By Sunny Tsiao, United States. Nasa History Division

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Additional resources for Read You Loud and Clear: The Story of NASA's Spaceflight Tracking and Data Network

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19 Thus, convinced from the beginning that his team must look else­ where for a solution, Rosen asked John T. Mengel and his NRL Tracking and Guidance Branch to develop an electronic system for use in conjunction with an optical one. For ballistic missile guidance, Mengel had led the develop­ ment of the mentioned Azusa system at White Sands. 6 kilograms (30 pounds), far too large for a small satellite. 37-kilogram (13-ounce) transmitter using a differ­ ent operating frequency and antenna pattern.

However, things were not Introduction xxxix so clear-cut when it came to the “manned” side of the house. Here, both Goddard and Houston’s Manned Spacecraft Center (MSC) had a stake. Despite the fact that there was not always full agreement even within Goddard’s own top management (who thought the center should be devoted to scientific exploration of space and questioned whether it should be in the business of tracking human missions), Headquarters in due time delegated Goddard with the full responsibility for running the MSFN.

Auto Retro-Jettison is off; Emergency Retro- Jettison Fuse switch, off; Retro-Jettison Fuse switch, off. UHF/DF to normal. Flight path looks good; steering is good. Roger. Understand everything looks good; g’s starting to build again a little bit. Roger. Friendship Seven. Bermuda has you. Roger. Bermuda standby . . This is Friendship Seven. Fuel 103-101, oxygen 78-100. All voltages above 25, amps 26. Roger. Still reading you loud and clear. Flight path is very good. Pitch -3. Roger . . My pitch checks a -7 on your -3.

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