Introduction to Space Sciences and Spacecraft Applications
Bruce A. Campbell
Language: English
Pages: 344
ISBN: 0884154114
Format: PDF / Kindle (mobi) / ePub
This book, based on the SINTEF Offshore Blowout Database, thoroughly examines U.S. Gulf of Mexico and Norwegian and UK North Sea blowouts that occurred from 1980 to 1994. This book reveals the operations that were in progress at the onset of the blowouts and helps you learn from the mistakes of others.
Stardust: The Cosmic Seeds of Life (Astronomers' Universe)
Alien Encounter: A Scientific Novel (2nd Edition) (Science and Fiction)
The Copernican Revolution: Planetary Astronomy in the Development of Western Thought
The Handy Astronomy Answer Book
Lunar and Planetary Webcam User's Guide (Patrick Moore's Practical Astronomy Series)
Moon Lander: How We Developed the Apollo Lunar Module
uses. lmm 106 Introduction to Space Sciences and Spacecrafi Applications given names like VHF and UHF. Through international agreements, certain frequencies have been assigned to particular uses, such as AM broadcast and shortwave. These uses have come about mainly due to the propagation properties of the frequencies and their usefulness in carrying certain types of information. These points will be further explained in the following sections. Figure 5-3 shows how electromagnetic waves of
to the surface of the moon while Mike Collins orbited overhead in the Apollo 11 command module. Between this date and December 1972, five more crews landed on the moon. The twelve astronauts deployed experiments, explored the surface, and returned a total of 378 kgs (836 lbs) of lunar material for study by the international scientific community. The only other mishap occurred on Apollo 13, when an oxygen tank in the service module section of the spacecraft exploded on the way to the moon. The
stations. It was mentioned earlier that analog baseband signals were limited in frequency to about 10% of the carrier wave, and we find that digital signals have similar limits on the number of bits that a carrier wave can transport. We can simply consider a digital baseband signal as a continuous waveform with a period equal to two bit periods, as depicted in Figure 5-11 which shows the first few bits of a NRZ waveform. CI-) f ‘‘cant" = 1/2t b f b “cont” The maximum transmission rate a
receiver. In this case, the range resolution (R,)depends on the pulse length and the signal propagation velocity (c,) which is approxi- Remote Sensing 147 DEPRESSION ANGLE TARGETS A&8 TARGETS C&D Figure 6-5. Active sensor range resolution. Active sensors can improve on resolution in the range direction by controlling the pulse length of the transmitted energy. mately the speed of light for most active sensor frequencies and space-toearth viewing scenarios. The relationship is given in
Navy, Air Force, Marines, Coast Guard). 5. List any other applications you can think of for using systems in space. 6. Repeat Exercise 1 for one of these other applications. 7. Discuss the differences in the approaches taken in space by the United States and the Soviet Union (RussidCommonwealth of Independent States). 8. What do you think the ramifications of other countries (or groups of countries) establishing an independent space capability might be? 9. What, in your opinion, should be the
