NEC Corporation’s Post

Do you know atmospheric turbulence is an essential factor to consider when finding the optimal place for a VGOS telescope? Our recently published article discusses the answer to this question. The work is limited to the Indian subcontinent but can be adapted globally. Link to the paper: https://lnkd.in/gAEnZhyp #Geodesy #Research #VLBI #Earthobsevation #SpringerNature

The Slingshot Global Sensor Network is tracking a new object in low Earth orbit (LEO) which is expected to have been deployed by a Chinese spaceplane. China’s Shenlong reusable spaceplane (NORAD ID: 58573), which is on its third LEO mission, appears to have released a secondary object (NORAD ID: 59884) at an altitude of approximately 620 km. The graphic below shows tracking data on the spaceplane before and after the secondary object was deployed. Based on this data, we estimate that the secondary object was deployed on May 24 between 16:30 UTC and 22:50 UTC and that the spaceplane maneuvered away from the secondary object soon after deployment. 𝗨𝗡𝗖𝗨𝗘𝗗 𝗟𝗘𝗢 𝗧𝗥𝗔𝗖𝗞𝗜𝗡𝗚 𝗔𝗧 𝗦𝗖𝗔𝗟𝗘 A newly operational Horus optical fence sensor system in Central Australia first observed the secondary object without a cue on May 25, 2024, at 08:33 UTC – approximately 9-16 hours after separating from the Chinese spaceplane, highlighting Horus’ ability to detect new objects without any cues or direct tasking. 𝗣𝗛𝗢𝗧𝗢𝗠𝗘𝗧𝗥𝗜𝗖 𝗢𝗕𝗝𝗘𝗖𝗧 𝗖𝗛𝗔𝗥𝗔𝗖𝗧𝗘𝗥𝗜𝗭𝗔𝗧𝗜𝗢𝗡 In addition to tracking data, the GSN also produces photometric data (e.g., light curves) that can help distinguish two closely spaced objects based on the variation in their visual magnitude (or brightness). In this case, the newly-released object appears consistently dimmer than the spaceplane indicating that the secondary object is likely smaller in size (i.e., it has a smaller cross-section). The photometric signature for the secondary object also suggests that the secondary object is stable (i.e., not tumbling). 𝗧𝗜𝗠𝗘𝗟𝗜𝗡𝗘 𝗢𝗙 𝗘𝗩𝗘𝗡𝗧𝗦 • December 14, 2023: China’s Shenlong reusable spaceplane is launched for the third time by China Aerospace Science and Technology Corp (CASC) • January-February 2024: Slingshot detects several maneuvers by the Chinese spaceplane in LEO  • May 24, 2024: Slingshot’s Horus sensor detects the presence of a secondary object (NORAD ID: 59884) believed to have been released from the spaceplane (NORAD ID: 58573) 𝗛𝗜𝗦𝗧𝗢𝗥𝗬 𝗥𝗘𝗣𝗘𝗔𝗧𝗜𝗡𝗚 𝗜𝗧𝗦𝗘𝗟𝗙 If this story sounds familiar, that’s because you’ve heard it before. The Slingshot Global Sensor Network tracked a similar release from China’s spaceplane in November 2022 when it appeared to release a secondary object (NORAD ID: 54218) – which conducted rendezvous and proximity operations (RPO) with the spaceplane for about 4 months before redocking with the spaceplane on March 30, 2023. The spaceplane successfully reentered Earth’s atmosphere and landed on May 8, 2023. Learn more about the Slingshot Global Sensor Network and how persistent space object tracking can advance your mission here: https://lnkd.in/g4Gn-tFv

How powerful is this?!? Given global geopolitical tension… the ability to be first to detect space threats to sovereign or commercial entities is effectively priceless. 📈🧠🚀📡🛰️ #defensetech #aerospace #privateequity #artificialintelligence #satellites #geopolitics #venturecapital #institutionalinvestors

The Rosette Nebula (also known as Caldwell 49 or Sharpless 275) is a large spherical ionized atomic hydrogen region (H II region) that is circular in appearance and located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter (from Wikipedia). The nebula is about 5,200 light-years away and spans nearly 65 light-years. This version has been processed using the Hubble Palette and the stars have been removed from the image.. Observation data: J2000.0 epoch Right ascension: 06h 33m 45s Declination: +04° 59′ 54″ Distance: 5,200 ly Apparent magnitude (V): 9.0 Apparent dimensions (V): 1.3 ° Constellation: Monoceros Tech Specs: Williams Optics Redcat 51 Telescope, ZWO ASI071MC camera running at -10F, total capture 5 hours and 30 minutes using 300-second exposures, Optolong L-eXtreme 2” filter, Sky-Watcher EQ6R-Pro mount, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: February 4, 2024. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).

