Photo Courtesy of NASA’s MAVEN Mission to Mars posts
The Second walk-in maneuver of the deep-dip campaign completed successfully
The second #MAVEN deep-dip maneuver was executed yesterday (Feb. 11, 2015), with a delta-v (∆V) of 0.6 m/sec., which lowered the periapsis of the spacecraft by another 4 km. The first maneuver was carried out on Tuesday (Feb. 10) and lowered the periapsis by about 20 km.
The MAVEN spacecraft now has a periapsis altitude of ~130 km, where Mars’ atmosphere has an estimated density of 2.0 kg/km³
With Thursday February 12th’s start of the deep-dip science measurements, the MAVEN team is one step closer to solving the mystery of #Mars‘ climate history. — at NASA Goddard Space Flight Center.
Post courtesy of
NASA’s MAVEN Mission to Mars
Photo from NASA’s MAVEN Mission to Mars Post
The #MAVEN navigation team has given the green light for today’s initial “walk down,” which will lower the periapsis of the spacecraft by about 20 km and begin a transition into an area of Mars’ upper atmosphere known as the “homopause.” This region of Mars’ atmosphere is about 30 times more dense than the area explored by MAVEN during its primary science mapping operations, with a density between 2.0 – 3.5 kg/km³.
The first maneuver of this initial “deep-dip” campaign will be carried out this afternoon (Feb. 10, 2015) and will lower the periapsis altitude to about 133 km. It is the first of three maneuvers that will “walk” the MAVEN spacecraft into the deep-dip density corridor.
Last week, mission operators successfully ran the full sequences for a “deep-dip demo,” which included everything except having the lower periapsis. The instruments were in their deep-dip modes and the spacecraft was in its deep-dip orientation for the test.
The first of five planned deep-dip campaigns will begin with a two-day “walk-down” into the target density corridor, which will be followed by five days with a periapsis in this corridor (~125 km), and then another two days of periapsis raising maneuvers to bring the spacecraft back into its nominal science mapping orbit.
For more information about MAVEN’s science mapping orbit, visit:
You can read more about Charlie and his work, and share your memories at the UC Berkeley Department of Physics Memorial page.
MAVEN’s primary mission includes five 5-day “deep-dip” campaigns, in which the periapsis (lowest point in the orbit) is lowered from about 93 miles (150 km) to about 77 miles (125 km). The first “deep dip” maneuver will begin on Tuesday, February 10, 2015, with a two-day “walk down” into the target density corridor of 2.0 – 3.5 kg/km3. The density of Mars’ atmosphere in the current science-mapping orbit is about 0.12 kg/km3.
At altitude of 77 miles (125 km), Mars’ atmosphere is around 30 times more dense than it is at MAVEN’s nominal science mapping periapsis of 93 miles (150 km). To accommodate for the increase in atmospheric density, the spacecraft’s solar panels are bent at a 20° angle, which shifts the center of air pressure away from the center of gravity, providing self-stabilization.
The “deep dip” campaigns will provide data from the boundary where Mars’ upper and lower atmospheres meet—also referred to as the “homopause”—enabling the spacecraft to sample the entire upper atmosphere of Mars for the first time.
Thanks to NASA’s MAVEN Mission to Mars
MAVEN’s Suite of Instruments to study the Atmosphere of Mars, photos courtesy of NASA’s MAVEN Mission to Mars
MAVEN’s path as it dips through the Atmosphere of Mars as part of the Deep Dip Campaign. Photo courtesy of NASA’s MAVEN Mission to Mars
The Solar Wind and its Interaction with Mars’ Ionosphere Illustration (not to scale) showing the ability of the upstream bow shock and the magnetic field induced in the ionosphere to push the solar wind around the planet. As a result, the solar wind should not hit the ionosphere directly or penetrate deeply into the upper atmosphere. MAVEN’s orbit early in the mission is shown schematically. (Image credit: NASA/GSFC)
The MAVEN Solar Wind Ion Analyzer (SWIA) is a part of the spacecraft’s Particles and Fields Package. SWIA measures the solar wind and magnetosheath proton flow around #Mars and constrains the nature of solar wind interactions with the upper atmosphere.
Jasper Halekas, Associate Professor in the Department of Physics and Astronomy at the University of Iowa, talks with Iowa Public Radio’s Ben Kieffer about the instrument and how it measures the constant stream of energy from the sun as it bombards Mars’ upper atmosphere.
To listen to the full interview, (Jasper’s segment covers about the first 15 minutes of the interview).
Learn more about the SWIA instrument.
Iowa Public Radio
The SWIA instrument measures the solar wind and ion density and velocity in the magnetosheath of Mars. (Courtesy UCB/SSL – Greg Dalton)
When NASA’s Pegasus rocket lifts off in June 2017, it will carry scientific equipment and technology that might help researchers better understand space variations that contribute to disruptions in communications equipment, radar and Global Positioning Systems here on Earth.
NASA’s Ionospheric Connection Explorer (ICON) mission will study what happens in Earth’s upper atmosphere and the connections to environmental conditions on the planet, says Thomas Immel, ICON mission lead with the University of California, Berkeley’s Space Sciences Laboratory.
Read more at SIGNAL Online
The real monster black hole is revealed in this new image from NASA’s Nuclear Spectroscopic Telescope Array of colliding galaxies Arp 299. In the center panel, the NuSTAR high-energy X-ray data appear in various colors overlaid on a visible-light image from NASA’s Hubble Space Telescope. Image Credit: NASA/JPL-Caltech/GSFC
Will the real monster black hole please stand up? A new high-energy X-ray image from Our NuSTAR Satellite has pinpointed the true monster of a galactic mashup. The image shows two colliding galaxies, collectively called Arp 299, located 134 million light-years away. Each of the galaxies has a supermassive black hole at its heart. More Details