Wayne C Taft

US Patent:

39567532, May 11, 1976

Filed:

Feb 20, 1975

Appl. No.:

5/551423

Inventors:

Albert L. Armstrong - Latham NY
Paul E. Bakeman - Elnora NY
Joel Woodhull - Los Angeles CA
Wayne C. Taft - Troy NY
H. Norman Ketola - Stowe VT

Assignee:

RRC International, Inc. - Latham NY

International Classification:

G01D 900

US Classification:

346 34

Abstract:

A data collecting system is provided to produce a record of data relating to sequential occurrences for subsequent and/or remote processing. The system includes clock means for generating a time or service representative signal, at least one means adapted to generate a signal in response to an external random input, and scanning means adapted to sequentially scan the generating means and interconnect the generating means and clock with a recording medium if a random input signal is detected.

US Patent:

58674896, Feb 2, 1999

Filed:

Aug 5, 1996

Appl. No.:

8/691964

Inventors:

John Erik Hershey - Ballston Lake NY
Gary Jude Saulnier - Rexford NY
Stephen Michael Hladik - Albany NY
Richard Charles Gaus - Burnt Hills NY
Wayne Curtis Taft - Scotia NY
Richard August Korkosz - Rotterdam Junction NY
Glen William Brooksby - Glenville NY

Assignee:

Lockheed Martin Corp. - King of Prussia PA

International Classification:

H04J 316

US Classification:

370324

Abstract:

In a time division multiple access spacecraft communication system, each ground station determines when to send its information packets to arrive at the spacecraft at the beginning of a time slot. The calculation is based upon knowledge of the location of the spacecraft. A master ground station determines the location of the spacecraft by the use of the propagation delays between the various ground stations (including itself) and the spacecraft, together with knowledge of the locations of the ground stations. The spacecraft location is then transmitted back to the various ground stations. The determination of propagation delay by each ground station is performed in two major steps. The first step determines coarse time delay to within one bit interval by repeatedly transmitting a multibit unique word to the spacecraft, and counting bits until the next unique word is received from the spacecraft. To determine fine propagation delay, a high-frequency clock signal is counted from the time of transmission of each bit edge until the reception of the next bit edge.