Using Satellites in the Classroom: A Guide for Science Educators.
The function, design, and ground statics ceguirements of the AMSAT-OSCAR ncn-ccmmercial space satellite system are described, and various experiments designed for direct student participation in space communications are provided in this text primarily written for the science educator. Six chapters include:) (1) an introduction to general satellite crtit problems and sclutione, (2) a number of tracking methods_ for ccmputing the positicns of 1 satellites, (3) onboard systems common to most satellites, (4) ai complete descripticn of each of the satellites currently in orbit or planned for the near future, (5) specifics fcr ground stations, and (6) four complete student satellite experiments, 15 detailed prcject outlines, and 19 suggestions for topics and activities. AppendiCes include listings of equipment manufactirers and publishers, as well as a glossary of terms. .(Author/RAO) #31g4g###########*31g#714########*###*######****************7144**714*71444714### * Reproductions supplied by EDRS are the ,best that car be made * * from the original document. * *********************************************************************** U.S. DEPARTMENT OF HEALTH. EDUCATION & WELFARE NATIONAL INSTITUTE OF EDUCATION THIS DOCUMENT HAS BEEN REPRO'. DUCED EXACTLY AS RECEIVED FROM THE PERSON OR ORGANIZATION. ORIGIN''ATING IT POINTS OF VIEW OF. JPINIOkS STATED-4:X) NOT NECESSARi'.Y REPRESENT OFFICIAL NATIONAL I,1 iTITUTE OF EDUCATION POSITION OR PGL:CY USING SATELLITES IN THE CLASSROOM: A GUIDE FOR SCIENCE EDUCATORS Martin R. Davidoff, Ph.D. "PERMISSION TO REPRODUCE THIS MATERIAL HAS BEEN GRANTED BY
Improvements in search and rescue distress alerting and locating using satellites
This paper describes a system concept for search and rescue which is capable of making a major contribution to saving lives and reducing the search time for downed aircraft. In addition, a beacon location experiment is described using the Amateur Radio Satellite Corporation Oscar-6 and Oscar-7 spacecraft. The purpose of this experiment was to demonstrate the system concept above by determining the geographical location of a low power 'distress beacon' via satellite based on a single pass of Doppler frequency measurements. Preliminary results are presented showing beacon location recovery on the order of 10 km with indications that an order of magnitude improvement is entirely possible. This experiment is in support of NASA's current exploration into the role satellites might play in providing much needed improvements in the reliability, coverage and accuracy of present search and rescue procedures.
Popov and the Beginnings of Radiotelegraphy
Popov's rôle in the development of radiotelegraphy is evaluated in relation to the contributions of other pioneers, notably Lodge and Marconi. The official Soviet position on the matter is critically reviewed.