Top: Artist's rendering of the MarCO CubeSats
Bottom: Artist's rendering of the InSight lander
|Names||Interior Exploration using Seismic Investigations, Geodesy and Heat Transport |
Geophysical Monitoring Station
|Mission type||Mars lander|
|Operator||NASA / JPL|
|Mission duration||Planned: 709 sols (728 days)|
Current: 18 sols (18 days) since landing
|Manufacturer||Lockheed Martin Space Systems|
|Launch mass||694 kg (1,530 lb)|
|Landing mass||358 kg (789 lb)|
|Dimensions||Deployed: 6.0 × 1.56 × 1.0 m (19.7 × 5.1 × 3.3 ft)-|
|Power||600 W, solar / Li-ion battery|
|Start of mission|
|Launch date||5 May 2018, 11:05UTC|
|Rocket||Atlas V 401|
|Launch site||Vandenberg SLC-3E|
|Contractor||United Launch Alliance|
|Landing date||26 November 2018, 19:52:59UTC|
|Landing site||Elysium Planitia|
|Flyby of Mars|
|Spacecraft component||Mars Cube One (MarCO)|
|Closest approach||26 November 2018, 19:52:59UTC|
|Distance||3,500 km (2,200 mi)|
The Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission is a robotic lander designed to study the deep interior of the planet Mars. It was manufactured by Lockheed Martin, is managed by NASA's Jet Propulsion Laboratory, and most payload instruments it carries were built by European agencies. The mission launched on 5 May 2018 at 11:05 UTC aboard an Atlas V-401 rocket and successfully landed at Elysium Planitia on Mars on 26 November 2018 at 19:52:59 UTC. InSight traveled 483 million km (300 million mi) during its journey.
InSight's objectives are to place a seismometer, called SEIS, on the surface of Mars to measure seismic activity and provide accurate 3D models of the planet's interior; and measure internal heat flow using a heat probe called HP3 to study Mars' early geological evolution. This could bring a new understanding of the Solar System's terrestrial planets – Mercury, Venus, Earth, Mars – and Earth's Moon.
The lander was originally planned for launch in March 2016. Following a persistent vacuum failure in the SEIS instrument prior to launch, with the 2016 launch window missed, InSight was returned to Lockheed Martin's facility in Denver, Colorado, for storage. NASA officials decided in March 2016 to delay launching InSight to May 2018. This allowed time for the seismometer issue to be fixed, although it increased the cost from the previous US$675 million to a total of US$830 million. By reusing technology from the Mars Phoenix lander, which successfully landed on Mars in 2008, mission costs and risks were reduced.
InSight was initially known as GEMS (Geophysical Monitoring Station), but its name was changed in early 2012 following a request by NASA. Out of 28 proposals from 2010, it was one of the three Discovery Program finalists receiving US$3 million in May 2011 to develop a detailed concept study. In August 2012, InSight was selected for development and launch. Managed by NASA's Jet Propulsion Laboratory (JPL) with participation from scientists from several countries, the mission was cost-capped at US$425 million, not including launch vehicle funding.
A persistent vacuum leak in the CNES-supplied seismometer known as the Seismic Experiment for Interior Structure (SEIS) led NASA to postpone the planned launch in March 2016 to May 2018. When InSight was delayed, the rest of the spacecraft was returned to Lockheed Martin's factory in Colorado for storage, and the Atlas V rocket intended to launch the spacecraft was reassigned to the WorldView-4 mission.
On 9 March 2016, NASA officials announced that InSight would be delayed until the 2018 launch window at an estimated cost of US$150 million. The spacecraft was rescheduled to launch on 5 May 2018 for a Mars landing on 26 November at 3 p.m. The flight plan remained unchanged with launch using an Atlas V rocket from Vandenberg Air Force Base in California. NASA's Jet Propulsion Laboratory was tasked with redesigning and building a new vacuum enclosure for the SEIS instrument, while CNES conducted instrument integration and testing.
