{ "CDFFileInfo": { "FileVersion": "3.5.0", "Format": "SINGLE", "Majority": "COLUMN", "Encoding": "IBMPC" }, "CDFglobalAttributes": { "Project": "STP>Solar-Terrestrial Physics", "Source_name": "SET>CREDANCE Level 2 Data", "Discipline": "Space Physics>Heliospheric Physics", "Data_type": "SET>The Space Environment Testbeds", "Descriptor": "SET>The Space Environment Testbeds", "File_naming_convention": "source_datatype_descriptor_yyyyMMdd", "Data_version": "01", "PI_name": "Dr. Keith Ryden", "PI_affiliation": "University of Surrey", "Instrument_type": "Space Weather Monitor", "Mission_group": "DSX, Space Environment Testbeds", "Logical_source": "dsx-set-credance-l2", "Logical_file_id": "dsx-set-credance-l2_00000000_v01", "Logical_source_description": "The Space Environment Testbeds (SET)", "Time_resolution": "5 min", "Rules_of_use": "The SET data are archived as fully citable. Please consult the team publications and personnel for further details on production, processing and usage of these data ", "Generated_by": "Sonya Lyatsky", "Generation_date": "07/07/2026", "Acknowledgement": "Please acknowledge the Mission Principal Investigator Dr. Keith Ryden, University of Surrey", "LINK_TEXT": "Space Environment Testbeds Overview", "LINK_TITLE": "Space Environment Testbeds Overview", "HTTP_LINK": "https://lws-set.gsfc.nasa.gov/index.html", "TEXT": [ "The Space Environment Testbeds (SET) Project performs flight and data investigations. It is part of the LWS program of Science Missions and Targeted Research and Technology (TR&T) ground-based investigations that respond to the following questions: How and why does the Sun vary? How do the Earth and planets respond? What are the effects on humanity? SET uses existing data and new data from the low-cost SET mission to achieve the following: define the mechanisms for space environment effects; reduce uncertainties in the environment and its effects on spacecraft and their payloads; improve design and operations guidelines and test protocols so that spacecraft anomalies and failures due to environmental effects during operations are reduced.", "The SET-1 payload is flown on the Air Force Research Laboratory (AFRL) Demonstration and Science Experiments (DSX) spacecraft. The mission is baselined for a 6000 x 12,000 km, 42 degree inclination orbit with 1 year of operations.", "Payload Experiments for SET-1: Cosmic Radiation Environment Dosimetry and Charging Experiment (CREDANCE). Objectives: 1) characterize the energetic space radiation environment and its interactions with spacecraft; 2) provide data to other SET-1 experiments.", "Goals: 1) provide data to improve radiation environment models and design tools; 2) demonstrate the value of a compact space weather monitor in operational spacecraft.", "Measurements: 1) proton flux >40 MeV per unit solid angle; 2) charge deposition in large silicon diodes arranged in telescopes -- pulse height analysis is used to obtain ion linear energy transfer (LET) spectra of heavy ions in the 100 MeV-cm2/g to 25000 MeV-cm2/g range; 3) threshold voltage shift in MOS dosimeters (RADFET) to measure total ionizing dose at 2 different shielding depths; 4) charging current in SURF plates at 3 different shielding depths to provide energetic electron flux measurements at 3 energies." ], "spase_DatasetResourceID": " " }, "CDFVariables": { "Epoch": { "VarDescription": { "DataType": "CDF_EPOCH", "NumDims": 0, "NumElements": 1, 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