Welcome to SESDA

  • Early Movies of Cassini's First Dive

Welcome to the Space and Earth Science Data Analysis (SESDA III) home page. SESDA III is the premier space and Earth science contract at NASA’s Goddard Space Flight Center, held by ADNET Systems, Inc. ADNET, Wyle and Telophase form TEAM ADNET.

Approximately 300 scientists and engineers provide vital support to NASA under the SESDA III contract. Watch this site for exciting SESDA III news, events and job opportunities.


ADNET Systems Inc. has been awarded the Space and Earth Science Data Analysis (SESDA-IV) contract by the National Aeronautics and Space Administration (NASA) to support the Goddard Space Flight Center (GSFC) in Greenbelt, Maryland. SESDA-IV is a five-year cost-plus fixed-fee contract with a total potential value of approximately $250 million.

Under SESDA-IV, ADNET will provide a broad range of services to support Earth and Space science research and development, data operations, as well as activities in information system technologies, engineering, and science communication, education and public outreach that enable the Sciences and Exploration Directorate to successfully carry out its science missions at the Goddard Space Flight Center (GSFC).

SESDA is the premier Space and Earth science contract at GSFC and this award represents the third straight time ADNET Systems has been selected for this prestigious contract. Over 300 scientists, engineers, and education outreach specialists support the SESDA contract through a broad range of science disciplines, including solar and space plasma physics, astrophysics and astronomy, planetary studies, atmospheric science and climatology, oceanography, land processes, geodynamics, and solid earth geographics. “All of us at ADNET are pleased and excited to continue our partnership with NASA and we are thrilled to be selected as the SESDA contractor for the third time.” said Ashok Jha, President and CEO of ADNET.

Read more about SESDA and ADNET Systems


Early Movies of Cassini’s First Dive

May 16, 2017

Still from Cassini’s ‘Porthole’ Movie of Saturn


In preparation for its grand finale plunge into Saturn in mid-September, 2017, the Cassini spacecraft has begun a series of orbits which bring it to within 5,000 miles of the planet’s cloud tops. Its new trajectory allows for the collection of exceptionally high resolution science data that hasn’t been possible since Cassini was first inserted into orbit in 2004. In particular, several movies taken April 26 have been created by the Cassini imaging team of the first, low altitude dive showing the north pole’s hexagonal-shaped jet stream and the spacecraft’s path along the planet’s surface. Future passes will include science and engineering data from the Composite Infrared Spectrometer (CIRS) using instrument command sequences created by Team ADNET/SESDA instrument operators and programmers.

SESDA Team Supports Successful Twin Rocket Launches

March 20, 2017

SESDA Team Supports Successful Twin Rocket Launches


SESDA personnel supported the successful launch of twin NASA sounding rockets from the Poker Flat Research Range north of Fairbanks, Alaska on March 2, 2017 into a strong auroral arc. The purpose of this rocket campaign is to study the driving conditions of neutral jets that flow in concert with auroral arcs. SESDA Engineers lead the design and fabrication of a new wire boom system that measures the electric field. This new wire boom system performed flawlessly. SESDA scientists will be heavily involved in the subsequent data analysis which promises to advance the understanding of the coupling between the upper atmosphere and the aurora.

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