On 22 November 2017 InSight completed testing in a thermal vacuum, also known as TVAC testing, where the spacecraft is put in simulated space conditions with reduced pressure and various thermal loads. On 23 January 2018, after a long storage, its solar panels were once again deployed and tested, and a second silicon chip containing 1.6 million names from the public was added to the lander.
On 28 February 2018, InSight was shipped via C-17 cargo aircraft from the Lockheed Martin Space Systems building in Denver to the Vandenberg Air Force Base in California in order to be integrated to the launch vehicle. The lander was launched on 5 May 2018 and arrived on Mars at approximately 19:54 UTC on 26 November 2018.
NASA noted the difficulty of building an interplanetary seismometer when the Viking 1 lander's seismometer did not deploy properly in 1976. The seismometer on both Viking spacecraft were mounted on the lander, which meant that it also picked up vibrations from various operations of the lander and from the wind. The seismometer readings were used to estimate a Martian geological crust thickness between 14 and 18 km (8.7 and 11.2 mi) at the Viking 2 lander site. The Viking 2 seismometer detected pressure from the Mars winds complementing the meteorology results. There was one candidate for a possible marsquake, although it was not confirmed due to the limitations of the design, especially due to interference from other sources like wind. The wind data did prove useful in its own right, and despite the limitations of the data, widespread and large marsquakes were not detected.
Radio Doppler measurements were taken with Viking and twenty years later with Mars Pathfinder, and in each case the axis of rotation of Mars was estimated. By combining this data the core size was constrained, because the change in axis of rotation over 20 years allowed a precession rate and from that the planet's moment of inertia to be estimated. InSight's measurements of crust thickness, mantle viscosity, core radius and density, and seismic activity should result in a three- to tenfold increase in accuracy compared to current data.
Seismometers were also left on the Moon from the Apollo 12, 14, 15 and 16 missions and provided many insights into lunar seismology, including the discovery of moonquakes. The Apollo seismic network, which was operated until 1977, detected at least 28 moonquakes up to 5.5 on the Richter scale.
On 26 November 2018, NASA reported that the InSight lander had landed successfully on Mars. A touchdown image was received, taken through a transparent lens cover, which was removed a few days later.
A few hours after landing later, NASA's 2001 Mars Odyssey orbiter relayed signals indicating that InSight's solar panels had successfully unfurled and are generating enough electrical power to recharge its batteries daily. Odyssey also relayed a pair of images showing InSight's landing site. More images will be taken in stereo pairs to create 3D images, allowing InSight to find the best places to place the heat probe and seismometer. Over the next few weeks, InSight will check health indicators and monitor both weather and temperature conditions at the landing site.
On 7 December 2018, NASA released an audio recording of wind on Mars. This was the first ever recording of Martian wind.
The InSight mission placed a single stationary lander on Mars to study its deep interior and address a fundamental issue of planetary and Solar System science: understanding the processes that shaped the rocky planets of the inner Solar System (including Earth) more than four billion years ago.
InSight's primary objective is to study the earliest evolutionary history of the processes that shaped Mars. By studying the size, thickness, density and overall structure of Mars' core, mantle and crust, as well as the rate at which heat escapes from the planet's interior, InSight will provide a glimpse into the evolutionary processes of all of the rocky planets in the inner Solar System. The rocky inner planets share a common ancestry that begins with a process called accretion. As the body increases in size, its interior heats up and evolves to become a terrestrial planet, containing a core, mantle and crust. Despite this common ancestry, each of the terrestrial planets is later shaped and molded through a poorly understood process called differentiation. InSight mission's goal is to improve the understanding of this process and, by extension, terrestrial evolution, by measuring the planetary building blocks shaped by this differentiation: a terrestrial planet's core, mantle and crust.
