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Category: satellites

Primordial magnetic fields (PMFs), being present before the epoch of cosmic recombination, induce small-scale baryonic density fluctuations. These inhomogeneities lead to an inhomogeneous recombination process that alters the peaks and heights of the large-scale anisotropies of the cosmic microwave background (CMB) radiation. Utilizing numerical compressible MHD calculations and a Monte Carlo Markov chain analysis, which compares calculated CMB anisotropies with those observed by the WMAP and Planck satellites, we derive limits on the magnitude of putative PMFs. We find that the total remaining present day field, integrated over all scales, cannot exceed 47 pG for scale-invariant PMFs and 8.9 pG for PMFs with a violet Batchelor spectrum at 95% confidence level.

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SpaceX wants to begin connecting moving vehicles – from cars and trucks to jets and ships – to its Starlink satellite internet network, according to a request the company filed with the Federal Communications Commission.

“This application would serve the public interest by authorizing a new class of ground-based components for SpaceX’s satellite system that will expand the range of broadband capabilities available to moving vehicles throughout the United States and to moving vessels and aircraft worldwide,” SpaceX director of satellite policy David Goldman wrote in a letter to the FCC filed on Friday.

Starlink is the company’s capital-intensive project to build an interconnected internet network with thousands of satellites, known in the space industry as a constellation, designed to deliver high-speed internet to consumers anywhere on the planet.

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SpaceX has launched another batch of its Starlink satellites — the usual complement of 60 of the low Earth orbit spacecraft, which will join the more than 1000 already making up the existing constellation. This is the fifth launch of Starlink satellites for SpaceX this year, and the twentieth overall.

Earlier this year, SpaceX opened up Starlink access to anyone in a current or planned service area via a pre-order reservation system with a refundable up-front deposit. The company aims to continue launches like this one apace throughout 2021 in order to get the constellation to the point where it can serve customers over a much larger portion of the globe. SpaceX COO and President Gwynne Shotwell has previously said that the company expects it should have coverage over much of the globe at a constellation size of around 1200 satellites, but the company has plans to launch more than 30000 to fully build out its network capacity and speed.

While SpaceX is making good progress on Starlink with its Falcon 9 launcher, it’s also looking ahead to Starship as a key driver of the constellation’s growth. Starship, SpaceX’s next-generation launch vehicle currently under development in South Texas, will be able to deliver to orbit 400 Starlink satellites at a time, and it’s also being designed with full reusability and fast turnaround in mind.

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Japanese space startup Gitai has raised a $17.1 million funding round, a Series B financing for the robotics startup. This new funding will be used for hiring, as well as funding the development and execution of an on-orbit demonstration mission for the company’s robotic technology, which will show its efficacy in performing in-space satellite servicing work. That mission is currently set to take place in 2023.

Gitai will also be staffing up in the U.S., specifically, as it seeks to expand its stateside presence in a bid to attract more business from that market.

“We are proceeding well in the Japanese market, and we’ve already contracted missions from Japanese companies, but we haven’t expanded to the U.S. market yet,” explained Gitai founder and CEO Sho Nakanose in an interview. So we would like to get missions from U.S. commercial space companies, as a subcontractor first. We’re especially interested in on-orbit servicing, and we would like to provide general-purpose robotic solutions for an orbital service provider in the U.S.”

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