20:
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three of the explosives were fired successfully, the pitch sensor went off scale. A range wire for one grenade has been suggested as the cause of the failure, producing a downward force after grenade launch. Normal real-time event data were not received during flight. It was then decided not to fire the fourth explosive. Nineteen of the
Thumper charges were successfully fired.
139:
the mortar, none of the four explosives were fired. There was an attempt to fire them at the end of the ALSEP's operational lifetime, but the charges failed to work after being dormant for so long. Due to loss of uplink capability with Apollo 14 central station on March 5, 1975, the experiment could no longer be commanded and the grenades remain unfired.
138:
The mortar, geophones, and thumper were stored on the first subpackage. Thirteen of the twenty-two thumper charges were fired successfully. The thumper misfired 5 of 18 times. The problem was attributed to dirt on the firing switch actuator bearing surface. Because of concerns about the deployment of
155:
The new mortar base used to improve the experiment after problems were encountered with Apollo 14's. The mortar, geophones, and thumper were stored on the first subpackage. The base of the mortar box was stored on the second subpackage. Three grenades were fired, up to a distance of 900 m. After
116:. Grenades containing 45â450 grams (1.6â15.9 oz) of hexanitrostilbene were used with the mortar. This explosive was chosen due to its insensitivity but high explosive properties.
98:
one of 22 charges to create a small shock. The components weighed 11.2 kilograms (25 lb), drew 9.75 watts of power and recorded data at an average rate of 10,000 bits/sec.
427:
55:
705:
365:"Timing problem with the Lunar Module impact data as recorded by the LPSE and corrected near-surface structure at the Apollo 17 site"
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43:
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The Active
Seismic Experiments along with the Lunar Seismic Profiling experiment enabled researchers to derive a
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668:
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of the lunar surface varies in depth, the characteristics revealed were similar at the three landing sites.
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567:
330:
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varying distances away from the ALSEP. Ranging of the grenade was achieved through the assumption of ideal
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profile of the lunar subsurface at the landing sites of Apollo 14, Apollo 16 and Apollo 17. Whilst the
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from the
Central Station to detect the explosions. A mortar package was designed to lob a set of four
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493:
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319:. Houston, Texas: NASA Scientific and Technical Information Office. 1979. pp. Chp4âPg7.
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8:
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224:
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19:
820:
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376:
209:
257:
Apollo 14 and 16 Active
Seismic Experiments and Apollo 17 Lunar Seismic Profiling
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47:
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436:
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of 108 m/s and 114 m/s were inferred for the lunar subsurface at the Apollo 14
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16:
Geophysical experiment carried out at the Moon surface by Apollo missions
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402:, The Leading Edge, Society of Exploration Geophysicists, April, 2009.
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263:. Stanford: Department of Geophysics. Stanford University. 1976.
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The ASE consisted of three major components. A set of three
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94:. Finally, an astronaut-activated "Thumper" was used to
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290:
267:
54:charges to explore subsurface lunar structure and
192:material, likely the result of fragmentation and
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588:Primary guidance, navigation, and control system
184:site respectively. These velocities suggested
706:Charged Particle Lunar Environment Experiment
421:
435:
70:by the Lunar Seismic Profiling experiment.
428:
414:
398:Brzostowski, M.A., and Brzostowski, A.C.,
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46:(ALSEP). ASE used a thumper device and a
686:Apollo Lunar Surface Experiments Package
400:Archiving the Apollo active seismic data
362:
331:"Apollo 16 Experiments - Active Seismic"
146:
129:
44:Apollo Lunar Surface Experiments Package
18:
353:Brzostowski and Brzostowski, pp 414-416
296:Brzostowski and Brzostowski, pp 414-416
273:Brzostowski and Brzostowski, pp 414-416
114:Apollo Lunar Active Experiments Package
882:
711:Lunar Ejecta and Meteorites Experiment
409:
758:Suprathermal Ion Detector Experiment
701:Apollo 14 Passive Seismic Experiment
696:Apollo 12 Passive Seismic Experiment
306:
304:
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281:
279:
250:
248:
246:
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151:Apollo 16 Active Seismic Experiment.