The mission will determine if there is any seismic activity, measure the rate of heat flow from the interior, estimate the size of Mars' core and whether the core is liquid or solid. This data would be the first of its kind for Mars. It is also expected that frequent meteor airbursts (10–200 detectable events per year for InSight) will provide additional seismo-acoustic signals to probe the interior of Mars. The mission's secondary objective is to conduct an in-depth study of geophysics, tectonic activity and the effect of meteorite impacts on Mars, which could provide knowledge about such processes on Earth. Measurements of crust thickness, mantle viscosity, core radius and density, and seismic activity should result in a three- to tenfold increase in accuracy compared to current data.
In terms of fundamental processes shaping planetary formation, it is thought that Mars contains the most in-depth and accurate historical record, because it is big enough to have undergone the earliest accretion and internal heating processes that shaped the terrestrial planets, but is small enough to have retained signs of those processes.
The lander will then begin its mission of observing Mars, which is expected to last for two years.
The mission further develops a design inherited from the 2008 Phoenix Mars lander. Because InSight is powered by solar panels, it landed near the equator to enable maximum power for a projected lifetime of two years (1 Martian year). The mission includes two relay microsatellites called Mars Cube One (MarCO) that launched with InSight but were flying in formation with InSight to Mars.
The MarCO were launched with InSight, but separated soon after reaching space.
InSight's lander payload has a total mass of 50 kg, including science instruments and support systems such as the Auxiliary Payload Sensor Suite, cameras, the instrument deployment system, and a laser retroreflector.
InSight will perform three major experiments using SEIS, HP3 and RISE. SEIS is a very sensitive seismometer, measuring vibrations; HP3 involves a burrowing probe to measure the thermal properties of the subsurface. RISE uses the radio communication equipment on the lander and on Earth to measure the overall movement of planet Mars that could reveal the size and density of its core.
The two relay 6U cubesats were part of the overall InSight program, and were launched at the same time as the lander but they were attached to the centaur upper stage (InSight's second stage in the launch). They were ejected from the stage after launch and coasted to Mars independent of the main InSight cruise stage with the lander.
|Wikinews has related news: NASA's InSight lander and MarCO craft launch in new mission to Mars|
The spacecraft was launched on 5 May 2018 at 11:05 UTC on an Atlas V 401 launch vehicle (AV-078) from Vandenberg Air Force Base Space Launch Complex 3-East. This was the first American interplanetary mission to launch from California.
The launch was managed by NASA's Launch Services Program. InSight was originally scheduled for launch on 4 March 2016 on an Atlas V 401 (4 meter fairing/zero (0) solid rocket boosters/single (1) engine Centaur) from Vandenberg Air Force Base in California, U.S., but was called off in December 2015 due to a vacuum leak on the SEIS instrument. The rescheduled launch window ran from 5 May to 8 June 2018.
The journey to Mars took 6.5 months across 484 million km (301 million mi) for a touchdown on 26 November. After a successful landing, a three-month-long deployment phase commenced as part of its two-year (a little more than one Martian year) prime mission.
After its launch from Earth on the 5th of May in 2018, it coasted through interplanetary space for 6.5 months traveling across 484 million km (301 million mi) for a touchdown on the 26th November in that year.
InSight cruise stage departed Earth at a speed of 6,200 miles per hour (10,000 kilometers per hour). The MarCo probes were ejected from the 2nd stage Centaur booster and traveled to Mars independent of the InSight cruise stage, but they were all launched together
During the cruise to Mars, the InSight cruise stage makes several course adjustments, and the first of these (TCM-1) took place on May 22, 2018. The cruise stage that carries the lander includes solar panels, antenna, star trackers, sun sensor, inertial measurement unit, and thrusters among its technologies.
The final course correction was November 25, 2018, the day before its touch down the next day.
As InSight's science goals are not related to any particular surface feature of Mars, potential landing sites were chosen on the basis of practicality. Candidate sites needed to be near the equator of Mars to provide sufficient sunlight for the solar panels year round, have a low elevation to allow for sufficient atmospheric braking during EDL, flat, relatively rock-free to reduce the probability of complications during landing, and soft enough terrain to allow the heat flow probe to penetrate well into the ground.
