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#gaofen

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💧🌏 Greg Cocks<p>Glacial Lake Mapping Using Remote Sensing Geo-Foundation Model<br>--<br><a href="https://doi.org/10.1016/j.jag.2025.104371" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">doi.org/10.1016/j.jag.2025.104</span><span class="invisible">371</span></a> &lt;-- shared paper<br>--<br>HIGHLIGHTS:<br> • Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping.<br> • Achieved an F1 score of 0.894 on Sentinel-1&amp;2, surpassing CNNs scoring below 0.8.<br> • Maintains strong performance with 50% less training data, proving efficiency.<br> • Excels in detecting small lakes (&lt;0.01km²) and handling clouds and complex terrains..."<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/glaciallake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glaciallake</span></a> <a href="https://techhub.social/tags/GeospatialFoundationModel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GeospatialFoundationModel</span></a> <a href="https://techhub.social/tags/satellite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellite</span></a> <a href="https://techhub.social/tags/Sentinel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sentinel</span></a> <a href="https://techhub.social/tags/GaoFen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GaoFen</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/earthobservation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>earthobservation</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/climatechange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>climatechange</span></a> <a href="https://techhub.social/tags/glacial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glacial</span></a> <a href="https://techhub.social/tags/glacier" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glacier</span></a> <a href="https://techhub.social/tags/melt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>melt</span></a> <a href="https://techhub.social/tags/melting" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>melting</span></a> <a href="https://techhub.social/tags/UViT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>UViT</span></a> <a href="https://techhub.social/tags/deepleanring" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>deepleanring</span></a> <a href="https://techhub.social/tags/AI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AI</span></a> <a href="https://techhub.social/tags/framework" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>framework</span></a> <a href="https://techhub.social/tags/performance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>performance</span></a> <a href="https://techhub.social/tags/metrics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metrics</span></a> <a href="https://techhub.social/tags/opensource" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>opensource</span></a></p>
notforsale ground station<p>If you open <span class="h-card" translate="no"><a href="https://mastodon.social/@tinygs" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>tinygs</span></a></span> 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.</p><p>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">#<span>gaofen</span></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">#<span>starlink</span></a> and <a href="https://mastodon.social/tags/spacebee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spacebee</span></a> are at 300-500km.</p><p><a href="https://mastodon.social/tags/tinygs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tinygs</span></a></p>
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