SpaceX and Space Force set to launch long-delayed GPS mission

spacexspaceforceoct2020

SpaceX shared this scenic view of the Falcon 9 that will carry Space Force’s GPS satellite into orbit. 


SpaceX

More than a month after a last-second scrub, SpaceX says it’s now ready to launch the latest US Space Force mission atop a Falcon 9 rocket later this week.

The payload is a third-generation military GPS satellite that was initially set for blastoff in late September but then got pushed back a few days. It came close to launching on Oct. 2, but the launch was aborted with just two seconds to go on the countdown clock.

The unexpected issue led to a few other delays, notably of NASA’s Crew-1 mission to send four astronauts to the International Space Station aboard a SpaceX Crew Dragon capsule, out of concern that the issue could crop up on other Merlin engines.

An investigation revealed that a bit of “masking lacquer” had blocked a relief valve line, causing two of the rocket’s nine Merlin engines to attempt to fire early. The suspect engines were swapped out and new launch dates set.

Now the static test fire for the rocket that will launch the GPS III Space Vehicle (SV) 04 has been completed, and SpaceX says it expects liftoff from Cape Canaveral in Florida Thursday evening.

The first-stage booster for this mission will be making its first flight and will attempt to land on a droneship in the Atlantic less than 10 minutes after liftoff. It’s not clear whether SpaceX will try to recover the nose cone halves as well.

The launch is set for a 15-minute window that opens at 3:24 p.m. PT (6:24 p.m. Florida time), and you can watch it unfold via the feed above.


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Einstein’s theory of relativity, critical for GPS, seen in distant stars

Einstein's theory of relativity, critical for GPS, seen in distant stars
The intriguing system known as 4U 1916-053 contains two stars in a remarkably close orbit. One is the core of a star that has had its outer layers stripped away, leaving a star that is much denser than the Sun. The other is a neutron star, an even denser object created when a massive star collapses in a supernova explosion. The neutron star (grey) is shown in this artist’s impression at the center of a disk of hot gas pulled away from its companion (white star on left). Credit: Spectrum: NASA/CXC/University of Michigan/N. Trueba et al.; Illustration: NASA/CXC/M. Weiss

What do Albert Einstein, the Global Positioning System (GPS), and a pair of stars 200,000 trillion miles from Earth have in common?


The answer is an effect from Einstein’s General Theory of Relativity called the “gravitational redshift,” where light is shifted to redder colors because of gravity. Using NASA’s Chandra X-ray Observatory, astronomers have discovered the phenomenon in two stars orbiting each other in our galaxy about 29,000 light years (200,000 trillion miles) away from Earth. While these stars are very distant, gravitational redshifts have tangible impacts on modern life, as scientists and engineers must take them into account to enable accurate positions for GPS.

While scientists have found incontrovertible evidence of gravitational redshifts in our solar system, it has been challenging to observe them in more distant objects across space. The new Chandra results provide convincing evidence for gravitational redshift effects at play in a new cosmic setting.

The intriguing system known as 4U 1916-053 contains two stars in a remarkably close orbit. One is the core of a star that has had its outer layers stripped away, leaving a star that is much denser than the Sun. The other is a neutron star, an even denser object created when a massive star collapses in a supernova explosion. The neutron star (grey) is shown in this artist’s impression at the center of a disk of hot gas pulled away from its companion (white star on left).

These two compact stars are only about 215,000 miles apart, roughly the distance between the Earth and the Moon. While the Moon orbits our planet once a month, the dense companion star in 4U 1916-053 whips around the neutron star and completes a full orbit in only 50 minutes.

In the new work on 4U 1916-053, the team analyzed X-ray spectra—that is, the amounts of X-rays at different wavelengths—from Chandra. They found the characteristic signature of the absorption of X-ray light by iron and silicon in the spectra. In three separate observations with Chandra, the data show a sharp drop in the detected amount of X-rays close to the wavelengths where the iron or silicon atoms are expected to absorb the X-rays. One of the spectra showing absorption by iron—the dips on the left and right—is included in the main graphic. An additional graphic shows a spectrum with absorption by silicon. In both spectra the data are shown in grey and a computer model

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GPS Anti-Jamming Market Forecast to 2027

The global GPS anti-jamming market was valued at US$ 4,036. 9 million in 2019 and is projected to reach US$ 6,523. 7 million by 2027; it is expected to grow at a CAGR of 6. 4% during 2020–2027.

New York, Oct. 21, 2020 (GLOBE NEWSWIRE) — Reportlinker.com announces the release of the report “GPS Anti-Jamming Market Forecast to 2027 – COVID-19 Impact and Global Analysis by Receiver Type, Anti-Jamming Technique, Application, and End User” – https://www.reportlinker.com/p05978076/?utm_source=GNW
However, the ongoing COVID-19 outbreak is anticipated to affect the growth rate of the market in 2020 and early 2021 owing to disruptions in global supply chains, decrease in demand and production, and negative impact on economic as well as industrial growth in major North America, Europe, and Asia Pacific countries.

GPS is a monitoring station and satellite network that transmits signals that are used for positioning, timing, and navigation operations.The signals are free, reliable, and extremely accurate.

GPS anti-jamming protects GPS receivers from malicious intentional jamming and interference activities.Growing adoption of GPS anti-jamming solutions in the military and defense sector drives the global GPS anti-jamming market growth.

Growing demand for unnamed airborne vehicles (UAVs) is another factor supporting the global GPS anti-jamming market growth.However, old, conventional GPS receivers are not compliant with modern enhanced technologies; thus, GPS compatibility issues might hamper the market growth in the coming years.

Further, the existence of other alternatives to the GPS anti-jamming systems, such as precision terrain aided navigation, is another major factor impeding the GPS anti-jamming market growth.

Overall size of the GPS anti-jamming market has been derived using both primary and secondary sources.To begin the research process, exhaustive secondary research has been conducted using internal and external sources to obtain qualitative and quantitative information related to the market.

The process also serves the purpose of obtaining overview and forecast for the GPS anti-jamming market with respect to all the segments pertaining to the region.Also, multiple primary interviews have been conducted with industry participants and commentators to validate the data, as well as to gain more analytical insights into the topic.

The participants involved in this process include industry experts such as VPs, business development managers, market intelligence managers, and national sales managers, along with external consultant such as valuation experts, research analysts and key opinion leaders specializing in the GPS anti-jamming market. L3HARRIS Technologies, Inc., Cobham Limited, BAE SYSTEMS PLC, Lockheed Martin Corporation, Raytheon Technologies, Thales Group, FURUNO ELECTRIC CO., LTD., NovAtel Inc., Mayflower Communications, and infiniDome Ltd. are among the key market players profiled during this market study.
Read the full report: https://www.reportlinker.com/p05978076/?utm_source=GNW

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