urn:nasa:pds:a15hfe_thermal_conductivity:data:a15_hfe_p2_3 1.0 1.23.0.0 Product_Observational 2025 This table contains Apollo 15 heat flow data from probe 2: Heater state and thermocouple temperatures for probe cable 1, 2, 3, and 4. Diagrams of the thermocouples in the literature are labelled inconsistently. It is obvious from the data that the thermocouple labelled TC1 here is out on the surface, as it undergoes the greatest temperature variations on all four probe data sets. Likewise the thermocouple labelled TC4 is obviously the one mounted on the top of the probe, deepest in the hole, as it undergoes the least temperature changes and closely matches the temperatures recorded by the probe sensors in the same location. In many cases, such as in the Apollo 15 Preliminary Science Report, Thermocouple 1 refers to the thermocouple on top of the probe, follwed by thermocouples 4, 3, and 2 in the cable in order of distance from the probe. We will use the convention outlined above for this table. 2025-08-13 1.0 Initial version. 1971-07-31T19:48:52Z 1974-12-31T21:14:17Z Apollo 15 Mission urn:nasa:pds:context:investigation:mission.apollo_15 data_to_investigation The Apollo 15 Lunar Surface Experiments Package Host urn:nasa:pds:context:instrument_host:spacecraft.a15a is_instrument_host Apollo 15 Lunar Surface Experiments Package Heat Flow Experiment Instrument urn:nasa:pds:context:instrument:hfe.a15a is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target a15_hfe_p2_3.tab 2012-01-28T17:00:00Z

0 216 7-Bit ASCII Text

TABLE 216 28846 Carriage-Return Line-Feed 7 0 108 TIME 1 2 ASCII_Real 14 millisecond Time in milliseconds since the beginning of the year in which the experiment was activated: 00:00 UTC 1 January 1971. HTR 2 17 ASCII_Real 14 Heater state: An integer between 1 and 16 converted to a real number. The translation of these values had not yet been determined nor is it clear what the (integer) value -9999 means. -9.9990000E+03 TREF 3 32 ASCII_Real 14 Kelvin Reference bridge temperature: The temperature in kelvin measured by the thermocouple in the isothermal block within the surface electronics package. The temperature of the surface electronics package was controlled nominally between 278 and 328 K. TC1 4 47 ASCII_Real 14 Kelvin Thermocouple temperature in kelvin for probe cable 1 - the thermocouple in the cable furthest from the probe, on the surface. TC2 5 62 ASCII_Real 14 Kelvin Thermocouple temperature in kelvin for probe cable 2 - on surface. TC3 6 77 ASCII_Real 14 Kelvin Thermocouple temperature in kelvin for probe cable 3 - the thermocouple in the cable closest to the probe, on surface. TC4 7 92 ASCII_Real 14 Kelvin Thermocouple temperature in kelvin for probe cable 4 - the thermocouple on top of of the probe, approximately 6 cm above the surface.