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COMOR-D-69/39 

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11 August 1965 

NRO (BYE-36727-65) 

MEMORANDUM FOR: Chairman, Committee on Overhead Reconnaissance 

SUBJECT: Satellite SIGINT Launching Schedule 

REFERENCE: COMOR-M-325- (Para 20) 

The following SIGINT payloads constitute the current NRO inventory: 

OPPORKNOCKITY This payload is the service test model used for 

ore-flight testing of Mission 7215 (flown in Aug 1964) to provide 

coverage in the 66 to 72mc s band. This payload is not in usable 

condition and has been made obsolete by the much-improved payload to be 

flown as 

PLYMOUTH ROCK - There are two PLYMOUTH ROCK payloads. The 

first is a service test model from providing general search in 

the 1000-2650mcs band. This payload requires approximately three to four 

months rework to place in a flyable condition. The second is also a service 

test model from Mission 7208, an aft rack payload, providing general search 

for 2000-4000mcs. This payload is now obsolete and could not economically 

be configured for flight, 

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COMOR has been briefed on 

Mission 7225 (SQUARE 20) designed to deterthine the feasibility of 

detecting and recording transmissions in the 1550- 

1750mcs band is planned for launch in October 1965. The NRO is in the 

process of preparing a briefing on this mission similar to that given on 

1111111.in response to your COMOR-D-69/34. The other two approved 

missions, 7223 (NEW HAMPSHIRE) and ti are tentatively 

being considered for launch in the Spring of 1966. These payloads are 

in an early developmental stage and are insufficiently defined to permit 

our provision of the details requested in COM:OR-D-69/34. COMOR 

has been briefed in detail on the concept. 

This is the 

only NRO-approved payload that has not been formally reported to 

COMDR. This mission is undergoing redefinition. You will be advised 

as soon as this redefinition has been accomplished. 

IMMINMEMIIIN (POPPY) - ®11®111 similar in concept 

After to The design concept provides for more emphasis on 

EOB, payload refinements, and coverage of 100-14, 800mcs. Additional 

information will be made available as developed. 

In summary, altall.111.11111111IM which is being 

held in reserve, is the only SIGINT payload that could be considered as 

available. The SWG has been briefed to the extent that system development permits on all approved missions except Mission 7225 and the 

briefing for that mission will be accomplished as soon as possible. 

The launching plans for individual missions have been provided where 

it was possible to do so. Launch plans will be provided for the balance of 

the missions as soon as feasible. 

/S/ 

JAMES T. STEWART 

Brigadier General, USAF 

Director, NRO Staff 

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