PDS: The Planetary Atmospheres Node
The data presented above are provided at 1-km altitude increments. The enhanced vertical (and time) resolution data set of derived Entry, Descent, and Landing variables (altitude, density, pressure, temperature) and other relevant measurements is provided in the PHXPROFILES.TAB ASCII data file, which is located within the Reduced Data collection. The contents of PHXCOMPACT.TAB file are derived from the contents of the PHXPROFILE.TAB file as described within the DATASET.CAT file located in the Documents collection.
Atmospheric Structure Experiment (ASE)
During the Entry, Descent, and Landing (EDL) phase of the mission, atmospheric data were collected in order to determine the first profiles of atmospheric density, pressure, and temperature from a martian polar region.
http://phoenix.lpl.arizona.edu/science_met.php
To the right is shown the atmospheric temperature profile (as a function of altitude) and the +/- 1 σ uncertainties derived from the acceleration measurements obtained during the Phoenix Lander's Entry, Descent, and Landing on May 25, 2008.
Atmospheric Density and Pressure profiles were also derived from the EDL accelerometer measurements. In fact, Density is the primary derived quantity. Pressure is derived via vertical integration of the Density, and Temperature is then derived via application of the Ideal Gas Law to the derived Density and Pressure values.
All of these quantities: the derived density, derived pressure, and derived temperature profiles, as well as the 1-σ errors, are provided at 1-kilometer vertical resolution altitude intervals in the PHXCOMPACT.TAB ASCII file in the Raw Data collection.
http://phoenix.lpl.arizona.edu/science_met.php
To the right is shown the atmospheric temperature profile (as a function of altitude) and the +/- 1 σ uncertainties derived from the acceleration measurements obtained during the Phoenix Lander's Entry, Descent, and Landing on May 25, 2008.
Atmospheric Density and Pressure profiles were also derived from the EDL accelerometer measurements. In fact, Density is the primary derived quantity. Pressure is derived via vertical integration of the Density, and Temperature is then derived via application of the Ideal Gas Law to the derived Density and Pressure values.
All of these quantities: the derived density, derived pressure, and derived temperature profiles, as well as the 1-σ errors, are provided at 1-kilometer vertical resolution altitude intervals in the PHXCOMPACT.TAB ASCII file in the Raw Data collection.
PDS4 Beta Testers
Useful Mission Documents
(Also found in Document Collection)
Software Interface Specification (SIS) - Description of the instrument and data structures
Archive Bundle Contents
ASE Bundle Root - The root directory for the entire ASE instrument bundle.
Document - Directory containing the documentation collection, including references to refereed journals using this instrument.
Raw Data - Directory containing the EDR data files for EDL.
Reduced Data - Directory containing the RDR data files for EDL.
Complete Bundle - Zip file containing the entire ASE Bundle
Other Useful Products for Interpreting the Data
Other Potential Relevant Data - Data that may be relevant from missions other than PHX
SPICE - Archived PHX SPICE ancillary data providing observation geometry (positions, orientations, instrument pointing, time conversions, etc.) are available from the PDS NAIF Node.
