'D' RACK - RECOMMENDATION FOR CANCELLATION

Document Type: 
Collection: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP81B00878R001400030093-7
Release Decision: 
RIPPUB
Original Classification: 
S
Document Page Count: 
3
Document Creation Date: 
December 9, 2016
Document Release Date: 
January 27, 2000
Sequence Number: 
93
Case Number: 
Publication Date: 
April 4, 1957
Content Type: 
MF
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PDF icon CIA-RDP81B00878R001400030093-7.pdf269.65 KB
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Approved 2000/0r.irMA-RDP81a00878R001400030093-7 ,! WC 14391 MEI i/ fidWinVIEWER1-06.4510] 0107 or 1957 =MOM Ma Project Director A.Pril TIMM t Contracting Officer 0OBJECT tlet leek - Beaammeaaation for Cancellation 1. The HIr leek was to be *fast resd-out of PM In MOT signal enslysts, this is the first item of modUlatioa data needed for establish- nest of the class or signal. With MT end rough frequency data, * signal eaa vevelly be elassified as anew or a previously identified type as well U the exact type if it is e yrevionely identified type. There is ameed for ',fester readi.out syttom for TOY en& this seed. bas bees greatly in- as a result of the coatinuously operate totem. X, IT mad V. 2. The *VP leek, was to have measured the Unarm% batman two sta- tely (pulses) sted oempared this interval with the next sine intervals with an 'verso value tot* read-out if the interval veristion did not exceed some pre-set value. xr the interval variation WWI beyond this W&Niet vale, the instrumeat would register no result. It was believed 25X1A b sod myself that 10 microaeoond accuracy could be oh- * steels interval end 1 microsecond accuracy might be residua by avenging tea intervals. ). This project hes had low priority at 1=W since the equimeent wee not essential to the read-out process. About five weeks ago, Dr. 25X1Adropped a suggestion that whops the project should be sett!!!!!illieloser look than habeas made for sometime was made an ep, visit to 24 early in Parch. The project was being carried out in the Imstrument Divisioa (the same group that produced the omeOletall umaselble Reck). The englatters were struggling with the job of tompeesating for the variation in recorder speeds. They had also built UP Tether sophistisated counting circuitry for covering the first ten Pelee intervals. 4. The prime question involved in the feasibility of the nr Reek, in my opinion, is the threshold that will be necessary (between *lapel aid noise) to operate the reek. On etheoretioal basis end allowing for no ttempt to he use of the known differences between pulse =orgy die. trihution sad noise energy distribution, one can show that animism or dh. threshold would be needed. Recent Navy work on a almilar prOblea iedittetee that e dh. would be sufficient if a priori kaowledat of puleee was creaked into the equipment. 'Then, too the "D" Reek coneept lacluded the setting up of gates within which the pollees were to fall to further aiSterantiata between pulse endwise. This should further reduce the threshold needed. Only experimental work could stetablieh this thresh- old required. 25X1A IMSLIM 6 PS tt /J1- 15 #64.1 al. 44 Approveg Fs2,6-1Ritsrk3000/6a7 1:113138180478AFIMIIA9342V1A Approved For Release 2000/09/brgIA-RDP81a00878R001400030093-7 - 2- Bseend*ti0fl for CssceUsticn. never been answered to myestisfastian. t wee noted that the gets idea bad not been *spot a levering of a threshold free that no attempt had been solo to make use end noise. These points mere stressed oftineers investigate this petit mad oca- their work foratest tube viewed the reek of Upon inquiry during the weak of 25 Swab, the men? inked it they could wait until the lest of the week for the demonstration. The equiP- meat vas demonstrated on Thursday. No provision existed for opepensating for the recorder speed. The signals is Ise were *leen laboratory pulses produeed with good verve form and with infinity signal to noise ratio (m, noise). Negates nor noise lifferentietioa onset vas is use Tha ovum mated 1 nicely but this demonstrates nothing since e commercial mounter norting $10000, mass the levlitt Paakard and Berkeley would have done ea well. Woe questioning, they said they had me solution for the re - oorder speed problem. They bad tried the rook on live topes but the sig nal to Soles ratio was always tee low to operate their equipment, they reported. Although they had mot measured the neseeeary threshold, they intimated. that 30 db. would be noodled. A theoretical study showed 22 db. would be mammary 'with a 2$ error (20a sec. on a 1000 cycle PRY). They doted if better could be done than 25 db. vs. not 25X1A T. 1 discussed this usesoourailai 4accastrattork with 25X1A Is mad that although they would continue the project if IMES! he thought there was no future in it mad felt that it should be discontinued. Be proposed some methods of trying to acoomplish the requirement. These Judge to have a less likelihood of success then the original approach. They also required considerable time to reed-out the result. I. added that be felt that perhaps 20 db. of threshold would bo required and a lover accuracy then stated above would result. 8. Since a 20 db. threshold would be of very little, if spy, value and his suggestions were mot believed to result is ww, less threshold than the original plan, it is remseaeaded that the project be dropped. It ie believed that the accuracies stated originally can mot be met, but that considerable reduction in threshold might be obtained. With 1111111F 25X1A boring mo faith LA the project (neither the obtaining of a useable thresh- ad nor the correction of tope speed variation), it seem doubtful if Nothing of value can ono from extending the project. cc Approved For Release 2000/09/01 : CIA-RDP81600878R001400030093-7 Approved ForZelease 2000/c)Rip* IA-RDP81.1300878R001400030093-7 MI= "D" - 3 - ReocomenAntion for Cancellation 25X1A 25X1A Distri Copies 2 ?toject Director 25X1A 25X1A 5 SO 7 IMO 8 trejeet Citron 3 - APR 1957 APR 5 1957 X think this is just moth= 7ynrt1371 at the lack of adequate super- vie ton which has been characteristic of much of B-1-1's work. Tho Instru- mentation Division was apparently given this whole job of ground read-out equipsumt without having been advised by Burt of the characteristics desired and vere not kept informed of the discussions that took place from tims to time with respect to details. 25X1A ZUNI' start orri.cer 5X1A Approved For Release 2000/4/01:21A-RDP81600878R001400030093-7