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Solving the liquid oxygen problem; a rare look inside working at SpaceX

Here is my super exclusive interview with Phillip Rench, one of the former SpaceX employees featured in Eric Berger's new book, 'Reentry', which is the sequel to Liftoff: The Desperate and Early Days ...
Hosted on MSN

Not all silver ETFs give same return: Why most silver ETFs differ in their prices and returns when tracking same high purity silver

All silver exchange traded funds (ETFs) track the prices of high purity silver, but their net asset values (NAVs) differ. Plus, the return from these ETFs can vary quite a bit. For example, the NAV ...
IEEE

Residual GNSS Ionospheric Error Analysis in Future Low Earth Orbit Applications

Abstract: Future low Earth orbit (LEO) applications such as LEO positioning, navigation, and timing (PNT) and LEO-based monitoring of global navigation satellite systems (GNSS) are expected to ...