IN FOCUS: The History of IEEE GRSS at 65: 1970-74
By Joanne Van Voorhis
The IEEE Geoscience and Remote Sensing Society (GRSS) marks its 65th anniversary in 2026. We continue our 12-part series this month by examining the events and contributors from 1970-1974, and explore the challenges and adjustments seen during this period.
Part III – Challenges and Redefinition (1970-1974)
The early 1970s brought a period of uncertainty for the Group on Geoscience Electronics (G-GE), which was working hard to maintain activity, publications, and community events, but also struggling with challenges. The community that would ultimately become the IEEE Geoscience and Remote Sensing Society began redefining itself, expanding its scientific scope, and laying the foundation for long-term growth and stability.
Symposium Challenges and the “Magnuson Mandate”
In April 1970, G-GE held its Second International Geoscience Electronics Symposium in Washington, D.C., which was considered both a technical and financial success. Attendance was solid, industry and government participation was visible, and the event enhanced the group’s reputation. A notable highlight was a keynote address by U.S. Senator Warren G. Magnuson, who called for the creation of a World Environment Institute to provide an international, interdisciplinary approach to global environmental problems. Magnuson challenged those present to stop viewing geoscience as a purely theoretical or industrial pursuit and to start viewing it as a tool for “global survival.” As a result of his suggestion, a G-GE team composed of Enrico Mercanti, Mace Miyasaki, and Ed Wolff began a survey of the world’s environmental community and possible implementation of a World Environment and Resources Council (WERC). Although WERC itself did not become a lasting entity, its proposal is historically important because it reflected the early integration of engineering, environmental science, and policy, demonstrated the growing relevance of electronic sensing and geoscience instrumentation to global environmental monitoring, and marked a moment when the IEEE G-GE community was actively engaging with broader societal and global environmental challenges.
In marked contrast, the Third International Geoscience Electronics Symposium, held August 25-27, 1971, again in Washington, D.C., experienced a drastic decline in participation. Both the number of technical papers and the attendance declined significantly. There were only about 150 participants, substantially fewer than were needed for the meeting to be a financial success. However, the “failure” of the event eventually served as a catalyst for a more sustainable model, leading to the first International Geoscience and Remote Sensing Symposium (IGARSS) a decade later.
Economic and Industry Pressures
The 1970-1974 period was indeed a challenging era for the IEEE Geoscience Electronics Group (G-GE). The struggles of the 1971 symposium weren’t isolated incidents but were symptoms of broader economic and industrial shifts. The late 1960s and early 1970s saw a dramatic contraction in U.S. government spending as the Apollo program wound down and military procurement for the Vietnam War began to shift. This era saw some of the highest unemployment rates for electrical engineers in history. Tens of thousands of engineers in the aerospace and electronics sectors — core constituents of the G-GE — lost their jobs. And, while it had been previously commonplace for larger companies and aerospace firms to pay for their engineers’ IEEE dues and travel expenses, these subsidies were among the first perks to be cut as budgets tightened. Inflation also had an impact as G-GE annual dues increased by 25% (to $5.00) in 1969. Membership grew steadily through most of the 1960s, reaching a peak of 1,757 in 1970. However, over the next four years G-GE lost more than 500 members and by 1974 membership had declined to 1,242.
Internal Consolidation Pressures
At the same time, IEEE was consolidating its numerous small technical groups into larger societies. G-GE, with its modest membership and narrow financial base, was viewed by some as a candidate for merger. G-GE was the second or third smallest group in the IEEE at the time and proposals were floated to integrate G-GE into the Aerospace and Electronic Systems Society. G-GE successfully resisted the IEEE consolidation movement by transforming itself into a more multidisciplinary organization. The group also found alternatives to the International Geoscience Electronics Symposium by holding joint sessions at larger conferences like INTERCON (the IEEE International Convention) and the Offshore Technology Conference (OTC) to bolster attendance, improve visibility and encourage membership.
