BAL-AST (Balloon Astronomy)

In this flight was observed the atmosphere of Venus.

Balloon launched on: 2/21/1964
Launch site: Holloman Air Force Base, Alamogordo, New Mexico, US  
Balloon launched by: Air Force Cambridge Research Laboratories (AFCRL)
Balloon manufacturer/size/composition: Zero Pressure Balloon Schjeldhal - 3.200.000 cuft (0.75 mil. GT-12 Dacron and Mylar scrim)
End of flight (L for landing time, W for last contact, otherwise termination time): 2/21/1964
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 6 h 30 m
Landing site: 25 miles SE of Piñon, New Mexico, US
Payload weight: 2000 lbs

• A quantitative measurement of water vapour in the atmosphere of Venus Annales d'Astrophysique, Vol. 28, p.225
• A quantitative measurement of water vapour in the atmosphere of Venus Astronomical Observations from Space Vehicles, Proceedings from Symposium, 1964 p. 275
• Balloon Telescope Optics Applied Optics Vol. 6, Issue 2, pp. 179-189 (1967)
• Composition of the Clouds of Venus Astrophysical Journal, vol. 140, p.1640
• Guiding of Balloon-Borne Telescopes by Off-set Sun-tracking Applied Optics Vol. 6, Issue 2, pp. 213-219 (1967)
• Infrared Astronomy by Balloon Scientific American, vol. 212, issue 1, pp. 28-37
• Summary of Balloon Flights launched from H.A.F.B. NM (1962 thru 1987) U.S. Gov. National Archives
• The Composition of the Venus Clouds and Implications for Model Atmospheres Journal of Geophysical Research, vol. 70, issue 17, pp. 4401-4402
• The Flight Record Scientific Ballooning Nº 13, March 1964
• Water Vapor in the Atmosphere of Venus Astrophysical Journal, vol. 139, p.1021-1022