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Dataset Description

Roberts, Dona edited this page Dec 15, 2024 · 90 revisions

For the Perseverance mission, we have two sources of data:

  1. Laser-induced breakdown spectroscopy (LIBS)
  2. Physical samples taken from the ground (Samples)

In addition to the data received from Perseverance, we have a dataset linking the LIBS data to the Sample data and we have a dataset detailing features of the various Minerals involved in the Sample data.

The following four sections will go into the details of the datasets involved in these groups.

LIBS

The LIBS data comes from Perseverance's laser, which it points at rock and scans for the concentration of elemental compounds.

Of the LIBS data, we have two types.

  • LIBS scans of Mars rock
  • LIBS scans of Earth rock taken to Mars to be used for calibration (scct)

LIBS Scans

This is the LIBS scans of rock actually on mark, you can find this dataset on GitHub here v1_libs.Rds.

The v1_libs.Rds dataset consists of the following columns:

Col name: Data type: Levels: What:
Target Character Name of location the LIBS was pointed at
Point Factor 1 - 28 For each target, there are up to 28 "points"
Sol Numeric Int > 0 The Mars day (since start of mission) that the rover took the LIBS point
Lat Numeric Latitude of the rover when the LIBS point was taken
Lon Numeric Longitude of the rover when the LIBS point was taken
Type Character What is it a scan of? (Sample, AEGIS, other?)
Cluster Factor 1 - 4 What cluster the LIBS point is in in our most common clustering method
SiO2 Numeric Concentration of Silicon dioxide at target point
SiO2_stdev Numeric Standard deviation of concentration of Silicon dioxide
TiO2 Numeric Concentration of Titanium dioxide at target point
TiO2_stdev Numeric Standard deviation of concentration of Titanium dioxide
Al2O3 Numeric Concentration of Aluminum trioxide at target point
Al2O3_stdev Numeric Standard deviation of concentration of Aluminum trioxide
FeOT Numeric Concentration of Iron oxides at target point
FeOT_stdev Numeric Standard deviation of concentration of Iron oxides
MgO Numeric Concentration of Magnesium oxide at target point
MgO_stdev Numeric Standard deviation of concentration of Magnesium oxide
CaO Numeric Concentration of Calcium oxide at target point
CaO_stdev Numeric Standard deviation of concentration of Calcium oxide
Na2O Numeric Concentration of Sodium oxide at target point
Na2O_stdev Numeric Standard deviation of concentration of Sodium oxide
K2O Numeric Concentration of Potassium oxide at target point
K2O_stdev Numeric Standard deviation of concentration of Potassium oxide
Total Numeric The sum of concentrations of elemental compounds
distance_mm Numeric
Tot.Em. Numeric

Feature data is the same as PIXL, concentration of elemental compounds, though without a few of the elemental compounds PIXL includes. It also has the addition of standard deviations, Total, etc, which PIXL doesn't have.

LIBS Earth References

v1_libs_earth_references.Rds

Only the "scct" targets. That is, only the earth references. Note that none of these earth references are in the normal LIBS data frame.

Col name: Data Type: Levels: What:
Target Character Name of location the LIBS was taken, all start with "scct_"
Point Factor 1 - 28
Sol Numeric Int > 0 The Mars day (since start of mission) that the rover took the LIBS point was taken
Lat Numeric Where the rover was when the LIBS point was taken
Lon Numeric Where the rover was when the LIBS point was taken
Type Character What earth mineral is it calibrating for
SiO2 Numeric
SiO2_stdev Numeric
TiO2 Numeric
TiO2_stdev Numeric
Al2O3 Numeric
Al2O3_stdev Numeric
FeOT Numeric
FeOT_stdev Numeric
MgO Numeric
MgO_stdev Numeric
CaO Numeric
CaO_stdev Numeric
Na2O Numeric
Na2O_stdev Numeric
K2O Numeric
K2O_stdev Numeric
Total Numeric
distance_mm Numeric
Tot.Em. Numeric

Sample data

Sample data is the data for the, currently 16, physical samples the rover has taken.

