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BEIJING: Due to the sensitivity on the information of satellites systems, the public at-large may never know the real truth over whether the BeiDou 3 is better than the US-based GPS. Nevertheless, we have certainty that both navigation systems stand at high quality compared with each other.Chinese and American scientists are at the top of their fields when it comes to developing satellites and upgrading technologies. California’s Silicon Valley is the world leading hub for the science and hi-tech sectors, but the Chinese are making major headway with a nationwide drive for innovation.The Chinese government has boosted public spending on education, supporting R&D (research and development) projects for science, while Chinese private enterprises are making massive investments into the science/hi-tech industries.Accordingly, many smart Chinese scientists are employed to develop the BeiDou satellite networks. Let’s dive deeper to get further background on the Beidou 3 from Nasaspaceflight:https://www.nasaspaceflight.com/2020/06/china-complete-beidou-constellation-long-march-3b/According to Nasaspaceflight:“China has launched the final Beidousatellite to complete its orbital navigation constellation. Launch of the Beidou-3GEO3 used the Long March/Chang Zheng-3B/G2 (Y68) rocket and lifted off on 22 June at 21:43 EDT (23 June at 01:43 UTC) from pad LC-2 at the Xichang Satellite Launch Center.It will be “some time” before China comments on the success of the mission, but all events through third stage shutdown and initial parking orbit insertion occurred successfully.”As reported by Nasaspaceflight, we learn such details including that the satellites have the ‘Geosynchromous Earth Orbit’ component of the third phase, which has resulted in the total expansion of the system for global navigation coverage.The satellite is based on the DFH-3B bus, which holds a phased array antenna to create navigation signals alongside a laser reflector while coming equipped with an apogee propulsion system for final orbit insertion. The satellite weighs in at 4,600-kg.The entire BeiDou Navigation Satellite system (BDS) was constructed independently and operated by China alone.Therefore, the system is used primarily by the Chinese government and its citizens for national security, economic and social development purposes. The BDS offers all-time, all-weather and high-accuracy positioning for its global users.The system can be applied to support communication, marine fishery, hydrological monitoring, weather forecasting, surveying, mapping, forest fires-prevention, time synchronization for communications systems, power dispatching, disaster mitigation, as well as relief, emergency and rescue alongside other fields.The BDS can be shared by others around the world, despite its Chinese origins. Beijing has applied the principle that “BDS is developed by China, and dedicated to the world” to serve the development of the Belt & Road Initiative that can promote further international cooperation, according to Nasaspaceflight.The first in a series of BeiDou 3 satellites was launched into space by the ‘Long March’rocket carrier on January 16, 2010. China continues to launch a series of satellites into orbit on most years since then.The last of the first third-genration BeiDou 3 went into orbit on February 1, 2016. The BDS is getting more advanced each day and we can get more details from Space News. The link is here:https://spacenews.com/final-beidou-3-satellite-reaches-operational-orbit-chinas-launch-sites-gear-up-for-july-missions/As reported by Space News:“As well as PNT services the Beidousystem offers short message communication through its satellites placed in geosynchronous orbits.The fully operational Beidou system consists of 24 satellites in medium Earth orbit, three in geostationary orbit and three more in inclined geosynchronous orbits. An earlier plan outlined a total of 35 operational satellites.”Apparently, you can find plenty of information on BeiDou 3 but in reference to the Quora question: Is it better than GPS? Well, let’s have the readers make their own judgements here.

Satellite Sentinel Project (SSP) has issued reports and imagery documenting a range of crimes against humanity since its founding in 2010, but in the past six months alone SSP has issued 10 reports showing intentional destruction to civilian targets—including homes, markets, humanitarian care providers—in Sudan and South Sudan. In its most recent report, on March 10, SSP documented huts that had been burned since February 9, 2014 in Duk Payuel, in South Sudan’s Jonglei state, near a clinic and orphanage supported by two Lost Boys.A sequence of reports featuring SSP images from February 26, February 19, and January 28 have documented growing devastation and war crimes in the multi-ethnic city of Malakal, in South Sudan’s Upper Nile state. The first report identified at least 210 burned huts, and looting of a World Food Program compound. The second report identified more than 535 destroyed huts with 57 destroyed huts in a residential area, and 77 destroyed huts in a market area that had lost 40 percent of its market stalls. The third report found almost half the city damaged, with new destruction of some 1500 structures that brought the total number of destroyed homes in Malakal to 3,820, with 170 destroyed market stalls. SSP imagery showed active fires throughout several areas in the city, including near a hospital, and a pattern of torched homes that suggests intentional destruction.Other SSP reports have documented damage to other towns across South Sudan. On February 4, SSP published images showing huts engulfed in flames in the opposition leader’s oil-rich hometown of Leer, in Unity state. On January 24, SSP documented a scorched earth trail, with heavy damage to the Unity state towns of Bentiu, Rubkona, Mayom, Khor Bwow and other nearby villages. On January 12 and January 15, SSP showed the rapid growth of displaced people in camps in Bentiu, in Unity state, and Bor, the capital of Jonglei state. SSP imagery highlighted the successive destruction over several days to buildings in Bor and showed destruction to civilian dwellings in Mogiri village, in Central Equatoria state, and Mayom as well as damaged oil equipment in Teshwin, in Unity state.SSP sustains its focus north of South Sudan, in areas where civilians are vulnerable in Sudan. On October 21, 2013, SSP issued an urgent human security warning for civilians in South Kordofan state after detecting significant build-up and positioning of military equipment by the Sudanese government military forces that coincided with the destruction of a strategically important bridge. Within days of SSP’s issuing the human security warning, the Sudanese government announced a military campaign to “crush” rebellion in the area. On November 22, SSP issued a situation report showing deployment of armed forces and craters from air strikes, in addition to burning homes and vehicles in a North Kordofan town.

