NASA is soliciting information to improve its understanding of the interest, capabilities, and Rough Order of Magnitude (ROM) estimates for planning the construction, deployment, and operation of the next generation Space Geodesy (SG) stations that will be part of the upcoming NASA’s Space Geodetic Network (SGN).
Mathematician Jan McGarry discusses the science and history of Satellite Laser Ranging (SLR), her role in developing the Next Generation Satellite Laser Ranging system, and her career at NASA's Goddard Space Flight Center.
The design and laboratory build of the new NGSLR Optical Bench has been completed. The new bench offers an improved optical layout, incorporates alignment lasers, and uses monitoring cameras for more efficient alignments.
Computer scientist Carey Noll talks about her job as manager of the Crustal Dynamics Data Information System (CDDIS), the applications of her work for various space geodesy techniques such as GPS, and her career at NASA's Goddard Space Flight Center.
A "leap" second, is being added to account for the fact that it is taking Earth longer and longer to complete one full turn. Scientists know this from VLBI measurements, which are also used in the time standard UT1.
VLBI was originally invented in the 1960s to take better pictures of quasars, but scientists soon found that if you threw the process in reverse, you could measure how the ground beneath the telescopes moves around, how long days really are, and how the Earth wobbles on its axis!