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05/24/2018

The Ka-band Glacier and Ice Surface Topography Interferometer (GLISTIN-A) is currently on deployment in Honolulu, HI to study the Kilauea volcano eruption.  The objective of this deployment is to use GLISTIN to detect changes in Kilauea’s topography associated with the new lava flows, with the goal of measuring the erupted volume as a function of time and ultimately the total volume of the event.  If successful, Principal Investigator Paul Lundgren and his colleagues at USGS plan to use the GLISTIN data to quantitatively evaluate their models for evolution of volcanic processes.  Here’s a NASA press release that highlight’s the research effort:

https://www.nasa.gov/feature/help-from-above-nasa-aids-kilauea-disaster-response-1

So far we have imaged the southeastern portion of the Big Island covering Kilauea summit and the east rift zone down to the coast on three different days: May 18, 19, and 21.  The data from May 18 & 19 were hand-delivered by Paul Lundgren to JPL on Sunday night where members of the processing team were waiting to start processing the data to determine if the radar has sufficient sensitivity to measure the topography changes associated with new lava flows. Within 24 hours we were able to generate some preliminary amplitude and height products that showed changes due to lava activities from May 18 to May 19.

The current plan is for GLISTIN to remain in Honolulu to make two more observations within the next week as volcano eruption continues to be active.

Figure of preliminary GLISTIN height differences (courtesy Paul Lundgren) showing new lava activities in Leilani Estates within the one day period.  The color represents height changes in meters.  Areas with intense orange and red experienced lava growth of a few meters whereas areas with bluish hue experienced “height loss,” likely due to lava flows toppling trees in the path.  This is really good news as we have demonstrated that the GLISTIN radar has sufficient sensitivity to measure topography changes associated with new lava flows!  Much work remains to be done to determine if scientists can extract the lava thickness from the DEM (digital elevation model) changes after accounting for tree height changes and measurement noise.

 

05/24/2018

OMG‘s Airborne eXpendable Conductivity, Temperature, and Depth (AXCTD):  Last week, the AXCTD team installed three adjustable attenuators into the distribution amplifier module.  With the attenuators installed, cables with the proper length could be ordered.  Early next week, the team expects all the required cables to be delivered and final bench testing can be started.

OMG’S GLISTIN-A Radar mission:  Last week, OMG’s GLISTIN-A team started processing OMG’s 2018 GLISTIN-A data.  Three lines were processed, including Jakboshavn glacier.

OMG’s GLISTIN-A processed radar data of Jakboshavn glacier from March 2018

The OMG science team is busy reviewing and comparing the 2018 Jakboshavn glacier radar data to previous OMG’s GLISTIN-A Radar data from 2016 and 2017.

05/03/2018

ASO completed April 2018 California snow surveys in the San Joaquin, Tuolumne, Merced, and Kings river basins last week.  The ASO team delivered data products for San Joaquin and Tuolumne within one week of completing data acquisition for each basin.  The snow depth, snow albedo, and snow water equivalent data from these surveys will be used by California Department of Water Resources and local water agencies to make key water supply decisions for the remainder of the year.

04/06/2018

The Airborne Snow Observatory completed a survey mission 30 March to 1 April to measure water content of snowpack in the Gunnison River basin in southern Colorado.  This data will be used by Colorado water resource managers to optimize storage and distribution of water for the upcoming summer months.

View of the Gunnison Basin from the ASO airplane just south of Aspen, CO

04/01/2018

OMG’S GLISTIN-A Radar mission:  OMG’s GLISTIN-A team is busy supporting the 2018 GLISTIN-A radar mission.  On 19 - 20 March, OMG’s GLISTIN-A radar flew over Western Greenland’s Glaciers from Thule Airforce Base.

OMG’ North Western science flight track below is from 19 March.

GLISTIN-A concluded 2018 OMG’s science mission on 20 March (Flight track plot shown)

OMG’s 2018 GLISTIN-A mission finished with GLISTIN-A radar, acquiring 84 of 84 science flight lines.

