Starlink Constellation (2019–present) by SpaceX comprises about 4,500 microsatellites in ~550 km LEO with Ku/Ka-band user links and laser crosslinks, enabling global internet including disaster response. James Webb Space Telescope (2021) features a 6.5 m segmented mirror and instruments NIRCam, NIRSpec, and MIRI, delivering the deepest infrared images of the universe including SMACS 0723 and…
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TIROS-1, launched by NASA on April 1, 1960, weighed about 120 kg and transmitted over 19,000 cloud images in 78 days, proving the concept of space-based weather observation. GOES-16 (GOES-East), launched in 2016 as part of the GOES-R series, delivers 0.5 km resolution imagery across 16 spectral bands and can scan as often as 30…
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As of March 2025, approximately 14,900 total satellites were in orbit, with about 11,000–12,000 active and 3,000–4,000 inactive or defunct. SpaceX’s Starlink has about 7,000–7,500 active satellites in orbit as of 2025, accounting for over 60% of all operational satellites and a goal of 42,000 total. OneWeb deployed 648 satellites with roughly 652 operational by…
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In 2000 Zimbabwe’s internet penetration was about 0.3%, rising to around 15% by 2011. The first ISPs were Data Control & Systems in 1994 and MWEB in 1995, with ZISPA counting nearly 30 ISPs by the 2000s. By early 2023 there were over 14 million active SIMs, roughly 85% of Zimbabwe’s population. Median mobile download…
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By 2030, satellite-connected IoT devices are projected to exceed 26 million and the market is expected to reach about $4 billion. The 3GPP Release-17 NTN standards were finalized in 2022, enabling a single IoT module to operate on both cellular and satellite networks. By 2027, 5G NR-NTN standards under 3GPP Releases 18 and 19 will…
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Executive Summary In summary, the 2025–2032 period will likely be remembered as the “gold rush” era for small satellite launch services, marked by fierce competition, rapidly advancing technology, and multiplying launch opportunities worldwide. For stakeholders – whether satellite operators planning constellations, investors evaluating launch companies, or government agencies seeking assured access to space – the…
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SOHO (Solar and Heliospheric Observatory), launched in 1995, became the first satellite to continuously observe the Sun from the Sun–Earth L1 point and carries the LASCO coronagraph, enabling CME tracking and the discovery of more than 5,000 comets. ACE (Advanced Composition Explorer), launched in 1997, and NOAA’s DSCOVR (Deep Space Climate Observatory), launched in 2015,…
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About 75% of the planet is obscured by cloud cover or darkness at any moment, making optical imaging inaccessible. Synthetic Aperture Radar (SAR) satellites actively illuminate the ground with microwave radar and synthesize a large aperture by moving the antenna to produce high-resolution images. SAR can operate day or night and in all weather, providing…
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Radar altimeters on TOPEX/Poseidon, Jason-1, Jason-2, Jason-3, and Sentinel-6 Michael Freilich have provided a global mean sea level record since 1992, showing a rise of about 3.3 millimeters per year and roughly 10 centimeters over 30 years. Arctic summer sea ice extent has declined by about 12% per decade since the 1980s, with the Arctic…
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By 2024, small satellites accounted for over 95% of all satellites launched annually. SpaceX’s Starlink operates the world’s largest constellation with over 7,000 active satellites in orbit as of late 2024. Starlink’s initial shell consisted of about 4,400 satellites at roughly 550 km altitude and 53° inclination, with FCC approval for about 12,000 satellites and…
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