SECOR

SECOR spacecraft are satellites used by the United States armed forces for geodesy measurements that precisely determined the locations of points on the Earth's surface. Experiments with these spacecraft led to the Timation and GPS Navstar systems.[1]

Launch history

SECOR 1 was launched on 11 January 1964 and SECOR 13 on 14 April 1969.[1][2] SECOR was an abbreviation for "Sequential Collation of Range".[3]


References

  1. ↑ 1.0 1.1 "SECOR 1 - NSSDC ID: 1964-001C". NASA NSSDC.
  2. ↑ "SECOR 13 - NSSDC ID: 1969-037B". NASA NSSDC.
  3. ↑ "SECOR (Sequential Collation of Range)". Internet Encyclopedia of Science.