LINEAR PHASOLVER MEASURING ENGINE

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001800120041-5
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: June 4, 2001
• Sequence Number: 41
• Publication Date: July 26, 1963
• Content Type: REPORT

Approve~or Release 2001/08/13: CIA-RDP78B~1''47A001800120041-5
DECLASS REVIEW by NIMA/DOD
Fridap, July 26, 1963
Linear phasolver Measuring Engine
Contract start date was Monday, July 15, 1963
Phase I demonstration with existing pattern due at
the end of the 10th week, 9/23/63. Phase I will be
completed 10/14/63 according to their present pro-
ect plan.
Phase II which is the preparation of a new pattern
to achieve 1 micron measuring accurae~y and demon-
strating measuring capability,-runs concurrently..
Completion due 6/22/64. First monthly progress
report is due in the mai$ Aug. 10.
They have made a flying start an this Sob, They
found a coupler existing which can be used for the
demonstration. Accuracy of the existing pattern is
unknown and it does have distortion at both ends.
T'he demonstration will however demonstrate the
principle of unambiguous position measurement with-
out oounting pulses. 'The Driver has 128 pole pairs
and the co~:pler will average over 80 pole pairs! so
quite good accuracy can be expected<
For phase II they hive started the design of a new
sine pattern. 'T'hey want to work with a .001 ~ t gap
between the plates and there for want to improve the
crossing angle between the driver and coupler patterns.
~'wh They are also planning to use multiple symmetrical
patterns to reduce sensitivity to skew.
~. important capability which they may ultimately +~
want to take advantage of is the electrical compen-
sation of systematic errors.
D~~LASS REVIEW by NIMA/DOD
~re~d''~or Release 2001/08/13: CIA-RDP78B04747A001800120041-5