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AirGravity Science element: 

With good weather last week, OMG’s AirGravity contractor (Sander, or SGL) deployed to their new location (Kulusuk)  on the South East side of Greenland, and flew 1 science day last week.  SGL flew for a total of 9.5 flight hours. 

Images from South Eastern Greenland, SGL's GPS station, near Kulusuk


A NASA press release highlighting Dr. Cathleen Jones, her Louisiana State University and UCLA colleagues’ research on land subsidence in New Orleans and surrounding areas was published on May 16.  This study based on data acquired by UAVSAR between June 2009 and July 2012 observed the highly variable rates of sinking due to a combination of natural geologic and human-induced processes.  The highest rates of sinking were observed along the Mississippi River around major industrial areas in Norco and Michoud.  The study found that groundwater pumping and dewatering (surface water pumping to lower the water table to prevent standing water and soggy ground) were the primary contributors to regional subsidence.  The study results as well as more recent UAVSAR data will be used to improve models of subsidence for the Mississippi River Delta that decision makers use to inform planning, flood modeling, and response strategies, thus improving public safety.  The subsidence rates were illustrated in the graphics below.

Top: Subsidence rates around Norco, Louisiana, and the location of flood protection levees (white). Bottom: Location of water wells active in 2012, local industry and the Bonnet Carre Spillway. The highest subsidence forms a bowl within the major industry site to the south of the river.

Credits: NASA/JPL-Caltech, Esri


The Airborne Snow Observatory in Mammoth Lakes, CA completed a survey of Tuolumne Basin on May 9. Processing for that flight is underway. The processed data and snow products for the Conejos basin in CO were delivered to the Colorado Water Conservation Board and will be utilized in long term water forecasting.


AirGravity Science element:  With reasonable weather last week, OMG’s AirGravity contractor (Sander or SGL) flew 15 OMG flight lines, for a total of 25 flight hours. 


Last week, with reasonable weather, OMG’s AirGravity contractor (Sander Geophysics Ltd. -  SGL) flew 32 OMG flight lines, for a total of 28 flight hours. The flight track plot below, shows SGL flying over 4,039 kilometers, and completing the Alison and Upernavik survey areas.

OMG’s Western science area, flight track map

Alison Glacier


Last week, OMG’s AirGravity contractor (SGL) flew six OMG flight lines, for a total of 5.5 flight hours. The flight track plot below, shows SGL completing over 954 kilometers of 5,770 total kilometers planned, or 14 percent of the Cornell survey.


This past week, the ASO flight team completed surveys in the Rio Grande and Conejos basins in Colorado for the Colorado Water Conservation Board.

The ASO compute team finished processing the April 1 Tuolumne snow data products. It is a great improvement over the past two years of Mega drought conditions. In the image below you can compare the early April Snow Water Equivalent as calculated from ASO measurements in Thousands of Acre-Feed (TAF) over the past 4 years. 


The Airborne Snow Observatory team is in full swing for 2016 snow-melt data collections. The flight team surveyed Olympic National Park last week and has done the first two Tuolumne acquisitions. 


The GLISTIN-A radar aboard the JSC G-III aircraft has completed its two-week Greenland campaign for the Earth Venture Oceans Melting Greenland (OMG) mission.  The Ka-band single-pass interferometer, a sibling instrument of UAVSAR, made high resolution, high precision elevation measurements of Greenland’s coastal glaciers for the spring season.  


The L-band radar aboard the Armstrong G-III/C-20A is back in service since March 23.  We’ve been acquiring data in California, including the monthly Sacramento Delta levee monitoring, semi-annual San Andreas Fault monitoring, Baja California fault monitory, and landslide study in Slumgullion, Colorado.  Besides additional local flights for crustal deformation studies, this week we will be conducting three flights over Tuolumne River Basin to study snow accumulation with repeat-pass L-band interferometry.