Satellite Systems Timing Formats 1961

Satellite Systems

First Edition

Lockheed Aircraft Corporation. Satellite Systems Timing Formats. Report No. LMSD 918768. Sunnyvale, CA: Lockheed Missiles and Space Division, 19 June 1961. First edition. Approximately 20 pages. Comb-bound in original two-tone green printed covers with graphic icons representing clocks, timing pulses, and telemetry. Internal pages mimeographed or offset-printed with detailed binary diagrams, timing tables, and correction notices. Includes an errata page stapled to title page.

An internally circulated technical manual from the early years of Cold War aerospace innovation, this 1961 Lockheed Missiles and Space Division report outlines the timing code formats used by various satellite systems at a critical juncture in American space and reconnaissance development. Compiled by Lockheed engineers at the company’s Sunnyvale, California facility—epicenter of classified space-based military systems including CORONA spy satellites—the document sought to resolve the absence of a unified standard across multiple U.S. satellite platforms. “This report is to acquaint users with the timing formats in use by Satellite Systems,” the foreword explains. “The details of each time code word... are compiled from their respective Technical Manuals and Handbooks. Code word titles as shown in this report have originated from lack of an available standard.” The manual includes precise descriptions of timing word construction for satellite telemetry: “The illustration below shows the BCD time code word as it is received in the timing accumulator… Each group represents a decimal digit.” The document further notes that bits were encoded in a non-return-to-zero format and generated “at a 50 bit-per-second rate.” Time was broken into discrete segments using “6 ms Early Frame Pulses” and binary-coded decimal groupings for hours, minutes, and seconds. Applications included magnetic tape recording, oscillograph output, and “film and real time transmissions” for both “manual and automatic data reduction.” One supplemental sheet dated July 1961, signed by systems integration manager George Priff, lists technical corrections, such as “Figure 1 is shown inverted, the code word consists of negative pulses.”

Issued just as Project Mercury was placing the first Americans into orbit and at the dawn of global reconnaissance satellite use, this document reflects the hidden architecture of U.S. space operations—how data, time, and telemetry were synchronized across a rapidly expanding satellite infrastructure. Created in the same year as the launch of Transit 4A (the first nuclear-powered satellite) and the continued development of Lockheed’s Agena spacecraft, this report offers key insight into the programming, data acquisition, and timing challenges that defined early aerospace telemetry systems. Comb binding intact with minor creasing to plastic spine; covers show modest wear and faint markings to upper right; internally clean and complete. Overall very good condition.

Item #22431

Price: $385.00