The Timation satellites were conceived, developed, and launched by the United States Naval Research Laboratory in Washington, D.C. beginning in 1964. The concept of Timation was to broadcast an accurate time reference for use as a ranging signal to receivers on the ground.

时形1号（Timation 1）是时形计划的一颗卫星。 海军研究实验室 (NRL) 的海军空间技术中心 (NCST) 于 1964 年构思了时形（时间/导航）计划，于 1967 年发射了时形1号卫星，并于 1969 年发射了 时形2号 卫星。

2021年10月20日 · TIMATION项目的主要目的是探索星基被动式测距技术、世界各国授时中心之间的时间传递方法，以期能够在世界范围内为用户提供全天候、全天时的高精度实时定位服务。 美国海军的TIMATION项目与美国空军的621B项目同时进行，二者形成了竞争关系。 1967年5月31日，NRL发射了TIMATION-1实验卫星；1969年9月30日，NRL发射了TIMATION-2实验卫星。 TIMATION项目的研究成果，也为GPS的成功做出了巨大贡献，主要贡献包括：

1967~1974年， 美国海军研究实验室 发射三颗“Timation”计划试验卫星，试验并实现了 原子钟 授时系统。同期美国空军在“621-B”计划中成功研发了伪随机 噪声码（pseudo random noise code,PRN)调制信号的现代通信手段。

2012年6月18日 · TIMATION was a pioneering navigation test program of NCST (Naval Center for Space Technology) at NLR (Naval Research Laboratory) in Washington D. C., which started in the 1960s (a predecessor program of the follow-up GPS program).

2023年5月31日 · A vision of NRL research physicist, Roger Easton, TIMATION, short for ‘time navigation,’ introduced continuous navigation fixes from satellites in low Earth orbit (LEO). In the TIMATION system,...

2014年5月8日 · TIMATION is an acronym of TIMe navigATION, proposed by the U.S. Naval Research Laboratory (NRL). Timation was developed by Roger Easton for the Naval Air Systems Command. The current Global Positioning System (GPS) is based on the Timation system, and their principles of operation are fundamentally identical.

2023年9月28日 · The Naval Research Laboratory's (NRL's) Naval Center for Space Technology (NCST) conceived the Timation (Time / Navigation) program in 1964 and launched the Timation 1 satellite in 1967 and the Timation 2 satellite in 1969. Timation proved that a system using a passive ranging technique, combined with selected high-performance crystal ...

TIMATION proved that a system using a passive ranging technique, combined with highly accurate clocks, could provide the basis for a new and revolutionary navigation system with three-dimensional coverage (longitude, latitude, and altitude) throughout the world.

TIMATION proved that a system using a passive ranging technique, combined with highly accurate clocks, could provide the basis for a new and revolutionary navigation system with...