General Information

Serial #

153

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL BASE & PROJECTING BARS, SYNTHETIC (FIBREGLASS?) MAST/ SYNTHETIC CARRYING CASE WITH METAL PARTS

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

124.0 cm

Width

39.0 cm

Height

35.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Measurement-position

Sub-Category

N/A

Manufacturer

AKA

Chu

Country

United States of America

State/Province

California

City

El Cajon

Context

Country

Canada

State/Province

Unknown

Period

1970S-1980S

Canada

AMERICAN MADE COMPONENT OF CANADIAN PRODUCED POSITIONING SYSTEM, USED BY GEODETIC SURVEY OF CANADIAN DEPT. OF ENERGY, MINES, & RESOURCES. IT ENABLED SURVEY OF CANADIAN SUBARCTIC WITHOUT USING MANUAL METHODS SUCH AS TRIANGULATION CHAINS. CANADIAN MARCONI WAS ABLE TO PROVE ITSELF CAPABLE OF HIGH-TECH EQUIPMENT PRODUCTION.

Function

USER SEGMENT OF SATELLITE-BASED POSITION LOCATING SYSTEM. ANTENNA PICKED UP SATELLITE SIGNALS & SENT THEM TO RECEIVER-SIGNAL PROCESSOR WHERE DOPPLER SHIFT OF MOVING SATELLITE WAS MEASURED. PAPER TAPE PUNCH PLACED DATA ON TAPE. PAPER TAPE READER INPUT DATA INTO COMPUTER WHICH TRANSLATED IT INTO GEOGRAPHIC POSITION.

Technical

PART OF EARLY SPACE-BASED POSITIONING SYSTEM, USED IN NAVIGATION, SURVEYING, ETC. IT MADE USE OF DOPPLER EFFECT MEASURED BY TRACKING SINGLE SATELLITE, & THUS WAS FAIRLY SLOW. IT WAS SUCCEEDED BY MUCH FASTER & MORE PRECISE GPS SYSTEM BASED ON RADIO SIGNALS FROM SEVERAL NAVSTAR SATELLITES.

Area Notes

Unknown

Details

Markings

PLATES ON ANTENNA READ 'CHU ASSOCIATES INC./ EL CAJON, CALIF./ Model CA3086M Ser. 153/ Freq. 150-400' & 'NNS ANTENNA ASSEMBLY/ CMA-722/ PART NO. 201-471519-000 SER. NO. 102/ WT. 17 LB. MFR. CODE 90073/ CANADIAN MARCONI COMPANY'/ BLACK LETTERING ON CASE EXTERIOR READS 'NNS ANTENNA ASSY/ CMC-201-472269/000/ SER. 102'

Missing

UNKNOWN PARTS MISSING FROM STORAGE COMPARTMENTS IN CASE

Finish

FLAT GREY PAINTED BASE & MAST/ BRUSHED OR WHITE PAINTED BARS/ GREY CASE WITH METALLIC PARTS & BLACK SYNTHETIC HANDLE GRIPS

Decoration

N/A