It is written by Jonathan McDowell, a Center for Astrophysics | Harvard & Smithsonian astrophysicist.
[1] It is updated as McDowell's schedule permits, but he tries to publish two issues each month.
Originally, the website was hosted on a Harvard University account, but it was moved in late 2003 to a dedicated domain.
McDowell's report occasionally corrects NASA's official web sites, or provides additional data on classified launches that are not available elsewhere.
Associated projects on the JSR web site are: McDowell has long campaigned for U.S. compliance with the UN Convention on Registration of Outer Space Objects (1975) and UN Resolution 1721B (1961).