CONTENTS ee wore mee ee te eee eee eee FOREWORD -7-7 77 77 TTT e r rss crsececcsccccsrsrs ABSTRACT <-- rrr ttt rr 4 - 6 ctr rnc ee INTRODUCTION -----~------- enter errr tc t 9 mew we ween nee 1.1 Objectives --- ctr r rrr rrr rae soccer tscece 9 woecc~-PREFACE --~ 7 t ttre wrt s testes cere CHAPTER 1 wee 1.2 Background -------<-----7--%57e>- ww ewe ner esses eecnee 8 9 1.9 Theory --- crt rrr rrr ttt rr strc s scr ccrncn 10 OPERATIONS AND INSTRUMENTATION --~---<-------- woos 14 2.1 Detectors -------- Rr tt rn et ren eee rere cence 15 CHAPTER 2 2.1.1 Description ------------- renner reenter e- aero eee ee 18 2.1.2 Calibration ----------2--- -- - ee re err eter tee erence 18 eee 17 2.2 Data Encoder---- -- won enn ne ee ee st 23 te 2.8 Magnetic-Tape Recorder - --~<--------9 7 errr re 2.3.1 Recording Electronics ----------------------- meee n-ne 25 ---- 2220-2 ------2.3.2 Timing Electronics ---------------- 25 2.3.3 Erase Electronics ----------+----+-- 22 - enone see-~ 226 27 +-------+------2.4 Calibration ------------------------------+--27 ---2.4.1 Detector 1 (Cal) ----------~------------- ------------ 27 2.4.2 Detector 2 (Lit) ------------------------ 2.4.3 Detector 3 (Lil) ------------------------------------ 30 ---- 30 n ec ee ee e 30 --- ee ee ee eee 2.5.4 Minus 2 Seconds -------------------- 30 -----------2.4.4 Detector 4 (KBr) -------------------- -------------- 30 2.5 Command and Programming System ------------es rr cr ne ee re rr eee 30 2.5.1 Minus 7 Minutes -----------2.5.2 Minus 2 Minutes ------2------e2.5.3 Minus 10 Seconds----------~---------- 30 ---------------------------------- 30 2.7 Form and Accuracy of Data ------------ 0+ -- terre rrr ern 32 2.5.5 Gamma-Ray Pulse 2.6 ete ee ete eee ree res ene Ground Station ~- -- ~ - << <= #22 oe ere 32 CHAPTER 3 -- 34 RESULTS AND DISCUSSION ~----------------------- CHAPTER 4 CONCLUSIONS AND RECOMMENDATIONS ---------------- 35 4.1 Conclusions -------- te ee ee ee ee eee 35 ------4------4.2 Recommendations -----------------<------ 35 REFERENCES -- - - ----------- 2-2 eee ce rr rrr cree 36 7