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  • richardmitnick 1:24 pm on February 13, 2019 Permalink | Reply
    Tags: , , , , ExtremeTech, NASA Parker Solar Probe,   

    From ExtremeTech: “Solar Probe Begins Its Second Orbit of the Sun” 

    From ExtremeTech

    Jan 31, 2019
    Ryan Whitwam

    NASA Parker Solar Probe Plus named to honor Pioneering Physicist Eugene Parker

    NASA’s Parker solar surveyor became a record-setter at the beginning of its mission when it took the title of fastest spacecraft in history from the wildly successful New Horizons probe. It made history again a few weeks later by flying through the sun’s corona and beaming back data. Now, NASA reports that Parker has completed a full orbit of the sun, and it’s diving back for another pass.

    Parker entered full operational status on Jan. 1 with all systems operating normally. It has started relaying mountains of data via the Deep Space network — NASA says it has collected more than 17 gigabytes so far. Parker has collected so much data that it’ll take several more months to get all of it sent back. The data dump from the first orbit should be done just in time for Parker to dive into the sun’s corona again.

    NASA Deep Space Network

    In preparation for the upcoming solar pass, NASA is busily clearing space on the probe’s internal solid state drives. As data makes it back to Earth, NASA deletes the corresponding files on Parker. The spacecraft is also getting new navigational information, which NASA transmits one month at a time.

    NASA says it expects Parker to reach perihelion (the closest approach to the sun) on Apr. 4. This will be the second of 24 planned orbits that promise to advance our understanding of the sun. Parker’s mission has been in the works for years. NASA has long wanted to study the sun’s corona, but the technology to protect a probe was beyond our abilities until just recently. You’d probably expect the surface of the sun to be hotter than the space around it, but that’s not the case. The corona of ionized plasma surrounding the sun is around one million Kelvin, 300 times hotter than the surface.

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    See the full article here .

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    Please help promote STEM in your local schools.

    Stem Education Coalition

     
  • richardmitnick 3:30 pm on August 27, 2018 Permalink | Reply
    Tags: Johns Hopkins Applied Physics Laboratory, , NASA Parker Solar Probe, NASA Parker Solar Probe Energetic Particle Instrument-Hi (EPI-Hi) Caltech, Naval Research Laboratory,   

    From JPL-Caltech: “JPL Roles in NASA’s Sun-Bound Parker Solar Probe with JHUAPL and USNRL” 

    NASA JPL Banner

    [THIS POST IS DEDICATED TO JLT IN LA, I HOPE HE SEES IT.]

    From JPL-Caltech

    August 27, 2018
    DC Agle
    Jet Propulsion Laboratory, Pasadena, Calif.
    818-393-9011
    agle@jpl.nasa.gov

    JoAnna Wendel
    NASA Headquarters, Washington
    202-358-1003
    Joanna.r.wendel@nasa.gov

    Geoffrey Brown
    The Johns Hopkins Applied Physics Laboratory, Laurel, Maryland
    240-228-5618
    Geoffrey.Brown@jhuapl.edu

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    Illustration of NASA’s Parker Solar Probe approaching the Sun. Image Credit: NASA/Johns Hopkins APL/Steve Gribben

    The navigation for NASA’s Parker Solar Probe is led by the agency’s Jet Propulsion Laboratory in Pasadena, California, which also has a role in two of the spacecraft’s four onboard instrument suites. Parker Solar Probe will fly closer to the Sun than any previous spacecraft and through the solar corona itself.

    One instrument, called the Energetic Particle Instrument-Hi (EPI-Hi), will investigate the mysteries of high-speed solar particles that hurtle toward Earth at close to the speed of light.

    NASA Parker Solar Probe Energetic Particle Instrument-Hi (EPI-Hi) Caltech

    Observations by the Parker Solar Probe will lead to better predictions of space weather and address fundamental mysteries about the Sun’s dynamic corona. EPI-Hi is part of the Integrated Science Investigation of the Sun, led by Principal Investigator David McComas of Princeton University in New Jersey.


    This animation shows Parker Solar Probe flying through the solar corona and coronal mass ejections. The fields of view of the two WISPR telescopes are defined by the pyramid-shaped rays coming from WISPR instrument.

    When approaching the Sun, the spacecraft flies such that its heat shield is always facing the Sun to protect the instruments and spacecraft from the intense solar radiation. As it gets closer to the Sun, the solar panels are folded back behind the shield so that only the tips are exposed to sunlight. The animation also shows how WISPR uses the heat shield to block out the direct sunlight so it can view the corona, which is seen in reflected sunlight.

