HiRISE camera to attempt imaging Curiosity's descent to Mars
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The HiRISE camera crew on the Mars Reconnaissance Orbiter will attempt an audacious repeat performance of the image above, where the team was able to capture an amazing shot of the Phoenix lander descending on a parachute to land on Mars’ north polar region. Only this time it will try to focus on the Mars Science Laboratory’s Curiosity rover descending to touch down in Gale Crater. It will be all or nothing for the HiRISE team, as they get only one shot at taking what would likely be one of the most memorable images of the entire mission for MRO.
“We’re only making one attempt on MSL here,” Christian Schaller of the HiRISE team told Universe Today. “The EDL (Entry, Descent and Landing) image is set up so that as MSL is descending, MRO will be slewing the HiRISE field of view across the expected descent path. The plan is to capture MSL during the parachute phase of descent.”
Schaller is the software developer responsible for the primary planning tools the MRO and HiRISE targeting specialists and science team members use to plan their images.
Last December, when Universe Today learned of this probable imaging attempt, HiRISE Principal Investigator Alfred McEwen confirmed for us that, indeed, the team was working to make it happen. The preferred shot would be to “capture the rover hanging from the skycrane, but the timing may be difficult,” McEwen said.
It would take an impeccable – and fortuitous – sense of timing to get that shot, but since MSL’s EDL won’t happen on a precisely exact timetable, the HiRISE team will take their one shot and see what happens.
“We’ve been gradually updating the exact timing of the sequence over the past couple of weeks as the MSL navigation team, the MRO navigation team and the MRO flight engineering team refines that descent path and MRO slew,” Schaller said via email, “and we think we’ve pretty much got it nailed down at this point. I think it’s a real testament to NASA and its partners that we can even think about doing this.”
HiRISE will actually be taking two images, but the first is a “throwaway” warmup image taken about 50 minutes prior to MSL’s descent, designed to heat the camera’s electronics up to the preferred temperature for getting good image data.
“The warmup image we’re taking is a long-exposure throwaway that we’re taking on the night side of Mars,” Schaller explained. “It’s a 5,000 microsecond per line exposure, compared to a more typical 100 microsecond per line exposure during normal surface imaging. These warmup data will be useless, and we don’t even bother sending them back to Earth; we just dump them from the MRO filesystem once the exposure is complete.”
Schaller said the warmup image starts executing at 04:17 UTC/9:17 PM PDT. The real image starts executing at 05:09 UTC/10:09 PM PDT, centered on 10:16 PM as the time MSL and MRO navigation teams have determined MSL will pass through HiRISE’s field of view.
This image will be an approximately 500 microseconds per line exposure, to match the MRO’s slew rate.
Artist impression of MRO orbiting Mars. Credit: NASA
Mars Reconnaissance Orbiter's High Resolution Imaging Science Experiment (HiRISE) camera captured this image of Phoenix hanging from its parachute as it descended to the Martian surface. Credit: NASA/JPL/University of Arizona.
“We’re only making one attempt on MSL here,” Christian Schaller of the HiRISE team told Universe Today. “The EDL (Entry, Descent and Landing) image is set up so that as MSL is descending, MRO will be slewing the HiRISE field of view across the expected descent path. The plan is to capture MSL during the parachute phase of descent.”
Schaller is the software developer responsible for the primary planning tools the MRO and HiRISE targeting specialists and science team members use to plan their images.
Last December, when Universe Today learned of this probable imaging attempt, HiRISE Principal Investigator Alfred McEwen confirmed for us that, indeed, the team was working to make it happen. The preferred shot would be to “capture the rover hanging from the skycrane, but the timing may be difficult,” McEwen said.
It would take an impeccable – and fortuitous – sense of timing to get that shot, but since MSL’s EDL won’t happen on a precisely exact timetable, the HiRISE team will take their one shot and see what happens.
“We’ve been gradually updating the exact timing of the sequence over the past couple of weeks as the MSL navigation team, the MRO navigation team and the MRO flight engineering team refines that descent path and MRO slew,” Schaller said via email, “and we think we’ve pretty much got it nailed down at this point. I think it’s a real testament to NASA and its partners that we can even think about doing this.”
HiRISE will actually be taking two images, but the first is a “throwaway” warmup image taken about 50 minutes prior to MSL’s descent, designed to heat the camera’s electronics up to the preferred temperature for getting good image data.
“The warmup image we’re taking is a long-exposure throwaway that we’re taking on the night side of Mars,” Schaller explained. “It’s a 5,000 microsecond per line exposure, compared to a more typical 100 microsecond per line exposure during normal surface imaging. These warmup data will be useless, and we don’t even bother sending them back to Earth; we just dump them from the MRO filesystem once the exposure is complete.”
Schaller said the warmup image starts executing at 04:17 UTC/9:17 PM PDT. The real image starts executing at 05:09 UTC/10:09 PM PDT, centered on 10:16 PM as the time MSL and MRO navigation teams have determined MSL will pass through HiRISE’s field of view.
This image will be an approximately 500 microseconds per line exposure, to match the MRO’s slew rate.
Artist impression of MRO orbiting Mars. Credit: NASA
Mars Reconnaissance Orbiter's High Resolution Imaging Science Experiment (HiRISE) camera captured this image of Phoenix hanging from its parachute as it descended to the Martian surface. Credit: NASA/JPL/University of Arizona.
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