2021年10月21日SEG（美国勘探地球物理学家学会）邀请了GAG创始人Enders A. Robinson以及主要参与者Sven Treitel讨论了GAG的早期工作，并描述它的一些主要成就。

       麻省理工学院（MIT）地球物理分析小组（GAG）是美国石油和地球物理服务行业支持的最早的工业联盟（consortium）之一。从1952年到1957年，它的存在为后来成为现代地球物理数据处理奠定了基础。这群麻省理工学院的研究生首先由恩德斯·罗宾逊（Enders Robinson）指导，他们开发了一些最早的地震软件系统。它们的影响仍然可以在今天的地震资料数字处理系统中看到。

        GAG的研究受到麻省理工学院教授Norbert Wiener工作的强烈影响，他对时间序列分析的基本贡献使GAG能够利用他的想法研究勘探地震记录中的信号与噪声的分离。在第二次世界大战期间，维纳发展了基于最小二乘误差原理的离散（数字）滤波器理论。这个滤波器一直使用到今天，并以他的名字命名。该方法的早期试验是在几家赞助的石油公司提供的地震记录手工数字化后的地震道上进行。结果清楚地表明，早期成功地从混响海洋地震记录中提取了地震反射系数。

        虽然自二十世纪五十年代以来，当前的地震数据处理技术取得了巨大的进步，但GAG引入的联合体模式（consortium）被大量后来的学术团体所采用，其中一些至今仍然存在。一个典型的例子是由Jon Claerbout教授于70年代在斯坦福大学创建的斯坦福勘探项目，它将很快庆祝它的50岁生日。

Enders A. Robinson is the Maurice Ewing and J. L. Worzel Professor of Geophysics at Columbia University in New York City. Robinson gained international prominence in the early 1950s when he was the founder of the Geophysical Analysis Group (GAG) at MIT. GAG research lead to the digital revolution in geophysics a decade later. Robinson published more than 25 books on digital signal analysis, seismic data processing, and wavelet estimation. Robinson helped found Digicon in 1965; there he developed the first commercial programs for academic positions, including the McMan Distinguished Professor of Geophysics at the University of Tulsa. Robinson is the highest honored scientist in the field of geophysics, SEG’s RF award 1969, the EAEG’s CSch award 1969, and the IEEE’s DGFP award 1984. He was elected to the National Academy of Engineering in 1988. He is an honorary member of SEG and EAEG. In 1990–1991 he spent a sabbatical at the Department of Earth and Planetary Sciences at Harvard. In 1993 he became the Maurice Ewing and J. Lamar Worzel Professor of Geophysics at Columbia University. He retired as Professor Emeritus in 2000. A letter from George Rupp, President of Columbia University on 4 October 1999 states: “This reaffirmation of your importance to our scholarly community is not nearly adequate to recognize your extraordinary contributions to Columbia. I am allowed the pleasure of underscoring the central point: you are officially a permanent member of the Columbia community, even though in retirement.” Since then, Robinson has continued working in geophysics with the publication of books and papers. In 2000 Robinson was Alexander von Humboldt Visiting Scientist, Geophysical Institute, University of Karlsruhe, Germany. In 2001 he Invited Lecturer, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Trieste, Italy. In 2001 Robinson was awarded the Maurice Ewing Gold Medal of the Society of Exploration Geophysicists; in 2003 the Blaise Pascal Medal for Science and Technology by the European Academy of Sciences in Brussels, Belgium. In 2005 The International Astronomical Union (IAU), which acts as the internationally recognized authority for assigning designations to celestial bodies, named the asteroid Svenders discovered in 2001 in honor of Sven Treitel and Enders Robinson. In 2010 Robinson was awarded the Desiderius Erasmus Award of the European Association of Geoscientists and Engineers (EAGE) in recognition of his fundamental and lifelong contribution to geophysics.

Sven Treitel is a graduate of MIT, where he received his PhD in geophysics in 1958. From 1958 to 1960 he worked for Chevron in Cuba and then joined Amoco’s Research Center in Tulsa, OK. While at Amoco, he carried out investigations in seismic signal processing and in the numerical simulation of seismic wave propagation. For some twenty years he was a co-editor of Elsevier's Handbook of Geophysical Exploration series. With Enders Robinson, he wrote the book Geophysical Signal Analysis, published by Prentice Hall in 1980, and reissued by the Society of Exploration Geophysicists (SEG) in 2000. A more recent book, also co-authored with Enders Robinson, Digital Imaging and Deconvolution was issued by the SEG Press in 2008. Treitel has authored and co-authored more than 80 technical papers. In 1991 and again in 1993 he was a Visiting Professor in the Department of Earth, Atmospheric and Planetary Sciences at MIT. He retired from Amoco in 1993. In 1994 Treitel was awarded the German government’s Alexander von Humboldt Prize, which allowed him to spend a year in Germany as a Visiting Scholar at the University of Karlsruhe. He served as editor of GEOPHYSICS from 1995 to 1997. He is an Honorary Member of the SEG, of the EAGE, and of the Geophysical Societies of Houston and of Tulsa. He is a Fellow of the IEEE and of the AGU, and a member of AAAS and Sigma Xi. He is the recipient of the SEG Fessenden Medal (1969), of four SEG Best Paper Awards (1964, 1969, 1988, and 1995), of the EAGE's Conrad Schlumberger Award (1969), of the SEG’s Maurice Ewing Medal (1989), of the EAGE’s Erasmus Medal (2007), and of the American Geosciences Institute Marcus Milling Legendary Geoscientist Medal (2012. He has served as Distinguished Lecturer for the SEG (1982) and for the AAPG (1994). In 1997 he formed TriDekon, Inc., a geophysical consulting firm.

https://seg.org/Events/SEG-Live/session/the-mit-geophysical-analysis-group-and-its-influence-on-seismic-processing

https://eapsweb.mit.edu/news/2019/birth-of-digital-seismology-and-origins-of-erl