General Information

Serial #

10

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

METAL SENSOR CASING/ SYNTHETIC PARTS/ METAL CASE WITH SYNTHETIC PARTS, FOAM PADDING.

Dimensions

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

Length

35.0 cm

Width

24.0 cm

Height

29.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Space Technology

Category

Communications

Sub-Category

N/A

Manufacturer

AKA

Barnes

Country

United States of America

State/Province

Connecticut

City

Stamford

Context

Country

Unknown

State/Province

Unknown

Period

CTS/HERMES PROGRAM WAS INITIATED IN 1971 & SATELLITE OPERATED FROM JAN. 17, 1976 TO NOV. 24, 1979.

Canada

IDENTICAL SPINNING EARTH SENSORS WERE USED ON CTS/HERMES SATELLITE, THE CANADIAN DESIGNED & BUILT SPACECRAFT WHICH EXPLORED USE OF HIGH POWER TRANSPONDERS AT HIGHER FREQUENCIES TO EXPAND COMMUNICATIONS CAPABILITIES IN NORTHERN CANADA.

Function

PART OF ATTITUDE CONTROL SYSTEM USED TO DETERMINE SPIN RATE OF SATEL- LITE DURING TRANSFER ORBIT, WHEN IT WAS STILL ORBITING EARTH. DIGITAL DATA WERETRANSMITTED VIA TELEMETRY TRANSMITTER TO GROUND RECEIVE STATIONS. BASED ON INFO. FROM BOTH SUN & EARTH SENSORS, ENGINEERS FIRED THRUSTERS TO SLOW SPIN RATE & POSITION SATELLITE FOR FIRING APOGEE MOTOR IN ORDER TO PUT SPACECRAFT IN GEOSTATIONARY ORBIT (REF 1)

Technical

EARTH SENSOR IS PART OF COMPLEX ATTITUDE CONTROL SYSTEM COMPRISED OF SEVERAL SENSORS THAT LOOK AT EARTH & TO DETECT ANY CHANGES IN ATTITUDE. SATELLITE'S STABILITY IS CRITICAL IN ALL 3 AXIS BECAUSE ANTENNAS ARE FOCUSED ON SPECIFIC AREAS ON GROUND & SHIFT OF ONE DEGREE COULD MEAN LOSS OF SIGNAL OVER VERY LARGE AREA (1)

Area Notes

Unknown

Details

Markings

PLATE ON SENSOR READING 'SPAR AEROSPACE PRODUCTS LIMITED/ TORONTO ONTARIO CANADA/ CTS-SPINNING EARTH SENSOR/ MFG. NAME BARNES ENGINEERING COM- PANY, STAMFORD, CONN. U.S.A./ MFR. P/N 13-210A SPAR P/N 61043D5-1/ MFR. S/N 010SPAR S/N 010/ DATE OF MFR. 1/2/74 SPAR SPEC. SG.-217'/ PLATE ON CASE READING 'NOMENCLATURE CONTAINER, SHIPPING/ BEC PART NO. 253201-1008-3/ DESIGN ACTIVITY 00430 STOCK NO. None/ MANUFACTURER Zero SERIAL NO. 101/ CONTRACT NO. S/C21665A/ US BARNES ENGINEERING COMPANY STAMFORD, CONN.'/ DECAL ON CASE READING 'GREEN MAPLE/ JOINT CANADA-U.S.A./NASA/ SPACE PROGRAM'/ EMBOSSED '383401-2017- 3' ON SENSOR CASING.

Missing

APPEARS COMPLETE.

Finish

GOLD COLOURED SENSOR CASING WITH YELLOW & RED SYNTHETIC CAPS/ GREY ENAMEL PAINTED CASE WITH BLACK SYNTHETIC, GREY FOAM.

Decoration

SPAR LOGO ON PLATE.