## description

This collection contains ASCII tables containing corrected, reduced, and
concatenated versions of data from all available sources for the Apollo 15 and
17 Heat Flow Experiment. Subdirectories contain three separate reduced sets:
'clean,' 'split,' and 'depth.' These tables are based on other data in the PDS
and the published literature, specifically (1) transcriptions of data sent by
the original instrument team to the NSSDC and (2) data not archived by the
instrument team and recovered much later from ARCSAV tapes. The data here
correct several errors in (1), and furthermore place (1) and (2) into a
standardized format for ease of use.

## files

/clean
----
This set is designed for maximum compatibility with existing workflows
designed for the 1971-1974 PDS-archived Lamont/NSSDC data. It includes data
from both NSSDC and Nagihara sets. It retains the rough file structure of the
PDS-archived Lamont/NSSDC data; it organizes the Nagihara sets by mission and
year and leaves them separate from the NSSDC sets. Numbers in these files are
standardized to format and units equivalent to the NSSDC sets (with the
exception of the time field in data derived from the Nagihara sets). dT
corrections for affected files are included in a separate field (dT_corr).
Many other errors are flagged using a bitmask (see documentation).

/clean/a15
----
Apollo 15 'clean' files. Subdirectory separated from Apollo 17 files to follow
PDS4 conventions for number of products per subdirectory.

- a15_1975p1f1.tab
Data from Apollo 15 probe 1 upper gradient bridge in April-June 1975.
Derived from data in Nagihara et al. 2019 PDS release.

- a15_1975p1f2.tab
Data from Apollo 15 probe 1 lower gradient bridge in April-June 1975. Derived
from data in Nagihara et al. 2019 PDS release.

- a15_1975p2f1.tab
Data from Apollo 15 probe 2 upper gradient bridge in April-June 1975. Derived
from data in Nagihara et al. 2019 PDS release.

- a15_1975p1f2.tab
Data from Apollo 15 probe 2 lower gradient bridge in April-June 1975. Derived
from data in Nagihara et al. 2019 PDS release.

- a15p1f1.tab
Data from Apollo 15 probe 1 upper gradient bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p1f2.tab
Data from Apollo 15 probe 1 lower gradient bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p1f3.tab
Data from Apollo 15 reference thermometer and probe 1 thermocouples,
1971-1974. Derived from NSSDC/Lamont data.

- a15p1f4.tab
Data from Apollo 15 probe 1 upper ring bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p1f5.tab
Data from Apollo 15 probe 1 lower ring bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p2f1.tab
Data from Apollo 15 probe 2 upper gradient bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p2f2.tab
Data from Apollo 15 probe 2 lower gradient bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p2f3.tab
Data from Apollo 15 reference thermometer and probe 2 thermocouples,
1971-1974. Derived from NSSDC/Lamont data.

- a15p2f4.tab
Data from Apollo 15 probe 2 upper ring bridge, 1971-1974. Derived from
NSSDC/Lamont data.

- a15p2f5.tab
Data from Apollo 15 probe 2 lower ring bridge, 1971-1974. Derived from
NSSDC/Lamont data.

/clean/a17
----
Apollo 17 'clean' files. Subdirectory separated from Apollo 15 files to follow
PDS4 conventions for number of products per subdirectory.

- a17_1975p1f1.tab
Data from Apollo 17 probe 1 upper gradient bridge in April-June 1975. Derived
from data in Nagihara et al. 2019 PDS release.

- a17_1975p2f1.tab
Data from Apollo 17 probe 2 upper gradient bridge in April-June 1975. Derived
from data in Nagihara et al. 2019 PDS release.

- a17_1976p1f1.tab
Data from Apollo 17 probe 1 upper gradient bridge in parts of 1976. Derived
from data in Nagihara et al. 2018 JGR Planets release.

- a17_1976p2f1.tab
Data from Apollo 17 probe 2 upper gradient bridge in parts of 1976. Derived
from data in Nagihara et al. 2018 JGR Planets release.

- a17_1977p1f1.tab
Data from Apollo 17 probe 1 upper gradient bridge in parts of 1977. Derived
from data in Nagihara et al. 2018 JGR Planets release.

- a17_1977p2f1.tab
Data from Apollo 17 probe 2 upper gradient bridge in parts of 1977. Derived
from data in Nagihara et al. 2018 JGR Planets release.

