The Brief

A constellation of classified defense satellites built by the commercial company SpaceX is emitting a mysterious signal that may violate international standards, NPR has learned.

Satellites associated with the Starshield satellite network appear to be transmitting to the Earth's surface on frequencies normally used for doing the exact opposite: sending commands from Earth to satellites in space. The use of those frequencies to "downlink" data runs counter to standards set by the International Telecommunication Union, a United Nations agency that seeks to coordinate the use of radio spectrum globally.

Starshield's unusual transmissions have the potential to interfere with other scientific and commercial satellites, warns Scott Tilley, an amateur satellite tracker in Canada who first spotted the signals.

"Nearby satellites could receive radio-frequency interference and could perhaps not respond properly to commands — or ignore commands — from Earth," he told NPR.

Outside experts agree there's the potential for radio interference. "I think it is definitely happening," said Kevin Gifford, a computer science professor at the University of Colorado, Boulder who specializes in radio interference from spacecraft. But he said the issue of whether the interference is truly disruptive remains unresolved.

SpaceX and the U.S. National Reconnaissance Office, which operates the satellites for the government, did not respond to NPR's request for comment.

Caught by the wrong antenna

The discovery of the signal happened purely by chance.

Tilley regularly monitors satellites from his home in British Columbia as a hobby. He was working on another project when he accidentally triggered a scan of radio frequencies that are normally quiet.

"It was just a clumsy move at the keyboard," he said. "I was resetting some stuff and then all of a sudden I'm looking at the wrong antenna, the wrong band."

The band of the radio spectrum he found himself looking at, between 2025-2110 MHz, is reserved for "uplinking" data to orbiting satellites. That means there shouldn't be any signals coming from space in that range.

But Tilley's experienced eye noticed there appeared to be a signal coming down from the sky. It was in a part of the band "that should have nothing there," he said. "I got a hold of my mouse and hit the record button and let it record for a few minutes."

Tilley then took the data and compared it to a catalog of observations made by other amateur satellite trackers. These amateurs, located around the world, use telescopes to track satellites as they move across the sky and then share their positions in a database.

"Bang, up came an unusual identification that I wasn't expecting at all," he said. "Starshield."

Starshield is a classified version of SpaceX's Starlink satellites, which provide internet service around the world. The U.S. has reportedly paid more than $1.8 billion so far for the network, though little is known about it. According to SpaceX, Starshield conducts both Earth observation and communications missions.

Since May of 2024, the National Reconnaissance Office has conducted 11 launches of Starshield satellites in what it describes as its "proliferated system."

So far, the National Reconnaissance Office says it has launched more than 200 satellites as part of its "proliferated architecture" system to facilitate military Earth observations and communications missions.

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National Reconnaissance Office handout

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"The NRO's proliferated system will increase timeliness of access, diversify communications pathways, and enhance resilience," the agency says of the system. "With hundreds of small satellites on orbit, data will be delivered in minutes or even seconds."

Tilley says he's detected signals from 170 of the Starshield satellites so far. All appear in the 2025-2110 MHz range, though the precise frequencies of the signals move around.

Signal's purpose in question

It's unclear what the satellite constellation is up to. Starlink, SpaceX's public satellite internet network, operates at much higher frequencies to enable the transmission of broadband data. Starshield, by contrast, is using a much lower frequency range that probably only allows for the transmission of data at rates closer to 3G cellular, Tilley says.

Tilley says he believes the decision to downlink in a band typically reserved for uplinking data could also be designed to hide Starshield's operations. The frequent shift in specific frequencies used could prevent outsiders from finding the signal.

Gifford says another possibility is that SpaceX was just taking advantage of a quiet part of the radio spectrum. Uplink transmissions from Earth to satellites are usually rare and brief, so these frequencies probably remain dark most of the time.

"SpaceX is smart and savvy," he says. It's possible they decided to just "do it and ask forgiveness later."

He notes it's unlikely the signals from Starshield have caused significant disruptions so far, otherwise other satellite operators would have complained.

Tilley told NPR he has decided to go public with his discovery because the world's satellite operators should be aware of what's happening.

"These are objects in classified orbits, which could potentially disturb other legitimate uses of space," he said.
Copyright 2025 NPR

The $360 million effort to turn Exposition Park’s largest parking lots into green space won’t be completed in time for the 2028 Olympics.

State leaders announced the multi-million dollar investment into the park in 2024, planning to prep the park for an Olympic close-up by replacing the warren of asphalt lots on Expo Park’s southern edge with an underground lot and green park land.

