LETTER(Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001500070001-9
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: June 28, 2005
• Sequence Number: 1
• Publication Date: October 24, 1963
• Content Type: LETTER

Approved For Release 2005/07/13 CIA-RDP78B04770A001500070001-9
0
STAT
Box 2143
Main Post Office
Washington, D. C.
As we discussed recently, I would certainly appreciate you
assistance in helping me to arrange an informal presentation
of our precision shaft encoding device, the Phasolver.
The Phasolver has been successfully applied to both satellite
and ground support systems such as star tracker positioning
on the OAO Satellite, antenna position information on the 'Hay-
stack" Radio Telescope, antenna position information on the
N.E.L. "TETRAC" Antenna, and angular readout for phototheof"ilite
equipment.
One of the most important features of the Phasolver approach to
high accuracy encoding is the mechanical simplicity of the
transducer. It consists of one disc mounted on the stationary
element and one disc mounted on the rotating element. All
leads are attached to the stationary element and we require no
brushes, no light source, no mechanical devices of as kind
other than the discs themselves. Thus, you can see that the
Phasolver offers a method of obtaining absolute accuracies of
angular readout to 19 bits of digital information which places
this device among the leaders in the state-of-the-art. Develop-
ment of a system for precision readout of linear position is
currently underway. The enclosed information will give you further
general background on this system.
If possible, we would like to arrange for presentations to
interested people in your organization during the week of 23
October 1963. At this time, our schedule is open for appointments
Monday through Wednesday. The presentation planned is largely
NGA Review Complete
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24 October i 63
Page (2)
technical and consists of an informal slide presentation aTd
appropriate explanatory technical information will be distributed.
Our experience is that this presentation :lasts approximately one
hour, including time for questions.
I would appreciate any assistance that you can give us in arrang-
ing meetings and will plan to give you a telephone call later
this week to discuss this matter further.
With best personal regards.
Sincerely yours,
MCT/ceb
Approved For Release 2005/07/13 : CIA-RDP78B04770A001500070001-9