- a17p1f1.tab
Data from Apollo 17 probe 1 upper gradient bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p1f2.tab
Data from Apollo 17 probe 1 lower gradient bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p1f3.tab
Data from Apollo 17 reference thermometer and probe 1 thermocouples,
1972-1974. Derived from NSSDC/Lamont data.

- a17p1f4.tab
Data from Apollo 17 probe 1 upper ring bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p1f5.tab
Data from Apollo 17 probe 1 lower ring bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p2f1.tab
Data from Apollo 17 probe 2 upper gradient bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p2f2.tab
Data from Apollo 17 probe 2 lower gradient bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p2f3.tab
Data from Apollo 17 reference thermometer and probe 2 thermocouples,
1972-1974. Derived from NSSDC/Lamont data.

- a17p2f4.tab
Data from Apollo 17 probe 2 upper ring bridge, 1972-1974. Derived from
NSSDC/Lamont data.

- a17p2f5.tab
Data from Apollo 17 probe 2 lower ring bridge, 1972-1974. Derived from
NSSDC/Lamont data.

/split
----
'Clean' set further reduced and standardized for ease of use. Discards most of
'the flagged points from the 'clean' set and gives explicit temperature
'readings for each thermometer rather than giving average temperature and
'temperature difference values at each thermometer bridge. Converts mission
'epoch time to YMD UTC. Concatenates the Nagihara sets with the NSSDC sets,
'giving all available temperature data in a single series per thermometer.
'Retains 'file' distinction; in other words, there is still one table per
'thermometer bridge.

- a15p1f1_split.tab
Data from Apollo 15 probe 1 upper gradient bridge, 1971-1975.

- a15p1f2_split.tab
Data from Apollo 15 probe 1 lower gradient bridge, 1971-1975.

- a15p1f3_split.tab
Data from Apollo 15 reference thermometer and probe 1 thermocouples,
1971-1974.

- a15p1f4_split.tab
Data from Apollo 15 probe 1 upper ring bridge, 1971-1974.

- a15p1f5_split.tab
Data from Apollo 15 probe 1 lower ring bridge, 1971-1974.

- a15p2f1_split.tab
Data from Apollo 15 probe 2 upper gradient bridge, 1971-1975.

- a15p2f2_split.tab
Data from Apollo 15 probe 2 lower gradient bridge, 1971-1975.

- a15p2f3_split.tab
Data from Apollo 15 reference thermometer and probe 2 thermocouples,
1971-1974.

- a15p2f4_split.tab
Data from Apollo 15 probe 2 upper ring bridge, 1971-1974.

- a15p2f5_split.tab
Data from Apollo 15 probe 2 lower ring bridge, 1971-1974.

- a17p1f1_split.tab
Data from Apollo 17 probe 1 upper gradient bridge, 1972-1977.

- a17p1f2_split.tab
Data from Apollo 17 probe 1 lower gradient bridge, 1972-1974.

- a17p1f3_split.tab
Data from Apollo 17 reference thermometer and probe 1 thermocouples,
1972-1974.

- a17p1f4_split.tab
Data from Apollo 17 probe 1 upper ring bridge, 1972-1974.

- a17p1f5_split.tab
Data from Apollo 17 probe 1 lower ring bridge, 1972-1974.

- a17p2f1_split.tab
Data from Apollo 17 probe 2 upper gradient bridge, 1972-1977.

- a17p2f2_split.tab
Data from Apollo 17 probe 2 lower gradient bridge, 1972-1974.

- a17p2f3_split.tab
Data from Apollo 17 reference thermometer and probe 2 thermocouples,
1972-1974.

- a17p2f4_split.tab
Data from Apollo 17 probe 2 upper ring bridge, 1972-1974.

- a17p2f5_split.tab
Data from Apollo 17 probe 2 lower ring bridge, 1972-1974.

/depth
----
The 'split' set further reduced for ease of use, giving temperature, time, and
depth in one table per mission. This set *only* includes depth values for
sensors below the surface and discards values for TC4 to avoid ambiguity with
TG11A. 

- a15p1_depth.tab
Data from Apollo 15 probe 1.

- a15p2_depth.tab
Data from Apollo 15 probe 2.

- a17p1_depth.tab
Data from Apollo 17 probe 1.

- a17p2_depth.tab
Data from Apollo 17 probe 2.