Soon after NASA's Europa Clipper spacecraft launched toward Jupiter's icy moon on Oct. 14, 2024, the mission team powered on each of the science instruments for a series of test or "checkout" activities. The Europa Imaging System – with its narrow-angle and wide-angle cameras – underwent its first checkouts in December 2024.Each camera has a cover to protect its sensitive detectors from the Sun while the spacecraft moves through the inner solar system, so the test images only show low-level variations in the sensitivity of the detector system. This image, taken by the narrow-angle camera (or NAC), has been enhanced to show more subtle variations in brightness. The pattern shown here matched similar test images taken before launch, confirming the camera is working as expected.The large, 8-megapixel detectors are divided into 16 sections to capture data quickly during the very fast, low-altitude flybys of Europa. Each section has a slightly different background brightness level, which gives it the image a striped appearance. Images like this are used to correct the background pattern in science observations.Instrument scientists and engineers at the Johns Hopkins Applied Physics Laboratory (APL), where the camera was designed and built, will use images like this to calibrate the science imagery it eventually gathers above Europa. The team also, for the first time in flight, moved the gimbal that will allow the NAC to target specific locations on Europa.In 2027, the spacecraft will be far enough from the Sun to safely open the lens covers and capture the first images, which will of starfields until arrival at the Jupiter system in 2030.
On its recent swing by Mars, NASA’s Europa Clipper took the opportunity to capture infrared images of the Red Planet. The data will help mission scientists calibrate the spacecraft’s thermal imaging instrument so they can be sure it’s operating correctly when Europa Clipper arrives at the Jupiter system in 2030.The mission’s sights are set on Jupiter’s moon Europa and the global ocean hidden under its icy surface. A year after slipping into orbit around Jupiter, Europa Clipper will begin a series of 49 close flybys of the moon to investigate whether it holds conditions suitable for life.A key element of that investigation will be thermal imaging — global scans of Europa that map temperatures to shed light on how active the surface is. Infrared imaging will reveal how much heat is being emitted from the moon; warmer areas of the ice give off more energy and indicate recent activity.The imaging also will tell scientists where the ocean is closest to the surface. Europa is crisscrossed by dramatic ridges and fractures, which scientists believe are caused by ocean convection pulling apart the icy crust and water rising up to fill the gaps.“We want to measure the temperature of those features,” said Arizona State University’s Phil Christensen, principal investigator of Europa Clipper’s infrared camera, called the Europa Thermal Imaging System (E-THEMIS). “If Europa is a really active place, those fractures will be warmer than the surrounding ice where the ocean comes close to the surface. Or if water erupted onto the surface hundreds to thousands of years ago, then those surfaces could still be relatively warm.”Why MarsOn March 1, Europa Clipper flew just 550 miles (884 kilometers) above the surface of Mars in order to use the planet’s gravitational pull to reshape the spacecraft’s trajectory. Ultimately, the assist will get the mission to Jupiter faster than if it made a beeline for the gas giant, but the flyby also offered a critical opportunity for Europa Clipper to test E-THEMIS.For about 18 minutes on March 1, the instrument captured one image per second, yielding more than a thousand grayscale pictures that were transmitted to Earth starting on May 5. After compiling these images into a global snapshot of Mars, scientists applied color, using hues with familiar associations: Warm areas are depicted in red, while colder areas are shown as blue.By comparing E-THEMIS images with those made from established Mars data, scientists can judge how well the instrument is working.“We wanted no surprises in these new images,” Christensen said. “The goal was to capture imagery of a planetary body we know extraordinarily well and make sure the dataset looks exactly the way it should, based on 20 years of instruments documenting Mars.”NASA’s Mars Odyssey orbiter, launched in 2001, carries a sister instrument named THEMIS that has been capturing its own thermal images of the Red Planet for decades. To be extra thorough, the Odyssey team collected thermal images of Mars before, during, and after Europa Clipper’s flyby so that Europa scientists can compare the visuals as an additional gauge of how well E-THEMIS is calibrated.Europa Clipper also took advantage of the close proximity to Mars to test all the components of its radar instrument in unison for the first time. The radar antennas and the wavelengths they produce are so long that it wasn’t possible for engineers to can do that in a clean room before launch. The radar data will be returned and analyzed in the coming weeks and months, but preliminary assessments of the real-time telemetry indicate that the test went well.To leverage the flyby even further, the science team took the opportunity to ensure that the spacecraft’s telecommunication equipment will be able to conduct gravity experiments at Europa. By transmitting signals to Earth while passing through Mars’ gravity field, they were able to confirm that a similar operation is expected to work at Europa.
Ganymede Impact:– 14:00:55 LST– 166º E, 29º N– Impact in view of Earth– 45 days after E53– Impact velocity: 6.7 km/s
Europa Clipper Updates [Jan 7]Quote • Perseverance will try and get an image of the spacecraft flying over
• Perseverance will try and get an image of the spacecraft flying over
Quote from: StraumliBlight on 01/18/2025 04:29 pmEuropa Clipper Updates [Jan 7]Quote • Perseverance will try and get an image of the spacecraft flying overDid this actually happen? A brief internet search didn't yield anything.
I didn't realise the rover had that capability. I know MRO has imaged other spacecraft.