Meta Data

v1_sample_meta.Rds

A data frame containing all the meta data for the samples. This can be appended to Pixl, Lithology, or Sherloc based on "Sample".

Col name: Data Type: Levels: What:
Sample Integer 1 - 24 Note that this sample number does not match the sample numbers in the analyst notebook and initial reports
Name Character Unique name given to each sample
Sol Numeric Int > 0 The Mars day (since the start of mission) that the sample was taken
Lat Numeric Where the sample was taken
Lon Numeric Where the sample was taken
Abrasion Factor The name of the bit of rock they abraided
Campaign Factor "Crater Floor" or "Delta Front" Indicates whether the sample location was in the crater floor or at the delta front
Type Factor "Sedimentary", "Igneous", or "Atmospheric" Indicates the type of rock the sample is.
SampleType Factor "rock core", "regolith", or "atmospheric" Indicates how the sample was obtained

PIXL

v1_pixl.Rds

Starts with the sample number. Following is all numeric elemental compound concentrations.

Col name: Data type:
Sample Integer
SiO2 Numeric
TiO2 Numeric
Al2O3 Numeric
FeOT Numeric
MgO Numeric
CaO Numeric
Na2O Numeric
K2O Numeric
P2O5 Numeric
SO3 Numeric
Cl Numeric
Cr2O3 Numeric
MnO Numeric

Lithology

v1_lithology.Rds

Starts with the sample number. Following columns are all factor data (binary 0 or 1) representing the presence or absence of minerals.

Col name: Data type: Levels:
Sample Integer 1 - 24
Plagioclase Factor 0 or 1
Sulfate Factor 0 or 1
Ca-sulfate Factor 0 or 1
Hydrated Ca-sulfate Factor 0 or 1
Mg-sulfate Factor 0 or 1
Hydrated Sulfates Factor 0 or 1
Hydrated Mg-Fe sulfate Factor 0 or 1
Perchlorates Factor 0 or 1
Na-perchlorate Factor 0 or 1
Amorphous Silicate Factor 0 or 1
Phosphate Factor 0 or 1
Pyroxene Factor 0 or 1
Olivine Factor 0 or 1
Carbonate Factor 0 or 1
Fe-Mg carbonate Factor 0 or 1
Hydrated Carbonates Factor 0 or 1
Disordered Silicates Factor 0 or 1
Feldspar Factor 0 or 1
Quartz Factor 0 or 1
Apatite Factor 0 or 1
FeTi oxides Factor 0 or 1
Halite Factor 0 or 1
Iron oxide Factor 0 or 1
Hydrated Iron oxide Factor 0 or 1
Organic matter Factor 0 or 1
Sulfate+Organic matter Factor 0 or 1
Other hydrated phases Factor 0 or 1
Phyllosilicates Factor 0 or 1
Chlorite Factor 0 or 1
Kaolinite (hydrous Al-clay) Factor 0 or 1
Chromite Factor 0 or 1
Ilmenite Factor 0 or 1
Zircon/Baddeleyite Factor 0 or 1
Fe-Mg-clay minerals Factor 0 or 1
Spinels Factor 0 or 1

Sherloc

v1_sherloc.Rds

Starts with the sample number. Following columns are all factor data representing the certainty in the presence of minerals. This is discrete data though, with the only options being "0" (No detection), "0.25" (Possible but not confirmed), "0.5" (Almost certain, working on confirming), "0.75" (?), and "1" (confirmed).

