NASA achieved a breakthrough in deep space communication by transmitting a high-definition video from 19 million miles, paving the way for advanced data transmission in space exploration. Credit: NASA/JPL-Caltech
The video, featuring a cat named Taters, was sent back from nearly 19 million miles away by NASA’s laser communications demonstration, marking a historic milestone.
NASA’s Deep Space Optical Communications experiment beamed an ultra-high definition streaming video on December 11 from a record-setting 19 million miles away (31 million kilometers, or about 80 times the Earth-Moon distance). The milestone is part of a NASA technology demonstration aimed at streaming very high-bandwidth video and other data from deep space – enabling future human missions beyond Earth orbit.
“This accomplishment underscores our commitment to advancing optical communications as a key element to meeting our future data transmission needs,” said NASA Deputy Administrator Pam Melroy. “Increasing our bandwidth is essential to achieving our future exploration and science goals, and we look forward to the continued advancement of this technology and the transformation of how we communicate during future interplanetary missions.”
Members of the DSOC team react to the first high-definition streaming video to be sent via laser from deep space on December 11 at NASA’s Jet Propulsion Laboratory. Sent by the DSOC transceiver aboard the Psyche spacecraft, nearly 19 million miles from Earth, the video features a cat named Taters. Credit: NASA/JPL-Caltech
The demo transmitted the 15-second test video via a cutting-edge instrument called a flight laser transceiver (see image below). The video signal took 101 seconds to reach Earth, sent at the system’s maximum bit rate of 267 megabits per second (Mbps). Capable of sending and receiving near-infrared signals, the instrument beamed an encoded near-infrared laser to the Hale Telescope at Caltech’s Palomar Observatory in San Diego County, California, where it was downloaded. Each frame from the looping video was then sent “live” to NASA’s Jet Propulsion Laboratory in Southern California, where the video was played in real time.
The Deep Space Optical Communications (DSOC) technology demonstration’s flight laser transceiver is shown at NASA’s Jet Propulsion Laboratory in Southern California in April 2021, before being installed inside its box-like enclosure that was later integrated with NASA’s Psyche spacecraft. The transceiver consists of a near-infrared laser transmitter to send high-rate data to Earth, and a sensitive photon-counting camera to receive ground-transmitted low-rate data. The transceiver is mounted on an assembly of struts and actuators – shown in this photograph – that stabilizes the optics from spacecraft vibrations. Credit: NASA/JPL-Caltech
The laser communications demo, which launched with NASA’s Psyche mission on October 13, is designed to transmit data from deep space at rates 10 to 100 times greater than the state-of-the-art radio frequency systems used by deep space missions today. As Psyche travels to the main asteroid belt between Mars and Jupiter, the technology demonstration will send high-data-rate signals as far out as the Red Planet’s greatest distance from Earth. In doing so, it paves the way for higher-data-rate communications capable of sending complex scientific information, high-definition imagery, and video in support of humanity’s next giant leap: sending humans to Mars.
“One of the goals is to demonstrate the ability to transmit broadband video across millions of miles. Nothing on Psyche generates video data, so we usually send packets of randomly generated test data,” said Bill Klipstein, the tech demo’s project manager at JPL. “But to make this significant event more memorable, we decided to work with designers at JPL to create a fun video, which captures the essence of the demo as part of the Psyche mission.”
This 15-second ultra-high-definition video featuring a cat named Taters was streamed via laser from deep space by NASA on December 11, 2023. It was part of the technology demonstration known as Deep Space Optical Communications (DSOC), which is attached to the Psyche spacecraft traveling to the asteroid belt between Mars and Jupiter. Graphics superimposed over the orange tabby cat illustrate several features from the tech demo, such as Psyche’s orbital path and technical information about the laser. Credit: NASA/JPL-Caltech
Feline Frequency
Uploaded before launch, the short ultra-high definition video features an orange tabby cat named Taters, the pet of a JPL employee, chasing a laser pointer, with overlayed graphics. The graphics illustrate several features from the tech demo, such as Psyche’s orbital path, Palomar’s telescope dome, and technical information about the laser and its data bit rate. Tater’s heart rate, color, and breed are also on display.
“Despite transmitting from millions of miles away, it was able to send the video faster than most broadband internet connections,” said Ryan Rogalin, the project’s receiver electronics lead at JPL. “In fact, after receiving the video at Palomar, it was sent to JPL over the internet, and that connection was slower than the signal coming from deep space. JPL’s DesignLab did an amazing job helping us showcase this technology – everyone loves Taters.”
A computer screen in the mission support area shows Taters the cat in a still from the first high-definition streaming video to be sent via laser from deep space, as well as the incoming data stream delivering the frames from the video. Credit: NASA/JPL-Caltech
There’s also a historical link: Beginning in 1928, a small statue of the popular cartoon character Felix the Cat was featured in television test broadcast transmissions. Today, cat videos and memes are some of the most popular content online.
Milestone After Milestone
This latest milestone comes after “first light” was achieved on November 14. Since then, the system has demonstrated faster data downlink speeds and increased pointing accuracy during its weekly checkouts. On the night of December 4, the project demonstrated downlink bit rates of 62.5 Mbps, 100 Mbps, and 267 Mbps, which is comparable to broadband internet download speeds. The team was able to download a total of 1.3 terabits of data during that time. As a comparison, NASA’s Magellan mission to Venus downlinked 1.2 terabits during its entire mission from 1990 to 1994.
“When we achieved first light, we were excited, but also cautious. This is a new technology, and we are experimenting with how it works,” said Ken Andrews, project flight operations lead at JPL. “But now, with the help of our Psyche colleagues, we are getting used to working with the system and can lock onto the spacecraft and ground terminals for longer than we could previously. We are learning something new during each checkout.”
Members of the JPL team pose after the first streamed ultra-HD video was received from deep space. Remote team members (including Taters the cat) appear on the meeting screen. Standing, from left, are: Dan Goods, Abi Biswas, Ryan Rogalin, Meera Srinivasan, Bill Klipstein, Oliver Lay, and Christine Chen. Credit: NASA/JPL-Caltech
More About the Mission
The Deep Space Optical Communications demonstration is the latest in a series of optical communication demonstrations funded by the Technology Demonstration Missions (TDM) program under NASA’s Space Technology Mission Directorate and supported by NASA’s SCaN (Space Communications and Navigation) program within the agency’s Space Operations Mission Directorate.
The Psyche mission is led by Arizona State University. JPL is responsible for the mission’s overall management, system engineering, integration and test, and mission operations. Psyche is the 14th mission selected as part of NASA’s Discovery Program under the Science Mission Directorate, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama. NASA’s Launch Services Program, based at the agency’s Kennedy Space Center in Florida, managed the launch service. Maxar Technologies in Palo Alto, California, provided the high-power solar electric propulsion spacecraft chassis.
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