Sunday, August 26, 2018

NASA’s InSight Lander Passes Halfway Point to Mars


This artist's concept shows the InSight spacecraft, encapsulated in its aeroshell, as it cruises to Mars and Nov. 26, 2018 touchdown at Elysium Planitia.  Credits: NASA/JPL-Caltech
Ken Kremer  --   SpaceUpClose.com  --   24 August 2018

CAPE CANAVERAL, FL –  NASA's InSight lander marked a major milestone when it cruised past  the halfway point on its interplanetary voyage enroute to the Red Planet. on the agency’s unprecedented mission to elucidate the “vital signs” of the Red Planet.

NASA announced that the InSight spacecraft is healthy and reached the halfway point to Mars on Aug. 6. 

“All of its instruments have been tested and are working well,” NASA officials announced.

“As of Aug. 20, the spacecraft had covered 172 million miles (277 million kilometers) since its launch 107 days ago.”
The probe has another 98 days and another 129 million miles (208 million kilometers) to go before its planned touch down in Mars' Elysium Planitia region, where it will be the first mission to study the Red Planet's deep interior.

NASA’s Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) Mars mission launched on a United Launch Alliance Atlas V rocket in the dead of night at 7:05 a.m. EDT (4:05 am PDT) Saturday from Vandenberg Air Force Base, California.
This long-exposure image (24 seconds) was taken by Instrument Context Camera (ICC) of NASA’s InSight Mars lander. The image shows some of the interior features of the backshell that encapsulates the spacecraft. The backshell carries the parachute and several components used during later stages of entry, descent, and landing. Along with the heatshield, the backshell protects NASA’s InSight Mars lander during its commute to and entry into the Martian atmosphere. Credits: NASA/JPL-Caltech


Nearly 7 months after liftoff the landing is scheduled for Nov. 26, 2018 at Elysium Planitia at around 3 p.m. EST (noon PST).  The location is about 375 miles away from Gale Crater - where NASA's Curiosity rover landed in 2012. 

In the intervening time between launch and landing the team is checking out the spacecraft and science instruments as well as rehearsing and rechecking all the procedures for the critical ‘do or die’ landing day and the ‘6 Minutes of Terror’ involving all phases of Entry, Descent and Landing (EDL).

“InSight's seismometer, which will be used to detect quakes on Mars, received a clean bill of health on July 19. The SEIS instrument (Seismic Experiment for Interior Structure) is a six-sensor seismometer combining two types of sensors to measure ground motions over a wide range of frequencies. It will give scientists a window into Mars' internal activity,” NASA said in a statement.

"We did our final performance checks on July 19, which were successful," said Bruce Banerdt, principal investigator of InSight from NASA's Jet Propulsion Laboratory, Pasadena, California.

“The team also checked an instrument that will measure the amount of heat escaping from Mars. After being placed on the surface, InSight's Heat Flow and Physical Properties Package (HP3) instrument will use a self-hammering mechanical mole burrowing to a depth of 10 to 16 feet (3 to 5 meters). Measurements by sensors on the mole and on a science tether from the mole to the surface will yield the first precise determination of the amount of heat escaping from the planet's interior. The checkout consisted of powering on the main electronics for the instrument, performing checks of its instrument sensor elements, exercising some of the instrument's internal heaters, and reading out the stored settings in the electronics module.”

“The third of InSight's three main investigations -- Rotation and Interior Structure Experiment (RISE) -- uses the spacecraft's radio connection with Earth to assess perturbations of Mars' rotation axis. These measurements can provide information about the planet's core.”
Artist's rendering of the NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander on Mars launching on May 5, 2018 from Vandenberg Air Force Base, Calif .  Credits: NASA

The team has also checked out the landers cameras as well. They also used the Instrument Context Camera (ICC) to take a 24 second long long-exposure spacecraft selfie inside of the spacecraft's backshell.

"If you are an engineer on InSight, that first glimpse of the heat shield blanket, harness tie-downs and cover bolts is a very reassuring sight as it tells us our Instrument Context Camera is operating perfectly,” said InSight Project Manager Tom Hoffman from JPL.

“The next picture we plan to take with this camera will be of the surface of Mars."

If all goes as planned, the camera will take the first image of Elysium Planitia minutes after InSight touches down on Mars.

InSight is funded by NASA’s Discovery Program of low cost, focused science missions along with the science instrument funding contributions from France and Germany.

Watch for Ken’s continuing coverage of NASA, ULA, SpaceX, Boeing, Lockheed Martin, Orbital ATK and more space and mission reports direct from the Kennedy Space Center, Cape Canaveral Air Force Station, Florida and Wallops Flight Facility, Virginia.

Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news: www.kenkremer.com –www.spaceupclose.com – twitter @ken_kremer - ken at kenkremer.com


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