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RHESSI, TWINS, and STEREO-B have been decommissioned, while GOLD and Parker Solar Probe have been added. As of fall 2018, here's a tour of the NASA Heliophysics fleet from the near-Earth satellites out to the Voyagers beyond the heliopause.

The satellite orbits are color coded for their observing program:

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Near-Earth Fleet:

Geosynchronous Fleet:

Geospace Fleet:

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Lunar Orbiting Fleet:

Sun-Earth Lagrange Point One Fleet:

The L1 point is a Lagrange Point between the Sun and the Earth. Spacecraft can orbit this location for continuous coverage of the Sun.", "items": [], "extra_data": {} }, { "id": 324685, "url": "https://svs.gsfc.nasa.gov/4360/#media_group_324685", "widget": "Single image", "title": "", "caption": "", "description": "The inner solar orbiting fleet.", "items": [ { "id": 242186, "type": "media", "extra_data": null, "title": null, "caption": null, "instance": { "id": 398784, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004300/a004360/Sentinels2018.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.01100_print.jpg", "filename": "Sentinels2018.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.01100_print.jpg", "media_type": "Image", "alt_text": "The inner solar orbiting fleet.", "width": 1024, "height": 576, "pixels": 589824 } } ], "extra_data": {} }, { "id": 324686, "url": "https://svs.gsfc.nasa.gov/4360/#media_group_324686", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "

Solar Orbiting Fleet:

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Interstellar Fleet:

