LASER BEAM DIRECTED AT LUNAR RETRO-REFLECTOR ARRAY - OBSERVATIONS OF FIRST RETURNS

被引：32

作者：

FALLER, J

WINER, I

CARRION, W

JOHNSON, TS

SPADIN, P

ROBINSON, L

WAMPLER, EJ

WIEBER, D

机构：

[1] Wesleyan University, Middletown

[2] Goddard Space Flight Center, Greenbelt

来源：

SCIENCE | 1969年 / 166卷 / 3901期

关键词：

D O I：

10.1126/science.166.3901.99

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

On 1 August between 10:15 and 12:50 Universal Time, with the Lick Observatory 120-inch (304-cm) telescope and a laser operating at 6943 angstroms, return signals from an optical retro-reflector array placed on the moon by the Apollo 11 astronauts were successfully detected. After the return signal was first detected it continued to appear with the expected time delay for the remainder of the night. The observed range is in excellent agreement with the predicted ephemeris. Transmitting between 7 and 8 joules per pulse, we found that each return signal averaged more than one photoelectron. This is in good agreement with calculations of the expected signal strength.

引用

页码：99 / &