The Interstellar Mapping and Acceleration Probe (IMAP) Data <https://spdf.gsfc.nasa.gov/pub/data/imap/>


This directory gathers data for the Interstellar Mapping and Acceleration Probe (IMAP), launched to the orbit around L1 on September 24, 2025, with primary mission starting on February 1, 2026. With an extensive set of 10 instruments, IMAP is equipped to observe a vast range of particle energies and types in interplanetary space in order to simultaneously investigate two of the most important overarching issues in heliophysics – the energization of charged particles, and interaction of the solar wind with the winds from other stars and other material that fills our galaxy. See IMAP homepage <https://imap.princeton.edu/>.

See CDAWeb <https://cdaweb.gsfc.nasa.gov> for plots and listings, with other access methods <https://cdaweb.gsfc.nasa.gov/alternative_access_methods.html>. 


Subdirectories:

    /documents/  -  IMAP documents, including Calibration and Measurement Algorithms Document (CMAD).
    /codice/  -  Compact Dual Ion Composition Experiment (CoDICE) Data. Like its sister instrument Solar Wind and Pickup Ions (SWAPI), the CoDICE instrument collects and counts two types of particles: ones from the solar wind flowing from the Sun and particles called pick-up ions (PUIs) that entered the heliosphere from outside our solar neighborhood and traveled inwards where IMAP orbits about a million miles from the Earth. The solar wind particles CoDICE collects and sorts are highly energized particles, called suprathermal particles, which are moving faster (and therefore have higher energy) than the solar wind particles that SWAPI collects. CoDICE also simultaneously measures the velocity, direction of travel, energies, and types of specific species of PUIs from the local interstellar medium. Some of these are hydrogen and helium ions like SWAPI, but CoDICE is also able to collect and analyze heavier ions than SWAPI can. See CoDICE homepage <https://imap.princeton.edu/mission/instruments/compact-dual-ion-composition-experiment-codice>.
    /glows/  -  GLObal Solar Wind Structure (GLOWS) Instrument Data. The GLOWS instrument investigates the structure of the solar wind - how it varies from one solar pole to the  other - and how it shifts during the solar cycle. To that end, GLOWS looks at the distribution of the helioglow. See GLOWS homepage <https://imap.princeton.edu/mission/instruments/global-solar-wind-structure-glows>.
    /hit/  -  High-energy Ion Telescope (HIT) Data. The HIT instrument captures very energetic solar particles through a series of apertures, or openings, leading to a series of silicon solid-state detectors that allow scientists to determine the type of particle or species each are, the amount of energy they possess, and the direction they are coming from in our solar neighborhood, the heliosphere. See HIT homepage <https://imap.princeton.edu/mission/instruments/high-energy-ion-telescope-hit>.
    /idex/  -  Interstellar Dust Experiment (IDEX) Data. The IDEX instrument collects and analyzes interstellar dust and interplanetary dust particles found in our solar system to understand better their compositions, the speeds they travel, their concentrations within our solar system, and their interactions with the solar wind. IDEX homepage <https://imap.princeton.edu/mission/instruments/interstellar-dust-experiment-idex>.
    /mag/  -  Magnetometer (MAG) Data. MAG instrument is a magnetometer which measures the strength and direction of the magnetic field in interplanetary space as the field is carried past the IMAP spacecraft by the solar wind. See MAG homepage <https://imap.princeton.edu/mission/instruments/magnetometer-mag>.
    /swapi/  -  Solar Wind and Pickup Ions (SWAPI) Data. The SWAPI instrument collects and counts two types of particles: ones from the solar wind flowing from the Sun and particles called pick-up ions (PUIs) that have entered the heliosphere from outside our solar neighborhood and traveled inwards where IMAP orbits near Earth. See SWAPI homepage <https://imap.princeton.edu/mission/instruments/solar-wind-and-pickup-ions-swapi>.
    /swe/  -  Solar Wind Electron (SWE) Data. The SWE instrument collects and counts electrons from the solar wind. SWE collects electrons that have energies of 1-5000 electron volts. See SWE homepage <https://imap.princeton.edu/mission/instruments/solar-wind-electron-swe>.
    /ialirt/  -  Active Link for Real-Time (I-ALiRT) Data. Five instruments on the Interstellar Mapping and Acceleration Probe (IMAP) mission — SWAPI, CoDICE, HIT, MAG, and SWE — make in-situ space weather measurements at the Sun-Earth Lagrange Point 1 (L1) that are critical for advancing space weather research and operational forecasting. These near-real time measurements are continuously broadcast from the IMAP observatory as part of the IMAP Active Link for Real-Time (I‑ALiRT) space weather data system. See I-ALiRT homepage <https://imap-mission.com/ialirt>.
    /ephemeris/  -  1-minute IMAP position in J2000, GSE, and GSM coordinates from SPDF SSCWeb.
    /helio1hr/  -  Hourly IMAP position in heliocentric coordinates from SPDF Helioweb.


IMAP Home Page <https://imap.princeton.edu/>

IMAP Mission and Science Instruments Special Paper Collection <https://link.springer.com/collections/djacjcecei>.

IMAP Calibration and Measurement Algorithms Document (CMAD) <https://spdf.gsfc.nasa.gov/pub/data/imap/documents/cmad/>


Data contacts: 
NASA/GSFC SPDF: Andriy Koval <andriy.koval@nasa.gov>

Last updated on September 10, 2026