shaanxi Province with piu9 pong bal l size haiL, aad which lasted for two hours. A to ta l of 21 towns and 2,208 households were affected . There ware 2,780 Mou 01 wheat and vegetables damaged, with 10,se15 of more than 1.3 mill ion Yuan,. Also, according the SBAANXI DAILY - , in addition to the historical drought in Hey.ng County, ainca l . a t winter there i s basical ly no effbCtive moisture in the 80i1 to a depth of 50 millimoters, and a large area of wheat fields has dried up bocause it haG not been pos8ible to i r r iga te . Paced with such a ser ious condi t ion, the local government issued a E I O b i l i ~ a t i o n order to r county - wido mobilization, everyone working to save the c r ops. They a180 II'queezed out L 85 million Yuan to be uBed to f ight the drought. This led the author to think that i t we could uee .space science to affect the weather, i t would be possible to quickly take countermeasures against hail and rain, reducing di&asters and increa .ing production. We should also be able to eave a great deal a t power and material and financial resource8. The -highly e ffective, multipl e-ue. rain increas ing, hail prevention rocket system (called th e WR-1B Rocket- developed by the 41 Ins t i tu te of the Pourth Space Academy i s a new generation tool for man-made effect8 on nature. Thill' rocket passed t echnical evaluation for production by the State Weather Bureau and t h ~ Space Industries Corporation, attaining internationel levels for a domestic product. I t wa. exported to Ea.tern Europe in April of this year. OVer the past few years, with gradual widcepread uaa ot th is product , i s has played an incteasinq role in ar t i f ic ia l ly affecting n"o;turo. On 28 August, 1995 , clouds appeared over a large area a tPing l iang in Gansu Province. All of the weather stat ions in thePing liang Distr ic t took immediate actien to turn on a l l the weatherdetection systems and maintained a close watch on th e movements ofthese clouds. The WR-IB r ocket launcher trucKs, which were a l readyon stand- by , closely followed the olouds . The operator. waited forthe opportunity, aimed a t the clouds, and pre ss ed the launchbuttone. In an instatlt there were several ":rire t ra i l s" in.,ide theclouds ti'prllying f i re and mist, with the entire operation las t ingless than ten minuteSt and there followed heavy rains over thePingliang di at r ic t . The th irsty ground opened up and drank in th iswonderful rain. According to an analysis of the s ta t i s t ics , theserockets increased the amount of rain which fe l l by 10,132,000 cubic~ e t c r B of water, an increase of 36 . 4 percent, tor a harvoot lu

i n v e . t ~ e n t ration of 51 to ooe. The WR-IB rocket r e41ly did i t se l tproud.1

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How dees this type of rocket make i t rain? . ThIs rocket U8es the BR-91-Y high p e r f o ~ 5 n c e pyrotechnic c ~ t a l y s t recently developed by the China Meteorological Inyt i tu te . When th is cata lys t i& launched in to th e atmosphere it forms a r t i f i c i a l aeroso l crystals with an ice core. FUrthermore, there is a very high rate of core t o r r r ~ t When ice containing clouds form in t h ~ atmosphere which have not yet developed to the degree where rain fa l ls natural ly, if the rocket . .pray th is pyrotechnic ca ta lys t into t.he warm zone in the middle an d lower par t of th4:'i clouds, the catalyst will produce large numbers of crystal cores which will absorb the super cooled water droplqts in the clouds to form ice cores , and theae wi l l continue to grow l a rge r ""hile they are Rlovin.g Mout ins ide the claude. When the ice droplets: exceed a cer ta in S i ~ 8 , they wil l f a l l a& rain or wi l l turn a small amouet of ra in in to a II'IAjor ra infa l l . When there are hai l elouds, an even greater amount of th is catalY8t must be sprayed to form even more a r t i f i c i a l c r ys t a l cores 60 competes with the natural ice cores to absorb the super cooled ~ a t e r . This t o ~ a large number of small ice nuclei of the same s ize within the cloud which f a l l s aB ra in , thus serving to protect agAinst hai l .