Goddio at work off the Egyptian north coast:Many discoveries in recent times have come from these two fields: maritime archaeology and aerial surveying.Franck Goddio has become world-renowned for his work off the coast.…in 2000, discovered the city of Thonis-Heracleion 7 km off the Egyptian shore in Aboukir Bay.[1] He led the excavation of the submerged site of Eastern Canopus and of Antirhodos in the ancient harbour of Alexandria (Portus Magnus).[2]His exhibitions include:Egypt’s Sunken Treasures:[10] A selection of some 500 artifacts unearthed during the excavations in Aboukir Bay and the port of Alexandria. Presented in Berlin (April – September 2006), Paris (December 2006 – March 2007), Bonn (April 2007 – January 2008), Madrid (April – December 2008), Turin (February – May 2009) and Yokohama (June – September 2009).Cleopatra, The Search for the Last Queen of Egypt[11] A selection of 146 artefacts from Egypt's sunken treasures, displayed in the United States from 2010 to 2013, as part of the larger exhibition "Cleopatra,The Search for the Last Queen of Egypt" at the Franklin Institute in Philadelphia, at the Cincinnati Museum Center in Cincinnati, Ohio, at the Public Museum in Milwaukee, Wisconsin, and at the California Science Center in Los Angeles.Osiris, Mystères engloutis d'Égypte:[12] More than 290 pieces, mostly from the recent underwater excavations of IEASM directed by Franck Goddio in Aboukir Bay, were presented from September 7, 2015 to March 6, 2017 at the Institut du Monde Arabe in Paris. Some forty masterpieces from the museums of Cairo and Alexandria completed them - rare pieces, never seen before in France, some of which are coming out of Egypt for the first time.Sunken cities, Egypt's lost worlds:[13] The exhibition Osiris, Mystères engloutis d'Égypte was presented at the British Museum from May 19 to November 27, 2007.[14] The catalog of the exhibition was selected by Mary Beard for the list of [[15] books of the year of the literary supplement of the Times (TLS).Here is one artefact:This should be seen in its historical context, of magic in the Greco-Roman world:More on Goddio and maritime archaeology:FRANCK GODDIO SOCIETY HomepageSunken cities exhibitionAerial surveying and photography has been used with effect in archaeology since aircraft began carrying cameras. Today, we have Google Earth and satellite imaging. The exponent who has become famous for this is Sarah Parcak.Sarah Parcak Is a Space Archaeologist. Soon You Will Be Too: A satellite image of Dashur, Egypt before processing (left) and after (right). COURTESY SARAH PARCAK:Space Archaeologist Sarah Parcak Uses Satellites to Uncover Ancient Egyptian RuinsStreet plan of TanisArchaeology from spaceThis tech-savvy researcher of our past uses satellites and other remote-sensing tools to discover and explore stunning new evidence of lost cultures—including, just this year, another possible Viking site in North America. In addition, she has located an astonishing number of ancient Egyptian remains—thousands of settlements, lost tombs and hidden pyramids. A Yale- and Cambridge-trained Egyptologist and archaeologist, Parcak is a professor of anthropology at the University of Alabama at Birmingham, where she serves as founding director of the Laboratory for Global Observation.Around the world, hundreds of thousands of lost ancient sites lie buried and hidden from view. Satellite archaeologist Sarah Parcak is determined to find them before looters do. With the 2016 TED Prize, Parcak is building an online citizen-science tool called GlobalXplorer that will train an army of volunteer explorers to find and protect the world's hidden heritage. In this talk, she offers a preview of the first place they'll look: Peru — the home of Machu Picchu, the Nazca lines and other archaeological wonders waiting to be discovered.