Hello Dear friends In the past one or two years, I have been doing activities according to my interests that have been in use for more than two decades The past is precedent, I have developed. My first favorite subject has been in the field of " passive microwave devices , which is mostly in the field of designing and manufacturing various types of microwave filters, including low-pass, band-pass with micro strip topology, directional couplers in UHF,L, S, X frequency bands,Different types of antennas with saddle pattern generation capability in the VHF and UHF frequency bands for low earth orbit (LEO) satellites. The second issue that happened almost a decade after a gap of several years was in the field of designing satellite communication links in the orbit of Leo, Geo,... Accordingly, during the past two years, I have revived and developed my favorite activities as follows: A- Documenting the design principles of microwave filters with microstrip technology, which is in the form of a book for Persian language enthusiasts called "Microwave filters with microstrip structure, from design to implementation, Etihad Publishing, 1402 (  فیلترهای مایکرویو با ساختار میکرواستریپ ، از طرح تا عمل ، نشر اتحاد ، ۱۴۰۲ ) in cooperation with Sazgan Ertebat Engineering Company, which is in the process of manufacturing and testing facilities This company has been used and I express my gratitude here. B- 1- Designing the telecommunication link budget for Application of narrow band Internet of Things of LEO satellite constellation systems . 2- Budget design of deep space telecommunication link in S, X and UHF bands ,........ In the past 4 years, I prepared and published the results of my previous activities in the field of designing satellite links in Leo orbit, Ettehad Publishing 2019, with the aim of documenting experiences, in the form of a book Persian language enthusiasts called " telemetry and command،tracking communication systems in the satellites" or سیستم های مخابرات تله متری و فرمان و ردیابی  در ماهواره ها .نشر اتحاد 1399 It is worth mentioning that those who are interested in each of the above areas have any comments and points of view about the contents of the book or outside of it, I will be very proud to hear them and use them as necessary.

Discover how SKF adjustable chocks are playing a crucial role in the stability and performance of the Extremely Large Telescope (ELT) at the European Southern Observatory (ESO). This article delves into the innovative technology and precision engineering that SKF brings to this groundbreaking project. 🔗 Read the full article here: https://lnkd.in/dv_27WrD #ZambiaMiningNews #EngineeringInnovation #SKFTechnology #ESO #Telescope

Outgassing: The Silent Saboteur in Space In the unforgiving vacuum of space, a silent phenomenon known as outgassing can pose a significant threat. Outgassing is the process where materials, under the influence of vacuum or high temperatures, release trapped by-products such as water vapor, gases, oil, or additives.   Choosing materials for space applications isn’t just about strength and durability. It’s also about understanding and mitigating the risks of outgassing. Outgassing can lead to significant complications for satellites or spacecraft, subtly affecting vital components like electronics, optics, and sensors. Moreover, it can even present health hazards, adding another layer of complexity to this issue. Click (https://lnkd.in/g_dwwr59) to understand more about outgassing. #TheGundCompany #QualityAssurance #SpaceMaterials #Outgassing

Abstract :"#Extraterrestrial #minerals on the surface of airless #SolarSystem bodies undergo gradual alteration processes known as #space #weathering over long periods of time. The #signatures of #spaceWeathering help us understand the #phenomena occurring in the Solar System. However, #meteorites rarely retain the signatures, making it impossible to study the space weathering processes precisely. Here, we examine samples retrieved from the asteroid Ryugu by the Hayabusa2 spacecraft and discover the presence of nonmagnetic framboids through electron holography measurements that can visualize magnetic flux. Magnetite particles, which normally provide a record of the nebular magnetic field, have lost their magnetic properties by reduction via a high-velocity (>5 km s–1) impact of a micrometeoroid with a diameter ranging from 2 to 20 μm after destruction of the parent body of Ryugu. Around these particles, thousands of metallic-#iron #nanoparticles with a #vortex #magnetic domain #structure, which could have recorded a magnetic field in the impact event, are found. Through measuring the remanent #magnetization of the iron nanoparticles, #future studies are expected to elucidate the nature of the #nebular/ #interplanetary magnetic fields after the termination of aqueous #alteration in an #asteroid." https://lnkd.in/eWwiyNsc "Nonmagnetic framboid and associated iron nanoparticles with a space-weathered feature from #asteroidRyugu" #JAXA #HokkaidoUniversity

*Coronal Mass Ejection ( CME )* A Coronal Mass Ejection (CME) is a massive burst of solar wind and magnetic fields rising above the solar corona or being released into space....... CMEs are large clouds of plasma and magnetic field that erupt from the sun's corona and travel through space.....When these ejections reach Earth..They can cause geomagnetic storms that may disrupt satellite communications, GPS signals, and power grids....... CMEs are usually associated with solar flares and can release up to a billion tons of material at speeds over a million miles per hour.....These events are part of the sun's 11 year solar cycle...Where solar activity.. including sunspots and flares, increases and decreases..... Understanding CMEs helps scientists predict space weather and protect technology on Earth......By studying the sun... Scientists aim to mitigate the effects of these powerful solar events on our modern infrastructure...... #sun #cme #solarwind #magneticfield #geomagnetic #plasma #signal #communication #space #spacecraft

World's First Smartphone-Enabled Satellite Chinese scientists have developed the world's first satellite, "Tiantong," enabling smartphone calls directly, bypassing ground-based infrastructure. Inspired by the Tower of Babel story, it aims to bridge communication gaps, especially in emergencies like the recent Gansu earthquake, where it proved invaluable. Led by Cui Wanzhao from the China Academy of Space Technology, the team overcame technical challenges like passive intermodulation (PIM) to enhance satellite call quality. The Tiantong satellites boast sensitive reception capabilities, eliminating the need for external antennas and working across various frequency bands. These advancements pave the way for a future where geographic isolation no longer means communication isolation.