03/22/2018

OMG’S GLISTIN-A Radar mission:  OMG’s GLISTIN-A team is busy supporting the GLISTIN-A radar mission.  On 12 March, OMG’s GLISTIN-A radar flew over Eastern Greenland’s glaciers based from Keflavik, Iceland.

12 March flight track from Iceland

From 12-14 March, GILSITIN continued surveying Eastern Greenland.  On 15 March, the G3 flew to Thule Air Force Base, Greenland. On Friday, 16 March, GLISTIN-A radar acquired OMG science data over Eastern and Northern Greenland.

16 March OMG science flight track from Thule Air Force Base

03/22/2018

The Ka-band radar (GLISTIN-A) has successfully completed the Oceans Melting Greenland (OMG) deployment aboard the JSC G-III.  Kudos to the aircraft crew and radar team for an excellent job and the mission was completed two days ahead of schedule.  In all we acquired 81 science flight lines (100%) and 3 calibration lines over sea ice and preliminary assessment showed the radar data looked good.

03/16/2018

On 6 March, GLISTIN- A flew from Bangor, acquired radar data from 3 science flight lines, and landed at Kanger, Greenland.

On 7 March, GLISTIN-A flew 10 science flight lines and on 8 March, 12 science lines were flown. Sunday, 11 March was a down day for JSC crew change.  This week, OMG GLISTIN-A flew a total of 32 of 84 science flight lines

GLISTIN-A Flight track for 7 March

On Saturday, 10 March, GLISTIN-A flew from Kanger, Greenland, acquired 7 lines over Southern Greenland and landed at Keflavik, Iceland.

Flight track for 10 March

03/16/2018

The Ka-band radar (GLISTIN-A) is more than half way through its Oceans Melting Greenland (OMG) Greenland deployment aboard the JSC G-III.  So far we have acquired 50 out of 81 flight lines in 6 science flights.

02/16/2018

The following press release was issued on 2 February, 2018:

The NASA Langley Atmospheric Sciences Data Center (ASDC) and Jet Propulsion Laboratory (JPL) announce the public release of Version 001 of the Airborne Multiangle SpectroPolarimetric Imager (AirMSPI) Level 2 Cloud Droplet Size and Cloud Optical Depth Data Product for the ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) flight campaign.

AirMSPI flies in the nose of NASA's high-altitude ER-2 aircraft. The instrument was built by JPL and the University of Arizona under NASA’s Instrument Incubator and Airborne Instrument Technology Transition Programs, and is aimed primarily at remote sensing of the amounts and microphysical properties of aerosols and clouds.

The AirMSPI Level 2 Cloud Droplet Size and Cloud Optical Depth Data Product contains a droplet size distribution (DSD), parameterized by an effective radius (reff) and effective variance (veff) of a gamma size distribution, as well as a spatially resolved cloud optical depth (COD) at 470, 660 and 865 nm. These L2 products are derived from L1B2 radiometric and polarimetric data taken in the instrument's continuous sweep mode with 25 m spatial sampling. Along with the L2 products, their retrieval uncertainties are reported, as propagated from the relevant uncertainties in instrument radiometry and polarimetry. Files are distributed in NetCDF4 format.

This release of AirMPSI L2 data contains targets over ocean acquired in sweep mode during the ORACLES flight campaign, including the check-out and transit flights. ORACLES was based out of Walvis Bay, Namibia and focused on the South Atlantic Ocean off the coast of Namibia and Angola. AirMSPI L2 data were acquired from 3 August to 29 September, 2016. More details about the ORACLES campaign and AirMSPI participation can be found at https://espo.nasa.gov/oracles.

Information about these products, details about product quality, and mechanisms to access the data can be found under AirMSPI Data and Information at the ASDC website, https://eosweb.larc.nasa.gov/.

The Classic Airborne Visible and Infrared Imaging Spectrometer (AVIRIS-C) and Portable Remote Imaging Spectrometer (PRISM) are deployed with the NASA ER2 to Marine Corps Base Hawaii (MCBH) on the Island of Oahu.  The mission has conducted most of the flights for Coral Reefs targets and has had successful day/night ASTER underpasses for studying the volcano and volcanic gas plume. 

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