AWST Orion Tops GAO Roundup Of NASA’s Biggest Cost Overruns[Irene Klotz, Jul 1, complementary through Jul 10]
Europa Clipper, which launched in October 2024 following resolution of radiation-hardening issues and deferred software development that drove a $50.7 million overrun.
As it soared past Mars in March, NASA’s Europa Clipper conducted a critical radar test that had been impossible to accomplish on Earth. Now that mission scientists have studied the full stream of data, they can declare success: The radar performed just as expected, bouncing and receiving signals off the region around Mars’ equator without a hitch.Called REASON (Radar for Europa Assessment and Sounding: Ocean to Near-surface), the radar instrument will “see” into Europa’s icy shell, which may have pockets of water inside. The radar may even be able to detect the ocean beneath the shell of Jupiter’s fourth-largest moon.“We got everything out of the flyby that we dreamed,” said Don Blankenship, principal investigator of the radar instrument, of the University of Texas at Austin. “The goal was to determine the radar’s readiness for the Europa mission, and it worked. Every part of the instrument proved itself to do exactly what we intended.”The radar will help scientists understand how the ice may capture materials from the ocean and transfer them to the surface of the moon. Above ground, the instrument will help to study elements of Europa’s topography, such as ridges, so scientists can examine how they relate to features that REASON images beneath the surface.Limits of EarthEuropa Clipper has an unusual radar setup for an interplanetary spacecraft: REASON uses two pairs of slender antennas that jut out from the solar arrays, spanning a distance of about 58 feet (17.6 meters). Those arrays themselves are huge — from tip to tip, the size of a basketball court — so they can catch as much light as possible at Europa, which gets about 1/25th the sunlight as Earth.The instrument team conducted all the testing that was possible prior to the spacecraft’s launch from NASA’s Kennedy Space Center in Florida on Oct. 14, 2024. During development, engineers at the agency’s Jet Propulsion Laboratory in Southern California even took the work outdoors, using open-air towers on a plateau above JPL to stretch out and test engineering models of the instrument’s spindly high-frequency and more compact very-high-frequency antennas.But once the actual flight hardware was built, it needed to be kept sterile and could be tested only in an enclosed area. Engineers used the giant High Bay 1 clean room at JPL, where the spacecraft was assembled, to test the instrument piece by piece. To test the “echo,” or the bounceback of REASON’s signals, however, they’d have needed a chamber about 250 feet (76 meters) long — nearly three-quarters the length of a football field.Enter MarsThe mission’s primary goal in flying by Mars on March 1, less than five months after launch, was to use the planet’s gravitational pull to reshape the spacecraft’s trajectory. But it also presented opportunities to calibrate the spacecraft’s infrared camera and perform a dry run of the radar instrument over terrain NASA scientists have been studying for decades.As Europa Clipper zipped by the volcanic plains of the Red Planet — starting at 3,100 miles (5,000 kilometers) down to 550 miles (884 kilometers) above the surface — REASON sent and received radio waves for about 40 minutes. In comparison, at Europa the instrument will operate as close as 16 miles (25 kilometers) from the moon’s surface.All told, engineers were able to collect 60 gigabytes of rich data from the instrument. Almost immediately, they could tell REASON was working well. The flight team scheduled the full dataset to download, starting in mid-May. Scientists relished the opportunity over the next couple of months to examine the information in detail and compare notes.“The engineers were excited that their test worked so perfectly,” said JPL’s Trina Ray, Europa Clipper deputy science manager. “All of us who had worked so hard to make this test happen — and the scientists seeing the data for the first time — were ecstatic, saying, ‘Oh, look at this! Oh, look at that!’ Now, the science team is getting a head start on learning how to process the data and understand the instrument’s behavior compared to models. They are exercising those muscles just like they will out at Europa.”Europa Clipper’s total journey to reach the icy moon will be about 1.8 billion miles (2.9 billion kilometers) and includes one more gravity assist — using Earth — in 2026. The spacecraft is currently about 280 million miles (450 million kilometers) from Earth.
https://www.nasa.gov/missions/europa-clipper/nasas-europa-clipper-radar-instrument-proves-itself-at-mars/ [Aug 1]QuoteAs it soared past Mars in March, NASA’s Europa Clipper conducted a critical radar test that had been impossible to accomplish on Earth. Now that mission scientists have studied the full stream of data, they can declare success: The radar performed just as expected, bouncing and receiving signals off the region around Mars’ equator without a hitch.{snip}URL for NASA blog corrected
As it soared past Mars in March, NASA’s Europa Clipper conducted a critical radar test that had been impossible to accomplish on Earth. Now that mission scientists have studied the full stream of data, they can declare success: The radar performed just as expected, bouncing and receiving signals off the region around Mars’ equator without a hitch.{snip}
Spacecraft Status: • The spacecraft remains healthy and stable • Started its return to Earth for Dec. 2026 Earth Gravity Assist • Nominal attitude is Earth pointed on reaction wheel control and Ka-band downlink via High-Gain AntennaKey Spacecraft Activities: • Completed planned calibration activities and periodic check outs for the science instruments • Completed the flight software 10.5 upload and installation — a major flight software update identified before launch • Radiation Monitor (Radmon) and Canary Box engineering systems have been checked out and powered on • Completed spacecraft self-compatibility testing, focusing on REASON, ECM, and PIMS • Additional check-outs and self-compatibility tests will be performed primarily as instrument covers are opened and decontamination periods are completed
