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💧🌏 Greg CocksGlacial Lake Mapping Using Remote Sensing Geo-Foundation Model -- <a href="https://doi.org/10.1016/j.jag.2025.104371" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://doi.org/10.1016/j.jag.2025.104371</a> <-- shared paper -- HIGHLIGHTS: • Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping. • Achieved an F1 score of 0.894 on Sentinel-1&2, surpassing CNNs scoring below 0.8. • Maintains strong performance with 50% less training data, proving efficiency. • Excels in detecting small lakes (<0.01km²) and handling clouds and complex terrains..." <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="tag">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="tag">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="tag">#mapping</a> <a href="https://techhub.social/tags/glaciallake" class="mention hashtag" rel="tag">#glaciallake</a> <a href="https://techhub.social/tags/GeospatialFoundationModel" class="mention hashtag" rel="tag">#GeospatialFoundationModel</a> <a href="https://techhub.social/tags/satellite" class="mention hashtag" rel="tag">#satellite</a> <a href="https://techhub.social/tags/Sentinel" class="mention hashtag" rel="tag">#Sentinel</a> <a href="https://techhub.social/tags/GaoFen" class="mention hashtag" rel="tag">#GaoFen</a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="tag">#remotesensing</a> <a href="https://techhub.social/tags/earthobservation" class="mention hashtag" rel="tag">#earthobservation</a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="tag">#model</a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="tag">#modeling</a> <a href="https://techhub.social/tags/climatechange" class="mention hashtag" rel="tag">#climatechange</a> <a href="https://techhub.social/tags/glacial" class="mention hashtag" rel="tag">#glacial</a> <a href="https://techhub.social/tags/glacier" class="mention hashtag" rel="tag">#glacier</a> <a href="https://techhub.social/tags/melt" class="mention hashtag" rel="tag">#melt</a> <a href="https://techhub.social/tags/melting" class="mention hashtag" rel="tag">#melting</a> <a href="https://techhub.social/tags/UViT" class="mention hashtag" rel="tag">#UViT</a> <a href="https://techhub.social/tags/deepleanring" class="mention hashtag" rel="tag">#deepleanring</a> <a href="https://techhub.social/tags/AI" class="mention hashtag" rel="tag">#AI</a> <a href="https://techhub.social/tags/framework" class="mention hashtag" rel="tag">#framework</a> <a href="https://techhub.social/tags/performance" class="mention hashtag" rel="tag">#performance</a> <a href="https://techhub.social/tags/metrics" class="mention hashtag" rel="tag">#metrics</a> <a href="https://techhub.social/tags/opensource" class="mention hashtag" rel="tag">#opensource</a>

notforsale ground stationdari data telemetri lora yang didapat dari <a href="https://mastodon.social/@tinygs" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@tinygs</a>, lalu di masukkan ke aplikasi google earth, kita bisa melihat dengan sangat jelas perbedaan ketinggian rata - rata antara satelit gaofen, spacebee, dan starlink.urutan dari paling tinggi ke paling rendah : gaofen, spacebee, starlink.untuk gaofen sendiri terbagi lagi. ada yang atas dan bawah. yang bawah hampir sama dengan spacebee. <a href="https://mastodon.social/tags/tinygs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tinygs</a> <a href="https://mastodon.social/tags/starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#starlink</a> <a href="https://mastodon.social/tags/lora" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#lora</a> <a href="https://mastodon.social/tags/spacebee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#spacebee</a> <a href="https://mastodon.social/tags/gaofen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gaofen</a> <a href="https://mastodon.social/tags/tianqi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tianqi</a> <a href="https://mastodon.social/tags/satellite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#satellite</a> <a href="https://mastodon.social/tags/earth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#earth</a>

notforsale ground stationto get lora signal from starlink satellite is more difficult than signal from gaofen/tianqi satellite. gaofen signal at 70cm is stronger. while starlink signal at 2m is relatively weaker. from my experience, besides LNA, the main factor that will dramatically change the reception of lora signal from starlink is the use of filters. yes. a sharp frequency filter at 137 mhz will really help and change the situation. believe me!<a href="https://mastodon.social/tags/tinygs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tinygs</a> <a href="https://mastodon.social/tags/lora" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#lora</a> <a href="https://mastodon.social/tags/starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#starlink</a> <a href="https://mastodon.social/tags/gaofen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gaofen</a> <a href="https://mastodon.social/tags/tianqi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tianqi</a> <a href="https://mastodon.social/tags/amsat" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#amsat</a>

notforsale ground stationIf you open <a href="https://mastodon.social/@tinygs" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@tinygs</a> web console, you will find the radiating map as below. from the heatmap we can find out the radiation pattern of the antenna we are using and the distribution of the satellite that the lora board receives.after i double checked, i realized that there is an altitude difference between 137mhz and 433 mhz satellites. 433 satellites like <a href="https://mastodon.social/tags/gaofen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gaofen</a> 21,22,23,24 operate at 800km. norby at 550km. while 137 satellites like <a href="https://mastodon.social/tags/starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#starlink</a> and <a href="https://mastodon.social/tags/spacebee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#spacebee</a> are at 300-500km.<a href="https://mastodon.social/tags/tinygs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tinygs</a>

RTN<a href="https://chaos.social/tags/Xinhua" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Xinhua</a>: "China's hyperspectral remote-sensing satellite put into use" "..Gaofen-5 01A, was launched into space on Dec. 9, 2022. It can provide high-quality hyperspectral data for diverse fields.." "..runs in the sun's synchronous regression orbit, 705 kilometers above Earth."<a href="https://english.news.cn/20240123/51e5090b542a4a9eb3beb3559fd19a7a/c.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://english.news.cn/20240123/51e5090b542a4a9eb3beb3559fd19a7a/c.html</a>23.1.2024<a href="https://chaos.social/tags/China" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#China</a> <a href="https://chaos.social/tags/CNSA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CNSA</a> <a href="https://chaos.social/tags/Erdbeobachtung" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Erdbeobachtung</a> <a href="https://chaos.social/tags/Gaofen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Gaofen</a> <a href="https://chaos.social/tags/Gaofen5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Gaofen5</a> <a href="https://chaos.social/tags/SAST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SAST</a> <a href="https://chaos.social/tags/Satelliten" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Satelliten</a> <a href="https://chaos.social/tags/Raumfahrt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Raumfahrt</a>

Ansgar Schmidt :verified:China to launch new station modules and collaborate with Europe on science missions in 2023 <a href="https://www.nasaspaceflight.com/2022/12/china-2023/" rel="nofollow noopener noreferrer" target="_blank">https://www.nasaspaceflight.com/2022/12/china-2023/</a> <a href="https://mastodon.cloud/tags/international" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#international</a> <a href="https://mastodon.cloud/tags/changzheng3b" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#changzheng3b</a> <a href="https://mastodon.cloud/tags/changzheng4b" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#changzheng4b</a> <a href="https://mastodon.cloud/tags/featured" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#featured</a> <a href="https://mastodon.cloud/tags/tiangong" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tiangong</a> <a href="https://mastodon.cloud/tags/chinese" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#chinese</a> <a href="https://mastodon.cloud/tags/taiyuan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#taiyuan</a> <a href="https://mastodon.cloud/tags/xichang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#xichang</a> <a href="https://mastodon.cloud/tags/gaofen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gaofen</a> <a href="https://mastodon.cloud/tags/shiyan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#shiyan</a> <a href="https://mastodon.cloud/tags/china" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#china</a> <a href="https://mastodon.cloud/tags/cz" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cz</a>-3b <a href="https://mastodon.cloud/tags/cz" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cz</a>-4b

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