Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: satellites – Page 39

Vortex Radar: Revolutionizing Rotational Detection With THz Waves

Researchers integrate terahertz vortex beam emission to advance radar target detection technology.

You may not realize it, but the Doppler effect is everywhere in our lives, from tracking the speed of cars with radar to locating satellites in the sky. It’s all about how waves change their frequency when a source (like a radar signal) and a detector are in motion relative to each other. However, traditional radar systems hit a roadblock when trying to detect objects moving at right angles to their radar signals. This limitation has driven researchers to explore an entirely new approach.

Introduction to Vortex Radar.

NOAA scientists link exotic metal particles in the upper atmosphere to rockets, satellites

NOAA scientists investigating the stratosphere have found that in addition to meteoric ‘space dust,’ the atmosphere more than seven miles above the surface is peppered with particles containing a variety of metals from satellites and spent rocket boosters vaporized by the intense heat of re-entry.

The discovery is one of the initial findings from analysis of data collected by a high-altitude research plane over the Arctic during a NOAA Chemical Science Laboratory mission called SABRE, short for Stratospheric Aerosol processes, Budget and Radiative Effects. It’s the agency’s most ambitious and intensive effort to date to investigate aerosol particles in the stratosphere, a layer of the atmosphere that moderates Earth’s climate and is home to the protective ozone layer.

Using an extraordinarily sensitive instrument custom-built at NOAA in Boulder, Colorado, and mounted in the nose of a NASA WB-57 research aircraft, scientists found aluminum and exotic metals embedded in about 10 percent of sulfuric acid particles, which comprise the large majority of particles in the stratosphere. They were also able to match the ratio of rare elements they measured to special alloys used in rockets and satellites, confirming their source as metal vaporized from spacecraft reentering Earth’s atmosphere.

Revolutionizing radar: Integrated THz emitter for precise rotating target detection

You may not realize it, but the Doppler effect is everywhere in our lives, from tracking the speed of cars with radar to locating satellites in the sky. It’s all about how waves change their frequency when a source (like a radar signal) and a detector are in motion relative to each other. However, traditional radar systems hit a roadblock when trying to detect objects moving at right angles to their radar signals. This limitation has driven researchers to explore an entirely new approach.

Imagine a radar system that doesn’t just rely on linear waves but instead uses spiraling with orbital angular momentum (OAM). These special “” waves have a helical twist and introduce a signature rotational Doppler effect when they encounter a spinning object.

To improve identification and detection of these rotational Doppler effects, researchers from University of Shanghai for Science and Technology (USST) have harnessed terahertz (THz) waves by developing an integrated THz vortex beam emitter, as reported in Advanced Photonics.

SpaceX to launch Falcon 9 rocket tonight on 16th mission

A SpaceX Falcon 9 rocket will launch 22 Starlink internet satellites to orbit this evening (Oct. 17), if all goes according to plan.

The Falcon 9 is scheduled to lift off from Florida’s Cape Canaveral Space Force Station today at 5:20 p.m. EDT (2120 GMT). If SpaceX doesn’t hit that target, there are five backup opportunities available between 6:11 p.m. EDT and 8:48 p.m. EDT (2211 to 48 GMT), company representatives wrote in a mission description.

SpaceX details Starlink-for-phones plan, launching in 2024

Starlink’s website update is revealing a bit more about its plans for a satellite-delivered cell phone service. The new page for “Starlink Direct to Cell” promises “ubiquitous coverage” from “cellphone towers in space” that will work over bog-standard LTE. The current timeline claims there will be text service starting in 2024, voice and data in 2025, and “IoT” service in 2025.

Today satellite phone connectivity still requires giant, purpose-built hardware, like the old-school Iridium network phones. If you’re only looking for emergency texting, you can also make do with Apple’s introduction of the barely there connectivity paradigm, requiring being inside a connectivity window, holding up a phone, and following a signal-targeting app. Starlink wants to bring full-blown space connectivity to normal smartphone hardware.

Starlink Direct to Cell Services Start in 2024

Starlink satellites will soon be offering Direct to Cell capabilities to enable texting, calling, and browsing everywhere on Earth. SpaceX will start satellite-based text messaging in 2024 and expand to voice and text support in 2025. They will offer cellular connectivity to IoT devices in 2025. The service will work with existing LTE phones without the need for any hardware, firmware changes, or special apps.

Direct to Cell will also connect IoT devices with common LTE standards. SpaceX plans to equip its future Starlink satellites with an advanced eNodeB modem. This innovation will essentially transform a Starlink satellite into a cellphone tower in space.

This will be enabled by tens of thousands of satellites and eventually millions of satellites will replace most of the 5 million cell towers on Earth. It will means everyone and everything can be connected. All people, robots, and self driving vehicles will be connected.

China Makes Advances In Space Lasers, Microwave Weapons

Chinese scientists claim they’ve had unexpected success in developing a high-powered microwave (HPM) weapon, according to The Diplomat. The magazine notes that in January, Huang Wenhua, deputy director of China’s Northwest Institute of Nuclear Technology, was awarded for his research on directed energy, which HPM weapons use.

HPM systems are able to destroy electronic equipment, and in an age when most combat systems—from tanks to planes, radios to satellites—rely on electronics, the weapons could change the way wars are fought. Warships will be fitted with HPM weapons to intercept incoming missiles.

The HPM project, alongside other projects involving lasers and electromagnetic pulses, is part of the Chinese regime’s “Assassin’s Mace” (or “Trump Card”) program designed to defeat a technologically superior opponent by disabling or destroying the technology that makes the opponent superior.

SpaceX says Starlink-for-phones will be available in 2024

The service was supposed to be launched in beta this year but has been pushed back after Starship has failed to reach orbit.

SpaceX’s satellite-powered mobile telephony service could be available in 2024, according to recent changes in the service provider’s webpage. Direct to Cell will allow text, voice, and data services from Starlink’s V2 satellites.

Launched more than 30 years ago, satellite-based telephone services are still as challenging to use as they were back then. With the advent of satellite-based internet services, thanks to Starlink, interest in telephony has increased again. Apple introduced it in their latest iPhone but limited it to emergency purposes and nothing beyond basic texts.

Unmanned and unbothered: Autonomous intelligent oceanic exploration is upon us

The ocean has always been a force to be reckoned with when it comes to understanding and traversing its seemingly limitless blue waters. Past innovations such as deep-sea submersibles and ocean-observing satellites have helped illuminate some wonders of the ocean though many questions still remain.

These questions are closer to being answered thanks to the development of the Intelligent Swift Ocean Observing System (ISOOS). Using this system, targeted regions of the ocean can be mapped in a three-dimensional method allowing for more data to be gathered in a safer, quicker and more efficient method than existing technologies can achieve.

Researchers published their results in Ocean-Land-Atmosphere Research.

SpaceX Starlink lands Maersk in new deal for Ocean fleet

SpaceX’s Starlink satellite internet service has landed a new client in Maersk, as the two companies came to terms on a deal that would provide the company’s Ocean fleet with internet access.

Maersk announced this morning that more than 330 own-operated container vessels will now have Starlink installed, enabling the fleet to access high-speed internet with speeds at over 200 Mbps.

The logistics company said the deal with SpaceX’s Starlink service “is a leap forward in terms of internet speed and latency, which will bring significant benefits in terms of both crew welfare and business impact.”