    “We will be exploring a region of space that has never before been visited,” said Mark Wiedenbeck, the lead investigator on the EPI-Hi instrument and a principal research scientist at JPL. “We have ideas about what will be found, but the most important results may well come from observations that are completely unexpected.”

    Of particular interest to the EPI-Hi team is the unsolved riddle of how a small fraction of the charged particles from the Sun reach near-light speeds. These particles, protons, electrons and heavy ions can reach Earth in less than an hour, creating space weather hazards to humans and hardware in space. Until now, scientists had been observing from a distance the effects of what is happening near the Sun. With the Parker Solar Probe now on its way to fly through the region where it is happening, scientists are confident they will obtain new clues and insight into the process.

    The EPI-Hi instrument consists of stacks of silicon detectors designed to snag high-speed particles and measure their energies. Some of the detectors are very thin, with the thinnest being about one-eighth the thickness of a standard sheet of paper. For the detectors to make the required measurements, the thickness of these detectors could vary by no more than one-hundredth the thickness of a sheet of paper.

    Another instrument on Parker Solar Probe — the Wide-Field Imager for Solar Probe Plus (WISPR) – is the only camera aboard the spacecraft.

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    The WISPR Instrument Module (WIM) and its subassemblies annotated schematic. Two telescopes cover the WISPR FOV: the Inner and Outer telescope. Three baffle systems (Forward, Interior, and Aperture Hood) provide stray light control. The CIE controls the two APS detectors. The Door Latch release is the only WISPR mechanism. The U.S. Naval Research Laboratory.

    It will take images of the Sun’s corona and inner heliosphere. The imager has two telescopes that will capture images of the solar wind, shock waves and other coronal structures as they approach and pass the spacecraft.WISPR provides a very wide field-of-view, extending from 13 degrees away from the center of the Sun to 108 degrees away.

    “If you saw the solar eclipse last August, you saw the Sun’s corona. That is our destination. WISPR will be taking images of the corona as it flies through it. The images will help us understand the morphology, velocity, acceleration and density of evolving solar wind structures when they are close to the Sun,” said JPL scientist Paulett Liewer, a member of the WISPR Science Team. The WISPR principal investigator is Russell Howard of the Naval Research Laboratory.

    In leading Parker’s navigation efforts, JPL is helping to implement the mission’s innovative trajectory, developed by the Johns Hopkins Applied Physics Laboratory, Laurel, Maryland, which built and operates the spacecraft for NASA. The Parker Solar Probe will use seven Venus flybys over nearly seven years to gradually shrink its orbit around the Sun, coming as close as 3.83 million miles (6.16 million kilometers) to the Sun, well within the orbit of Mercury and about seven times closer to the Sun than any spacecraft before.

    In addition, the Parker Solar Probe Observatory Scientist, Principal Investigator Marco Velli, a UCLA professor, holds a part-time appointment as Heliophysics Liaison to NASA at JPL.

    The Parker Solar Probe lifted off on Aug. 12, 2018, on a United Launch Alliance Delta IV Heavy rocket from Space Launch Complex-37 at Cape Canaveral Air Force Station in Florida. The mission’s findings will help researchers improve their forecasts of space weather events, which have the potential to damage satellites and harm astronauts on orbit, disrupt radio communications and, at their most severe, overwhelm power grids.

    EPI-Hi is managed for NASA by Caltech in collaboration with JPL, which is a division of Caltech. The Parker Solar Probe is part of NASA’s Living with a Star Program, or LWS, to explore aspects of the Sun-Earth system that directly affect life and society. LWS is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland, for the Heliophysics Division of NASA’s Science Mission Directorate in Washington. Johns Hopkins Applied Physics Laboratory manages the Parker Solar Probe mission for NASA.

    More information on Parker Solar Probe is available at:

    https://www.nasa.gov/content/goddard/parker-solar-probe

    http://parkersolarprobe.jhuapl.edu

    See the full article here .


    five-ways-keep-your-child-safe-school-shootings

    Please help promote STEM in your local schools.

    Stem Education Coalition

    NASA JPL Campus

    Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center located in the San Gabriel Valley area of Los Angeles County, California, United States. Although the facility has a Pasadena postal address, it is actually headquartered in the city of La Cañada Flintridge, on the northwest border of Pasadena. JPL is managed by the nearby California Institute of Technology (Caltech) for the National Aeronautics and Space Administration. The Laboratory’s primary function is the construction and operation of robotic planetary spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating NASA’s Deep Space Network.

    Caltech Logo

    NASA image

     
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