An optimal area that meets all these requirements is Elysium Planitia, so all 22 initial potential landing sites were located in this area. The only two other areas on the equator and at low elevation, Isidis Planitia and Valles Marineris, are too rocky. In addition, Valles Marineris has too steep a gradient to allow safe landing. In September 2013, the initial 22 potential landing sites were narrowed down to 4, and the Mars Reconnaissance Orbiter was then used to gain more information on each of the 4 potential sites before a final decision was made. Each site consists of a landing ellipse that measures about 130 by 27 km (81 by 17 mi).
In March 2017, scientists from the Jet Propulsion Laboratory announced that the landing site had been selected. It is located in western Elysium Planitia at . The landing site is about 600 km (370 mi) north from where the Curiosity rover is operating in Gale Crater.
On 26 November 2018, at approximately 19:53 UTC, mission controllers received a signal via the Mars Cube One (MarCO) satellites that the spacecraft had successfully touched down at Elysium Planitia. After landing, the mission will take three months to deploy and commission the geophysical science instruments. It will then begin its mission of observing Mars, which is planned to last for two years.
The mass that entered the atmosphere of Mars was 1,340 pounds (608 kilograms) .
There are three major stages to InSight's landing:
Surface operations summary, November 26, 2018 - Sol 1:
On its first day InSight's solar panels were unfurled and sent power to the electronics, setting a new solar power record of 4.6 kilowatt-hours generated for a single Martian Day (known as a "Sol"). This amount is enough to support operations and deploy the sensors.
On December 7, 2018 InSight recorded the sounds of Martian winds with SEIS, which is able to record vibrations within human hearing range, although rather low (aka subwoofer-type sounds), and these were sent back to Earth. This was the first time the sound of Mars wind was heard after two previous attempts.
The Mars Cube One (MarCO) spacecraft are a pair of 6U CubeSats that piggybacked with the InSight mission to test CubeSat navigation and endurance in deep space, and to help relay real-time communications (eight minute delay) during the probe's entry, descent and landing (EDL) phase. The two 6U CubeSats, named MarCO A and B, are identical. They measure 30 cm × 20 cm × 10 cm (11.8 in × 7.9 in × 3.9 in) and flew as a pair for redundancy. The two CubeSats separated from the cruise stage after launch, and flew their own trajectory to Mars while flanking the lander. They did not enter orbit, but flew past Mars during the EDL phase of the mission and relayed InSight's telemetry in real time.
The InSight science and engineering team includes scientists and engineers from many disciplines, countries and organizations. The science team assigned to InSight includes scientists from institutions in the U.S., France, Germany, Austria, Belgium, Canada, Japan, Switzerland, Spain, Poland and the United Kingdom.
Mars Exploration Rover project scientist W. Bruce Banerdt is the principal investigator for the InSight mission and the lead scientist for the SEIS instrument. Suzanne Smrekar, whose research focuses on the thermal evolution of planets and who has done extensive testing and development on instruments designed to measure the thermal properties and heat flow on other planets, is the lead for InSight's HP3 instrument. The Principal Investigator for RISE is William Folkner at JPL. The InSight mission team also includes project manager Tom Hoffman and deputy project manager Henry Stone.
Major contributing agencies and institutions:
As part of its public outreach, NASA organized a program where members of the public were able to have their names sent to Mars aboard InSight. Due to its launch delay, two rounds of sign-ups were conducted totaling 2.4 million names: 826,923 names were registered in 2015 and a further 1.6 million names were added in 2017. An electron beam was used to etch letters only 1⁄1000 the width of a human hair onto 8 mm (0.3 in) silicon wafers. The first chip was installed on the lander in November 2015 and the second on 23 January 2018.
InSight lander loaded on a Boeing C-17 Globemaster III (December 2015)
Some example from the Instrument Context Camera (ICC)
Jubilant NASA engineers cheered Monday as the $828 million InSight lander signaled a safe landing on Mars ...