a08/a11_vr_bw_o_n (unnumbered, orig. S-67-50589, 1969 reissue by Kollsman Instrument Corp. PR)
“20TH CENTURY SPACE TRAVELERS STILL NAVIGATE BY STARS
Apollo 11 astronaut Michael Collins takes a star sighting through the telescope half of a Kollsman sextant-telescope during navigational training exercise in the Apollo Mission Simulator at NASA’s Manned Spacecraft Center in Houston. The sextant and telescope comprise the Apollo Optical Unit Assembly for the fine angle measurements needed in navigation. Apollo 11 astronauts will use the OUA to insure the accuracy of the guidance and navigation system of their spacecraft during its moon voyage. The angle between the line of sight to the star and base line of the optical assembly is measured and automatically fed to the guidance computer for the necessary course corrections. In most operations, the target star is located first in the telescope, and then the precise angle measurements are made with the sextant. The sextant or telescope also will be used in lunar orbit on the Apollo 11 mission for correcting the orbital path, if necessary, by measuring the angles to lunar landmarks. (NASA Photo).”
a08/a11_vr_bw_o_n (unnumbered, orig. S-67-50589, 1969 reissue by Kollsman Instrument Corp. PR)
“20TH CENTURY SPACE TRAVELERS STILL NAVIGATE BY STARS
Apollo 11 astronaut Michael Collins takes a star sighting through the telescope half of a Kollsman sextant-telescope during navigational training exercise in the Apollo Mission Simulator at NASA’s Manned Spacecraft Center in Houston. The sextant and telescope comprise the Apollo Optical Unit Assembly for the fine angle measurements needed in navigation. Apollo 11 astronauts will use the OUA to insure the accuracy of the guidance and navigation system of their spacecraft during its moon voyage. The angle between the line of sight to the star and base line of the optical assembly is measured and automatically fed to the guidance computer for the necessary course corrections. In most operations, the target star is located first in the telescope, and then the precise angle measurements are made with the sextant. The sextant or telescope also will be used in lunar orbit on the Apollo 11 mission for correcting the orbital path, if necessary, by measuring the angles to lunar landmarks. (NASA Photo).”