Compared with the current Ant i -a i rc ra f t gun exp los ive type broadcasting method, th is type of rocket has a longer operational range, a 1 0 1 l l ~ e r horizontal broadcast dis tance, 4nd hos a higher r a te o t catalys t core torv.ation, so rain fa l l a aver a greater area an d the r a in fa l l d is t r ibu t ion i. more even. The s t ructure of t h i s rain generation an t i - ha i l r ocket eyaten ia very simple, it ie oafe and r ~ l i . ! ! b l e , i s easy to operellto and easy to mainta in . It can form an in tegrated man, rocket , launcher and vehicle mobile opera t ions un i t . I t can quickly and f lexib ly t rack tal low cloud., over a f a i r ly wide range ( r adiu . of 20 0 kilorr.aten, which f ac i l i t a te s launch a t the proc ise proper moment . These advantagee make it are effCilctivf! in increasing r a in fa l l and protect ing against hai l . This system is algo quite economical. I

Chin", ie an agr ic u l tu ra l country with a VAst area and manyd i f fe ren t t ypes of climate, with complex an d changing climatepatterns. There is are tremendous differences in tbe regional / l I n ~ seasonal distribution of natural rainfa l l , with an average amountof fresh ....ater per poraon of only one fourth tha t of the worldaverlllge . T b e r ~ are constantly such natural dieasters as floods,droughts, hail and b l i ~ z a r d s The average annual losses to auchdisas ter amount to severa l ten a of bi l l ions of Yuan. Because thed e v e l o p m e ~ t of surface and underground water resources i . l imi tedby natural condit io ns, it ia absolu te ly necessary to di rec t lyoxploi t th e cloud water resourc es in the a t m o ~ p h e r This i s thebeat and Dost economical 1:Isthod of reducing disas ter s and producinga bURper harvest .

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The r.ain increasing an d hai l prevent ing rocket operat iol lal. y 5 t e m ~ has been used in field rain increo.sin9 and hai l preventingt es t s since early in 1995 in Oezhou Dis t r i c t in Shandong, inShijiazhuang Distric t in Bebei, in Yanji Distr ic t in J i l in , in TheXinjiang Ulger A u t o n o ~ U 8 Region and in Lantian County in Shanxi,achieving satisfactory results in a l l of these tes ts . Fo r example,in ar t i f ic ia l rain increasing operations in Iao County of ShaanxiProvince las t Mar, aa to t . I of eight rockets vere launched wi t h amarked increase the 4l!lount of r a in fa l l . An .analysis indicatedthat these ar t i f ic ia l rainfal l incroAsing operations were able toi ncrease th e wheat production by ten cat t iea pBr Mou, and with20,000 JIlOU of wheat in the effect ive rainfal.l area, it was able toincrease to ta l production by 200,000 cat t ies , which equates to180,000 Yuan.China haa over one thousand counties in i t s 30 provinces ,autonomous regions and cHntrally governed I ci t ies which arebeginning rain increasing, hail prevanting operationa. It the 'i'RlB rocket operations system were to be u ~ e d nation wide replaceth e currently used ~ 3 7 ant i -a i rcraf t gun", i t wou l d be possible toincrease an area 5.2 times as large and with operational e u l t ~ which are three to five times bet ter with no increase in the actualinvestment.the WR-IB rocket project wall named by the State Planning

C O ~ S S i O D as a ~ n a t i o n a l key point enterprise technologydevelopment item- and a "national key point development item forconver&;ion froru lnilitary to civi l ian technology- . I e 1995 thnState Planning Commission named it as a Mnational k ~ y new productand was approved by the State Science Commie.ion as a Mnationallevel torch plan itEm-. In May of this .year th is project wasprai.ed by experts a t the rain increasing operation. operationacceptance evaluation c o n f e r e ~ c e convened of the Qinghai, xi tangand xinjiang Offices tor Art i f ic ial ly Affecting Weather andMeteorologicaIOrgano . . . . .

We can imagine that with uniform deployment by the stateMythological Bureau and the Offices for Artif icial ly AffectingWeather, th e WR- IB rain increasing, hail preventing rocket will beable to play an even greater role .

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Rain Generating and Hail Preventing Rockets