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Category: satellites

It’s rare that faster can also equate to greener in the aerospace industry, but that’s the goal of Australian startup Hypersonix has in sight.

The company has developed a new hypersonic satellite launch system that will make launches more accessible and also more sustainable. The technology could one day also help develop hypersonic airliners capable of crossing the Atlantic in a little over an hour.

“At Mach 5 and above, friction caused by molecules flowing over the hypersonic aircraft can generate temperatures in excess of 2,000˚C (3,632˚F),” the company says in a press statement. “Suffice to say that Brisbane-based aerospace engineering start-up, Hypersonix Launch Systems, is choosing its materials to cope with these extremes.”

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Elon Musk—via Starlink, a division of SpaceX—is in talks with “several” airlines to provide in-flight WiFi for passengers. His plan is to use Starlink’s ever-growing megaconstellation of satellites to equip customers with better WiFi while they fly the friendly skies.

Jonathan Hofeller, SpaceX’s vice president of Starlink and commercial sales, gave out details on the ambitious plan during a panel at the Connected Aviation Intelligence Summit on Wednesday.

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My Chapter Titled ‘’, has been published in ‘Handbook of Real-Time Computing’ in Springer Nature. The chapter provides information on satellite communication networks for different orbits, use-cases, scenarios, link budget analyses, history, and future developments.

Software-defined radio (SDR) is one of many new technologies being adopted by satellite communication to lower the costs both operational and capital by reducing the amount of radio equipment involved in the communication chain and by giving the advantage of remote configuration and regular firmware updates. SDR basically replaces most of the radio equipment by a single computing device with software capable of performing functions of the replaced hardware equipment. SDRs are introduced not only in terrestrial gateways and ground stations, but next generations of LEO and GEO satellites are already adopting the technology. Previously, satellite radio links were limited to the configuration of radio equipment that was installed during the manufacturing of the satellite, which couldn’t be modified throughout the lifespan of the satellite.

Figure 15 displays a generic digital communication transmit and receive RF chain at the physical layer for binary, sampled, and analogue data streams. Data in binary that is collected from data source at transmit end is coming from the higher layers, which is then coded in binary, modulated to sampled, converted to analogue waveform through digital to analogue converter before sending it to the antenna end for transmission over-the-air interface with required transmit power. At the receive end, the wireless signal is received as analogue, converted to sampled for demodulation, decoded to binary, and sent to data sink for integrating with upper layers. The coding/decoding and modulation/demodulation, commonly referred to as MOD/COD, are programmable functions and can be replaced by SDR using a processing device. This can be done at the ground stations, at the gateway, user terminals, and at the satellite using on-board processing.

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This is interesting. It looks like SpaceX is abandoning their backup plan to launch V2.0 Starlink satellites with the Falcon 9 and instead they are going to launch them with Starship instead. They are also saying they will be ready to launch them as soon as 2 months from now. This confirms the rumors that I’ve been hearing that the Raptor 2 engine for Starship is much more stable than the Raptor 1 engines were.

Note that this means they are planning on launching satellites before they have perfected landing but this makes sense since they did the same with the Falcon 9, crashing and burning 19 rockets in a row until they were able to land part of one. It should take 5 or less orbital attempts to land the Starship booster stage. (They will lose a ton of engines with the booster stage so this will be a high priority to get working.)

TAMPA, Fla. — SpaceX has dropped a plan to use Falcon 9 to launch the 30,000 satellites in its proposed second-generation Starlink broadband constellation, and is instead focusing on a configuration leveraging its upcoming Starship vehicle.

The decision follows development progress that SpaceX said exceeded the company’s expectations and means it could start “launching the Gen2 system as early as March 2022,” SpaceX lawyer William Wiltshire said in a Jan. 7 letter to the Federal Communications Commission.

Starship missions are subject to a favorable environmental review into SpaceX’s launch facility at Boca Chica, Texas, which the Federal Aviation Administration expects to complete Feb. 28.

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SpaceX launched another batch of Starlink satellites to the fourth shell of the constellation for the first global orbital launch attempt of the year.

Lifting off from historic Launch Complex 39A (LC-39A), the Starlink Group 4–5 mission lifted 49 Starlink v1.5 satellites southeastward from Kennedy into a 210 x 339 km low Earth orbit with an inclination of 53.22 degrees.

Following payload separation, the satellites will slowly raise their orbit until they are in their operational altitude of 540 km. This process takes several months due to the low-thrust but high-efficiency Krypton ion thrusters on the Starlink satellites.

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The deal will involve SpaceX installing ground stations inside google’s data centers to link with Starlink satellites. This synergy will provide ultra-fast internet services to enterprise clients. We could start seeing the outcome of the partnership as early as this year, especially since Musk has promised Starlink would exit beta mode despite the size of googling this deal is enormous because it is giving an edge in its competition the software behemoth Microsoft and online retail king Amazon in the cloud computing market.

Google needs to diversify as quickly as possible because its advert business is no longer growing at the usual rate. The cloud is a way for Google to shore up its revenue to sustain its growth, so landing a client like SpaceX is a big deal for Google because its cloud computing service will be delivered to clients at high speed the first at Google data center to host a starling the base station is in New Albany Ohio followed by other data centers in the US. Still, ultimately most of google’s data centers worldwide would be connected.

Google and SpaceX had a bit of history back in 2015; the search giant invested 900 million dollars into SpaceX, which was meant to cover various technologies, including making the satellites themselves. Hence, it is natural that the two companies would do business together. The deal benefits all the parties involved, and Google brings its cloud services to more customers through a secure and fast internet network.

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The transiting exoplanet survey satellite, TESS

Launched on April 18, 2018, aboard a SpaceX Falcon 9 rocket, NASA’s Transiting Exoplanet Survey Satellite (TESS) is a mission to search nearby stars for undiscovered worlds with a gold of discovering thousands of exoplanets around nearby bright stars.

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From the Terminator to Spiderman’s suit, self-repairing robots and devices abound in sci-fi movies. In reality, though, wear and tear reduce the effectiveness of electronic devices until they need to be replaced. What is the cracked screen of your mobile phone healing itself overnight, or the solar panels providing energy to satellites continually repairing the damage caused by micro-meteorites?

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