Analytical Graphics

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Analytical Graphics, Inc.
Type Private
Industry Computer software
Founded U.S. (1989)
Founder(s) Paul Graziani
Scott Reynolds
Jim Poland
Headquarters Exton, Pennsylvania, United States
Key people Paul Graziani

Scott Reynolds
(Chief Software Architect)
Joseph Sheehan
Products Systems Tool Kit (STK)

Analytical Graphics, Inc. (AGI) is a software development company focused on spaceflight and national security, headquartered in Exton, Pennsylvania.[1] It was founded in 1989 by Jim Poland, Scott Reynolds and current CEO Paul Graziani.[2]

AGI's Systems Tool Kit (STK, formerly Satellite Tool Kit) is in common usage among satellite, aircraft and radar operators and installations.


The Center for Space Standards & Innovation (CSSI) is a division of AGI focused on astrodynamic research. CSSI operates the satellite tracking web site CelesTrak, which includes Satellite Orbital Conjunction Reports Assessing Threatening Encounters in Space (SOCRATES), a twice-daily analysis of the probability of satellite collisions based on publicly available data.[3] Interestingly, SOCRATES did not list the 2009 satellite collision as likely, and expected the two satellites to miss by 584 meters.[4]

Other activities[edit]

AGI has supported the NORAD Tracks Santa program's internet presence from its start in 1997. From 1998 to the present, the NORAD Tracks Santa Website of and the domain name of have been registered to Analytical Graphics, Inc.[5][6][7][8]

Analytical Graphics' STK software is certified by the Space Foundation as a Certified Space Technology™.[9]