General Information

Serial #

102

Part Number

1

Total Parts

1

AKA

GPS

Patents

N/A

General Description

METAL CHASSIS & FRONT & BACK PANELS, WORKING PARTS/ SYNTHETIC CONTROLS, METER CASINGS, WORKING PARTS/ SYNTHETIC SHIPPING 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

67.0 cm

Width

56.0 cm

Height

27.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Marine Transportation

Category

Navigation instruments & equipment

Sub-Category

N/A

Manufacturer

AKA

Marconi

Country

Canada

State/Province

Québec

City

Montréal

Context

Country

Canada

State/Province

Unknown

Period

1970S-1980S

Canada

CANADIAN MADE & DISTRIBUTED POSITIONING EQUIPMENT, 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. ASSOCIATED ANTENNA SENT SATELLITE SIGNALS TO THIS UNIT WHERE DOPPLER SHIFT OF MOVING SATELLITE WAS MEASURED OVER TIME. PAPER TAPE PUNCH PLACED DATA ON TAPE. PAPER TAPE READER INPUT DATA INTO MINICOMPUTER WHICH TRANSLATED IT INTO GEOGRAPHIC POSITION.

Technical

EARLY SPACE-BASED POSITION LOCATING 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

PLATE ON CONTROL PANEL FRONT READS 'NNS RECEIVER/SIGNAL PROCESSOR/ CMA-722/ PART NO. 245-471518-000 SER.NO. 102/ WT. 54 LB. MFR CODE 90073/ CANADIAN MARCONI COMPANY'/ LABEL ON BACK READS 'EMR INVENTORY CONTROL EMR CONTROLE DES STOCKS/R.C./C.R. 633 015811/ EQ CODE D'EQUIPE 5825-21-889-0173'/ BLACK LETTERING ON FRONT & BACK PANELS FOR CONTROL FUNCTIONS ETC./ LABEL ON FRONT READS IN ENGLISH & FRENCH 'If found return to/ GEODETIC SURVEY/ SURVEYS & MAPPING BRANCH/ 615 BOOTH ST./ OTTAWA, ONT.'/ BLACK LETTERING ON EXTERIOR READS 'NNS RECEIVER/SIGNAL PROCESSOR/ P/N 245-472372-000/ SER. 102 MFR. 90073'

Missing

APPEARS COMPLETE

Finish

GREY ENAMEL PAINTED FRONT & BACK PANELS/ WHITE & BLACK SYNTHETIC CONTROLS/ PLATED SWITCHES & METALLIC PARTS/ COLOURLESS TRANSPARENT METER CASINGS/ GREY CASE WITH METALLIC PARTS & BLACK SYNTHETIC HANDLE GRIPS

Decoration

N/A