==Launch history== SECOR 1 was launched on 11 January 1964 and SECOR 13 on 14 April 1969. SECOR was an abbreviation for `Sequential Collation of Range`. ... Found on http://en.wikipedia.org/wiki/SECOR
(Sequential Collation of Range) Small United States Army geodetic satellites launched in the 1960s to determine the precise location of points on the Earth`s surface (notably islands in the Pacific). Each SECOR satellite was linked to four ground stations – three at g... Found on http://www.daviddarling.info/encyclopedia/S/SECOR.html