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U.S. Space Force and the dangerous clutter of human-produced stuff in space

What Does the U.S. Space Force Actually Do? Inside the highly secretive military branch responsible for protecting American interests in a vulnerable new domain

NYT, By Jon Gertner,  Nov. 8, 2023

Chief Master Sgt. Ron Lerch of the U.S. Space Force sat down in his office in Los Angeles one morning in September to deliver a briefing known as a threat assessment. The current “threats” in space are less sci-fi than you might expect, but there are a surprising number of them: At least 44,500 space objects now circle Earth, including 9,000 active satellites and 19,000 significant pieces of debris.

What’s most concerning isn’t the swarm of satellites but the types. “We know that there are kinetic kill vehicles,” Lerch said — for example, a Russian “nesting doll” satellite, in which a big satellite releases a tiny one and the tiny one releases a mechanism that can strike and damage another satellite. There are machines with the ability to cast nets and extend grappling hooks, too. China, whose presence in space now far outpaces Russia’s, is launching unmanned “space planes” into orbit, testing potentially unbreakable quantum communication links and adding A.I. capabilities to satellites.

An intelligence report, Lerch said, predicted the advent, within the next decade, of satellites with radio-frequency jammers, chemical sprayers and lasers that blind and disable the competition. All this would be in addition to the cyberwarfare tools, electromagnetic instruments and “ASAT” antisatellite missiles that already exist on the ground. In Lerch’s assessment, space looked less like a grand “new ocean” for exploration — phrasing meant to induce wonder that has lingered from the Kennedy administration — and more like a robotic battlefield, where the conflicts raging on Earth would soon extend ever upward.

The Space Force, the sixth and newest branch of the U.S. military, was authorized by Congress and signed into law by President Donald Trump in December 2019. Its creation was not a partisan endeavor, though Trump has boasted that the idea for the organization was his alone. The initiative had in fact been shaped within the armed forces and Congress over the previous 25 years, based on the premise that as satellite and space technologies evolved, America’s military organizations had to change as well……………………………………………………………………………….

 nearly every aspect of modern warfare and defense — intelligence, surveillance, communications, operations, missile detection — has come to rely on links to orbiting satellites………………

the strategic exploitation of space now extends well beyond military concerns. Satellite phone systems have become widespread. Positioning and timing satellites, such as GPS (now overseen by the Space Force), allow for digital mapping, navigation, banking and agricultural management. A world without orbital weather surveys seems unthinkable. Modern life is reliant on space technologies to an extent that an interruption would create profound economic and social distress…………………………………………………………………………………………………………………

Guardians tend to think of the realm they patrol as a kind of structured multilevel terrain — Earth as being surrounded by three highways, or three rings. The nearest level, low Earth orbit (LEO), is host to constellations like SpaceX’s Starlink network and the International Space Station, which moves about 250 miles above us at 17,500 miles per hour. A medium Earth orbit (MEO), between 1,200 and 22,000 miles above, is where GPS satellites circle. At the highest ring — at least for now — is a track known  as “geosynchronous” orbit (GEO), because an object in such an orbit keeps pace with Earth’s rotation. This band is home to DirectTV satellites, weather-tracking instruments from the National Oceanic and Atmospheric Administration and crucial Defense Department communication links.

It’s a technological zoo up there. The satellite mix is foreign and domestic, young and old, sinister and peaceful. The technologies are all different sizes, flying at different speeds and altitudes. The challenge for the force is to monitor all movement but also to track the threatening presence of debris, some of which is naturally occurring (tiny rocks, for instance) and some of which has human origins (like shards of old rockets). Because space junk can move at extraordinary velocities, a floating screw might pack a destructive punch equivalent to a small bomb……………………………………………………………………………………………………………………………………

 Capt. Raymond Pereira, drawing on a white board, pointed me to another concern: the crowd of satellites in low Earth orbit. “I would say we’re probably already entering into an area where congestion is a problem,” he said, “and anything that would generate debris would be catastrophic for the domain.” One plausible theory is known as the Kessler Syndrome, named after the former NASA scientist Donald Kessler, which posits that a release of wreckage and fragments in this orbit could eventually lead to a domino effect of unstoppable destruction. Pereira pointed out that if someone (or something) were to touch off such an event, “they would not only be harming their adversary; they would be harming themselves.”  But even short of that, a single collision or attack might hamstring science missions to the moon, or to Mars, or lead to failures for GPS and communications systems, a problem that could have huge consequences for life on Earth.

………………………. A treaty from the late 1960s, signed by most of the major nations on Earth, prohibits the use of nuclear weapons in space and designates the moon for peaceful purposes. But recently, I was told, satellites from foreign adversaries have been coming close to machines from the United States and its allies. The treaty says nothing about such provocations — or about grappling hooks, nesting dolls and cyberwarfare.

Space Force leaders readily describe their guardians as working toward a state of combat readiness…………………………………………………………..

Debris has led military strategists to ponder a related issue: In space, it’s difficult to get out of the way of conflict……………………………………………………………………………………………………………….

………………….. “And then potentially every satellite becomes more debris,” Saltzman remarked. “Every peaceful satellite could become a weapon accidentally.”…………………………………………………………………………………. more https://www.nytimes.com/2023/11/08/magazine/space-force.html

November 14, 2023 - Posted by Christina Macpherson | space travel, USA