Col name: Data type: Levels:
Sample Integer 1 - 24
Plagioclase Factor 0, 0.25, 0.5, 0.75, or 1
Sulfate Factor 0, 0.25, 0.5, 0.75, or 1
Ca-sulfate Factor 0, 0.25, 0.5, 0.75, or 1
Hydrated Ca-sulfate Factor 0, 0.25, 0.5, 0.75, or 1
Mg-sulfate Factor 0, 0.25, 0.5, 0.75, or 1
Hydrated Sulfates Factor 0, 0.25, 0.5, 0.75, or 1
Hydrated Mg-Fe sulfate Factor 0, 0.25, 0.5, 0.75, or 1
Perchlorates Factor 0, 0.25, 0.5, 0.75, or 1
Na-perchlorate Factor 0, 0.25, 0.5, 0.75, or 1
Amorphous Silicate Factor 0, 0.25, 0.5, 0.75, or 1
Phosphate Factor 0, 0.25, 0.5, 0.75, or 1
Pyroxene Factor 0, 0.25, 0.5, 0.75, or 1
Olivine Factor 0, 0.25, 0.5, 0.75, or 1
Carbonate Factor 0, 0.25, 0.5, 0.75, or 1
Fe-Mg carbonate Factor 0, 0.25, 0.5, 0.75, or 1
Hydrated Carbonates Factor 0, 0.25, 0.5, 0.75, or 1
Disordered Silicates Factor 0, 0.25, 0.5, 0.75, or 1
Feldspar Factor 0, 0.25, 0.5, 0.75, or 1
Quartz Factor 0, 0.25, 0.5, 0.75, or 1
Apatite Factor 0, 0.25, 0.5, 0.75, or 1
FeTi oxides Factor 0, 0.25, 0.5, 0.75, or 1
Halite Factor 0, 0.25, 0.5, 0.75, or 1
Iron oxide Factor 0, 0.25, 0.5, 0.75, or 1
Hydrated Iron oxide Factor 0, 0.25, 0.5, 0.75, or 1
Organic matter Factor 0, 0.25, 0.5, 0.75, or 1
Sulfate+Organic matter Factor 0, 0.25, 0.5, 0.75, or 1
Other hydrated phases Factor 0, 0.25, 0.5, 0.75, or 1
Phyllosilicates Factor 0, 0.25, 0.5, 0.75, or 1
Chlorite Factor 0, 0.25, 0.5, 0.75, or 1
Kaolinite (hydrous Al-clay) Factor 0, 0.25, 0.5, 0.75, or 1
Chromite Factor 0, 0.25, 0.5, 0.75, or 1
Ilmenite Factor 0, 0.25, 0.5, 0.75, or 1
Zircon/Baddeleyite Factor 0, 0.25, 0.5, 0.75, or 1
Fe-Mg-clay minerals Factor 0, 0.25, 0.5, 0.75, or 1
Spinels Factor 0, 0.25, 0.5, 0.75, or 1

LIBS to PIXL distances

v1_libs_to_sample.Rds

Col name: Data type: Levels: What:
Target.libs Character Name of location the LIBS was taken
Point.libs Factor 1 - 28
Sol.libs Numeric Int > 0 The Mars day (since start of mission) that the rover took the LIBS point was taken
Lat.libs Numeric Where the rover was when the LIBS point was taken
Lon.libs Numeric Where the rover was when the LIBS point was taken
Distance Numeric > 0 How far the nearest sample is from this LIBS scan
Abrasion.pixl Factor The name of the nearest abrasion to this LIBS scan
Campaign.pixl Factor "Crater Floor" or "Delta Front" Campaign of the nearest abrasion to this LIBS scan
Lat.pixl Numeric Where the nearest abrasion is
Lon.pixl Numeric Where the nearest abrasion is
SiO2.libs Numeric
TiO2.libs Numeric
Al2O3.libs Numeric
FeOT.libs Numeric
MgO.libs Numeric
CaO.libs Numeric
Na2O.libs Numeric
K2O.libs Numeric

Mineral types

aqueous.Rds

Col name: Data type: Levels: What:
Mineral Character List of minerals from SHERLOC
common_mineral Character What type of mineral is it? (Sulfate, Carbonate, Quartz, etc.)
aqueous Numeric 0 or 1 Binary true (1) or false (0)
formula Character The chemical formula for the mineral