Now park officials say the 6-acre project now won’t break ground until 2028, after the Olympic torch is extinguished.

Expo Park and the Los Angeles Memorial Coliseum will be a centerpiece of L.A.’s Olympic image in the summer of 2028. But for residents of the surrounding South L.A. neighborhoods, the park and its facilities help fill a serious need for recreation and green space.

Andrea Ambriz, general manager of the state-run park, said the park hasn’t had an investment of this kind since the 1984 Olympic Games, but that the inspiration and funding for the park project go beyond the 2028 games.

“Whatever we do now is intended in full to support the community. It’s not just for these games,” Ambriz said.

Ambriz said park officials hit pause on project planning after realizing it would not be completed before the Olympics.

State leaders are still angling to get at least some of the park freshened up in time for the Olympics, with officials announcing in January that Gov. Gavin Newsom planned to earmark $96.5 million in proposed funds for renovations in the park.

The funding, according to the governor’s proposed budget, will be used for “critical deferred maintenance” to meet code compliance and accessibility requirements.

Ambriz said the lion’s share of the money will go to rehabbing roadways, sidewalks and ramps throughout the park to ensure safe pedestrian and vehicle access.

“This is a part of what we know we need,” Ambriz said. “It is a really significant downpayment from the state.”

How will the park affect the neighborhood? 

John Noyola is a 42-year resident of the Exposition Park neighborhood who sits on the North Area Neighborhood Development Council. For him, any major overhaul of the park still feels like an abstract concept.

He’s seen news reports about the proposed changes, but heard little more.

“It hasn’t really affected us or the community,” Noyola said.

The 150-year-old Expo Park has one of the densest collections of cultural institutions in Los Angeles, said Esther Margulies, a professor of landscape architecture just across the street from the park at USC.

Four museums, including the under-construction Lucas Museum of Narrative Art, will soon share the park with the BMO Stadium and the Coliseum.

Margulies said Grand Park, in downtown Los Angeles, has begun to fill a role as a “living room for the city” in recent years, but that Expo Park is falling short of its potential.

“People should see Expo Park as a place to begin their journey of visiting Southern California and Los Angeles,” Margulies said. “This is where you should come and there should be this energy of, like, ‘Wow!’”

Changing Expo Park, Margulies said, starts with building a space that serves its community.

In its current design, the park’s best-kept green spaces sit behind the fences of its museums, Margulies said, and large asphalt expanses act as heat sinks. Major events often come at the community’s expense.

“There’s tailgating, day drinking in the park,” Margulies said. “People don’t come to the park on those days.”

Noyola, the Expo Park resident, said his family and others in the community frequent the park recreation center, pools and fields near the intersection of Vermont Avenue and Martin Luther King Jr. Boulevard. He worries that construction could block parking or other access to the park spaces that are available.

He remains wary of the unintended consequences of a park remodel, especially after watching traffic spike in Inglewood when SoFi Stadium and the Intuit Dome were built.

“It would be nice,” Noyola said of the remodel. “Looking at the greater vision of LA 28, it’s needed. But at what cost?”

Southern California is in for a wet week, with the potential for what the weather service is calling "widespread" impacts.

Ahead of the heavy rain, L.A. Mayor Karen Bass has issued an evacuation warning for the Palisades, Sunset and Hurst burn scar areas due to the potential for mud and debris flows.

The warning is in effect from 9 p.m. on Sunday until 9 a.m. on Tuesday.

Storm details

When is the rain coming?

Rain is expected to arrive in Ventura and Los Angeles counties Sunday night, according to the National Weather Service.

When is the rain heaviest?

Weather forecast this week for Southern California.

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Courtesy NWS

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Moderate to heavy rain is expected early Monday, with significant snow and damaging winds starting at about 3 a.m. Heaviest impacts, including the possibility of widespread flooding and thunderstorms, are expected to last until around 9 p.m.

Rain continues all week

Light rain is expected to continue Tuesday through Friday.

Upcoming weather alerts for L.A.

• A Flood Watch will go into effect on Monday, from 9 a.m. to 9 p.m.
• A Wind Advisory will go into effect Monday, from 6 a.m. to 6 p.m.
• A High Surf Advisory will go into effect Monday at 10 a.m. through Thursday, Feb. 19 at 9 a.m. for the Pacific Palisades, Playa del Rey, San Pedro and Port of Los Angeles areas. Angelenos are encouraged to avoid the ocean.
• A Gale Watch, which includes sustained surface winds near coastal areas, will go into effect Monday from 6 a.m. to 6 p.m. for all inner waters near the Pacific Palisades, Playa del Rey, San Pedro and Port of Los Angeles areas. Angelenos are encouraged to avoid boating until the weather is calmer.

