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Two small NASA satellites will measure soil moisture, volcanic gases

May 3, 2024
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Two small NASA satellites will measure soil moisture, volcanic gases
NASA engineers Austin Tanner (left) and Manuel Vega stand beside SNoOPI, quick for Indicators of Alternative P-Band Investigation, on the NanoRacks clear room facility in Houston. Credit score: NASA / Denny Henry

Two NASA pathfinding missions had been lately deployed into low-Earth orbit, the place they’re demonstrating novel applied sciences for observing atmospheric gases, measuring freshwater, and even detecting indicators of potential volcanic eruptions.

The Indicators of Alternative P-Band Investigation (SNoOPI), a low-noise radio receiver, assessments a brand new approach for measuring root-zone soil moisture by harnessing radio indicators produced by industrial satellites—a giant job for a 6U CubeSat the dimensions of a shoebox.

Individually, the Hyperspectral Thermal Imager (HyTI) is measuring hint gases linked to volcanic eruptions. HyTI, additionally a 6U CubeSat, may pave the way in which for future missions devoted to detecting volcanic eruptions weeks or months prematurely.

Each devices had been launched on March 21 from NASA’S Cape Canaveral Area Power Station to the Worldwide Area Station aboard SpaceX’s Dragon cargo spacecraft as a part of the corporate’s thirtieth industrial resupply mission. On April 21, the devices had been launched into orbit from the station.

‘Flying ace’ for locating freshwater in soil and snow

As a measurement approach, “indicators of alternative attempt to reutilize what already exists,” mentioned James Garrison, professor of aeronautics and astronautics at Purdue College and principal investigator for SNoOPI.

Garrison and his group will attempt to acquire the P-band radio indicators produced by many industrial telecommunications satellites and repurpose them for science purposes. The instrument maximizes the worth of space-based belongings already in orbit, reworking current radio indicators into analysis instruments.






SNOOPI will prototype a brand new approach for measuring soil moisture. Credit score: NASA

“By what occurs when satellite tv for pc indicators mirror off the floor of the Earth and evaluating that to the sign that has not mirrored, we are able to extract necessary properties in regards to the floor the place the sign displays,” mentioned Garrison.

P-band radio indicators are highly effective, penetrating Earth’s floor to a depth of about one foot (30 cm). This makes them supreme for finding out root-zone soil moisture and snow water equal.

“By monitoring the quantity of water within the soil, we get a superb understanding of crop development. We are able to additionally extra intelligently monitor irrigation,” mentioned Garrison. “Equally, snow is essential as a result of that is additionally a spot the place water is saved. It has been laborious to measure precisely on a world scale with distant sensing.”

Excessive-time for HyTI and high-resolution thermal imaging

“I research volcanoes from area to attempt to work out when they are going to begin and cease erupting,” mentioned Robert Wright, director of the Hawaii Institute of Geophysics and Planetology on the College of Hawaiʻi at Mānoa and the principal investigator for HyTI.






HyTI, quick for Hyperspectral Thermal Imager, is testing a novel instrument for measuring thermal radiation. Credit score: NASA

Hyperspectral imagers like HyTI measure a broad spectrum of thermal radiation signatures, they usually’re notably helpful for characterizing gases in low concentrations. Wright and his group hope HyTI will assist them quantify concentrations of sulfur dioxide within the ambiance round volcanoes.

Weeks and even months earlier than they erupt, volcanoes usually emit elevated quantities of sulfur dioxide and different hint gases. Measuring these gases may point out an impending eruption HyTI’s sensitivity to thermal radiation will even be helpful for observing water vapor and convection.

“There are two science targets for HyTI. We wish to attempt to enhance how we are able to predict when a volcano will erupt and when a volcanic eruption goes to finish,” mentioned Wright. “And we’re additionally going to be measuring soil moisture content material because it pertains to drought.”

Via its Earth Science Expertise Workplace (ESTO), NASA labored intently with each Garrison and Wright to assist remodel their analysis into fully-functioning, space-ready prototypes.

“The ESTO program permits for scientists to have attention-grabbing concepts and really flip them into actuality,” mentioned Wright. Garrison agreed. “ESTO’s been a fantastic associate.”

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Two small NASA satellites will measure soil moisture, volcanic gases (2024, Could 2)
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