134:Apollo 14 Active Seismic Experiment.
104:was the main explosive fill in the
13:
728:Lunar Seismic Profiling Experiment
716:Solar Wind Spectrometer Experiment
66:. The experiment was succeeded on
14:
916:
681:Solar Wind Composition Experiment
299:
276:
241:
871:Category:Apollo program hardware
866:
865:
499:Launch Vehicle Digital Computer
392:
369:Journal of Geophysical Research
789:Lunar Landing Research Vehicle
669:Lunar Laser Ranging experiment
639:Thermal Micrometeoroid Garment
356:
323:
112:canisters used as part of the
1:
748:Cold Cathode Gauge Experiment
723:Modular Equipment Transporter
235:
82:was laid out in a line by an
73:
848:Rendezvous Docking Simulator
659:Portable Life Support System
568:Apollo Abort Guidance System
142:
125:
7:
827:Apollo 11 goodwill messages
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120:
10:
921:
794:Mobile quarantine facility
738:Lunar Surface Magnetometer
286:NASA reference publication
159:
863:
835:
802:
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743:Lunar Traverse Gravimeter
691:Active Seismic Experiment
649:
621:
603:Descent propulsion system
558:
507:
474:
443:
28:Active Seismic Experiment
733:Lunar Surface Gravimeter
608:Ascent propulsion system
583:Lunar Sounder Experiment
578:Apollo Guidance Computer
573:Apollo Docking Mechanism
363:Nakamura, Yosio (2011).
313:ALSEP Termination Report
900:Apollo program hardware
674:list of retroreflectors
437:Apollo program hardware
180:site and the Apollo 16
779:Launch Umbilical Tower
593:Apollo Telescope Mount
166:compressional velocity
152:
135:
92:ballistic trajectories
60:principal investigator
24:
534:Apollo service module
520:Apollo command module
215:Reflection seismology
150:
133:
62:was Robert Kovach of
22:
843:Lunar escape systems
753:Heat Flow Experiment
664:Lunar Roving Vehicle
382:10.1029/2011JE003972
815:Lunar Flag Assembly
784:Crawler-transporter
539:Apollo Lunar Module
64:Stanford University
58:. The experiment's
905:Geophysical survey
225:Seismic tomography
220:Seismic refraction
174:Seismic velocities
153:
136:
56:elastic properties
25:
23:Diagram of the ASE
877:
876:
629:Apollo/Skylab A7L
198:meteorite impacts
110:mortar ammunition
102:Hexanitrostilbene
34:) was carried on
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869:
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821:Fallen Astronaut
613:Scimitar antenna
598:Apollo TV camera
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335:www.lpi.usra.edu
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210:Lunar seismology
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494:Instrument unit
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42:as part of the
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767:Ground support
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106:seismic source
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650:Lunar surface
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451:Little Joe II
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810:Lunar plaque
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393:Bibliography
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338:. Retrieved
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230:Seismic wave
163:
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31:
27:
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854:Moon Museum
622:Space suits
194:comminution
188:and highly
108:generating
884:Categories
803:Ceremonial
634:Beta cloth
561:components
559:Spacecraft
508:Spacecraft
489:J-2 engine
484:F-1 engine
477:components
340:2020-05-17
236:References
196:caused by
186:brecciated
74:Experiment
895:Apollo 16
890:Apollo 14
652:equipment
461:Saturn IB
182:Descartes
178:Fra Mauro
143:Apollo 16
126:Apollo 14
84:astronaut
80:geophones
68:Apollo 17
52:explosive
40:Apollo 16
36:Apollo 14
526:Columbia
466:Saturn V
456:Saturn I
204:See also
170:regolith
121:Missions
96:detonate
88:grenades
836:Related
515:Apollo
375:(E12).
160:Results
190:porous
48:mortar
545:Eagle
317:(PDF)
261:(PDF)
50:with
38:and
377:doi
373:116
200:.
32:ASE
886::
371:.
367:.
333:.
301:^
278:^
243:^
429:e
422:t
415:v
385:.
379::
343:.
30:(
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