Today, millions of Angelenos use the Central Library downtown (which turns 100 this year) and over 70 branch locations to access the Los Angeles Public Library’s collection of over 8 million books.

But this juggernaut wasn’t created overnight. What started with just 750 books in 1872 was transformed in part because of city librarian Everett Perry, a visionary who wanted books to be easy to access. Here’s a look at how his influence can still be felt today.

A library in disarray 

Perry got the job as top librarian in L.A. after working at the New York Public Library, which opened a main building during his tenure. He was accustomed to growth.

But when he arrived in 1911, the Los Angeles Public Library was struggling. With no permanent location, it had moved several times into different rented spaces, the most recent being in the Hamburger's Department Store, where patrons had to ride an elevator to check out books in between women’s clothes and furniture.

Perry aired his grievances in a 1912 library report.

Everett Robbins Perry in 1911.

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Witzel Photo

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Los Angeles Public Library Institutional Collection

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“The modern library aims to be a vital force in a community,” he wrote. “It can not perform this function, if its usefulness is limited by an inaccessible location.”

This is an early look into his ethos as librarian. Perry was part of a progressive crop of librarians, whose ideas were shifting about how books should be stored and used by the public.

His goal was to create a library system focused on great service and that rivaled the very best on the East Coast. With others, he pushed for a central library to be built, funded by a $2 million bond measure. Voters passed that in the 1920s, which led to the creation of the impressive Art Deco building that still stands downtown.

But what was perhaps even more impressive was how he infused the building with novel ideas about how to make reading more accessible.

One key example was his decision to set up subject departments. For decades prior, libraries stored books on fixed shelves (these couldn’t be adjusted), so they were usually sorted by size or acquisition date. Libraries had only recently moved to the not-very-user-friendly Dewey decimal system.

By grouping books under subjects, Perry made it much easier for people to find what they wanted. His idea was so successful that it eventually spread to other libraries across the country.

Another innovation was where you could read the books. Perry put the circulation and card catalog area in the center of the floor, which was surrounded by book stacks and reading rooms along the edges. That meant they were next to the windows and full of natural light, which according to LAPL, wasn’t customary at the time.

The reference room of the Main Library, seen circa 1913, was in an enclosed section on the third floor of the Hamburger Building, a department store.

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Los Angeles Public Library Institutional Collection

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Building a teaching program

Perry earned a reputation as a fair, iron-fist leader who wanted top-notch library practices.

He issued a rulebook for staff that covered everything from the janitor’s responsibility to make brooms last longer to requiring librarians to go with patrons to find books.

But Perry’s legacy also includes the next generation of librarians. In 1914, he revamped an aging LAPL librarian training program into a full-fledged, accredited library school that was known as the best in California.

Artist Dean Cornwell, left, shows his proposal for the Central Library rotunda murals to city librarian Everett Perry sometime in the 1920s.

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Los Angeles Public Library Institutional Collection

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The history department at the Central Library in 1926. This was one of the largest reading rooms of the library.

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Mott Studios

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Los Angeles Public Library Legacy Collection

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He aimed to professionalize librarianship by encouraging men to apply (it had commonly been women), urging all applicants to have at least some college-level education, and creating a formal internship program. The program covered technical librarian skills, as well new coursework that compared how other libraries functioned across the country.

Perry served for over two decades until his death in 1933.

His achievements were numerous. Aside from getting the Central Library built, he grew the staff from 98 to 600, helped the 200,000-book collection balloon to 1.5 million, and added dozens of more branch libraries.

In 2018 he was inducted into the California Library Hall of Fame.

Federal immigration agents have left a U.S. Coast Guard facility that's been a key staging area for them in the Port of L.A., according to U.S. Rep. Nanette Barragan who represents the area.

Since last summer, agents have been using the base on Terminal Island as a launch point for operations.

In a statement to LAist, Barragan, a Democrat, says she confirmed with the Coast Guard last night that Immigration and Customs Enforcement and Border Patrol have vacated the base. She says it's unclear at this time whether the move is permanent or if agents are moving to another location in L.A. County.

Local officials and community groups are celebrating the agents' departure from Terminal Island. Volunteers with the Harbor Area Peace Patrols have been monitoring agent activity for months, tracking vehicles and sharing information with advocacy networks.

Earlier this week, the group said it received reports of the department.