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In Surrey, England, where he grew up, the fields were brown and dry, and people tried to stay out of the Sun, indoors and televisions on. But for several days that month, his TV picture kept breaking up. “Do not adjust your set,” he recalls the BBC announcing. “Heat isn’t causing the interference. It’s sunspots.”The same sunspots that disrupted the television signals led to enormous solar flares — powerful bursts of radiation from the Sun — Aug. 4-7 that year. Between the Apollo 16 and 17 missions, the solar eruptions were a near miss for lunar explorers. Had they been in orbit or on the Moon’s surface, they would have sustained dangerous levels of solar radiation sparked by the eruptions. Today, the Apollo-era flares serve as a reminder of the threat of radiation exposure for technology and astronauts in space. Understanding and predicting solar eruptions is crucial for safe space exploration. Almost 50 years since those 1972 storms, the data, technology and resources available to NASA have improved, enabling advancements towards space weather forecasts and astronaut protection — key to NASA’s Artemis program to return astronauts to the Moon.Read more on NASA.gov. || ", "release_date": "2019-08-07T11:30:00-04:00", "update_date": "2023-05-03T13:45:43.534333-04:00", "main_image": { "id": 393941, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013200/a013275/13275_AstronautRadiation_Twitter.01205_print.jpg", "filename": "13275_AstronautRadiation_Twitter.01205_print.jpg", "media_type": "Image", "alt_text": "Watch this video on the NASA Goddard YouTube channel.Complete transcript available.Music credits: “Boreal Moment” by Benoit Scarwell [SACEM]; “Sensory Questioning”, “Natural Time Cycles”, “Emerging Designer”, and “Experimental Design” by Laurent Dury [SACEM]; “Superluminal” by Lee Groves [PRS], Peter George Marett [PRS] from Killer Tracks", "width": 1024, "height": 576, "pixels": 589824 } }, { "id": 13143, "url": "https://svs.gsfc.nasa.gov/13143/", "page_type": "Produced Video", "title": "NASA's Mission Through Dangerous Space Is Going Out in Style", "description": "B-roll for Van Allen Probe Live Shot. Answers the following suggested questions: You may think space is empty, but there is a lot there that we can’t see. What are space weather and radiation belts?How do you observe the radiation belts?A new radiation belt was discovered several years ago. Tell us about that discovery.Can you tell us about the final mission that the Van Allen probes are going on?How do radiation belts affect space travel, astronauts and the space station?Where can we learn more? || broll.00001_print.jpg (1024x576) [114.9 KB] || broll.00001_print_print.jpg (1024x576) [66.2 KB] || broll.00001_print_searchweb.png (320x180) [95.8 KB] || broll.00001_print_thm.png (80x40) [7.7 KB] || broll.mov (1280x720) [2.8 GB] || broll.webm (1280x720) [21.1 MB] || broll.mp4 (1280x720) [212.1 MB] || ", "release_date": "2019-02-11T21:00:00-05:00", "update_date": "2023-05-03T13:46:08.137981-04:00", "main_image": { "id": 397551, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013100/a013143/broll.00001_print.jpg", "filename": "broll.00001_print.jpg", "media_type": "Image", "alt_text": "B-roll for Van Allen Probe Live Shot. Answers the following suggested questions: You may think space is empty, but there is a lot there that we can’t see. What are space weather and radiation belts?How do you observe the radiation belts?A new radiation belt was discovered several years ago. Tell us about that discovery.Can you tell us about the final mission that the Van Allen probes are going on?How do radiation belts affect space travel, astronauts and the space station?Where can we learn more?", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [ { "id": 4822, "url": "https://svs.gsfc.nasa.gov/4822/", "page_type": "Visualization", "title": "Heliophysics Sentinels 2020", "description": "There have been few changes since the 2018 Heliophysics Fleet. Van Allen Probes and SORCE have been decommissioned, while Solar Orbiter, ICON and SET have been added. As of spring 2020, here's a tour of the NASA Heliophysics fleet from the near-Earth satellites out to the Voyagers beyond the heliopause.Excepting the Voyager missions, the satellite orbits are color coded for their observing program:Magenta: TIM (Thermosphere, Ionosphere, Mesosphere) observationsYellow: solar observations and imageryCyan: Geospace and magnetosphereViolet: Heliospheric observations || ", "release_date": "2020-09-15T10:00:00-04:00", "update_date": "2024-01-25T00:13:17.254423-05:00", "main_image": { "id": 382681, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004800/a004822/Sentinels2020.InnerSolarSystem.GSE.AU.clockSlate_EarthTarget.HD1080i.01500_print.jpg", "filename": "Sentinels2020.InnerSolarSystem.GSE.AU.clockSlate_EarthTarget.HD1080i.01500_print.jpg", "media_type": "Image", "alt_text": "This visualization presents orbits of the current heliophysics satellites covering the space near Earth, out to the Sun-Earth Lagrange point, L1, and finally a view of the current missions operating in the inner solar system.", "width": 1024, "height": 576, "pixels": 589824 } } ], "older_versions": [ { "id": 4589, "url": "https://svs.gsfc.nasa.gov/4589/", "page_type": "Visualization", "title": "Heliophysics Sentinels 2017", "description": "This visualization starts from near Earth and the Earth orbiting satellite fleet out to the Moon, then past the Sun-Earth Lagrange point 1 to out beyond the heliopause. This is the long-play version. || Sentinels2017.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.00000_print.jpg (1024x576) [136.1 KB] || Sentinels2017.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.00000_searchweb.png (320x180) [84.6 KB] || Sentinels2017.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.00000_thm.png (80x40) [6.0 KB] || Sentinels2017.Sentinels2Voyager.HD1080i_p30.mp4 (1920x1080) [111.6 MB] || Sentinels2017.Sentinels2Voyager.HD1080i_p30.webm (1920x1080) [12.4 MB] || frames/1920x1080_16x9_30p/SlowPlay/ (1920x1080) [512.0 KB] || Sentinels2017.Sentinels2Voyager_2160p30.mp4 (3840x2160) [336.2 MB] || frames/3840x2160_16x9_30p/SlowPlay/ (3840x2160) [512.0 KB] || ", "release_date": "2017-10-25T10:00:00-04:00", "update_date": "2023-11-15T00:11:13.973287-05:00", "main_image": { "id": 410404, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004500/a004589/Sentinels2017.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.00000_print.jpg", "filename": "Sentinels2017.Sentinels2Voyager.GSE.AU.clockSlate_EarthTarget.UHD3840.00000_print.jpg", "media_type": "Image", "alt_text": "This visualization starts from near Earth and the Earth orbiting satellite fleet out to the Moon, then past the Sun-Earth Lagrange point 1 to out beyond the heliopause. This is the long-play version.", "width": 1024, "height": 576, "pixels": 589824 } } ], "alternate_versions": [] }