All Missions & Projects - Heliophysics Science Division ( 670 )

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ACE Cosmic Ray Isotope Spectrometer (CRIS)

The Cosmic Ray Isotope Spectrometer (CRIS) measures the abundances of galactic cosmic ray isotopes.

ACE Solar Isotope Spectrometer (SIS)

The Solar Isotope Spectrometer provides isotopically resolved measurements of the elements from lithium to zinc over the energy range 10 - 100 MeV/nucleon. The SIS dectector system consists of two identical telescopes composed of stacks of large-area solid-state detectors.

C/NOFS Coupled Ion Neutral Dynamic Investigation (CINDI)

CINDI involves two instruments on the C/NOFS satellite that measure the concentration and kinetic energy of the ions and neutral particles in space as the satellite passes through them. This information will be used in building models to understand the various structures in the ionosphere, such as plasma depletions and associated turbulence in the nightside, low-latitude ionosphere. These structures can interfere with radio signals between Earth and spacecraft in orbit, thus causing errors in tracking and loss of communication.

C/NOFS Vector Electric Field Instrument (VEFI)

VEFI measures direct current (DC) electric fields, which cause the bulk plasma motion that drives the ionospheric plasma to be unstable. Additionally, it measures the quasi-DC electric fields within the plasma density depletions to reveal the motions of the depletions relative to the background ionosphere. VEFI also measures the vector AC electric field, which characterizes the ionospheric disturbances associated with spread-F irregularities.

Cassini Dual Technique Magnetometer (MAG)

The Dual Technique Magnetometer (MAG), instruments onboard the Cassini spacecraft, is a Direct Sensing Instrument that measures the strength and direction of the magnetic field around Saturn.

Cassini Plasma Spectrometer (CAPS)

The Cassini Plasma Spectrometer (CAPS) measures the energy and electrical charge of particles such as electrons and protons that the instrument encounters.

Clouds and the Earth's Radiant Energy System (CERES)

CERES products include both solar-reflected and Earth-emitted radiation from the top of the atmosphere to the Earth's surface.
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The NASA/European Space Agency (ESA) Cluster mission was the first to deploy four identical spacecraft flying in formation to conduct three-dimensional studies of the interaction between Earth's magnetosphere and the "solar wind" of charged particles streaming off the sun. Science output from Cluster greatly advances our knowledge of space plasma physics, space weather, and the sun-Earth connection, and has been key in improving the modeling of the magnetosphere and understanding its various physical processes. The quartet of spacecraft went into orbit in two launches, in July and August 2000.

Cluster Plasma Electron And Current Experiment (PEACE)

A Plasma Electron And Current Experiment instrument can measure the three dimensional velocity distribution of electrons in a space plasma, for an energy range from a few electronvolts to about 30 kiloelectronvolts. A PEACE instrument is flying on each of the four Cluster II spacecraft, which were launched in the summer of 2000.

Community Coordinated Modeling Center (CCMC)

The Community Coordinated Modeling Center (CCMC) is a multi-agency partnership to enable, support, and perform the research and development for next-generation space science and space weather computer models. The CCMC partners include NASA; the National Science Foundation; the NOAA Space Weather Prediction Center; the Office of Naval Research; and the Air Force Materiel Command, Office of Scientific Research, Research Laboratory, and Weather Agency.
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Deep Space Climate Observatory (DSCOVR)

The Deep Space Climate Observatory, or DSCOVR, will maintain the nation's real-time solar wind monitoring capabilities which are critical to the accuracy and lead time of NOAA's space weather alerts and forecasts.
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Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS)

The Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS) sounding rocket instrument is an extreme ultraviolet solar spectrometer with high efficiency and high spectral resolution.
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Fast Auroral Snapshot Explorer (FAST)

The Fast Auroral Snapshot Explorer (FAST) mission has helped scientists answer fundamental questions about the causes and makeup of the aurora. FAST's primary objective was to study the microphysics of space plasma and the accelerated particles that cause the aurora. FAST's highly elliptical orbit enabled the spacecraft to cross over the auroral zones at Earth's poles four times each orbit. The spacecraft collected high-resolution data ("snapshots") only while in those auroral zones. It also ventured high into the charged particle environment of the aurora to measure the electric and magnetic fields, plasma waves, energetic electrons and ions, ion mass composition, and thermal plasma density and temperature. The FAST mission was launched in 1996.