Charles F. Getman, Chairman of the GE-AdCom in 1973, published a statement highlighting the Group’s expanding scope in the Chairman’s Message in IEEE Transactions on Geoscience Electronics, Vol. GE-11, No. 1, Jan. 1973:
“Traditionally the geophysical environment that has concerned the group has included the earth, water, atmosphere, and more recently, space. The interest has been focused on the instrumentation systems needed to understand these environments. By systems we mean all the electronics from the sensors to the data display devices. This includes all the various sub-systems and components without which a complete system could not be synthesized. Included for example are sensors, telemetry, communications, transmitters, receivers, data processing, and data interpretation systems.“
Early Computer Applications
One of the most transformative developments of the late 1960s and early 1970s was the introduction of digital computing to image analysis. Although mainframes and minicomputers were expensive and limited in power, they allowed researchers to experiment with automated classification, contrast enhancement, and pattern recognition.
During these years, advances in semiconductor memory, minicomputers, and early digital frame buffers made it increasingly feasible to store and manipulate images in digital form. Government-funded efforts – particularly through organizations like NASA and the Jet Propulsion Laboratory – drove rapid development of digital image enhancement techniques to process lunar and planetary images from space missions such as the Apollo program and Mariner program. At the same time, early medical imaging modalities like CT scanning were emerging, generating digital data that required computational reconstruction. The convergence of improving hardware, growing data volume, and algorithmic innovation helped transform digital image analysis from an experimental niche into a recognizable scientific discipline. G-GE members at NASA Goddard, the U.S. Geological Survey, and at several universities produced pioneering studies that demonstrated the potential of computer-assisted interpretation related to remote sensing.
Getman also predicted in the Chairman’s Message in the Jan. 1973 Transactions on Geoscience Electronics that computers would have an increasingly important role in how data would be gathered and processed. “In recent years,” he said, “the development of automatic interpretation techniques based upon advances in data processing and the theory of detection and pattern recognition have necessitated the better understanding of fundamental environmental phenomena by the systems designer. Consequently, there has been an increased emphasis on contributions and activities which bridge the gap between the scientist and the engineer.”
A Shifting Technical Focus
In this era the scientific field surrounding G-GE was changing rapidly. The launch of Landsat-1 (then ERTS-1) in 1972 marked a turning point in Earth observation. For the first time, calibrated multispectral images of the entire planet were being collected and made publicly available.
G-GE members were among the first to analyze these data, developing calibration methods, image-processing algorithms, and validation experiments. Simultaneously, radar and microwave research continued to expand. The Seasat and Skylab programs introduced new possibilities for active sensing of oceans and land surfaces, while airborne polarimetric radar systems under development at NASA Goddard and JPL laid the groundwork for future scientific missions.
Transactions Marks the Beginning of a New Era in Environmental Monitoring
With dedicated symposiums paused after 1971, Transactions on Geoscience Electronics acted as the group’s primary communication anchor. Led by editors Alex J. Hoffman and Stephen Riter, the journal maintained a stable quarterly schedule despite the collapse of standalone conferences. The journal saw a transition in leadership that mirrored the group’s shift from traditional “solid-earth” electronics toward more modern data processing and remote sensing. By expanding content from traditional hardware toward satellite data processing following the 1972 Landsat-1 launch, the editors established a unique technical identity: the journal became one of the few places where engineers could publish on the processing of satellite imagery rather than just the satellite hardware.
Most notably, in January 1973, Transactions released the ERTS-1 Special Issue, which included a dedicated series of papers on ERTS experiments. The summaries were grouped according to discipline but it was noted that there was an interdisciplinary nature to these efforts. In the introduction of the special issue, John Rouse as Guest Editor – who would become Chairman of G-GE in 1975 – shared his views on the impact of ERTS-1 on the field: “It is especially evident to those who have lived with this field from the beginning that progress toward realistic application of remote sensing technology has been very 
slow. The launch of ERTS-1 should lead to an acceleration of that progress by extending the utility of this technology in an expanded range of applications, and by focusing the attention of the considerable research talent, represented by the investigators listed in this issue, onto the potential of remote sensing. Most assuredly ERTS-1 marks the beginning of a new era in environmental monitoring.”
Positioning for the Future
By 1974, the Group on Geoscience Electronics had weathered several difficult years. But a clear sense of direction had emerged – spurred on by technological advancements and a dedicated and growing group of volunteers united in their vision for the future.
Next month we will explore “The History of IEEE GRSS at 65: Renewal and Multidisciplinary Integration (1975-1978).”
Take a Closer Look:
NOTE: Among other resources, two major historical sources have been accessed to develop “The History of IEEE GRSS at 65.” These include the following IEEE GRSS publications, which may be of interest to readers interested in more details or context:
