Uploaded June 2024 | Updated September 2026, 2 weeks ago
The Apollo Lunar Surface Experiments Package (ALSEP) was a modular, automatic system for collecting data on the lunar surface and transmitting it back to earth. Six ALSEP systems were installed on the moon over six successful lunar landings, and the data they returned added immensely to our scientific knowledge of the moon's history, geology, and environment.
0:00 Introduction
0:18 ALSEP Design Requirements + Architecture
2:10 Central Station
2:29 SNAP-27 Radioisotope Thermoelectric Generator (RTG)
4:30 Apollo 11 - Early Apollo Scientific Experiments Package (EASEP)
4:59 Laser Ranging Retroreflector (LRRR)
5:43 Passive Seismic Experiment Package (PSEP) / Passive Science Experiment (PSE)
6:46 Apollo 12 - RTG Fuelling + ALSEP Deployment
9:36 Dust, Thermal, and Radiation Engineering Measurements Experiment (DTREM)
10:00 Lunar Surface Magnetometer (LSM)
10:10 Solar Wind Spectrometer (SWS)
10:25 Superthermal Ion Detector Experiment (SIDE) + Cold Cathode Ion Gauge (CCIG)
11:42 Apollo 13 - Cold Cathode Gauge Experiment (CCGE)
11:57 Charged Particle Lunar Environment Experiment (CPLE)
12:01 Heat Flow Experiment (HFE)
12:27 Apollo 14 - Active Seismic Experiment (ASE)
14:00 Apollo 15+16 Experiments
14:56 Apollo 17 - Heat Flow Experiment (HFE)
15:08 Lunar Seismic Profiling Experiment (LSPE)
15:47 Lunar Atmospheric Composition Experiment (LACE)
16:00 Lunar Ejecta and Meteorites Experiment (LEAM)
16:37 Lunar Surface Gravimeter (LSG)
17:10 Non-ALSEP Lunar Experiments
18:26 Outro
SOURCES:
ninfinger.org/karld/My%20Space%20Museum/ALSEP.htm
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1971-063C-09
space.stackexchange.com/questions/37636/what-was-the-purpose-of-a-boyd-bolt
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1969-099C-03
darts.isas.jaxa.jp/planet/seismology/apollo/The_Description_of_Apollo_Seismic_Experiments.pdf
https://www.lpi.usra.edu/lunar/missions/apollo/apollo_11/experiments/lrr/
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1972-096C-09
The Apollo Lunar Surface Experiments Package (ALSEP) was a modular, automatic system for collecting data on the lunar surface and transmitting it back to earth. Six ALSEP systems were installed on the moon over six successful lunar landings, and the data they returned added immensely to our scientific knowledge of the moon's history, geology, and environment.
0:00 Introduction
0:18 ALSEP Design Requirements + Architecture
2:10 Central Station
2:29 SNAP-27 Radioisotope Thermoelectric Generator (RTG)
4:30 Apollo 11 - Early Apollo Scientific Experiments Package (EASEP)
4:59 Laser Ranging Retroreflector (LRRR)
5:43 Passive Seismic Experiment Package (PSEP) / Passive Science Experiment (PSE)
6:46 Apollo 12 - RTG Fuelling + ALSEP Deployment
9:36 Dust, Thermal, and Radiation Engineering Measurements Experiment (DTREM)
10:00 Lunar Surface Magnetometer (LSM)
10:10 Solar Wind Spectrometer (SWS)
10:25 Superthermal Ion Detector Experiment (SIDE) + Cold Cathode Ion Gauge (CCIG)
11:42 Apollo 13 - Cold Cathode Gauge Experiment (CCGE)
11:57 Charged Particle Lunar Environment Experiment (CPLE)
12:01 Heat Flow Experiment (HFE)
12:27 Apollo 14 - Active Seismic Experiment (ASE)
14:00 Apollo 15+16 Experiments
14:56 Apollo 17 - Heat Flow Experiment (HFE)
15:08 Lunar Seismic Profiling Experiment (LSPE)
15:47 Lunar Atmospheric Composition Experiment (LACE)
16:00 Lunar Ejecta and Meteorites Experiment (LEAM)
16:37 Lunar Surface Gravimeter (LSG)
17:10 Non-ALSEP Lunar Experiments
18:26 Outro
SOURCES:
ninfinger.org/karld/My%20Space%20Museum/ALSEP.htm
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1971-063C-09
space.stackexchange.com/questions/37636/what-was-the-purpose-of-a-boyd-bolt
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1969-099C-03
darts.isas.jaxa.jp/planet/seismology/apollo/The_Description_of_Apollo_Seismic_Experiments.pdf
https://www.lpi.usra.edu/lunar/missions/apollo/apollo_11/experiments/lrr/
nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1972-096C-09
