A critical setback for NASA's Deep Space Network (DSN) has left one of its key antennas damaged and offline, with no expected return to service until May. This incident, which occurred last fall, has sparked concerns and raised questions about the network's resilience and future capabilities.
The DSS-14 antenna, a vital 70-meter dish located in Goldstone, California, suffered damage when it over-rotated, causing stress to its cabling and piping. The incident also affected the antenna's fire control system, leading to flooding. NASA initially remained tight-lipped about the damage, with rumors circulating for weeks before the agency publicly acknowledged the issue in early November.
DSS-14 is one of three 70-meter antennas in the DSN, playing a crucial role in communicating with distant spacecraft and those facing technical difficulties. Each DSN site also operates smaller antennas, but the loss of DSS-14 has left a significant gap in their capabilities.
In addition to its communication role, DSS-14 serves as a planetary radar, transmitting signals that provide valuable data on near-Earth asteroids. Scientists use this data to characterize these asteroids, determining their size, shape, and other crucial attributes.
Lance Benner, a scientist at NASA's Jet Propulsion Laboratory, who utilizes DSS-14 for planetary radar work, shared an update at a recent Small Bodies Assessment Group meeting. He confirmed that the investigation into the incident is ongoing and clarified that the damage did not occur during planetary radar observations.
Benner stated that DSS-14 is officially scheduled to resume operations on May 1, but there are rumors suggesting this date could change. He also revealed that DSS-14 was already slated to go offline in August 2026 for extensive maintenance, with the process expected to last until October 2028. This maintenance aims to replace aging equipment, some of which is 40 to 50 years old, effectively extending the operational lifetime of the antenna.
With DSS-14 currently offline and facing an extended period out of service, researchers are exploring alternative options for planetary radar observations. One such alternative involves using another Goldstone antenna, DSS-13, as a radar transmitter, with signals received at the Green Bank Observatory in West Virginia. However, this system is significantly less sensitive compared to DSS-14.
Despite the anticipated return of DSS-14 to full service in October 2028, Benner suggested that limited observations could commence as early as April of that year. He emphasized that the antenna and its radar capabilities are expected to be operational well before the asteroid Apophis makes its close flyby of Earth in April 2029.
The challenges faced by the DSN extend beyond the loss of DSS-14. The network is also under pressure from the upcoming Artemis 2 mission, scheduled for launch as early as February. NASA relies on the DSN to support communications with the Orion spacecraft during its 10-day lunar mission. The support provided for Artemis 1 in 2022 strained the network, forcing other missions to sacrifice hundreds of hours of antenna time. A similar impact is anticipated for Artemis 2.
Greg Heckler, deputy program manager for capability development in NASA's SCaN program, highlighted the increased demands of the Artemis missions on the DSN. He acknowledged the stress and pressure these missions place on the network but also saw an opportunity to enhance its capabilities and resilience for future human exploration endeavors.
Heckler emphasized the need to upgrade the DSN infrastructure to meet the requirements of Artemis and benefit science missions simultaneously. He expressed optimism about the potential for securing the necessary resources to ensure the network's robustness, citing both new capabilities and long-overdue maintenance.
However, he cautioned science missions to expect reduced access to the DSN during Artemis flights, which could extend up to four weeks. He reassured the scientific community that they would have ample time to utilize the network for their missions during the remaining months of the year, especially if the network's capabilities are expanded and made more resilient.
The challenges faced by the DSN highlight the delicate balance between supporting human exploration missions and accommodating the needs of scientific research. As the network navigates these pressures, it must adapt and evolve to meet the growing demands of space exploration while ensuring the continuity of vital scientific endeavors.
