High-flying NASA aircraft instruments simulate future satellite images over Hawaiian volcanoes
If you’re on Oahu and notice an unusual airplane landing and taking off from the Kaneohe Bay Marine Corps Base, you might be seeing NASA’s ER-2 aircraft.
This aircraft is a modified U-2 reconnaissance plane designed to collect scientific data at high altitudes. These data will help scientists calibrate, validate, and simulate remote sensing data from future satellites that will eventually orbit the Earth at even higher altitudes. “Remote sensing” refers to the use of imaging technology that allows us to see the world in a new light, from a remote and unique vantage point.
From late January through February, NASA is conducting this high-altitude airborne remote sensing data collection campaign over Hawaii. Several NASA-funded, multi-year projects will use these data to study coral reefs and volcanic processes.
The data will also be used to help develop a future Earth observing satellite instrument called the Hyperspectral Infrared Imager (HyspIRI). If funded, HyspIRI will be a global mission that will provide crucial information for studying the world’s ecosystems, as well as natural hazard events, such as volcanic eruptions, wildfires and drought.
To replicate the characteristics of data collected by Earth observing sensors aboard orbiting satellites, the ER-2 will cruise at an altitude of about 65,000 feet (above 95 percent of Earth’s atmosphere) with a diverse suite of instruments. In its wing pods and under the fuselage, it carries the Airborne Visible Infrared Imaging Spectrometer (AVIRIS), the MODIS-ASTER Airborne Simulator (MASTER), and the Hyperspectral Thermal Emission Spectrometer (HyTES).
These instruments are designed to measure reflected and emitted radiation (light) in hundreds of distinct wavelengths, from the visible through the thermal infrared parts of the electromagnetic spectrum. Such data give us quantitative information about surface composition, texture, and temperature of the ground. This information, combined with field-based measurements, enables scientists to study a variety of atmospheric, geologic and ecological processes to better understand our natural environment and how our environment responds to human activities.
On Hawaii Island, with the support of USGS Hawaiian Volcano Observatory scientists and the National Park Service, research scientists from universities, NASA and the U.S. Geological Survey are conducting field work and collecting data. They are using these data to investigate (1) links between vegetation health and volcanic gas and thermal emissions; (2) volcanic thermal anomalies; (3) the composition and chemical evolution of volcanic gas plumes from Kilauea Volcano; and (4) active volcanic processes and hazards, such as surface lava flow activity.
The overarching goals of this mission and the related scientific research projects are to characterize key volcanic processes, such as the rate of magma ascent to the surface, the amount of lava being erupted per day at Kilauea, and interpretation of possible eruption precursors. Lessons learned should help scientists inform emergency response agencies and the public before, during and after future eruptions.
Specific questions that this mission will address include: How do volcanoes signal impending eruptions through changes in surface temperature, gas and aerosol emission rates, or health and extent of vegetation cover? How can we improve forecasts of volcanic activity? How can we mitigate the impacts of eruptions by remotely measuring surface temperature and volcanic gas emission rates?
This research, conducted in one of the best natural volcanic laboratories on Earth, will help us answer these questions, and ultimately extend this knowledge to the monitoring of other active volcanoes around the world.
Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and colleagues.
Volcano Activity Updates
Kilauea continues to erupt at its summit and East Rift Zone. This past week, the summit lava lake level varied between about 49-112 feet below the vent rim. The 61g flow was still active, with lava entering the ocean near Kamokuna and surface breakouts near Puu Oo. The 61g flows do not pose an immediate threat to nearby communities.
Mauna Loa is not erupting. During the past week, small-magnitude (up to magnitude 3.0) earthquakes continued, primarily beneath the upper Southwest Rift Zone and the Northeast Rift zone at depths less than 3 miles. A small number of earthquakes also occurred on the west flank of the volcano at depths above 8 miles. GPS measurements continue to show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone.
Three earthquakes were reported felt in Hawaii this past week. At 10:07 a.m. on Feb. 3, a magnitude-2.8 earthquake occurred 3 miles north of Mauna Loa’s summit at a depth of 6 miles, and at 12:41 a.m., a magnitude-3.4 earthquake occurred 8.6 mi southeast of Kilauea’s summit at a depth of 5 miles. At 12:08 a.m. on Feb. 6, a magnitude-3.0 earthquake occurred 42.9 miles southwest of Makena, Maui, at a depth of 27 miles.
Visit http://hvo.wr.usgs.gov for past Volcano Watch articles, Kilauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at (808) 967-8862 (Kilauea) or (808) 967-8866 (Mauna Loa); email questions to askHVO@usgs.gov.
Rules for posting comments
Comments posted below are from readers. In no way do they represent the view of Stephens Media LLC or this newspaper. This is a public forum.
Comments may be monitored for inappropriate content but the newspaper is under no obligation to do so. Comment posters are solely responsible under the Communications Decency Act for comments posted on this Web site. Stephens Media LLC is not liable for messages from third parties.
IP and email addresses of persons who post are not treated as confidential records and will be disclosed in response to valid legal process.
Do not post:
- Potentially libelous statements or damaging innuendo.
- Obscene, explicit, or racist language.
- Copyrighted materials of any sort without the express permission of the copyright holder.
- Personal attacks, insults or threats.
- The use of another person's real name to disguise your identity.
- Comments unrelated to the story.
If you believe that a commenter has not followed these guidelines, please click the FLAG icon below the comment.