Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1969
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969saosr.298.....g&link_type=abstract
SAO Special Report #298 (1969)
Astronomy and Astrophysics
Astrophysics
Scientific paper
(1) Apollo 7 Retrofire and Reentry of Service Propulsion Module, by M. Grandfield, D. Hanlon, K. Hebb, E. Jentsch, and R. Yorke. The retrofire of the Apollo 7 manned spacecraft was photographed by the Smithsonian Astrophysical Observatory (SAO) Baker Nunn camera at Maui, Hawaii. Shortly thereafter, the service propulsion module was photographed by the SAO Baker-Nunn camera in Arizona and visually observed by serveral Moonwatch teams as it entered the earth's atmosphere. This report presents the data from these observations and a preliminary analysis of the retrofire photographs. (2) Further Study of Intelsat II F-2 Apogee Burn, by M. R. Wolf. The Intelsat II F-2 communications satellite was placed in a synchronous earth orbit on January 14, 1967. This was accomplished by firing its 3000-lb-thrust apogee motor for 16 sec at the seventh apogee after launch. Three Baker-Nunn satellite-tracking cameras recorded the event simultaneously. From these films, the position during firing, probable ignition time, cloud brightness, and total magnitude are calculated. The possibility of photographing such events at even greater distances is discussed.
Grandfield M.
Hanlon D.
Hebb K.
Jentsch E.
Wolf M. R.
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