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PDS Information
Find a Node - Use these links to navigate to any of the 8 publicly accessible PDS Nodes.

This bar indicates that you are within the PDS enterprise which includes 6 science discipline nodes and 2 support nodes which are overseen by the Project Management Office at NASA's Goddard Space Flight Center (GSFC). Each node is led by an expert in the subject discipline, supported by an advisory group of other practitioners of that discipline, and subject to selection and approval under a regular NASA Research Announcement.



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Instrument Description
The New Horizons (NH) Radio Science Experiment, REX, is designed to determine the atmospheric state at the surface of Pluto and in the lowest few scale heights.

Measurement Objectives
  • At Pluto radio occultation experiments are planned for both Pluto and Charon, but the level of accuracy for the neutral gas is expected to be useful at Pluto only. REX will also measure the nightside 4.2 cm-Å thermal emission from Pluto and Charon during the time NH is occulted. At Pluto, the thermal scan provides about five half-beams across the disk; at Charon, only disk integrated values can be obtained.

Jupiter Flyby

Raw Data


Calibrated Data


See Space Sci Rev (2008) 140: 217–259, DOI 10.1007/s11214-007-9302-3, G.L. Tyler, et al., The New Horizons Radio Science Experiment (REX) for further information

Pluto Encounter

Raw Data

Calibrated Data

See Space Sci Rev (2008) 140: 217–259, DOI 10.1007/s11214-007-9302-3, G.L. Tyler, et al., The New Horizons Radio Science Experiment (REX) for further information

Publications - A listing of team members to facilitate literature searches.