FASTSat Thermospheric Temperature Imager (TTI)

The Thermospheric Temperature Imager (TTI) is one of three instruments on the FASTSat spacecraft.


Firefly will determine the source of Terrestrial Gamma-ray Flashes (TGFs), and will determine the extent to which TGFs are associated with energetic electrons that can escape the atmosphere to populate the inner radiation belt.


The Geotail mission is a collaboration between NASA and the Institute of Space and Astronautical Science (ISAS) of Japan. Its primary objective is to study the dynamics of Earth's magnetotail over a wide range of distances, extending from the near-Earth region to as far as about 200 Earth radii from the planet. The Geotail spacecraft measured global energy flow and transformation in the magnetotail to increase understanding of fundamental processes at work. Since February 1995, Geotail has provided data on most aspects of the solar wind interaction with the magnetosphere. Geotail was designed and built by ISAS and launched in 1992.
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Global-scale Observations of the Limb and Disk (GOLD)

The Global-scale Observations of the Limb and Disk (GOLD) mission of opportunity is an imaging instrument that will fly on a commercial communications satellite in geostationary orbit to image the Earth's thermosphere and ionosphere. GOLD was launched in January 2018 and is scheduled to begin science operations in October 2018.


Hinode, formerly known as Solar-B, is a satellite equipped with three advanced solar telescopes to explore the magnetic fields of the sun. The spacecraft's solar optical telescope (SOT), X-ray telescope, and EUV imaging spectrometer were designed to study the heating mechanism and dynamics of the extended solar atmosphere (corona). The observations will improve understanding of the mechanisms that power the corona and drive solar eruptions. Hinode was launched in 2006.

HINODE Extreme-ultraviolet Imaging Spectrometer (EIS)

EIS will provide monochromatic images of the transition region and corona at high cadence using a slot. High spectral resolution images can be obtained by rastering with a slit.

IMAGE Low Energy Neutral Atom (LENA)

LENA's instrument studied a particular particle population known as ionospheric outflow. These charged particles are confined and guided by magnetic field lines.

Imager for Magnetpause-to-Aurora Global Exploration (IMAGE)

IMAGE was the first satellite mission dedicated to imaging the Earth's magnetosphere, the region of space controlled by the Earth's magnetic field and containing extremely tenuous plasmas of both solar and terrestrial origin. Contact with IMAGE was lost in 2005 but rediscovered in 2018. Scientists and engineers at NASA are working to revive the mission.

Interface Region Imaging Spectrograph (IRIS)

Interface Region Imaging Spectrograph (IRIS) fills a crucial gap in NASA's ability to advance Sun-Earth connection studies.
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International Heliophysical Year (IHY)

International Heliophysical Year (IHY) is comprised of a joint program that targets activities which stimulate Space and Earth Science activities in developing nations, such as the establishment of ground-based instrument arrays and research programs.

Interstellar Boundary EXplorer (IBEX)

IBEX is the first mission designed to map the entire boundary region at the edge of the solar system. As electrically charged particles from the sun (the solar wind) flow outward beyond the orbits of the planets, they collide with the material between the stars -- the interstellar medium, or ISM. These interactions create energetic neutral atoms (ENAs), fast-moving particles with no charge. This region emits no light that can be collected by conventional telescopes, so IBEX, measures the ENAs that happen to be traveling inward from the boundary. IBEX's sole science objective is to discover the nature of the interactions between the solar wind and the interstellar medium at the edge of our solar system. The mission launched in 2008.

Ionospheric Connection Explorer (ICON)

ICON will explore the boundary between Earth and space – the ionosphere – to understand the physical connection between our world and the immediate space environment around us.
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