sur07_v_bw_o_n (68-H-50)
“Laser beams aimed toward the landing site of Surveyor VII are shown as they were monitored Jan. 20, 1968, by the television camera aboard the NASA spacecraft and relayed back to Earth. The originating points of the laser beams, at Kitt Peak National Observatory in Tucson, Arizona (right); and Table Mountain Observatory at Wrightwood, Cal., (left); are indicated by the arrow on the dark side of the Earth. The Earth as seen from the Moon by Surveyor VII appears as a crescent, with the illuminated portion to the right. The laser beams directed from Earth to the Moon were photographed by the National Aeronautics and Space Administration’s Surveyor VII’s camera and the picture transmitted back to Earth.”
The image & excellent Surveyor 7 reading, at:
www.drewexmachina.com/2018/01/07/surveyor-7-the-mission-t...
Credit: Andrew LePage/Drew ExMachina website
Also, the following excerpt from "SP-168: Exploring Space With A Camera":
Surveyor VII, launched on January 7, 1968, at 06:30 GMT, successfully landed on the Moon on the Tycho ejecta blanket on January 10, 1968, at 01:05 GMT. The coordinates of the landing site were 40.89° S. latitude and 11.44° W. longitude. From that position, it transmitted 21,274 television pictures during the first lunar-day operations. Its camera system also spotted laser beams aimed toward it from two observatories on Earth.
The Surveyor photograph of the partially sunlit Earth, is described by C. O. ALLEY, of the University of Maryland: "Surveyor VII's TV camera detected as star-like images two narrow laser beams sent to the Moon from, respectively, the Kitt Peak National Observatory, near Tucson, Ariz., and the Table Mountain Observatory, near Los Angeles.
"The blue-green argon-ion laser beams seen...on the photograph each contained only about 1 watt of power," Alley explained, "but appeared somewhat brighter than the brightest star, Sirius.
"This engineering test of the aiming of the beams, a few miles wide at the Surveyor site, was conceived and coordinated by me and my fellow-professor D. G. Currie, of the University of Maryland's Department of Physics and Astronomy, to gain experience for the Apollo laser-ranging retroreflector experiment, for which I am principal investigator "
At:
sur07_v_bw_o_n (68-H-50)
“Laser beams aimed toward the landing site of Surveyor VII are shown as they were monitored Jan. 20, 1968, by the television camera aboard the NASA spacecraft and relayed back to Earth. The originating points of the laser beams, at Kitt Peak National Observatory in Tucson, Arizona (right); and Table Mountain Observatory at Wrightwood, Cal., (left); are indicated by the arrow on the dark side of the Earth. The Earth as seen from the Moon by Surveyor VII appears as a crescent, with the illuminated portion to the right. The laser beams directed from Earth to the Moon were photographed by the National Aeronautics and Space Administration’s Surveyor VII’s camera and the picture transmitted back to Earth.”
The image & excellent Surveyor 7 reading, at:
www.drewexmachina.com/2018/01/07/surveyor-7-the-mission-t...
Credit: Andrew LePage/Drew ExMachina website
Also, the following excerpt from "SP-168: Exploring Space With A Camera":
Surveyor VII, launched on January 7, 1968, at 06:30 GMT, successfully landed on the Moon on the Tycho ejecta blanket on January 10, 1968, at 01:05 GMT. The coordinates of the landing site were 40.89° S. latitude and 11.44° W. longitude. From that position, it transmitted 21,274 television pictures during the first lunar-day operations. Its camera system also spotted laser beams aimed toward it from two observatories on Earth.
The Surveyor photograph of the partially sunlit Earth, is described by C. O. ALLEY, of the University of Maryland: "Surveyor VII's TV camera detected as star-like images two narrow laser beams sent to the Moon from, respectively, the Kitt Peak National Observatory, near Tucson, Ariz., and the Table Mountain Observatory, near Los Angeles.
"The blue-green argon-ion laser beams seen...on the photograph each contained only about 1 watt of power," Alley explained, "but appeared somewhat brighter than the brightest star, Sirius.
"This engineering test of the aiming of the beams, a few miles wide at the Surveyor site, was conceived and coordinated by me and my fellow-professor D. G. Currie, of the University of Maryland's Department of Physics and Astronomy, to gain experience for the Apollo laser-ranging retroreflector experiment, for which I am principal investigator "
At: