Boeing signs off design of anti-jamming tech that keeps satellites online Boeing said on Tuesday its anti-jam ground-based satellite communications system had passed the necessary tests to validate its design for use in the U.S. Space Force’s Pathfinder program. The aerospace giant hit the milestone by demonstrating the system, called the Protected Tactical Enterprise Service (PTES), with an on- …
"Data protection is achieved by using a bit-cover process before frames are grouped into information blocks for encoding. The DVB-S2 short block code [4] is used as the primary forward-error-correction (FEC) mechanism. This provides a fixed 16,200 bit encoded block length based on a combination of LDPC and BCH techniques with resulting rates ranging from 0.19 to 0.88 and supporting approximately 10 dB of link SNR fluctuation for a given symbol rate and modulation.
Codeword data is grouped into symbols and multiplexed across many hops, where a hop is the duration of time a transmission stays at one frequency before “hopping” away to another frequency. The hops are then permuted in time. Together, these features provide increased resistance to transient jamming or interference."
Implementation and Testing of the Protected Tactical Waveform (PTW) Brian J. Wolf, Member, IEEE, and Jacob C. Huang
> China needs the capability to shoot down low-earth-orbit Starlink satellites.
One thing that get me about these comments is that Starlink is in LEO, so they orbit faster than the earth, so for China to clear the space above it they would have to zap *every* starlink in that orbital path leaving a "band" around the planet just filled with debris.
So just not practical.
(Spaceball 1's radar has been jammed.) Radar Technichan: [Through P.A to Col. Sandurz] Sir! [Sandurz and Dark Helmet look over] Can I see you for a minute, please sir?
[Sandurz and Helmet walk over]
Sandurz:What is it Private?
Radar Technichan: [Still through the P.A] I'm having trouble with the radar, sir!
[Sandurz grabs the microphone the Technichan was just using]
Sandurz: You don't need that, lieutenant. We're here. Now what is it?
Radar Technician: [Still through the P.A] I'm having trouble with the radar, sir.
[Helemet rips the microphone from the console and throws it aside.]
Dark Helmet: Now what is it?!
Radar Technician: [Normally] I'm having trouble with the radar, sir!
Dark Helmet: What's wrong with it?!
Radar Technician: I've lost the bleeps, I lost the sweeps, and I lost the creeps.
Dark Helmet: The what?
Colonel Sandurz: The what?
Dark Helmet: And the what?
Radar Techician: You know, the bleeps... [Makes beeping noise]... the sweeps... [Makes vibrating noise] and the creeps. [Makes squeaking noise]
Dark Helmet: [Quietly, to Sandurz] That's not all he's lost.
Radar Technician: Wait, sir! The radar, sir! It appears to be... [Jam starts flowing through the computer screen] jammed!
Dark Helmet: Jammed... [Examines the jam and tastes it] Raspberry. There's only one man... [Sandurz gets out of the way of the approaching camera] ...who would dare give me the raspberry! [Pulls his mask down] Lone Starr! [Walks into the camera and collapses]
These same satellites would still get knocked out of action in the case of a solar flare
Sometimes I wonder if humans really understand what a real threat looks like, clue it isn’t other humans, and before you start thinking aliens, nope, the universe is a very dangerous place, and we are mere babies in relation to our time in existence.
Personally, I am looking forward to the demise of this idiot ape-man lifeform subset
The Register 
Biting the hand that feeds IT
Copyright. All rights reserved © 1998–2025
